[PATCH] D80748: [clang] Add '-Wundef-prefix' warning option

[Zixu Wang via Phabricator via cfe-commits]

zixuw created this revision.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.
zixuw abandoned this revision.

Add an `-Wundef-prefix=<arg1>,<arg2>...` option, which is similar to
`-Wundef`, but only give warnings for undefined macros with the given
prefixes.
Make `-Wundef` an alias of `-Wundef-prefix=""` so that when the two
options are given together, `-Wundef` takes precedence over
`-Wundef-prefix`, as all strings are prefixed by the empty string.

rdar://55684778


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D80748

Files:
  clang/include/clang/Basic/DiagnosticGroups.td
  clang/include/clang/Basic/DiagnosticLexKinds.td
  clang/include/clang/Basic/DiagnosticOptions.h
  clang/include/clang/Driver/Options.td
  clang/lib/Frontend/CompilerInvocation.cpp
  clang/lib/Lex/PPExpressions.cpp
  clang/test/Preprocessor/warn-macro-undef-prefix.c
  clang/test/Preprocessor/warn-macro-undef.c

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D80748.266964.patch
Type: text/x-patch
Size: 6528 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/cfe-commits/attachments/20200528/9808dd5a/attachment.bin>