Re: [Boost-build] GCC/x86_64 toolset(?) problems

From: Juergen Hunold (juergen.hunold_at_[hidden])
Date: 2008-08-29 02:45:51

Hi Dave !

On Friday 29 August 2008 06:36:09 David Abrahams wrote:
> on Thu Aug 28 2008, Vladimir Prus <ghost-AT-cs.msu.su> wrote:
> > On Thursday 28 August 2008 01:00:40 Juergen Hunold wrote:
> >> On Wednesday 27 August 2008 21:53:53 David Abrahams wrote:
> >> > Hi,
> >> >
> >> > I've been trying to run the Boost 1.35.0 tests with GCC on Suse Linux
> >> > Enterprise Server 10/AMD64, and there are some failures that indicate
> >> > we got something wrong somewhere.

Well, I shouldn't post half asleep :-((

> >> Well, x86_64 gcc targets sometimes requires -fPIC even for static
> >> builds.
> >
> > Rather, shared objects must be fully PIC, embedding some
> > non-PIC code (say from a static library) into a shared library is not OK.
> > So one solution is to build everything with -fPIC; but it won't help with
> > linking to system expat, although the changeset that Dave mentioned:
> >
> > 	http://svn.boost.org/trac/boost/changeset/47719
> >
> > should fix that.

Volodya is right, of course. _All_ shared libraries must be compiled with -
fPIC for x86_64. Thats the core of it.

> Unfortunately, I'm having the same problem building the MPI library and
> there's nothing obvious that's being linked into it statically, so I
> can't find a similar change that will solve my problem.

I had similar problems with SuSE 10.2 (and some with 10.3). This seems to be 
due to the fact the vendor MPI libraries are compiled without -fPIC. In 10.2 
(or 10.1) even expat has been compiled without -fPIC, leaving the BGL graph 
readers unavailable.  
I'm now running 11.0 at work and it seems they finally got it right this time.

If you want to use MPI on an older SuSE, I fear you might have to compile it 
yourself :-((

Yours,

Jürgen
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