From: Bruno Haible <bruno@clisp.org>
To: Florian Weimer <fweimer@redhat.com>
Cc: bug-gnulib@gnu.org, libc-alpha@sourceware.org
Subject: Re: Undefined use of weak symbols in gnulib
Date: Sat, 17 Jul 2021 18:39:32 +0200 [thread overview]
Message-ID: <1690960.U8ZAqMrVH5@omega> (raw)
In-Reply-To: <87a6mlyopt.fsf@oldenburg.str.redhat.com>
Hi Florian,
> > 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.
Thanks for the rapid answers.
> An alternative would be to add a macro to <pthread.h>, such as
> PTHREAD_IN_LIBC.
This would be useful, yes. Like there is a <gnu/stubs.h> that gives meta-
information about functions that are stubs, it is useful to have a way
to find out whether a library is a stub. For cross-compilation scenarios,
implementing it through a macro in some header file is better than
implementing it through some file in /lib/ on the file system.
Bruno
next prev parent reply other threads:[~2021-07-17 16:39 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-27 5:53 Undefined use of weak symbols in gnulib Florian Weimer
2021-04-27 6:50 ` Paul Eggert
2021-04-27 6:58 ` Florian Weimer
2021-04-27 7:13 ` Paul Eggert
2021-04-27 7:24 ` Andreas Schwab
2021-04-27 11:06 ` Florian Weimer
2021-04-28 0:09 ` Bruno Haible
2021-04-28 2:10 ` H.J. Lu
2021-04-28 2:13 ` H.J. Lu
2021-05-05 20:31 ` Fangrui Song
2021-04-28 8:35 ` Florian Weimer
2021-04-28 13:15 ` Michael Matz
2021-04-28 7:44 ` Florian Weimer
2021-04-28 14:48 ` Bruno Haible
2021-04-28 17:44 ` Florian Weimer
2021-07-17 14:38 ` Bruno Haible
2021-07-17 14:55 ` Florian Weimer
2021-07-17 16:39 ` Bruno Haible [this message]
2021-07-27 20:02 ` Joseph Myers
2021-07-27 20:19 ` Florian Weimer
2021-07-27 23:38 ` Paul Eggert
2021-07-17 16:21 ` Bruno Haible
2021-04-27 23:22 ` Bruno Haible
2021-04-27 23:47 ` Bruno Haible
2021-04-28 7:57 ` Florian Weimer
2021-04-28 14:40 ` Bruno Haible
2021-04-28 17:43 ` Florian Weimer
2021-04-29 15:15 ` Bruno Haible
2021-04-30 9:55 ` Florian Weimer
2021-04-29 6:33 ` Ben Pfaff
2021-05-03 1:44 ` Alan Modra
2021-07-12 10:04 ` Michael Hudson-Doyle
2021-07-12 15:03 ` Florian Weimer
2021-07-12 15:30 ` Matthias Klose
2021-07-12 15:37 ` Florian Weimer
2021-07-13 0:22 ` Michael Hudson-Doyle
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://lists.gnu.org/mailman/listinfo/bug-gnulib
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1690960.U8ZAqMrVH5@omega \
--to=bruno@clisp.org \
--cc=bug-gnulib@gnu.org \
--cc=fweimer@redhat.com \
--cc=libc-alpha@sourceware.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).