Install log for 'mlpack'

* installing *source* package ‘mlpack’ ...
** this is package ‘mlpack’ version ‘4.8.0’
** package ‘mlpack’ successfully unpacked and MD5 sums checked
** using staged installation
** libs
using C++ compiler: ‘Apple clang version 14.0.3 (clang-1403.0.22.14.1)’
using SDK: ‘MacOSX11.3.1.sdk’
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c RcppExports.cpp -o RcppExports.o
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c adaboost.cpp -o adaboost.o
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c adaboost_classify.cpp -o adaboost_classify.o
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c adaboost_probabilities.cpp -o adaboost_probabilities.o
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c adaboost_train.cpp -o adaboost_train.o
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c approx_kfn.cpp -o approx_kfn.o
In file included from RcppExports.cpp:4:
In file included from ./../inst/include/mlpack.h:50:
In file included from ../inst/include/mlpack.hpp:27:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from adaboost_classify.cpp:9:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost_classify_main.cpp:34:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from adaboost.cpp:9:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost_main.cpp:34:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from adaboost_probabilities.cpp:9:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost_probabilities_main.cpp:34:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from approx_kfn.cpp:9:
In file included from ../inst/include/mlpack/methods/approx_kfn/approx_kfn_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from adaboost_train.cpp:9:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost_train_main.cpp:42:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost.hpp:31:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from RcppExports.cpp:4:
In file included from ./../inst/include/mlpack.h:50:
In file included from ../inst/include/mlpack.hpp:32:
In file included from ../inst/include/mlpack/methods/ann.hpp:17:
In file included from ../inst/include/mlpack/methods/ann/ann.hpp:34:
In file included from ../inst/include/mlpack/methods/ann/models/models.hpp:17:
In file included from ../inst/include/mlpack/methods/ann/models/yolov3/yolov3_tiny.hpp:274:
../inst/include/mlpack/methods/ann/models/yolov3/yolov3_tiny_impl.hpp:210:16: warning: unused variable 'numClasses' [-Wunused-variable]
  const size_t numClasses = classNames.size();
               ^
In file included from adaboost_classify.cpp:9:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost_classify_main.cpp:34:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from adaboost_classify.cpp:9:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost_classify_main.cpp:34:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from adaboost_classify.cpp:9:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost_classify_main.cpp:34:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from adaboost_probabilities.cpp:9:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost_probabilities_main.cpp:34:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from adaboost_probabilities.cpp:9:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost_probabilities_main.cpp:34:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from adaboost_probabilities.cpp:9:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost_probabilities_main.cpp:34:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from adaboost_train.cpp:9:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost_train_main.cpp:42:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost.hpp:31:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from adaboost_train.cpp:9:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost_train_main.cpp:42:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost.hpp:31:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from adaboost_train.cpp:9:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost_train_main.cpp:42:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost.hpp:31:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from approx_kfn.cpp:9:
In file included from ../inst/include/mlpack/methods/approx_kfn/approx_kfn_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from approx_kfn.cpp:9:
In file included from ../inst/include/mlpack/methods/approx_kfn/approx_kfn_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from approx_kfn.cpp:9:
In file included from ../inst/include/mlpack/methods/approx_kfn/approx_kfn_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from adaboost.cpp:9:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost_main.cpp:34:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from adaboost.cpp:9:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost_main.cpp:34:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from adaboost.cpp:9:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost_main.cpp:34:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from RcppExports.cpp:4:
In file included from ./../inst/include/mlpack.h:50:
In file included from ../inst/include/mlpack.hpp:27:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from RcppExports.cpp:4:
In file included from ./../inst/include/mlpack.h:50:
In file included from ../inst/include/mlpack.hpp:27:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from RcppExports.cpp:4:
In file included from ./../inst/include/mlpack.h:50:
In file included from ../inst/include/mlpack.hpp:27:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c bayesian_linear_regression.cpp -o bayesian_linear_regression.o
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c bayesian_linear_regression_predict.cpp -o bayesian_linear_regression_predict.o
69 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c bayesian_linear_regression_train.cpp -o bayesian_linear_regression_train.o
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c cf.cpp -o cf.o
In file included from bayesian_linear_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/bayesian_linear_regression/bayesian_linear_regression_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from bayesian_linear_regression_predict.cpp:9:
In file included from ../inst/include/mlpack/methods/bayesian_linear_regression/blr_predict_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from bayesian_linear_regression_predict.cpp:9:
In file included from ../inst/include/mlpack/methods/bayesian_linear_regression/blr_predict_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from bayesian_linear_regression_predict.cpp:9:
In file included from ../inst/include/mlpack/methods/bayesian_linear_regression/blr_predict_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from bayesian_linear_regression_predict.cpp:9:
In file included from ../inst/include/mlpack/methods/bayesian_linear_regression/blr_predict_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c dbscan.cpp -o dbscan.o
In file included from bayesian_linear_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/bayesian_linear_regression/bayesian_linear_regression_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from bayesian_linear_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/bayesian_linear_regression/bayesian_linear_regression_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from bayesian_linear_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/bayesian_linear_regression/bayesian_linear_regression_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from bayesian_linear_regression_train.cpp:9:
In file included from ../inst/include/mlpack/methods/bayesian_linear_regression/blr_train_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c decision_tree.cpp -o decision_tree.o
In file included from cf.cpp:9:
In file included from ../inst/include/mlpack/methods/cf/cf_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from bayesian_linear_regression_train.cpp:9:
In file included from ../inst/include/mlpack/methods/bayesian_linear_regression/blr_train_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from bayesian_linear_regression_train.cpp:9:
In file included from ../inst/include/mlpack/methods/bayesian_linear_regression/blr_train_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from bayesian_linear_regression_train.cpp:9:
In file included from ../inst/include/mlpack/methods/bayesian_linear_regression/blr_train_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c decision_tree_classify.cpp -o decision_tree_classify.o
