* installing *source* package ‘fru’ ...
** package ‘fru’ successfully unpacked and MD5 sums checked
** using staged installation
cargo 1.91.1 (ea2d97820 2025-10-10)
rustc 1.91.1 (ed61e7d7e 2025-11-07)
** libs
using C compiler: ‘Apple clang version 14.0.3 (clang-1403.0.22.14.1)’
using SDK: ‘MacOSX11.3.sdk’
clang -arch arm64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -DSTRICT_R_HEADERS -DR_NO_REMAP  -I/opt/R/arm64/include    -fPIC  -falign-functions=64 -Wall -g -O2  -c wrapper.c -o wrapper.o
mkdir -p /Volumes/Builds/packages/big-sur-arm64/results/4.4/fru.Rcheck/00_pkg_src/fru/src/.cargo
PATH="/opt/gfortran/bin:/opt/R/arm64/bin:/Library/TeX/texbin:/usr/texbin:/opt/R/arm64/gfortran/bin:/usr/local/bin:/usr/local/gfortran/bin:/usr/local/teTeX/bin/arm64-apple-darwin-current:/Library/Frameworks/R.framework/Resources/bin:/opt/gfortran/bin:/opt/R/arm64/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/rbuild/.cargo/bin" cargo build --offline --release -j 2 --manifest-path=fru/Cargo.toml
wrapper.c:110:12: error: call to undeclared function 'Rf_asBool'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  bool nrm=Rf_asBool(sNormalise);
           ^
wrapper.c:110:12: note: did you mean 'Rf_asReal'?
/Library/Frameworks/R.framework/Resources/include/Rinternals.h:471:8: note: 'Rf_asReal' declared here
double Rf_asReal(SEXP x);
       ^
wrapper.c:133:24: error: call to undeclared function 'Rf_asBool'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  bool make_importance=Rf_asBool(sImportance);
                       ^
2 errors generated.
make: *** [wrapper.o] Error 1
make: *** Waiting for unfinished jobs....
warning: a `-j` argument was passed to Cargo but Cargo is also configured with an external jobserver in its environment, ignoring the `-j` parameter
     Locking 1 package to latest Rust 1.91.1 compatible version
      Adding xrf v0.1.3 (/Volumes/Builds/packages/big-sur-arm64/results/4.4/fru.Rcheck/00_pkg_src/fru/src/xrf)
   Compiling xrf v0.1.3 (/Volumes/Builds/packages/big-sur-arm64/results/4.4/fru.Rcheck/00_pkg_src/fru/src/xrf)
   Compiling fru v0.1.0 (/Volumes/Builds/packages/big-sur-arm64/results/4.4/fru.Rcheck/00_pkg_src/fru/src/fru)
    Finished `release` profile [optimized] target(s) in 6.06s
rm -Rf /Volumes/Builds/packages/big-sur-arm64/results/4.4/fru.Rcheck/00_pkg_src/fru/src/.cargo
rm -Rf fru/target/release/build 
ERROR: compilation failed for package ‘fru’
* removing ‘/Volumes/Builds/packages/big-sur-arm64/results/4.4/fru.Rcheck/fru’