https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91890
--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
333 Warray-bounds
334 LangEnabledBy(C ObjC C++ LTO ObjC++)
335 ; in common.opt
This seems wrong, the second argument ", Wall" is missing. Moreover, this
probably should be an Alias for some -Warray-bounds= option.
Nevertheless, there is indeed something weird going on with the locations of
the #pragma:
char one[50];
char two[50];
void
test_strncat (void)
{
#pragma GCC diagnostic error "-Warray-bounds"
(void) __builtin_strncat (one, two, 99);
(void) __builtin_strcpy (one, "gh");
#pragma GCC diagnostic warning "-Warray-bounds"
(void) __builtin_strcpy (two, "ef");
(void) __builtin_strncat (one, two, 99);
}
// -O2 -Warray-bounds
gives 2 errors. It seems that if the #pragma is at the start of the function,
it has effect, otherwise it doesn't.