In file included from dbscan.cpp:9:
In file included from ../inst/include/mlpack/methods/dbscan/dbscan_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from decision_tree.cpp:9:
In file included from ../inst/include/mlpack/methods/decision_tree/decision_tree_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from dbscan.cpp:9:
In file included from ../inst/include/mlpack/methods/dbscan/dbscan_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from dbscan.cpp:9:
In file included from ../inst/include/mlpack/methods/dbscan/dbscan_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from dbscan.cpp:9:
In file included from ../inst/include/mlpack/methods/dbscan/dbscan_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c decision_tree_probabilities.cpp -o decision_tree_probabilities.o
In file included from decision_tree_classify.cpp:9:
In file included from ../inst/include/mlpack/methods/decision_tree/decision_tree_classify_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c decision_tree_train.cpp -o decision_tree_train.o
In file included from decision_tree.cpp:9:
In file included from ../inst/include/mlpack/methods/decision_tree/decision_tree_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from decision_tree.cpp:9:
In file included from ../inst/include/mlpack/methods/decision_tree/decision_tree_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from decision_tree.cpp:9:
In file included from ../inst/include/mlpack/methods/decision_tree/decision_tree_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from decision_tree_classify.cpp:9:
In file included from ../inst/include/mlpack/methods/decision_tree/decision_tree_classify_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from decision_tree_classify.cpp:9:
In file included from ../inst/include/mlpack/methods/decision_tree/decision_tree_classify_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from decision_tree_classify.cpp:9:
In file included from ../inst/include/mlpack/methods/decision_tree/decision_tree_classify_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from cf.cpp:9:
In file included from ../inst/include/mlpack/methods/cf/cf_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from cf.cpp:9:
In file included from ../inst/include/mlpack/methods/cf/cf_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from cf.cpp:9:
In file included from ../inst/include/mlpack/methods/cf/cf_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from decision_tree_probabilities.cpp:9:
In file included from ../inst/include/mlpack/methods/decision_tree/decision_tree_probabilities_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from decision_tree_train.cpp:9:
In file included from ../inst/include/mlpack/methods/decision_tree/decision_tree_train_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from decision_tree_probabilities.cpp:9:
In file included from ../inst/include/mlpack/methods/decision_tree/decision_tree_probabilities_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from decision_tree_probabilities.cpp:9:
In file included from ../inst/include/mlpack/methods/decision_tree/decision_tree_probabilities_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from decision_tree_probabilities.cpp:9:
In file included from ../inst/include/mlpack/methods/decision_tree/decision_tree_probabilities_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c det.cpp -o det.o
In file included from decision_tree_train.cpp:9:
In file included from ../inst/include/mlpack/methods/decision_tree/decision_tree_train_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from decision_tree_train.cpp:9:
In file included from ../inst/include/mlpack/methods/decision_tree/decision_tree_train_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from decision_tree_train.cpp:9:
In file included from ../inst/include/mlpack/methods/decision_tree/decision_tree_train_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c emst.cpp -o emst.o
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c fastmks.cpp -o fastmks.o
In file included from det.cpp:9:
In file included from ../inst/include/mlpack/methods/det/det_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c gmm_generate.cpp -o gmm_generate.o
In file included from det.cpp:9:
In file included from ../inst/include/mlpack/methods/det/det_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from det.cpp:9:
In file included from ../inst/include/mlpack/methods/det/det_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from det.cpp:9:
In file included from ../inst/include/mlpack/methods/det/det_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from emst.cpp:9:
In file included from ../inst/include/mlpack/methods/emst/emst_main.cpp:27:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from fastmks.cpp:9:
In file included from ../inst/include/mlpack/methods/fastmks/fastmks_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from emst.cpp:9:
In file included from ../inst/include/mlpack/methods/emst/emst_main.cpp:27:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from emst.cpp:9:
In file included from ../inst/include/mlpack/methods/emst/emst_main.cpp:27:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from emst.cpp:9:
In file included from ../inst/include/mlpack/methods/emst/emst_main.cpp:27:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from gmm_generate.cpp:9:
In file included from ../inst/include/mlpack/methods/gmm/gmm_generate_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c gmm_probability.cpp -o gmm_probability.o
In file included from gmm_generate.cpp:9:
In file included from ../inst/include/mlpack/methods/gmm/gmm_generate_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from gmm_generate.cpp:9:
In file included from ../inst/include/mlpack/methods/gmm/gmm_generate_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from gmm_generate.cpp:9:
In file included from ../inst/include/mlpack/methods/gmm/gmm_generate_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c gmm_train.cpp -o gmm_train.o
In file included from fastmks.cpp:9:
In file included from ../inst/include/mlpack/methods/fastmks/fastmks_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from fastmks.cpp:9:
In file included from ../inst/include/mlpack/methods/fastmks/fastmks_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from fastmks.cpp:9:
In file included from ../inst/include/mlpack/methods/fastmks/fastmks_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
62 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c hmm_generate.cpp -o hmm_generate.o
In file included from gmm_probability.cpp:9:
In file included from ../inst/include/mlpack/methods/gmm/gmm_probability_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c hmm_loglik.cpp -o hmm_loglik.o
In file included from gmm_train.cpp:9:
In file included from ../inst/include/mlpack/methods/gmm/gmm_train_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from gmm_probability.cpp:9:
In file included from ../inst/include/mlpack/methods/gmm/gmm_probability_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from gmm_probability.cpp:9:
In file included from ../inst/include/mlpack/methods/gmm/gmm_probability_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from gmm_probability.cpp:9:
In file included from ../inst/include/mlpack/methods/gmm/gmm_probability_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from hmm_generate.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_generate_main.cpp:14:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from hmm_loglik.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_loglik_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from gmm_train.cpp:9:
In file included from ../inst/include/mlpack/methods/gmm/gmm_train_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from gmm_train.cpp:9:
In file included from ../inst/include/mlpack/methods/gmm/gmm_train_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from gmm_train.cpp:9:
In file included from ../inst/include/mlpack/methods/gmm/gmm_train_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c hmm_train.cpp -o hmm_train.o
