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

[Ken Brown]

On 12/15/2021 1:53 PM, Ken Brown wrote:
> On 12/15/2021 1:19 PM, Glenn Morris wrote:
> > Ken Brown wrote:
> >
> > > I think the problem is that load_pdmp doesn't look in libexecdir for a
> > > .pdmp file whose name matches the name of the emacs executable. For
> > > example, suppose I have a symlink /usr/bin/emacs that resolves to
> > > /usr/bin/emacs-nox.exe. Then load_pdmp looks for
> > > /usr/bin/emacs-nox.pdmp, but it doesn't look for
> > > /usr/libexec/emacs/28.0.90/x86_64-pc-cygwin/emacs-nox.pdmp.
> >
> > Note that in Emacs 29 it uses the fingerprint in the pdmp name,
> > so that issue should not occur.
> >
> > (cf https://debbugs.gnu.org/43050)
>
> Thanks!  I missed that.

FWIW, the commit in which you did this (e81f1faca4) applies to the emacs-28 
branch and allows me to build emacs-28 for the Cygwin distro the way I want, 
with all .pdmp files under /usr/libexec.  There's no need to rename any .pdmp 
files or to use symlinks for them.

Thanks again.

Ken