bug#74805: 30.0.92; Trying to build scratch/igc on Cygwin

[Eli Zaretskii <eliz@gnu.org>]

> From: Stefan Kangas <stefankangas@gmail.com>
> Date: Thu, 12 Dec 2024 03:05:58 -0800
> 
> Ken Brown <kbrown@cornell.edu> writes:
> 
> > I've made a first attempt to port mps to Cygwin.  If anyone else is
> > interested in seeing this or helping, you can find my work at
> >
> >    https://github.com/kbrow1i/mps-cygwin
> >
> > This is a fork of the mps git repo with two commits on top.
> >
> > With the current attempt, I can build the scratch/igc branch, but there
> > are many test failures.  For example, when I run the process-tests, I
> > get 19 failures and 8 skipped tests.  But on the master branch I get no
> > failures and only 3 skipped.
> >
> > This probably means that my current attempt to port mps is no good, and
> > I have to go back to the drawing board.  Before I do that, however, I'd
> > like to check and see if test failures on scratch/igc are to be
> > expected.  Are people testing other platforms seeing this too?
> 
> Do we expect upstream to be amenable to eventually taking these patches?

I don't think we've asked them.  Maybe Gerd knows?

> I see that they officially only support "Windows Vista or later, on
> IA-32 and x86-64, using Microsoft Visual C/C++".

Yes.