Found the following significant warnings:
  pcg_basic.c:69:22: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  solver_test.cpp:47:24: warning: variable 'seed' is uninitialized when used here [-Wuninitialized]
  train_regression_stump.cpp:114:24: warning: variable 'seed' is uninitialized when used here [-Wuninitialized]
See ‘/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/RGBM.Rcheck/00install.out’ for details.
* used C compiler: ‘Debian clang version 15.0.6’
* used C++ compiler: ‘Debian clang version 15.0.6’
Found the following significant warnings:
  pcg_basic.c:69:22: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  solver_test.cpp:47:24: warning: variable 'seed' is uninitialized when used here [-Wuninitialized]
  train_regression_stump.cpp:114:24: warning: variable 'seed' is uninitialized when used here [-Wuninitialized]
See ‘/data/gannet/ripley/R/packages/tests-clang/RGBM.Rcheck/00install.out’ for details.
* used C compiler: ‘clang version 16.0.0’
* used C++ compiler: ‘clang version 16.0.0’

Package required but not available: ‘GMMAT’

See section ‘The DESCRIPTION file’ in the ‘Writing R Extensions’
manual.

Running ‘testthat.R’ [11s/29s]
Running the tests in ‘tests/testthat.R’ failed.
Last 13 lines of output:
  Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
  
  Residual standard error: 4.038 on 21 degrees of freedom
  Multiple R-squared:  0.02316,	Adjusted R-squared:  -0.02336 
  F-statistic: 0.4979 on 1 and 21 DF,  p-value: 0.4882
  
  [ FAIL 1 | WARN 0 | SKIP 0 | PASS 100 ]
  
  ══ Failed tests ════════════════════════════════════════════════════════════════
  ── Failure ('test_plot.QA.R:31:3'): QA and plot.QA work ────────────────────────
  `plot.QA(qa1, outDir = tempdir())` produced warnings.
  
  [ FAIL 1 | WARN 0 | SKIP 0 | PASS 100 ]
  Error: Test failures
  Execution halted

Installation failed.
See ‘/Volumes/Builds/packages/big-sur-arm64/results/4.2/HDPenReg.Rcheck/00install.out’ for details.
installed size is 11.7Mb
  sub-directories of 1Mb or more:
    libs  11.2Mb
installed size is 15.3Mb
  sub-directories of 1Mb or more:
    libs  14.9Mb
installed size is 11.7Mb
  sub-directories of 1Mb or more:
    libs  11.2Mb