Q-Logic IB6054601-00 D Manuel D’Utilisation

3 – Using InfiniPath MPI

InfiniPath MPI Details

IB6054601-00 D

3-9

Q

To use the Intel compiler for Fortran90/Fortran95 programs, use:

$ mpif90 -f90=ifort .....

$ mpif95 -f95=ifort .....

Usage for other compilers will be similar to the examples above, substituting the 
options following 

-cc

, 

-CC

, 

-f77

, 

-f90

, or 

-f95

. Consult the documentation for 

specific compilers for more details.

Also, use 

mpif77, mpif90,

 or 

mpif95

 for linking, otherwise you may have problems 

with

.true.

 having the wrong value. If you are not using the provided scripts for 

linking, you should link a sample program using the 

-show

 option as a test, to see 

what libraries to add to your link line. Some examples follow.

For Fortran90 programs:

$ mpif90 -f90=pgf90 -show pi3f90.f90 -o pi3f90

pgf90 -I/usr/include/mpich/pgi5/x86_64 -c -I/usr/include 

pi3f90.f90 -c

pgf90 pi3f90.o -o pi3f90 -lmpichf90 -lmpich -lmpichabiglue_pgi5

Fortran95 programs will be similar to the above.

For C programs:

$ mpicc -cc=pgcc -show cpi.c

pgcc -c cpi.c

pgcc cpi.o -lmpich -lpgftnrtl -lmpichabiglue_pgi5

If you use environment variables (e.g., $MPICH_CC) to select which compiler 

mpicc

, et al. should use, the scripts will also set the matching linker variable (e.g. 

$MPICH_CLINKER), if not already set. If both the environment variable and 
command line options are used (e.g, 

-cc=gcc

), the command line variable is used.

If both the compiler and linker variables are set, and they do not match for the 
compiler you are using, it is likely that the MPI program will fail to link, or if it links, 
it may not execute correctly. For a sample error message, please see 

in the Troubleshooting chapter.

The 2.x PathScale compilers aren’t currently supported on systems that use the 
GNU 4.x compilers and compiler environment (header files and libraries). This 
includes Fedora Core 4, Fedora Core 5 and SLES 10. The GNU 4.x environment 
will be supported in the PathScale Complier Suite 3.0 release.