[RFC/PATCH] gcc.c: access does not work in new msvcr for nul file

[Alexander Monakov]

On Thu, 3 Jan 2019, Johannes Pfau wrote:
> 
> Debugging shows that the access function used to check
> if the input files exist has different behavior in newer msvcr libraries:
> It does return proper results for the 'nul' file in the old msvcrt.dll
> but in newer libraries it returns EINVAL for the nul file.

I would recommend to consult with MinGW-W64 maintainers first: it may be
appropriate to handle this in mingw's wrapper for the access function.
In any case, they should be informed about this weird regression.

Cheers.
Alexander