bug#47337: 28.0.50; [feature/native-comp] Compilation over and over again

[Eli Zaretskii]

> From: Konstantin Reich <reich-cv@yandex.ru>
> Date: Tue, 23 Mar 2021 11:42:42 +0300
> 
> With recent update, Emacs re-compiles all files over and over again.
> So for example in the directory ~/.emacs.d/eln-cache/28.0.50-da68e688
> I have file "seq-c314b42f-92293e32.eln". I start emacs and the file is
> compiled again. As a result, I have the same file with the
> updated timestamp in the same directory.
> 
> 
> Moreover, I have compiled emacs with "NATIVE_FULL_AOT=1". So i already have
> the same file in :
> /usr/local/lib/emacs/28.0.50/native-lisp/28.0.50-da68e688/
> Still, every time i start emacs, it starts to recompile all files.
> 
> It is never ending cycle of compilation.

My problem starts even earlier: dumping Emacs as part of the build
doesn't seem to load the preloaded *.eln files, but the *.elc files
instead (or at least it doesn't announce the fact that "native
compiled lisp" file is loaded), although I do have all the freshly
compiled *.eln files under native-lisp/.