Compiling MPI Programs

OpenMPI and Intel MPI (IMPI) are implementations of the Message-Passing Interface (MPI) standard. Libraries for these MPI implementations and compilers for C, C++, and Fortran are available on all clusters.

MPI programs require including a header file:
Language	Header Files
Fortran 77	`INCLUDE 'mpif.h'`
Fortran 90	`INCLUDE 'mpif.h'`
Fortran 95	`INCLUDE 'mpif.h'`
C	`#include <mpi.h>`
C++	`#include <mpi.h>`

Here are a few sample programs using MPI:

To see the available MPI libraries:

$ module avail openmpi 
$ module avail impi

The following table illustrates how to compile your MPI program. Any compiler flags accepted by Intel ifort/icc compilers are compatible with their respective MPI compiler.
Language	Intel MPI	OpenMPI
Fortran 77	`$ mpiifort program.f -o program`	`$ mpif77 program.f -o program`
Fortran 90	`$ mpiifort program.f90 -o program`	`$ mpif90 program.f90 -o program`
Fortran 95	`$ mpiifort program.f95 -o program`	`$ mpif90 program.f95 -o program`
C	`$ mpiicc program.c -o program`	`$ mpicc program.c -o program`
C++	`$ mpiicpc program.C -o program`	`$ mpiCC program.C -o program`

The Intel and GNU compilers will not output anything for a successful compilation. Also, the Intel compiler does not recognize the suffix ".f95".

Here is some more documentation from other sources on the MPI libraries: