bug#47800: [native-comp] could not resolve realpath of "emacs"

[Eli Zaretskii]

> From: Andrea Corallo <akrl@sdf.org>
> Cc: Eli Zaretskii <eliz@gnu.org>, psainty@orcon.net.nz, 47800@debbugs.gnu.org
> Date: Fri, 16 Apr 2021 09:27:51 +0000
> 
> > But I can at least confirm that the issue is that raw_name is not
> > resolved according to PATH prior to the call of real_filename in
> >
> >   char *filename = real_filename (SSDATA (raw_name));
> 
> I agree that's the issue.

I think the issue is slightly more complex.

Andrea, is native-compilation supported with unexec, or only with
pdumper?  If the former, where in the code and when do we load the
preloaded *.eln files? are they dumped into the Emacs executable?

If we don't support native-compilation with unexec, we should reject
that combination in configure, right?