In file included from hmm_generate.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_generate_main.cpp:14:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from hmm_generate.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_generate_main.cpp:14:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from hmm_generate.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_generate_main.cpp:14:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from hmm_loglik.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_loglik_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from hmm_loglik.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_loglik_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from hmm_loglik.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_loglik_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from hmm_train.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_train_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c hmm_viterbi.cpp -o hmm_viterbi.o
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c hoeffding_tree.cpp -o hoeffding_tree.o
In file included from hmm_train.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_train_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from hmm_train.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_train_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from hmm_train.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_train_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from hmm_viterbi.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_viterbi_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from hoeffding_tree.cpp:9:
In file included from ../inst/include/mlpack/methods/hoeffding_trees/hoeffding_tree_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from hmm_viterbi.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_viterbi_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from hmm_viterbi.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_viterbi_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from hmm_viterbi.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_viterbi_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c image_converter.cpp -o image_converter.o
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c kde.cpp -o kde.o
In file included from hoeffding_tree.cpp:9:
In file included from ../inst/include/mlpack/methods/hoeffding_trees/hoeffding_tree_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from hoeffding_tree.cpp:9:
In file included from ../inst/include/mlpack/methods/hoeffding_trees/hoeffding_tree_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from hoeffding_tree.cpp:9:
In file included from ../inst/include/mlpack/methods/hoeffding_trees/hoeffding_tree_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from image_converter.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/image_converter_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c kernel_pca.cpp -o kernel_pca.o
In file included from kde.cpp:9:
In file included from ../inst/include/mlpack/methods/kde/kde_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from image_converter.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/image_converter_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from image_converter.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/image_converter_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from image_converter.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/image_converter_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from kernel_pca.cpp:9:
In file included from ../inst/include/mlpack/methods/kernel_pca/kernel_pca_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from kernel_pca.cpp:9:
In file included from ../inst/include/mlpack/methods/kernel_pca/kernel_pca_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from kernel_pca.cpp:9:
In file included from ../inst/include/mlpack/methods/kernel_pca/kernel_pca_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from kernel_pca.cpp:9:
In file included from ../inst/include/mlpack/methods/kernel_pca/kernel_pca_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from kde.cpp:9:
In file included from ../inst/include/mlpack/methods/kde/kde_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from kde.cpp:9:
In file included from ../inst/include/mlpack/methods/kde/kde_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from kde.cpp:9:
In file included from ../inst/include/mlpack/methods/kde/kde_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
64 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c kfn.cpp -o kfn.o
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c kmeans.cpp -o kmeans.o
In file included from kfn.cpp:9:
In file included from ../inst/include/mlpack/methods/neighbor_search/kfn_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from kmeans.cpp:9:
In file included from ../inst/include/mlpack/methods/kmeans/kmeans_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c knn.cpp -o knn.o
67 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c krann.cpp -o krann.o
In file included from knn.cpp:9:
In file included from ../inst/include/mlpack/methods/neighbor_search/knn_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from kmeans.cpp:9:
In file included from ../inst/include/mlpack/methods/kmeans/kmeans_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from kmeans.cpp:9:
In file included from ../inst/include/mlpack/methods/kmeans/kmeans_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from kmeans.cpp:9:
In file included from ../inst/include/mlpack/methods/kmeans/kmeans_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from kfn.cpp:9:
In file included from ../inst/include/mlpack/methods/neighbor_search/kfn_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from kfn.cpp:9:
In file included from ../inst/include/mlpack/methods/neighbor_search/kfn_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from kfn.cpp:9:
In file included from ../inst/include/mlpack/methods/neighbor_search/kfn_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from krann.cpp:9:
In file included from ../inst/include/mlpack/methods/rann/krann_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from knn.cpp:9:
In file included from ../inst/include/mlpack/methods/neighbor_search/knn_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from knn.cpp:9:
In file included from ../inst/include/mlpack/methods/neighbor_search/knn_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from knn.cpp:9:
In file included from ../inst/include/mlpack/methods/neighbor_search/knn_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from krann.cpp:9:
In file included from ../inst/include/mlpack/methods/rann/krann_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from krann.cpp:9:
In file included from ../inst/include/mlpack/methods/rann/krann_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from krann.cpp:9:
In file included from ../inst/include/mlpack/methods/rann/krann_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c lars.cpp -o lars.o
In file included from lars.cpp:9:
In file included from ../inst/include/mlpack/methods/lars/lars_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from lars.cpp:9:
In file included from ../inst/include/mlpack/methods/lars/lars_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from lars.cpp:9:
In file included from ../inst/include/mlpack/methods/lars/lars_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from lars.cpp:9:
In file included from ../inst/include/mlpack/methods/lars/lars_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c lars_predict.cpp -o lars_predict.o
In file included from lars_predict.cpp:9:
In file included from ../inst/include/mlpack/methods/lars/lars_predict_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c lars_train.cpp -o lars_train.o
In file included from lars_predict.cpp:9:
In file included from ../inst/include/mlpack/methods/lars/lars_predict_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from lars_predict.cpp:9:
In file included from ../inst/include/mlpack/methods/lars/lars_predict_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from lars_predict.cpp:9:
In file included from ../inst/include/mlpack/methods/lars/lars_predict_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c linear_regression.cpp -o linear_regression.o
In file included from lars_train.cpp:9:
In file included from ../inst/include/mlpack/methods/lars/lars_train_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c linear_regression_predict.cpp -o linear_regression_predict.o
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c linear_regression_train.cpp -o linear_regression_train.o
In file included from linear_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from lars_train.cpp:9:
In file included from ../inst/include/mlpack/methods/lars/lars_train_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from lars_train.cpp:9:
