[PATCH] D137917: [cmake] Fix _GNU_SOURCE being added unconditionally

[Tom Stellard via Phabricator via cfe-commits]

tstellar added a comment.

I think this looks OK.  What kind of errors were you seeing before this fix?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D137917/new/

https://reviews.llvm.org/D137917