Unfortunately, binary compatibility between Open MPI release versions has never been guaranteed (even between subreleases).

That being said, we have fixed this issue and expect to support binary compatibility between Open MPI releases starting with v1.3.2 (v1.3.1 should be released soon; we're aiming for v1.3.2 towards the beginning of next month).



On Mar 10, 2009, at 11:59 AM, Serge wrote:

Hello,

We have a number of applications built with Open MPI 1.2 in a shared
multi-user environment. The Open MPI library upgrade has been always
transparent and painless within the v1.2 branch. Now we would like to
switch to Open MPI 1.3 as seamlessly. However, an application built with ompi v1.2 will not run with the 1.3 library; the typical error messages
are given below. Apparently, the type ompi_communicator_t has changed.

Symbol `ompi_mpi_comm_null' has different size in shared object,
consider re-linking
Symbol `ompi_mpi_comm_world' has different size in shared object,
consider re-linking

Do I have to rebuild all the applications with Open MPI 1.3?

Is there a better way to do a smooth upgrade?

Thank you.

= Serge

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Jeff Squyres
Cisco Systems

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