In file included from ../inst/include/mlpack/methods/lars/lars_train_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from lars_train.cpp:9:
In file included from ../inst/include/mlpack/methods/lars/lars_train_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from linear_regression_predict.cpp:9:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression_predict_main.cpp:20:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression.hpp:283:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from linear_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from linear_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from linear_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from linear_regression_train.cpp:9:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression_train_main.cpp:20:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression.hpp:283:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c linear_svm.cpp -o linear_svm.o
In file included from linear_regression_predict.cpp:9:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression_predict_main.cpp:20:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression.hpp:283:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from linear_regression_predict.cpp:9:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression_predict_main.cpp:20:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression.hpp:283:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from linear_regression_predict.cpp:9:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression_predict_main.cpp:20:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression.hpp:283:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from linear_regression_train.cpp:9:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression_train_main.cpp:20:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression.hpp:283:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from linear_regression_train.cpp:9:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression_train_main.cpp:20:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression.hpp:283:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from linear_regression_train.cpp:9:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression_train_main.cpp:20:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression.hpp:283:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c lmnn.cpp -o lmnn.o
In file included from linear_svm.cpp:9:
In file included from ../inst/include/mlpack/methods/linear_svm/linear_svm_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c local_coordinate_coding.cpp -o local_coordinate_coding.o
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c logistic_regression.cpp -o logistic_regression.o
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c logistic_regression_classify.cpp -o logistic_regression_classify.o
In file included from linear_svm.cpp:9:
In file included from ../inst/include/mlpack/methods/linear_svm/linear_svm_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from linear_svm.cpp:9:
In file included from ../inst/include/mlpack/methods/linear_svm/linear_svm_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from linear_svm.cpp:9:
In file included from ../inst/include/mlpack/methods/linear_svm/linear_svm_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from lmnn.cpp:9:
In file included from ../inst/include/mlpack/methods/lmnn/lmnn_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c logistic_regression_probabilities.cpp -o logistic_regression_probabilities.o
In file included from local_coordinate_coding.cpp:9:
In file included from ../inst/include/mlpack/methods/local_coordinate_coding/local_coordinate_coding_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from logistic_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/logistic_regression/logistic_regression_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from logistic_regression_classify.cpp:9:
In file included from ../inst/include/mlpack/methods/logistic_regression/logistic_regression_classify_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from lmnn.cpp:9:
In file included from ../inst/include/mlpack/methods/lmnn/lmnn_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from lmnn.cpp:9:
In file included from ../inst/include/mlpack/methods/lmnn/lmnn_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from lmnn.cpp:9:
In file included from ../inst/include/mlpack/methods/lmnn/lmnn_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from local_coordinate_coding.cpp:9:
In file included from ../inst/include/mlpack/methods/local_coordinate_coding/local_coordinate_coding_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from local_coordinate_coding.cpp:9:
In file included from ../inst/include/mlpack/methods/local_coordinate_coding/local_coordinate_coding_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from local_coordinate_coding.cpp:9:
In file included from ../inst/include/mlpack/methods/local_coordinate_coding/local_coordinate_coding_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from logistic_regression_classify.cpp:9:
In file included from ../inst/include/mlpack/methods/logistic_regression/logistic_regression_classify_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from logistic_regression_classify.cpp:9:
In file included from ../inst/include/mlpack/methods/logistic_regression/logistic_regression_classify_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from logistic_regression_classify.cpp:9:
In file included from ../inst/include/mlpack/methods/logistic_regression/logistic_regression_classify_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from logistic_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/logistic_regression/logistic_regression_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from logistic_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/logistic_regression/logistic_regression_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from logistic_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/logistic_regression/logistic_regression_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from logistic_regression_probabilities.cpp:9:
In file included from ../inst/include/mlpack/methods/logistic_regression/logistic_regression_probabilities_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from logistic_regression_probabilities.cpp:9:
In file included from ../inst/include/mlpack/methods/logistic_regression/logistic_regression_probabilities_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from logistic_regression_probabilities.cpp:9:
In file included from ../inst/include/mlpack/methods/logistic_regression/logistic_regression_probabilities_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from logistic_regression_probabilities.cpp:9:
In file included from ../inst/include/mlpack/methods/logistic_regression/logistic_regression_probabilities_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c logistic_regression_train.cpp -o logistic_regression_train.o
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c lsh.cpp -o lsh.o
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c mean_shift.cpp -o mean_shift.o
In file included from logistic_regression_train.cpp:9:
In file included from ../inst/include/mlpack/methods/logistic_regression/logistic_regression_train_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from lsh.cpp:9:
In file included from ../inst/include/mlpack/methods/lsh/lsh_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c nbc.cpp -o nbc.o
In file included from mean_shift.cpp:9:
In file included from ../inst/include/mlpack/methods/mean_shift/mean_shift_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c nca.cpp -o nca.o
In file included from logistic_regression_train.cpp:9:
In file included from ../inst/include/mlpack/methods/logistic_regression/logistic_regression_train_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from logistic_regression_train.cpp:9:
In file included from ../inst/include/mlpack/methods/logistic_regression/logistic_regression_train_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from logistic_regression_train.cpp:9:
In file included from ../inst/include/mlpack/methods/logistic_regression/logistic_regression_train_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c nmf.cpp -o nmf.o
In file included from lsh.cpp:9:
In file included from ../inst/include/mlpack/methods/lsh/lsh_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from lsh.cpp:9:
In file included from ../inst/include/mlpack/methods/lsh/lsh_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from lsh.cpp:9:
In file included from ../inst/include/mlpack/methods/lsh/lsh_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from mean_shift.cpp:9:
In file included from ../inst/include/mlpack/methods/mean_shift/mean_shift_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from mean_shift.cpp:9:
In file included from ../inst/include/mlpack/methods/mean_shift/mean_shift_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from mean_shift.cpp:9:
In file included from ../inst/include/mlpack/methods/mean_shift/mean_shift_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from nbc.cpp:9:
In file included from ../inst/include/mlpack/methods/naive_bayes/nbc_main.cpp:15:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from nca.cpp:9:
In file included from ../inst/include/mlpack/methods/nca/nca_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from nmf.cpp:9:
In file included from ../inst/include/mlpack/methods/nmf/nmf_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from nbc.cpp:9:
In file included from ../inst/include/mlpack/methods/naive_bayes/nbc_main.cpp:15:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from nbc.cpp:9:
In file included from ../inst/include/mlpack/methods/naive_bayes/nbc_main.cpp:15:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from nbc.cpp:9:
In file included from ../inst/include/mlpack/methods/naive_bayes/nbc_main.cpp:15:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from nca.cpp:9:
In file included from ../inst/include/mlpack/methods/nca/nca_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from nca.cpp:9:
In file included from ../inst/include/mlpack/methods/nca/nca_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from nca.cpp:9:
In file included from ../inst/include/mlpack/methods/nca/nca_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c pca.cpp -o pca.o
In file included from nmf.cpp:9:
In file included from ../inst/include/mlpack/methods/nmf/nmf_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from nmf.cpp:9:
In file included from ../inst/include/mlpack/methods/nmf/nmf_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from nmf.cpp:9:
In file included from ../inst/include/mlpack/methods/nmf/nmf_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c perceptron.cpp -o perceptron.o
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c preprocess_binarize.cpp -o preprocess_binarize.o
In file included from pca.cpp:9:
In file included from ../inst/include/mlpack/methods/pca/pca_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c preprocess_describe.cpp -o preprocess_describe.o
In file included from perceptron.cpp:9:
In file included from ../inst/include/mlpack/methods/perceptron/perceptron_main.cpp:15:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c preprocess_one_hot_encoding.cpp -o preprocess_one_hot_encoding.o
In file included from preprocess_binarize.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_binarize_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c preprocess_scale.cpp -o preprocess_scale.o
In file included from pca.cpp:9:
In file included from ../inst/include/mlpack/methods/pca/pca_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from pca.cpp:9:
In file included from ../inst/include/mlpack/methods/pca/pca_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from pca.cpp:9:
In file included from ../inst/include/mlpack/methods/pca/pca_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from perceptron.cpp:9:
In file included from ../inst/include/mlpack/methods/perceptron/perceptron_main.cpp:15:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from perceptron.cpp:9:
In file included from ../inst/include/mlpack/methods/perceptron/perceptron_main.cpp:15:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from perceptron.cpp:9:
In file included from ../inst/include/mlpack/methods/perceptron/perceptron_main.cpp:15:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from preprocess_binarize.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_binarize_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from preprocess_binarize.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_binarize_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from preprocess_binarize.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_binarize_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from preprocess_describe.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_describe_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from preprocess_one_hot_encoding.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_one_hot_encoding_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from preprocess_scale.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_scale_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from preprocess_describe.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_describe_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from preprocess_describe.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_describe_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from preprocess_describe.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_describe_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from preprocess_one_hot_encoding.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_one_hot_encoding_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from preprocess_one_hot_encoding.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_one_hot_encoding_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from preprocess_one_hot_encoding.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_one_hot_encoding_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c preprocess_split.cpp -o preprocess_split.o
In file included from preprocess_scale.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_scale_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from preprocess_scale.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_scale_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from preprocess_scale.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_scale_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c r_util.cpp -o r_util.o
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c radical.cpp -o radical.o
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c random_forest.cpp -o random_forest.o
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c random_forest_classify.cpp -o random_forest_classify.o
In file included from preprocess_split.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_split_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from radical.cpp:9:
In file included from ../inst/include/mlpack/methods/radical/radical_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from preprocess_split.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_split_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from preprocess_split.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_split_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from preprocess_split.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_split_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from random_forest.cpp:9:
In file included from ../inst/include/mlpack/methods/random_forest/random_forest_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from random_forest_classify.cpp:9:
In file included from ../inst/include/mlpack/methods/random_forest/random_forest_classify_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from radical.cpp:9:
In file included from ../inst/include/mlpack/methods/radical/radical_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from radical.cpp:9:
In file included from ../inst/include/mlpack/methods/radical/radical_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from radical.cpp:9:
In file included from ../inst/include/mlpack/methods/radical/radical_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c random_forest_probabilities.cpp -o random_forest_probabilities.o
In file included from random_forest_classify.cpp:9:
In file included from ../inst/include/mlpack/methods/random_forest/random_forest_classify_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from random_forest_classify.cpp:9:
In file included from ../inst/include/mlpack/methods/random_forest/random_forest_classify_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from random_forest_classify.cpp:9:
In file included from ../inst/include/mlpack/methods/random_forest/random_forest_classify_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
68 warnings generated.
