* installing *source* package ‘hdbcp’ ...
** using staged installation
** libs
using C++ compiler: ‘Debian clang version 19.1.3 (2)’
clang++-19  -std=gnu++17 -I"/home/hornik/tmp/R-d-clang-19/include" -DNDEBUG  -I'/home/hornik/lib/R/Library/4.5/x86_64-linux-gnu/Rcpp/include' -I'/home/hornik/lib/R/Library/4.5/x86_64-linux-gnu/RcppArmadillo/include' -I/usr/local/include -DUSE_TYPE_CHECKING_STRICT -D_FORTIFY_SOURCE=3   -fpic  -g -O3 -Wall -pedantic -DR_NO_REMAP -c RcppExports.cpp -o RcppExports.o
clang++-19  -std=gnu++17 -I"/home/hornik/tmp/R-d-clang-19/include" -DNDEBUG  -I'/home/hornik/lib/R/Library/4.5/x86_64-linux-gnu/Rcpp/include' -I'/home/hornik/lib/R/Library/4.5/x86_64-linux-gnu/RcppArmadillo/include' -I/usr/local/include -DUSE_TYPE_CHECKING_STRICT -D_FORTIFY_SOURCE=3   -fpic  -g -O3 -Wall -pedantic -DR_NO_REMAP -c cpp_cov_mxPBF.cpp -o cpp_cov_mxPBF.o
cpp_cov_mxPBF.cpp:238:17: error: use of undeclared identifier 'omp_get_max_threads'
  238 |     n_threads = omp_get_max_threads() - 1;
      |                 ^
1 error generated.
make: *** [/home/hornik/tmp/R-d-clang-19/etc/Makeconf:202: cpp_cov_mxPBF.o] Error 1
ERROR: compilation failed for package ‘hdbcp’
* removing ‘/srv/hornik/tmp/CRAN_pretest/hdbcp.Rcheck/hdbcp’