bug#52488: Try basename of agrv0's realpath for .pdmp lookup in libexecdir

[Bhavin Gandhi <bhavin7392@gmail.com>]

On Wed, 15 Dec 2021 at 00:32, Bhavin Gandhi <bhavin7392@gmail.com> wrote:
>
> Why do you want that?
>
> As the comment from load_pdump_find_executable explains, there are
> setups where the /usr/bin/emacs is a symlink managed by something like
> alternatives. This symlink eventually points to an Emacs binary like
> emacs-28.0.90. These kind of setups are used to have installation of
> multiple versions of Emacs on the same system.
>
> Supporting resolution of these symlinks while searching for a .pdmp file
> will make it possible to put the .pdmp files in libexecdir instead of
> putting those in the /usr/bin/. I think this should be in addition to
> the possibilities tried currently.

Consider a scenario where /usr/bin/emacs-nox is a symlink to
emacs-28.0.90-nox. And we have emacs-nox.pdmp in libexecdir. This will
work with current implementation. But if Emacs is invoked directly as
emacs-28.0.90-nox, then it will fail.


> > Why don't you configure each Emacs build with a different libexecdir
> > instead?
>
> Sure, but there are some common files in that directory like hexl,
> movemail, etc, which package maintainers have put into a common package
> like emacs-common.

This part of the message has nothing to do with the current bug report,
it is creating confusion.