add openmp and libc++ to clang #9478
Description
In my clang installation I used this
cmake -S llvm -B build -G Ninja -DLLVM_ENABLE_PROJECTS="clang;clang-tools-extra;compiler-rt;openmp" -DLLVM_ENABLE_RUNTIMES="libcxx;libcxxabi;libunwind" -DCMAKE_INSTALL_PREFIX=/afs/cern.ch/user/i/innocent/w5/
ninja -j 8 -k 1024 -C build
ninja install -C build
and managed to use openmp and libc++
clang++ test.cc -o sample -fopenmp -stdlib=libstd++ -v
clang++ test.cc -o sample -fopenmp -stdlib=libc++ -v
even compiling for gpu target...
clang++ --offload-arch=native -xhip testGPU.cc -o sample -fopenmp -v -stdlib=libc++ -std=c++20 > & /dev/null ; ./sample
clang++ --offload-arch=native -xhip testGPU.cc -o sample -fopenmp -v -stdlib=libstdc++ -std=c++20 > & /dev/null ; ./sample
the latter uses the "system" gcc (well the one I used to build clang) not a random local one as hip does...
it could be useful to have it in cmsdist if anybody else is interested