[Bug driver/108350] Windows: invoking gcc via symlink does not work

[gnu.org at billz dot fastmail.fm]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108350

--- Comment #7 from Bill Zissimopoulos <gnu.org at billz dot fastmail.fm> ---
(In reply to niXman from comment #6)
> > I would use `FILE_NAME_NORMALIZED` and `VOLUME_NAME_DOS`.
> 
> together? OR'ed?
> 
> or should I try for the first, and for the second one? or...?

Yes, or them together: `FILE_NAME_NORMALIZED | VOLUME_NAME_DOS`.

- `FILE_NAME_NORMALIZED` is needed to actually perform the symbolic link
resolution.

- `VOLUME_NAME_DOS` is needed to translate the internal NT device name to the
familiar Win32 drives (X:). This may fail with `ERROR_UNRECOGNIZED_VOLUME`
which is why I recommended to use GetFullPathName as a fallback mechanism.