OpenMPI
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Revision as of 17:34, 29 November 2012 by Albensoeder (talk | contribs) (Created page with "The OpenMPI library is an open source implementation for the MPI protocol. == Compiling with OpenMPI == Before compiling [[User environment - The usage of module|load the actual...")
The OpenMPI library is an open source implementation for the MPI protocol.
Compiling with OpenMPI
Before compiling load the actual module of OpenMPI, e.g.
module load openmpi/1.6.2/gcc/64/4.7.1
The compilation can be done by following wrappers of OpenMPI:
| Name | Description |
|---|---|
| mpicc | C compiler |
| mpic++, mpiCC or mpicxx | C++ compiler |
| mpif77 | Fortran 77 compiler |
| mpif90 | Fortran 90 compiler |
These programs are only wrappers which means that the scripts sets additional flags for OpenMPI (e.g. include path, flags for linking OpenMPI libraries, ...) use other compilers (e.g. GNU compiler, Intel Compiler). The compilers can be choosen by setting environment variables, e.g.
export OMPI_CC=icc
for using the Intel C compiler. Below there is a list of all environment variables for setting the compiler.
| Environment variable | Description |
|---|---|
| OMPI_CC | Set the C compiler |
| OMPI_CXX | Sets the C++ compiler |
| OMPI_F77 | Sets the Fortran 77 compiler |
| OMPI_FC | Sets the Fortran 90 compiler |
