bug#50666: 28.0.50; Fix native compilation on Cygwin

[Ken Brown]

On 9/19/2021 8:06 AM, Eli Zaretskii wrote:
> > From: ASSI <Stromeko@nexgo.de>
> > Cc: ASSI <Stromeko@nexgo.de>,  50666@debbugs.gnu.org
> > Date: Sun, 19 Sep 2021 13:31:09 +0200
> >
> > Eli Zaretskii writes:
> > > So this basically means that native-compilation is unworkable for
> > > 32-bit Cygwin, right?
> >
> > Explicit rebasing should work on both architectures, the question is
> > just how to best ensure it's done correctly.
>
> Since Emacs 28 performs native-compilation automatically in the
> background, and also automatically loads the *.eln files once
> produced, I'm not sure what you mean by "should work" if we assume the
> user will have to rebase manually.

Cygwin could maintain a per-user database of *.eln files and their base 
addresses.  (It already maintains a system database of this type.)  The each 
time a new *.eln file is created, it could be rebased and added to the database 
before being loaded.

Ken