https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84628
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The warning/error attributes have been added for purposes like glibc memset
inline, which does:
if (__builtin_constant_p (__len) && __len == 0
&& (!__builtin_constant_p (__ch) || __ch != 0))
{
__warn_memset_zero_len ();
return __dest;
}
where __warn_memset_zero_len has the warning attribute. This only works if it
is after optimization. If you want a diagnostics whenever you reference some
function, you are looking for the deprecated attribute instead.
