https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114775
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |INVALID Status|UNCONFIRMED |RESOLVED --- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> --- This is documented this way. If you want to use C99 printf format, you need to use gnu_printf instead (note gnu_printf format is for all targets and not just mingw).