Bug#1122038: libc6-dev: symbols not covering GLIBC_ABI_GNU_TLS on i386

[Aurelien Jarno <aurel32@debian.org>]

Hi,

On 2025-12-06 14:59, Samuel Thibault wrote:
> Samuel Thibault, le sam. 06 déc. 2025 14:53:44 +0100, a ecrit:
> > Adrian Bunk, le sam. 06 déc. 2025 07:22:50 +0200, a ecrit:
> > > https://ci.debian.net/packages/s/starpu/testing/i386/66851610/
> > > 
> > > ...
> > >  45s starpu_machine_display: /lib/i386-linux-gnu/libc.so.6: version `GLIBC_ABI_GNU_TLS' not found (required by starpu_machine_display)
> > > ...
> > > 
> > > 
> > > This can be reproduced with starpu-tools/unstable and libc6/forky:
> > > 
> > > $ starpu_machine_display
> > > starpu_machine_display: /lib/i386-linux-gnu/libc.so.6: version `GLIBC_ABI_GNU_TLS' not found (required by starpu_machine_display)
> > 
> > And more generally, a mere program int main(void) {} compiled with
> > unstable gets this error in forky. Libraries are not affected.
> 
> (for the background, this symbol is apparently on purpose on i386:
> https://sourceware.org/git/?p=glibc.git;a=commit;h=ed1b7a5a489ab555a27fad9c101ebe2e1c1ba881
> https://sourceware.org/bugzilla/show_bug.cgi?id=32996 )

Yes. And the symbol is actually correctly covered in the symbols file. 
But it is exported as part of the .gnu.version_r section, which is not 
checked by dpkg-gensymbols.

At this stage, I do not have more idea than forcing the minimum version 
to 2.42 on i386. That will be for all binaries, not the ones actually 
needing that (e.g. libraries).

Regards
Aurelien

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
aurelien@aurel32.net                     http://aurel32.net