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Date: Sat, 11 Feb 2006 15:26:27 +0000
From: Alexander Kabaev <kan@freebsd.org>
To: Daniel Eischen <deischen@freebsd.org>
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References: <20060211071552.GA99012@troutmask.apl.washington.edu>
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Cc: freebsd-current@freebsd.org, Steve Kargl <sgk@troutmask.apl.washington.edu>
Subject: Re: [jakub@redhat.com:Linking against libpthread via -pthread?
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On Sat, Feb 11, 2006 at 09:39:08AM -0500, Daniel Eischen wrote:
> On Fri, 10 Feb 2006, Steve Kargl wrote:
> 
> > On Sat, Feb 11, 2006 at 01:21:48AM -0500, Daniel Eischen wrote:
> > > On Fri, 10 Feb 2006, Alexander Kabaev wrote:
> > > >
> > > > No. The change to link in libc by default and libpthread with -pthread
> > > > are inthe works and will be committed shortly. There is not way around
> > > > this if we want working versioned libc and libpthread in our system.
> > >
> > > Why is that?  We really don't want -pthread to build in libpthread
> > > dependency when linking shared libraries.
> >
> > Uh, well, you do if you want to use GCC 4.2.X
> 
> Why?  If one _really_ needs a shared library linked to libpthread,
> -lpthread will always work.
> 
> -- 
> DE
> 
Just think for a moment how exactly will your shared library depend
on a specific symbol version in C or thread libraries if no
dependencies on libc.so.6 and libpthread.so.2 were recorded in the
first place? When no -lc or -lpthreed were seen by ld at all?
The symbol is defined by a name, version and library's SONAME.

--
Alexander Kabaev