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No -fopenmp on macOS #155

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Artoria2e5 opened this issue Aug 2, 2020 · 1 comment
Open

No -fopenmp on macOS #155

Artoria2e5 opened this issue Aug 2, 2020 · 1 comment

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@Artoria2e5
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Artoria2e5 commented Aug 2, 2020 •
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The clang++ that comes with XCode does not support -fopenmp directly, in two ways:

  • There's no libomp (Need ExternalDependencies or a hacky brew install OS case)
  • The compiler does not recognize directly (but we can use -Xpreprocessor -fopenmp -lomp instead as the OMPFLAGS)

Quite a few packages we have here are affected by this issue, but a grep with -fopenmp should reveal most of them. The most glaring one is of course pts/smallpt, since it's literally the "hello world" of benchmarks mentioned in PTS readme.
@smitty-codes
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@Artoria2e5 Could you explain the workarounds you mentioned above for this?

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@smitty-codes @Artoria2e5