Is OpenMP available in High Sierra LLVM?

Question

In the default LLVM provided by Apple in macOS 10.13, High Sierra, is OpenMP finally available? It has been available in main LLVM for more than a year now.

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Answer 1

No, it is not (officially). The Apple LLVM is roughly based on 4.0, but the OpenMP module is left out. You can even see a remaining OpenMP option in the help to set offloading targets, but it does not support OpenMP.

$ clang++ --help | grep openmp
  -fopenmp-targets=

Apple, adding OpenMP would be a huge boon to science researchers!

Note: Brew has support for building the OpenMP library! Use:

brew install libomp

A patch has been accepted into CMake that will allow users to get the correct compile and linking line OpenMP in CMake 3.12 if they use the targets system.