https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64223
--- Comment #4 from Harald van Dijk <harald at gigawatt dot nl> ---
Ah, GCC does not treat format(printf) and format(__printf__) as equivalent, and
the built-in declaration uses format(printf). With custom functions, two
warnings can also be generated:
int myprintf (const char *, ...) __attribute__ ((__format__ (printf, 1, 2)));
int myprintf (const char *, ...) __attribute__ ((__format__ (__printf__, 1,
2)));
int main(void)
{
myprintf("%d\n", 0L);
return 0;
}
When combined with gnu_printf and __gnu_printf__, it can become even worse.
