GNU bug report logs - #78783
30.1.50; AOT-compiling site-lisp during the Emacs build doesn't work

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Message #13 received at 78783 <at> debbugs.gnu.org (full text, mbox):

From: Spencer Baugh <sbaugh <at> janestreet.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: acorallo <at> gnu.org, 78783 <at> debbugs.gnu.org, app-emacs-dev <at> janestreet.com
Subject: Re: bug#78783: 30.1.50; AOT-compiling site-lisp during the Emacs
 build doesn't work
Date: Fri, 13 Jun 2025 11:41:27 -0400

Eli Zaretskii <eliz <at> gnu.org> writes:
> severity 78783 wishlist
> thanks
>
>> Cc: Andrea Corallo <acorallo <at> gnu.org>, app-emacs-dev <at> janestreet.com
>> Date: Fri, 13 Jun 2025 09:34:10 -0400
>> From:  Spencer Baugh via "Bug reports for GNU Emacs,
>>  the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
>> 
>> 
>> Native compilation of site-lisp directories during the Emacs build
>> (e.g. --with-native-compilation=aot) produces .eln files which are
>> unused when installed.
>
> Why are you compiling files in site-lisp during the build?  This is
> not supported, and I see no reason why we should extend our build
> processes to support it.
>
> Why cannot you compile site-lisp files after Emacs is built and
> installed?

If a site-lisp file is built (whether as part of Emacs or not) and
subsequently installed into the site-lisp directory, its file name will
change.  That changes the path_hash computed by
comp-el-to-eln-rel-filename which will cause this issue.

This is a general problem with AOT-compiling files which are
subsequently installed somewhere else.  It applies both for core Emacs
files and for site-lisp.

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