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Re: Undefined use of weak symbols in gnulib

From: Florian Weimer
Subject: Re: Undefined use of weak symbols in gnulib
Date: Sat, 17 Jul 2021 16:55:26 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux)

* Bruno Haible:

> Florian Weimer wrote on 2021-04-28:
>> However, you should really remove those weak symbol
>> hacks.  They won't have any effect for glibc 2.34
> I'm trying to do this now. But what is the right condition?
> 1) I understand that it's only for glibc >= 2.34 on Linux (NPTL),
>    right? Not on Hurd (HTL)?

Yes, Hurd hasn't been integrated.

> 2) /usr/include/gnu/lib-names.h still defines LIBPTHREAD_SO.
>    How about not defining LIBPTHREAD_SO, since linking with it is supposed
>    to be a no-op in these newer glibc versions?

I'm not sure if this is the right way, given that the file still exists
for all currently supported targets.

An alternative would be to add a macro to <pthread.h>, such as


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