[PATCH] D124534: [clang] Add a diagnostic for line directive of a gnu extension

[Ken Matsui via Phabricator via cfe-commits]

ken-matsui added a comment.

@aaron.ballman

I could suppress the strange warnings by using `isWrittenInBuiltinFile` and `isWrittenInCommandLineFile`. Thank you!
Could you please review this patch?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D124534/new/

https://reviews.llvm.org/D124534