[Bug driver/98943] [11 Regression] gcc driver does not fail on unknown files: tricks configure scripts to recognize /W4 and -diag-disable 1,2,3,4 options

[joseph at codesourcery dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98943

--- Comment #7 from joseph at codesourcery dot com <joseph at codesourcery dot 
com> ---
On Wed, 3 Feb 2021, nathan at gcc dot gnu.org via Gcc-bugs wrote:

> a) Reject any filename that is -STUFF (allow plain '-')

Any -STUFF that's not a known option should be handled as 
OPT_SPECIAL_unknown and should not go through OPT_SPECIAL_input_file code 
at all.