[PATCH] D107095: This patch adds `#pragma clang header_unsafe` to enable flagging macros as unsafe for header use. This is to allow macros that may have ABI implications to be avoided in headers that have ABI stability promises.

[Chris Bieneman via Phabricator via cfe-commits]

beanz created this revision.
beanz added reviewers: aaron.ballman, rsmith, lgerbarg, pete.
Herald added a subscriber: dexonsmith.
beanz requested review of this revision.
Herald added a project: clang.

Using macros in headers (particularly public headers) can cause a
variety of issues relating to ABI and modules. This new pragma logs
warnings when using annotated macros outside the main source file.

This warning is added under a new diagnostics group -Wpedantic-macros.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D107095

Files:
  clang/docs/LanguageExtensions.rst
  clang/include/clang/Basic/DiagnosticGroups.td
  clang/include/clang/Basic/DiagnosticLexKinds.td
  clang/include/clang/Basic/IdentifierTable.h
  clang/include/clang/Lex/Preprocessor.h
  clang/lib/Lex/Pragma.cpp
  clang/lib/Lex/Preprocessor.cpp
  clang/test/Lexer/Inputs/unsafe-macro-2.h
  clang/test/Lexer/Inputs/unsafe-macro.h
  clang/test/Lexer/unsafe-macro.c

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D107095.362839.patch
Type: text/x-patch
Size: 14163 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/cfe-commits/attachments/20210729/e2710a1d/attachment-0001.bin>