GNU bug report logs - #70342
29.3.50; treesitter and RTLD_GLOBAL

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Stefan Kangas <stefankangas <at> gmail.com>
Cc: casouri <at> gmail.com, mick.lausch <at> gmail.com, 70342 <at> debbugs.gnu.org
Subject: bug#70342: 29.3.50; treesitter and RTLD_GLOBAL
Date: Sat, 01 Mar 2025 11:24:45 +0200

> From: Stefan Kangas <stefankangas <at> gmail.com>
> Date: Fri, 28 Feb 2025 18:49:50 -0800
> Cc: Michael Lausch <mick.lausch <at> gmail.com>, 70342 <at> debbugs.gnu.org, 
> 	Yuan Fu <casouri <at> gmail.com>
> 
> Eli Zaretskii <eliz <at> gnu.org> writes:
> 
> >> From: Michael Lausch <mick.lausch <at> gmail.com>
> >> Date: Thu, 11 Apr 2024 20:47:50 +0200
> >> Cc: 70342 <at> debbugs.gnu.org
> >>
> >>  > A solution can be:
> >>  > 1) use a special call to dlopen without the RTLD_OPEN flag, sim,ilar to what the eln loader does.
> >>  > 2) fix all the grammars and make all functions 'static' so that the functions are not visible outside the
> >>  > compilation unit.
> >>  > 3) something i didn't think about
> >>
> >>  If those 'serialize' functions are not needed to be called from
> >>  outside of the shared library, the usual way is not to export them,
> >>  i.e. to give all symbols except the few that need to be exported the
> >>  so-called "hidden visibility".
> >>
> >> I agree that this would be the cleanest way to solve the problem, but that would mean to patch all the existing
> >> grammars and maybe all the future grammars and push the changes to their maintainers.
> >>
> >> I started to prep patches for the yaml and org grammar (those were the ones which triggered the bug for me)
> >> and i'm going to have them merged upstream.
> >
> > I understand, but why is this an Emacs problem?  We use RTLD_GLOBAL
> > for a reason, and the problem of not exposing unnecessary symbols
> > should be solved by the respective libraries and those who build them.
> 
> I'd tend to agree.  Should this therefore be closed?

I think so, yes.

> I'm copying in Yuan also.

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