[PATCH] D144654: [Lex] Warn when defining or undefining any builtin macro

[John Brawn via Phabricator via cfe-commits]

john.brawn updated this revision to Diff 503305.
john.brawn added a comment.

Add command line test and release note, and run clang-format.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D144654/new/

https://reviews.llvm.org/D144654

Files:
  clang/docs/ReleaseNotes.rst
  clang/lib/Lex/PPDirectives.cpp
  clang/test/Lexer/builtin_redef.c
  clang/test/Preprocessor/macro-reserved.c
  clang/test/Preprocessor/macro-reserved.cpp

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