You can't really do it, the best way is to build it with Clang installed with Homebrew and then put in the installation instructions to ask users to install Ope

You can't really do it, the best way is to build it with Clang installed with Homebrew and then put in the installation instructions to ask users to install OpenMP with `brew install libomp`. It really frustrates me that Apple strip it out of their build of Clang in favour of pushing their own Grand Central Dispatch.