Based on your questions from the LAM list, I think you are actually asking how to get support for MPI_THREAD_MULTIPLE (which will include pthread support on Linux systems).
 
Use the --enable-mpi-threads option to configure to enable support for MPI_THREAD_MULTIPLE (please see the README file for more details).  Per the warning from my previous mail (http://www.open-mpi.org/community/lists/users/2006/05/1309.php), this support is only partially implemented and tested.


From: users-bounces@open-mpi.org [mailto:users-bounces@open-mpi.org] On Behalf Of imran shaik
Sent: Friday, May 26, 2006 2:49 AM
To: openMPI mailing list
Subject: [OMPI users] Default configure options

Hi,
I want to use phtreads with openmpi.
Does it configure with pthreads enabled by default or what options do i need to mention?

Thanks,
Imran


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