[Openmp-dev] OpenMP defines __CUDA_ARCH__ for offloading, should it?

[Hal Finkel via Openmp-dev]

On 7/22/20 11:34 AM, Jon Chesterfield via Openmp-dev wrote:
> Discovered by accident while looking into a bug for Ron (cc'd).
>
> OpenMP running on nvptx defines the __CUDA_ARCH__ macro. Do we think 
> it should? OpenMP target offloading is somewhat implemented in terms 
> of cuda but that seems incidental.


Shouldn't it do this only when compiling device code for NVIDIA 
architectures?

  -Hal


>
> I'd like a __GPU_ARCH__ macro which expands to something useful for 
> nvptx, amdgcn, other. And to not define CUDA_ARCH when compiling 
> openmp offloading code.
>
> Thoughts?
>
> Jon
>
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-- 
Hal Finkel
Lead, Compiler Technology and Programming Languages
Leadership Computing Facility
Argonne National Laboratory

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