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

[Stefan Monnier]

>>> May you provide an approximate code for that function?
>>
>> Something like (guaranteed 100% untested):
>>
>>     (defun my-require-with-shadow-check (feature &optional reload)
>
> Thanks!
> This looks interesting, if we replace all the requires in Org with
> `my-require-with-shadow-check'.

If we make it signal an error, then I think we only need it for the
requires that load "the one first file" (which you suggest could be
`org-macs.el`).

> Although, AFAIU, it does not address the problem with stale .elc files
> kept from the previous Org version in the same folder (AFAIR, it is what
> often happens in ELPA builds).

I don't understand what you mean here: when `package.el` compiles the
files of the Org package, that package has just been untarred into
a fresh new directory, so there should never be any stale `.elc` files
in there.

Stale `.elc` files can happen for "in place builds", such as when doing
`git pull; make` in Emacs's source directory, but we just disabled
the mixed-version check for that case...

> And we somehow need to make sure that `my-require-with-shadow-check' is
> available for all its users.

Ah, the fun of bootstrapping :-)


        Stefan