How can I check out the version of openmpi?

Question

I tried to compile my code with OpenMPI server but I want to read the proper documentation of OpenMPI. So how can I know its version?

Answer 1

OpenMPI makes it very easy to run ompi_info; and you will be getting the information you want in the first few lines. You can try out OMPI_MAJOR_VERSION, OMPI_MINOR_VERSION, and OMPI_RELEASE_VERSION in mpi.h. But this does not work with MPICH2 or other MPI implementations. 
 

If we look at it more standardly, as part of MPI-3, there is a standard MPI routine called MPI_Get_library_version which gives you minute detailed library information at runtime.