[libvirt] [PATCH] configure.in: Prepend -lpthread to LIBS if required.

[Daniel P. Berrange]

On Thu, Aug 21, 2008 at 08:23:21PM +0200, Jim Meyering wrote:
> "Jun Koi" <junkoi2004 at gmail.com> wrote:
> > The latest cvs version has an error when compiling:
> >
> > make[3]: Entering directory `/home/jun/projects/libvirt-0821/src'
> > /bin/bash ../libtool --tag=CC   --mode=link gcc   -g -O2 -Wall
> ...
> > ./.libs/libvirt.so: undefined reference to `pthread_sigmask'
> > collect2: ld returned 1 exit status
> > make[3]: *** [virsh] Error 1
> 
> Thanks for the report.
> Next time, please tell us about your system,
> because I didn't 'see any such problem on a rawhide-based build.
> However, I did reproduce it on a Debian/unstable system.

I think what's going on here is some linker fun with libtool / pkgconfig

On Fedora it appears we end up automatically linked against pthread.so
as a result of libxml2 (or some othe lib) being linked against it. I
expect that Debian isn't doing this implicit linkage for us. In any
case we should rely on Fedora behaviour, so this patch looks reasonable
to me.

Daniel
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