[PATCH] D96877: [libomptarget] Try a fallback devicertl if the preferred one is missing

[Jon Chesterfield via Phabricator via cfe-commits]

JonChesterfield created this revision.
JonChesterfield added reviewers: jdoerfert, ye-luo, tianshilei1992, ABataev, grokos.
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[libomptarget] Try a fallback devicertl if the preferred one is missing

Clang may be used with a cuda version that is newer than the clang release.
This may fail in various ways, but there is also a credible chance it will
work OK, for sufficiently small version slip.

As discussed in the weekly call, this change adds a fallback path to clang
which looks for a devicertl library that doesn't have a specific cuda version
encoded in the name, specifically 'libomptarget-nvptx-unknown.bc'. It also
warns about this, and recommends the user specify a devicertl they expect to
work manually.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D96877

Files:
  clang/include/clang/Basic/DiagnosticDriverKinds.td
  clang/lib/Driver/ToolChains/CommonArgs.cpp

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