pthreads linking in devel/F-13 issue

[Paul Wouters]

Does someone know why this is going wrong?

---------- Forwarded message ----------
Date: Wed, 24 Feb 2010 18:32:54 +0100
From: W.C.A. Wijngaards <wouter(a)NLnetLabs.nl&gt;
To: unbound-users(a)unbound.net
Subject: Re: [Unbound-users] unbound linking bug with pthreads

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi Paul,

Unbound uses http://www.nongnu.org/autoconf-archive/acx_pthread.html
in acx_pthread.m4.  It uses configure-style compilation tests to see
what works, and tries -pthread (CFLAGS) and later -lpthread (LIBS).  It
does not try both at once.

For me, I end up with -pthread in the CFLAGS. This is included on the
commandline when linking.  Perhaps -pthread is enough when linking, or
does it have to be -lpthread ?  If so, the configure test to link with
- -pthread should be failing and perhaps a test added to the macro and
submitted upstream.

If the new system has pthread-config you can set both cflags and libs
with that, no patch required.

Best regards,
    Wouter

On 02/24/2010 05:37 PM, Paul Wouters wrote:
>  Hi,
>
>  Fedora 13 will no longer implicitely link in certain libraries. For
>  a full description see:
>
>  https://fedoraproject.org/wiki/UnderstandingDSOLinkChange
>
>  This is happening with unbound and the pthreads library. So we need to
>  pass it a -lpthreads when we are compiling with --with-pthreads.
>
>  I'm not a "configure" expert, so while I do see some tests in configure,
>  I don't understand where it remembers the additional -lpthread argument
>  which needs to be added to the Makefile's LIBS=
>
>  Currently, on my Linux machine which ran with --with-phtreads, I see in
>  Makefile:
>
>      LIBS=$(strip -lldns -levent -lrt   -lcrypto)
>
>  This is missing -lpthread
>
> >  Paul 
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.9 (GNU/Linux)
> Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org/
>
> iEYEARECAAYFAkuFYsYACgkQkDLqNwOhpPiKFwCeLJ3fwcO7Ye4Kp+bq/LuVIyn1
> 1B4AoILnaK2bP8SJ9PePI1Xw6Oa/5euf
> =yj7Q
> -----END PGP SIGNATURE----- 
_______________________________________________
Unbound-users mailing list
Unbound-users(a)unbound.net
http://unbound.nlnetlabs.nl/mailman/listinfo/unbound-users