bug#36649: 27.0.50; pure space and pdumper

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: eggert@cs.ucla.edu,  rpluim@gmail.com,  stefan@marxist.se,
>   schwab@linux-m68k.org,  monnier@iro.umontreal.ca,  pipcet@gmail.com,
>   36649@debbugs.gnu.org,  akrl@sdf.org
> Date: Wed, 12 May 2021 21:07:00 +0200
> 
> Or...  is this the way do get an unexec build these days?
> 
> ./configure --with-unexec=yes --with-dumping=none
> 
> This does not segfault here.  I'll try to get some timings done with the
> pure space removal + unexec, then...

I don't know if this is an interesting configuration.  AFAIU,
"--with-dumping=none" means you run the CANNOT_DUMP version, which
doesn't dump Emacs at all.