In order to cope with changes to the MPI Standard, there are both compile-time and run-time ways to determine which version of the standard is in use in the environment one is using.
The ``version'' will be represented by two separate integers, for the version and subversion:
In C and C++,
#define MPI_VERSION 1 #define MPI_SUBVERSION 2in Fortran,
INTEGER MPI_VERSION, MPI_SUBVERSION PARAMETER (MPI_VERSION = 1) PARAMETER (MPI_SUBVERSION = 2)
For runtime determination,
MPI_GET_VERSION( version, subversion )
[ OUT version] version number (integer)
[ OUT subversion] subversion number (integer)
int MPI_Get_version(int *version, int *subversion)
MPI_GET_VERSION(VERSION, SUBVERSION, IERROR)
INTEGER VERSION, SUBVERSION, IERROR
MPI_GET_VERSION is one of the few functions that can be called before MPI_INIT and after MPI_FINALIZE. Its C++ binding can be found in the Annex, Section C++ Bindings for New 1.2 Functions .