[PATCH] D128090: [Clang][OpenMP] Process multi-arch compilation options given via -march

[Artem Belevich via Phabricator via cfe-commits]

tra added a comment.

In D128090#3649235 <https://reviews.llvm.org/D128090#3649235>, @jhuber6 wrote:

> Interesting, may be worthwhile to query that if it exists, though AMD does this with `amdgpu-arch` which has led to problems for me in the past. But even if it could be wrong it will still spit out an architecture that would run on at least one local card rather than zero.

We do have existing precedent of `-march=native`, so it may make sense to introduce `--offload-arch=native`, though it may be a bit too ambiguous, considering that there may be more than one likely chouce -- multiple GPUs, possibly a mix from different vendors. Perhaps we would need something more specific, like `--offload-arch=native-nvidia`.


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