[all-commits] [llvm/llvm-project] 15f7e0: [C23] Disable diagnostic on struct defn in prototy...

[Aaron Ballman via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 15f7e029403a61412bc8c397c9205f7a930055dc
      https://github.com/llvm/llvm-project/commit/15f7e029403a61412bc8c397c9205f7a930055dc
  Author: Aaron Ballman <aaron at aaronballman.com>
  Date:   2025-05-05 (Mon, 05 May 2025)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/lib/Sema/SemaDecl.cpp
    M clang/test/C/C23/n3030.c
    M clang/test/C/C23/n3037.c
    M clang/test/C/drs/dr0xx.c
    M clang/test/C/drs/dr1xx.c
    A clang/test/Sema/c23-decl-in-prototype.c
    M clang/test/Sema/decl-in-prototype.c
    M clang/test/Sema/enum.c

  Log Message:
  -----------
  [C23] Disable diagnostic on struct defn in prototype (#138516)

Thanks to changes to type compatibility rules via WG14 N3007, these
functions can now be called with a compatible type even within the same
TU, which makes the -Wvisibility diagnostic too chatty to have on by
default.

So in C23 mode, -Wvisibility will only diagnose an incomplete tag type
declared in a function prototype. If the tag is defined in the
prototype, the diagnostic is silenced.



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