(I replied earlier but that seems to have gotten lost. Apologies to anybody who may receive two copies, and thanks to Simon for his answer. -- Dirk)
On 9 August 2021 at 17:04, Naeem Khoshnevis wrote: | Do you know a workaround for this issue? Wrap the #include by #ifdef _OPENMP and #endif Test for presence of OpenMP (for example via a configure script). Use the standard R compilation flags. RcppArmadillo uses PKG_CXXFLAGS = -I../inst/include @OPENMP_FLAG@ PKG_LIBS= @OPENMP_FLAG@ $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS) where @OPENMP_FLAG@ gets set if OpenMP is found. Other packages just use PKG_CXXFLAGS = $(SHLIB_OPENMP_CXXFLAGS) PKG_LIBS = $(SHLIB_OPENMP_CXXFLAGS) $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS) relying on R which sets SHLIB_OPENMP_CXXFLAGS. Dirk -- https://dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org _______________________________________________ Rcpp-devel mailing list Rcpp-devel@lists.r-forge.r-project.org https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
