[Bug target/125451] [16/17 Regression] wcwidth broken with gcc 16 on cygwin

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125451

--- Comment #13 from Drea Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Thomas Wolff from comment #12)
> In cygwin, it's 
> typedef unsigned short wchar_t;
> (for interworking with Windows)
> and
> int wcwidth(const wint_t wc);
> 
> but an unsigned short must not be sign-extended into an int.

But that is what the preprocessed source shows about the type that wcwidth
takes.

```
# 70 "/usr/include/wchar.h" 3
...
int wcwidth (const wchar_t);
```

So the bug is in cygwin's headers I think.