[Bug driver/83193] Help for invalid -march= options from cc1 omits -march=native on x86-64, arm. aarch64, output also inconsistent

[andrewm.roberts at sky dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83193

--- Comment #4 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Correct, it does not show native in the list of valid options presented to the
user.