bug#60996: 29.0.60; Native compile fails to remove temp file for trampoline

[Eli Zaretskii]

> From: Andrea Corallo <akrl@sdf.org>
> Cc: andrewjmoreton@gmail.com, 60996@debbugs.gnu.org
> Date: Thu, 26 Jan 2023 19:46:25 +0000
> 
> >> If (as I understand) in Windows we can't delete a mapped file we have a
> >> problem more to solve.
> >
> > Yes.  If this is what happens, then I think we will have to maintain a
> > list of such trampolines, and delete them just before exiting, after
> > calling dynlib_close for them.
> 
> Mmmhh, and what if another Emacs tries to delete or overwrite the same
> file?

This shouldn't happen, since the *.eln files are generated with
make-temp-file.

> But my question is: is this mechanism _really_ necessary?
> 
> >From my POV it's just a kludge that was, is and will be source of
> problems.  Was never clear to me for which specific reason this was
> implemented as, at the time, I had the impression that all Debian
> requirements could be handled with what we already offered.
> 
> At the time I firmly opposed to this change, but I was told by Lars it
> went into master "for discussion" (!?), indeed the review discussion
> never happened...  and now we are left with this present.
> 
> Unless we have a very strong reason to keep it, I believe we should just
> get rid of this mechanism, otherwise it will be source of pain for us
> again and again in the future.

I'll have to refresh my memory about the reasons and the actual
changeset.