[mpich2-dev] A request about MPE related to shared libraries

[chan at mcs.anl.gov]

Hi Lisandro,

Thanks for enabling MPE logging for MPI in python.

I can certainly add -fPIC in compiling MPE when MPICH2 runs in
shared library building mode.  Since not all compiler accepts
-fPIC, I would like to find out more what is your need first
before making any configury changes.  Maybe we should talk off
the list, you could email me directly at chan at mcs.anl.gov

A.Chan
   
----- "Lisandro Dalcin" <dalcinl at gmail.com> wrote:

> In this post I announced users of mpi4py about support for MPE:
> 
> http://groups.google.com/group/mpi4py/browse_thread/thread/a5e2f35f4cb4ad16
> 
> The nice thing is that I'm able to activate logging of MPI calls at
> runtime by pre-dlopen()'ing the Python extension module with MPE
> symbols (needed the -Wl,-whole-archive to force the linker add the
> whole stuff in liblmpe.a)
> 
> However, I'm pretty sure that people will run intro trouble because
> the MPE code what not built with -fPIC... In fact, I'm having such
> trouble with the centrally installed MPICH2 in our cluster (easy to
> fix, I just need to rebuild with ./configure CFLAGS=-fPIC), and the
> same happens with the RPM package from Fedora 11 (and there is
> nothing
> I can do about this and all others distros out there)
> 
> So... What do you think about using -fPIC to build MPE sources when
> the user asked configure to build shared libraries?
> 
> 
> 
> -- 
> Lisandro Dalcín
> ---------------
> Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC)
> Instituto de Desarrollo Tecnológico para la Industria Química (INTEC)
> Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
> PTLC - Güemes 3450, (3000) Santa Fe, Argentina
> Tel/Fax: +54-(0)342-451.1594