GNU bug report logs - #62762
'make' often errors with "Org version mismatch" after pulling a new version of the code

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Message #164 received at 62762 <at> debbugs.gnu.org (full text, mbox):

From: Max Nikulin <manikulin <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: yantar92 <at> posteo.net, 62762 <at> debbugs.gnu.org, bzg <at> gnu.org, dmitry <at> gutov.dev,
 monnier <at> iro.umontreal.ca, acm <at> muc.de
Subject: Re: bug#62762: 'make' often errors with "Org version mismatch" after
 pulling a new version of the code
Date: Fri, 5 May 2023 22:33:48 +0700

On 05/05/2023 18:33, Eli Zaretskii wrote:
>> Date: Fri, 5 May 2023 18:20:09 +0700 From: Max Nikulin
>> On 05/05/2023 17:38, Eli Zaretskii wrote:
>>>>> This doesn't work in Emacs, in general, due to circular dependencies.

Eli, I am still unable to associate this with particular cases of elisp 
code or with how it is split over several files. That is why I am again 
asking for examples illustrating issues you have in mind.

>>> What do you mean by "unavoidable"?
>>
>> Max Nikulin Fri, 5 May 2023 11:18:17 +0700
>>> In the C and C++ world the solution for cyclic dependencies is forward
>>> declarations. Some kind of such approach I see in Org as well.
>>> lisp/org/ol.el and lisp/org/org-element.el are mutually dependent.
>>> org-element.el requires 'ol, while the latter just declares functions
>>> from 'org-element.
> 
> If it's this part, then I don't see how it can be relevant to our
> case: our problem is to teach Make about these dependencies, not to
> teach a Lisp compiler about them.

I can not figure out which kind of cyclic dependencies may cause 
troubles with dependency generation, but I had a hope that it would be 
possible to reorganize code to avoid such kind of dependencies.

> I don't have ready examples off the top of my head, sorry.  You have
> the Emacs Lisp sources, so you have all the information, and can find
> those circular dependencies yourself if you don't believe me and
> Stefan.

It might be even better if you will provide a brief example unrelated to 
real Emacs code. I have no idea which code I should search for.

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