bug#50666: 28.0.50; Fix native compilation on Cygwin

[Eli Zaretskii]

> Cc: Stromeko@nexgo.de, 50666@debbugs.gnu.org
> From: Ken Brown <kbrown@cornell.edu>
> Date: Sun, 19 Sep 2021 12:17:51 -0400
> 
> >> In the meantime, is it OK if I install my patch to enable building with 
> >> native
> >> compilation?  That would simplify experimentation.
> > 
> > Yes, it's okay to install that, but it's a band-aid at best, and we'd
> > like to have the complete solution in Emacs before we release v28.1.
> > Is that feasible?
> 
> Yes, I think so.

Great, let's hopw you will succeed.

> And if we're not able to do it, I would propose disabling native
> compilation on 32-bit Cygwin.  The user experience is terrible as it
> stands.

Yes, that's why I said "unworkable".  Indeed, disabling it in that
case would be TRT.