https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63499
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Zbigniew Jędrzejewski-Szmek from comment #3) > So, there's no way to programmatically check whether a flag is supported, > without resorting to grepping the output or something like that. Great. No there is way just use the positive side rather than the no- option.