bug#56743: 29.0.50; Sharing .eln files beween different builds

[Stefan Monnier]

>> It would be good to try and make sure the `.eln` files can be shared
>> between different builds of the release tarballs (ie. the exact same
>> source code, just configured differently).  This would be beneficial for
>> example for distributions like Debian which offer `emacs-nox`,
>> `emacs-gtk`, and emacs-lucid` variants, which could then share the
>> `.eln` files.
>
> You want to remove the dependence of .eln files on the primitives that
> are implemented in C?

No, just make sure the hash used to find the `.eln` doesn't depend
whether the build is made with Lucid or Gtk or something else.

IIUC this mostly means that all the Gtk/Lucid/X11-specific
functions&variables exported to ELisp will need to be exported in all
the builds (probably with dummy definitions).


        Stefan