In file included from random_forest.cpp:9:
In file included from ../inst/include/mlpack/methods/random_forest/random_forest_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from random_forest.cpp:9:
In file included from ../inst/include/mlpack/methods/random_forest/random_forest_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from random_forest.cpp:9:
In file included from ../inst/include/mlpack/methods/random_forest/random_forest_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c random_forest_train.cpp -o random_forest_train.o
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c softmax_regression.cpp -o softmax_regression.o
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c sparse_coding.cpp -o sparse_coding.o
In file included from random_forest_probabilities.cpp:9:
In file included from ../inst/include/mlpack/methods/random_forest/random_forest_probabilities_main.cpp:14:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include' -I/opt/R/x86_64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2   -c test_r_binding.cpp -o test_r_binding.o
In file included from random_forest_train.cpp:9:
In file included from ../inst/include/mlpack/methods/random_forest/random_forest_train_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from random_forest_probabilities.cpp:9:
In file included from ../inst/include/mlpack/methods/random_forest/random_forest_probabilities_main.cpp:14:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from random_forest_probabilities.cpp:9:
In file included from ../inst/include/mlpack/methods/random_forest/random_forest_probabilities_main.cpp:14:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from random_forest_probabilities.cpp:9:
In file included from ../inst/include/mlpack/methods/random_forest/random_forest_probabilities_main.cpp:14:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from random_forest_train.cpp:9:
In file included from ../inst/include/mlpack/methods/random_forest/random_forest_train_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from random_forest_train.cpp:9:
In file included from ../inst/include/mlpack/methods/random_forest/random_forest_train_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from random_forest_train.cpp:9:
In file included from ../inst/include/mlpack/methods/random_forest/random_forest_train_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from softmax_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/softmax_regression/softmax_regression_main.cpp:11:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
In file included from sparse_coding.cpp:9:
In file included from ../inst/include/mlpack/methods/sparse_coding/sparse_coding_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:69:
In file included from ../inst/include/mlpack/core/hpt/hpt.hpp:18:
In file included from /Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen.hpp:115:
/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/RcppEnsmallen/include/ensmallen_bits/aug_lagrangian/aug_lagrangian.hpp:124:16: warning: unused variable 'result' [-Wunused-variable]
    const bool result = Optimize(function, coordinates, this->deprecatedLambda,
               ^
68 warnings generated.
68 warnings generated.
In file included from softmax_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/softmax_regression/softmax_regression_main.cpp:11:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from softmax_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/softmax_regression/softmax_regression_main.cpp:11:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from softmax_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/softmax_regression/softmax_regression_main.cpp:11:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
In file included from sparse_coding.cpp:9:
In file included from ../inst/include/mlpack/methods/sparse_coding/sparse_coding_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:40:
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:587:16: warning: unused function 'drmp3_version' [-Wunused-function]
DRMP3_API void drmp3_version(drmp3_uint32* pMajor, drmp3_uint32* pMinor, drmp3_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:602:23: warning: unused function 'drmp3_version_string' [-Wunused-function]
DRMP3_API const char* drmp3_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:2388:16: warning: unused function 'drmp3dec_f32_to_s16' [-Wunused-function]
DRMP3_API void drmp3dec_f32_to_s16(const float *in, drmp3_int16 *out, size_t num_samples)
               ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4057:24: warning: unused function 'drmp3_init_file_w' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_init_file_w(drmp3* pMP3, const wchar_t* pFilePath, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4526:24: warning: 'static' function 'drmp3_get_pcm_frame_count' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRMP3_API drmp3_uint64 drmp3_get_pcm_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4560:24: warning: unused function 'drmp3_get_mp3_frame_count' [-Wunused-function]
DRMP3_API drmp3_uint64 drmp3_get_mp3_frame_count(drmp3* pMP3)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4591:24: warning: unused function 'drmp3_calculate_seek_points' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_calculate_seek_points(drmp3* pMP3, drmp3_uint32* pSeekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4731:24: warning: unused function 'drmp3_bind_seek_table' [-Wunused-function]
DRMP3_API drmp3_bool32 drmp3_bind_seek_table(drmp3* pMP3, drmp3_uint32 seekPointCount, drmp3_seek_point* pSeekPoints)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4890:18: warning: unused function 'drmp3_open_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_and_read_pcm_frames_f32(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4900:24: warning: unused function 'drmp3_open_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_and_read_pcm_frames_s16(drmp3_read_proc onRead, drmp3_seek_proc onSeek, drmp3_tell_proc onTell, void* pUserData, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4911:18: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_memory_and_read_pcm_frames_f32(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4921:24: warning: unused function 'drmp3_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_memory_and_read_pcm_frames_s16(const void* pData, size_t dataSize, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4933:18: warning: unused function 'drmp3_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRMP3_API float* drmp3_open_file_and_read_pcm_frames_f32(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_mp3.h:4943:24: warning: unused function 'drmp3_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRMP3_API drmp3_int16* drmp3_open_file_and_read_pcm_frames_s16(const char* filePath, drmp3_config* pConfig, drmp3_uint64* pTotalFrameCount, const drmp3_allocation_callbacks* pAllocationCallbacks)
