[Bug driver/123558] [13/14/15/16 Regression] -Fdir option should be darwin only

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123558

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |4.0.4
      Known to work|                            |3.4.6
   Target Milestone|---                         |13.5
            Summary|-Fdir option should be      |[13/14/15/16 Regression]
                   |darwin only                 |-Fdir option should be
                   |                            |darwin only
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2026-01-12
     Ever confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Hmm, I thought this was only accepted for darwin. 

But nope:
```
    case OPT_F:
      /* Likewise -F.  */
      save_switch (concat ("-F", arg, NULL), 0, NULL, validated, true);
      return true;
```


GCC 3.4.6 used to warn so this is a regression:
g++: unrecognized option `-Faa'