[Bug c/61739] __builtin_printf optimization conflicts with POSIX semantics

[bugdal at aerifal dot cx]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61739

--- Comment #4 from Rich Felker <bugdal at aerifal dot cx> ---
Sorry, that should be:

printf("");
printf("%d\n", fwide(stdout, 0));