                       ^
In file included from sparse_coding.cpp:9:
In file included from ../inst/include/mlpack/methods/sparse_coding/sparse_coding_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:38:
In file included from ../inst/include/mlpack/core/audio/audio.hpp:68:
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1476:16: warning: unused function 'drwav_version' [-Wunused-function]
DRWAV_API void drwav_version(drwav_uint32* pMajor, drwav_uint32* pMinor, drwav_uint32* pRevision)
               ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:1491:23: warning: unused function 'drwav_version_string' [-Wunused-function]
DRWAV_API const char* drwav_version_string(void)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3019:24: warning: unused function 'drwav_fmt_get_format' [-Wunused-function]
DRWAV_API drwav_uint16 drwav_fmt_get_format(const drwav_fmt* pFMT)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3891:24: warning: unused function 'drwav_init_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_with_metadata(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4636:24: warning: unused function 'drwav_init_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4654:24: warning: unused function 'drwav_init_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_sequential_pcm_frames(drwav* pWav, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, drwav_write_proc onWrite, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4663:24: warning: unused function 'drwav_init_write_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_write_with_metadata(drwav* pWav, const drwav_data_format* pFormat, drwav_write_proc onWrite, drwav_seek_proc onSeek, void* pUserData, const drwav_allocation_callbacks* pAllocationCallbacks, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:4676:24: warning: unused function 'drwav_target_write_size_bytes' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_target_write_size_bytes(const drwav_data_format* pFormat, drwav_uint64 totalFrameCount, drwav_metadata* pMetadata, drwav_uint32 metadataCount)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:3900:27: warning: unused function 'drwav_take_ownership_of_metadata' [-Wunused-function]
DRWAV_API drwav_metadata* drwav_take_ownership_of_metadata(drwav* pWav)
                          ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5997:24: warning: unused function 'drwav_seek_to_pcm_frame' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_seek_to_pcm_frame(drwav* pWav, drwav_uint64 targetFrameIndex)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6107:24: warning: unused function 'drwav_get_cursor_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_cursor_in_pcm_frames(drwav* pWav, drwav_uint64* pCursor)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6124:24: warning: unused function 'drwav_get_length_in_pcm_frames' [-Wunused-function]
DRWAV_API drwav_result drwav_get_length_in_pcm_frames(drwav* pWav, drwav_uint64* pLength)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:6253:24: warning: unused function 'drwav_write_pcm_frames' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_write_pcm_frames(drwav* pWav, drwav_uint64 framesToWrite, const void* pData)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7012:24: warning: unused function 'drwav_read_pcm_frames_s16le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16le(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7022:24: warning: unused function 'drwav_read_pcm_frames_s16be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s16be(drwav* pWav, drwav_uint64 framesToRead, drwav_int16* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7465:24: warning: unused function 'drwav_read_pcm_frames_f32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32le(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7475:24: warning: unused function 'drwav_read_pcm_frames_f32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_f32be(drwav* pWav, drwav_uint64 framesToRead, float* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7948:24: warning: unused function 'drwav_read_pcm_frames_s32le' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32le(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:7958:24: warning: unused function 'drwav_read_pcm_frames_s32be' [-Wunused-function]
DRWAV_API drwav_uint64 drwav_read_pcm_frames_s32be(drwav* pWav, drwav_uint64 framesToRead, drwav_int32* pBufferOut)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5367:24: warning: unused function 'drwav_init_file_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata(drwav* pWav, const char* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5379:24: warning: unused function 'drwav_init_file_with_metadata_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_with_metadata_w(drwav* pWav, const wchar_t* filename, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5435:24: warning: 'static' function 'drwav_init_file_write' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
DRWAV_API drwav_bool32 drwav_init_file_write(drwav* pWav, const char* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5445:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames(drwav* pWav, const char* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5455:24: warning: unused function 'drwav_init_file_write_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5465:24: warning: unused function 'drwav_init_file_write_sequential_pcm_frames_w' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_file_write_sequential_pcm_frames_w(drwav* pWav, const wchar_t* filename, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5635:24: warning: unused function 'drwav_init_memory_with_metadata' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_with_metadata(drwav* pWav, const void* data, size_t dataSize, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5675:24: warning: unused function 'drwav_init_memory_write' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:5685:24: warning: unused function 'drwav_init_memory_write_sequential_pcm_frames' [-Wunused-function]
