On Sun, Aug 28, 2016 at 2:01 PM, K. Macy <km...@freebsd.org> wrote: >>> >> >> With 11, one can even simply install devel/openmp which will only install >> the libopenmp bits from llvm, and after that, base cc can do openmp. > > This isn't really useful unless the clang in base knows where to find > libomp. Considering that even the devel/llvm ports aren't configured > properly for that I don't see -fopenmp working. Without patching > makefiles or configure. So although this is better than having to > installing a complete copy of the compiler for the sake of a single > library it's still forcing FreeBSD users to jump through extra hoops > that they don't have to with gcc or on other platforms.
I just tried this on Ubuntu and it looks like even there clang doesn't invoke ld correctly to make -fopenmp work. Both icc and gcc do this automatically. Thus I wonder if anyone is actually using openmp in earnest with clang. mmacy@pandemonium:~$ clang++ -fopenmp omp.cpp /usr/bin/ld: cannot find -liomp5 clang-3.5: error: linker command failed with exit code 1 (use -v to see invocation) mmacy@pandemonium:~$ clang++-3.8 -fopenmp omp.cpp /usr/bin/ld: cannot find -lomp clang: error: linker command failed with exit code 1 (use -v to see invocation) mmacy@pandemonium:~$ g++ -fopenmp omp.cpp mmacy@pandemonium:~$ g++-4.9 -fopenmp omp.cpp mmacy@pandemonium:~$ -M _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
