| commit | 576161cb6069e2c7656a8ef530727a0f4aefff30 | [log] [tgz] |
|---|---|---|
| author | Aaron Ballman <aaron@aaronballman.com> | Fri Apr 25 08:21:41 2025 -0400 |
| committer | GitHub <noreply@github.com> | Fri Apr 25 08:21:41 2025 -0400 |
| tree | d099c1de03f3add52656ecbba87e7f5ed19993b8 | |
| parent | 320ec7fa7f2ca9385e355d3e031e601a9e331e3e [diff] |
[C] Warn on uninitialized const objects (#137166) Unlike C++, C allows the definition of an uninitialized `const` object. If the object has static or thread storage duration, it is still zero-initialized, otherwise, the object is left uninitialized. In either case, the code is not compatible with C++. This adds a new diagnostic group, `-Wdefault-const-init-unsafe`, which is on by default and diagnoses any definition of a `const` object which remains uninitialized. It also adds another new diagnostic group, `-Wdefault-const-init` (which also enabled the `unsafe` variant) that diagnoses any definition of a `const` object (including ones which are zero-initialized). This diagnostic is off by default. Finally, it adds `-Wdefault-const-init` to `-Wc++-compat`. GCC diagnoses these situations under this flag. Fixes #19297
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