DRWAV_API drwav_bool32 drwav_init_memory_write_sequential_pcm_frames(drwav* pWav, void** ppData, size_t* pDataSize, const drwav_data_format* pFormat, drwav_uint64 totalPCMFrameCount, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8213:24: warning: unused function 'drwav_open_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_and_read_pcm_frames_s16(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8234:18: warning: unused function 'drwav_open_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_and_read_pcm_frames_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8255:24: warning: unused function 'drwav_open_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_and_read_pcm_frames_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, drwav_tell_proc onTell, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8277:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8298:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8319:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8342:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s16_w' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_file_and_read_pcm_frames_s16_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8363:18: warning: unused function 'drwav_open_file_and_read_pcm_frames_f32_w' [-Wunused-function]
DRWAV_API float* drwav_open_file_and_read_pcm_frames_f32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8384:24: warning: unused function 'drwav_open_file_and_read_pcm_frames_s32_w' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_file_and_read_pcm_frames_s32_w(const wchar_t* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8407:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s16' [-Wunused-function]
DRWAV_API drwav_int16* drwav_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8428:18: warning: unused function 'drwav_open_memory_and_read_pcm_frames_f32' [-Wunused-function]
DRWAV_API float* drwav_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                 ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8449:24: warning: unused function 'drwav_open_memory_and_read_pcm_frames_s32' [-Wunused-function]
DRWAV_API drwav_int32* drwav_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drwav_uint64* totalFrameCountOut, const drwav_allocation_callbacks* pAllocationCallbacks)
                       ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8507:23: warning: unused function 'drwav_bytes_to_s32' [-Wunused-function]
DRWAV_API drwav_int32 drwav_bytes_to_s32(const drwav_uint8* data)
                      ^
../inst/include/mlpack/core/audio/bundled/dr_wav.h:8519:23: warning: unused function 'drwav_bytes_to_s64' [-Wunused-function]
DRWAV_API drwav_int64 drwav_bytes_to_s64(const drwav_uint8* data)
                      ^
In file included from sparse_coding.cpp:9:
In file included from ../inst/include/mlpack/methods/sparse_coding/sparse_coding_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:39:
In file included from ../inst/include/mlpack/core/stb/stb.hpp:80:
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1215:14: warning: 'static' function 'stbi_write_png' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:520:14: warning: 'static' function 'stbi_write_bmp' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:619:14: warning: 'static' function 'stbi_write_tga' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:794:14: warning: unused function 'stbi_write_hdr' [-Wunused-function]
STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1616:14: warning: 'static' function 'stbi_write_jpg' declared in header file should be declared 'static inline' [-Wunneeded-internal-declaration]
STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1231:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:512:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:611:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:787:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:1607:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/mlpack/core/stb/bundled/stb_image_write.h:262:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
68 warnings generated.
68 warnings generated.
68 warnings generated.
clang++ -arch x86_64 -std=gnu++20 -dynamiclib -Wl,-headerpad_max_install_names -undefined dynamic_lookup -L/Library/Frameworks/R.framework/Resources/lib -L/opt/R/x86_64/lib -o mlpack.so RcppExports.o adaboost.o adaboost_classify.o adaboost_probabilities.o adaboost_train.o approx_kfn.o bayesian_linear_regression.o bayesian_linear_regression_predict.o bayesian_linear_regression_train.o cf.o dbscan.o decision_tree.o decision_tree_classify.o decision_tree_probabilities.o decision_tree_train.o det.o emst.o fastmks.o gmm_generate.o gmm_probability.o gmm_train.o hmm_generate.o hmm_loglik.o hmm_train.o hmm_viterbi.o hoeffding_tree.o image_converter.o kde.o kernel_pca.o kfn.o kmeans.o knn.o krann.o lars.o lars_predict.o lars_train.o linear_regression.o linear_regression_predict.o linear_regression_train.o linear_svm.o lmnn.o local_coordinate_coding.o logistic_regression.o logistic_regression_classify.o logistic_regression_probabilities.o logistic_regression_train.o lsh.o mean_shift.o nbc.o nca.o nmf.o pca.o perceptron.o preprocess_binarize.o preprocess_describe.o preprocess_one_hot_encoding.o preprocess_scale.o preprocess_split.o r_util.o radical.o random_forest.o random_forest_classify.o random_forest_probabilities.o random_forest_train.o softmax_regression.o sparse_coding.o test_r_binding.o -L/Library/Frameworks/R.framework/Resources/lib -lRlapack -L/Library/Frameworks/R.framework/Resources/lib -lRblas -L/opt/gfortran/lib/gcc/x86_64-apple-darwin20.0/14.2.0 -L/opt/gfortran/lib -lemutls_w -lheapt_w -lgfortran -lquadmath -F/Library/Frameworks/R.framework/.. -framework R
installing to /Volumes/Builds/packages/big-sur-x86_64/results/4.6/mlpack.Rcheck/00LOCK-mlpack/00new/mlpack/libs
** generating debug symbols (dSYM)
** R
** inst
** byte-compile and prepare package for lazy loading
** help
*** installing help indices
** building package indices
** testing if installed package can be loaded from temporary location
** checking absolute paths in shared objects and dynamic libraries
** testing if installed package can be loaded from final location
** testing if installed package keeps a record of temporary installation path
* DONE (mlpack)