bug#62762: 'make' often errors with "Org version mismatch" after pulling a new version of the code

[Eli Zaretskii]

> From: Ihor Radchenko <yantar92@posteo.net>
> Cc: dmitry@gutov.dev, bzg@gnu.org, 62762@debbugs.gnu.org
> Date: Tue, 11 Apr 2023 18:59:17 +0000
> 
> >> What we might do to work around the problem is detecting Emacs compilation
> >> and disable the check. Is there a way to detect that Emacs source is
> >> being compiled from Elisp?
> >
> > Not sure I understand: the byte compiler is a Lisp program, so every
> > compilation is "from Lisp", no?  Or what am I missing?
> 
> I mean, can we detect when the compiler is invoked from "make" in Emacs
> source?

I guess we ccoul define some environment variable in Lisp/Makefile?

> > I guess it means we are on our own, sigh...
> 
> You are not. In the worst case, we may add some flag into Org sources
> that are inside Emacs tree. Something like `org-version-built-in-p' that
> will be set to t only in the Emacs' version of Org.

And what will that mean when org-version.el bumps its version?