I want to install OpenMP in my MacOS system, and there are plenty of tutorials about how to install OpenMP. Unfortunately, most of them cannot work on my computer. We I try to use brew reinstall gcc --without-multilib ,the --without-multilib Option seems not be well supported.
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Warning: gcc: this formula has no --without-multilib option so it will be ignored! |
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brew options gcc --with-jit Build just-in-time compiler --with-nls Build with native language support (localization) --HEAD Install HEAD version |
I still do not know why this happens, may be caused by the newer MacOS, but we can use another approach mentions in Clang + OpenMP Setup in macOS
Firstly, we use brew install llvm to install llvm. In my system clang & clang++ was installed into /usr/local/opt/llvm/bin and be overlapped by original clang , We use the soft link to create an alias of new clang.
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ln -s /usr/local/opt/llvm/bin/clang /usr/local/bin/clang-omp ln -s /usr/local/opt/llvm/bin/clang++ /usr/local/bin/clang-omp++ |
The openmp then works in my computer, we can use clang-omp++ main.cpp -o main -fopenmp to compile an openmp program.