| Issue |
176070
|
| Summary |
[Clang] On GCC, C23 `typeof` strips `noreturn` attribute on function pointers
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
fuhsnn
|
https://godbolt.org/z/e8M18778s
```C
[[gnu::noreturn]]
extern void(*fptr)(void);
int typeof_ext(int i, __typeof(fptr) p) {
p();
return i; // not emitted because p is noreturn
}
int typeof_std(int i, typeof(fptr) p) {
p();
return i; // emitted on GCC C23
}
```
When under C23 and using the standard (not underscored) spelling of `typeof`, GCC would remove the `noreturn` attribute from the function pointer type.
>From GCC's commit message (https://github.com/gcc-mirror/gcc/commit/fa258f6894801aef6785f0327594dc803da63fbd) this seems to be intentional.
Could be dangerous if someone rely on this behavior and only test with GCC.
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