[PATCH] D68055: Add -fgnuc-version= to control __GNUC__ and other GCC macros

[Fangrui Song via Phabricator via cfe-commits]

MaskRay accepted this revision.
MaskRay added a comment.

This will make it much easier to test clang's compatibility with GCC, especially in projects that heavily use `__GNUC__` or its friends, e.g. glibc :)


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D68055/new/

https://reviews.llvm.org/D68055