[all-commits] [llvm/llvm-project] e3f87e: [C] Fix a false-positive with tentative defn compa...

Aaron Ballman via All-commits all-commits at lists.llvm.org
Tue May 13 08:00:18 PDT 2025


  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e3f87e15910a5f1c5552fc3ef57e7dda3f68901a
      https://github.com/llvm/llvm-project/commit/e3f87e15910a5f1c5552fc3ef57e7dda3f68901a
  Author: Aaron Ballman <aaron at aaronballman.com>
  Date:   2025-05-13 (Tue, 13 May 2025)

  Changed paths:
    M clang/lib/Sema/SemaDecl.cpp
    M clang/test/Sema/warn-tentative-defn-compat.c

  Log Message:
  -----------
  [C] Fix a false-positive with tentative defn compat (#139738)

C++ has a carve-out that makes a declaration with 'extern' explicitly
specified and no initializer be a declaration rather than a definition.
We now account for that to silence a diagnostic with:
```
  extern const int i;
  const int i = 12;
```
which is valid C++.

Addresses an issue that was brought up via post-commit review.



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