bug#43050: 28.0.50; portable dump file name should respect program-prefix config option

[Eli Zaretskii]

> From: Glenn Morris <rgm@gnu.org>
> Cc: 43050@debbugs.gnu.org,  "T.V Raman" <raman@google.com>
> Date: Fri, 13 Nov 2020 01:16:35 -0500
> 
> Glenn Morris wrote:
> 
> >> The only thing that's missing, AFAICT, is that "make install" should
> >> apply the prefix to the dumper file name.
> >
> > There's a patch for that in https://debbugs.gnu.org/42790
> 
> However, that probably isn't enough since by experiment it seems as if
> Emacs prefers "emacs.pdmp" to more specific names.

Maybe we should change that preference?  AFAIR, the preference is
there only as the last resort, no?  Or when does that preference make
sense?

> I guess putting the fingerprint in the pdmp name is the only proper solution.

If changing the preference for emacs.pdmp isn't workable, you are
probably right.