Jody, With the gnu compilers the -m32 flag works. With other compilire's the same or other flag should work.
Doug Reeder On Feb 1, 2011, at 11:46 PM, jody wrote: > Thanks for your reply. > > If i try your suggestion, every process fails with the following message: > > *** The MPI_Init() function was called before MPI_INIT was invoked. > *** This is disallowed by the MPI standard. > *** Your MPI job will now abort. > [aim-triops:15460] Abort before MPI_INIT completed successfully; not > able to guarantee that all other processes were killed! > > I think this is caused by the fact that on the 64Bit machine Open MPI > is also built as a 64 bit application. > How can i force OpenMPI to be built as a 32Bit application on a 64Bit machine? > > Thank You > Jody > > On Tue, Feb 1, 2011 at 9:00 PM, David Mathog <mat...@caltech.edu> wrote: >> >>> I have sofar used a homogenous 32-bit cluster. >>> Now i have added a new machine which is 64 bit >>> >>> This means i have to reconfigure open MPI with >> `--enable-heterogeneous`, right? >> >> Not necessarily. If you don't need the 64bit capabilities you could run >> 32 bit binaries along with a 32 bit version of OpenMPI. At least that >> approach has worked so far for me. >> >> Regards, >> >> David Mathog >> mat...@caltech.edu >> Manager, Sequence Analysis Facility, Biology Division, Caltech >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users >> > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
