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Subject: [OMPI users] Creating 64-bit objects?
From: Price, Brian M (N-KCI) (brian.m.price_at_[hidden])
Date: 2010-11-09 14:34:43


OpenMPI version: 1.3.3 & 1.4.3
Platform: IBM P5
Issue: I want OpenMPI to support some existing 64-bit FORTRAN software, but I can't seem to get 64-bit objects from OpenMPI without some modification to the Makefile in ompi/mpi/f90.
I can configure, build, and install just fine with the following compilers:

- CC = xlC_r

- CXX = xlC_r

- F77 = xlf95_r

- FC = xlf95_r
But, this configuration produces 32-bit objects for all languages.
So, to produce 64-bit objects for all languages, I supply the following flags:

- CFLAGS = -q64

- CXXFLAGS = -q64

- FFLAGS = -q64

- FCFLAGS = -q64
This configuration results in the following error during the build (more specifically, link) phase:

- When creating libmpi_f90.la in ompi/mpi/f90

- COMMANDS:

o /bin/sh ../../../libtool --mode=link xlf95_r -I../../../ompi/include -I../../../ompi/include -I. -I. -I../../../ompi/mpi/f90 -q64 -version-info 0:1:0 -export-dynamic -o libmpi_f90.la -rpath <prefix>/lib mpi.lo mpi_sizeof.lo mpi_comm_spawn_multiple_f90.lo mpi_testall_f90.lo mpi_testsome_f90.lo mpi_waitall_f90.lo mpi_waitsome_f90.lo mpi_wtick_f90.lo mpi_wtime_f90.lo ../../../ompi/libmpi.la -lnsl -lutil

o libtool: link: /usr/bin/ld -m elf64ppc -shared .libs/mpi.o .libs/mpi_sizeof.o .libs/mpi_comm_spawn_multiple_f90.o .libs/mpi_testall_f90.o .libs/mpi_testsome_f90.o .libs/mpi_waitall_f90.o .libs/mpi_waitsome_f90.o .libs/mpi_wtick_f90.o .libs/mpi_wtime_f90.lo -L<topdir>/orte/.libs -L<topdir>/opal/.libs ../../../ompi/.libs/libmpi.so <topdir>/orte/.libs/libopen-rte.so <topdir>/opal/.libs/libopen-pal.so -ldl -lnsl -lutil -q64 -soname libmpi_f90.so.0 -o .libs/libmpi_f90.so.0.0.1

- OUTPUT:
/usr/bin/ld: unrecognized option '-q64'
/usr/bin/ld: use the --help option for usage information
make[4]: *** [libmpi_f90.la] Error 1
make[4]: Leaving directory `<topdir>/ompi/mpi/f90`
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `<topdir>/ompi/mpi/f90`
make[2]: *** [all] Error 2
make[2]: Leaving directory `<topdir>/ompi/mpi/f90`
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `<topdir>/ompi`
make: *** [all-recursive] Error 1

The -q64 option, while valid for the xlf95_r compiler, is not a valid option for /usr/bin/ld. So, I'm wondering why this option got passed to /usr/bin/ld. After looking at <topdir>/ompi/mpi/f90/Makefile, I see that FCFLAGS shows up in link lines ("libmpi_f90_la_LINK" and "FCLINK"). This direction seems to come from Makefile.in.
If I remove these FCFLAGS references from the Makefile, I am able to complete the build and install of OpenMPI, and it seems to correctly support my existing software.
So, now for my question:
Should FCFLAGS show up on these links lines and, if so, how would I get 64-bit objects?
Thanks,
Brian Price