[all-commits] [llvm/llvm-project] bc9aa0: [C] Add -Wtentative-definition-compat (#137967)

[Aaron Ballman via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: bc9aa0f4c4c6ad9dd6207097478f4e461a8fe5cb
      https://github.com/llvm/llvm-project/commit/bc9aa0f4c4c6ad9dd6207097478f4e461a8fe5cb
  Author: Aaron Ballman <aaron at aaronballman.com>
  Date:   2025-05-01 (Thu, 01 May 2025)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/include/clang/Basic/DiagnosticGroups.td
    M clang/include/clang/Basic/DiagnosticSemaKinds.td
    M clang/lib/Sema/SemaDecl.cpp
    M clang/test/Sema/warn-default-const-init.c
    A clang/test/Sema/warn-tentative-defn-compat.c

  Log Message:
  -----------
  [C] Add -Wtentative-definition-compat (#137967)

This adds a new diagnostic to warn about redeclaration of a tentative
definition in C. This is incompatible with C++, so the new diagnostic
group is under -Wc++-compat.



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