https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88270
--- Comment #4 from Richard W.M. Jones <rjones at redhat dot com> ---
FWIW I was testing:
gcc (FreeBSD Ports Collection) 7.3.0
$ cat test.c
#include <stdio.h>
int
main (int argc, char *argv[])
{
printf ("%m\n");
return 0;
}
$ gcc -Wformat test.c
(no warnings)
$ gcc -Wformat -Wpedantic test.c
test.c: In function 'main':
test.c:6:13: warning: ISO C does not support the '%m' gnu_printf format
[-Wformat=]
printf ("%m\n");
^
