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

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Message #11 received at 70342 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Michael Lausch <mick.lausch <at> gmail.com>
Cc: 70342 <at> debbugs.gnu.org
Subject: Re: bug#70342: 29.3.50; treesitter and RTLD_GLOBAL
Date: Thu, 11 Apr 2024 21:54:39 +0300

> 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.

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