167. Version Inquiries


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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    2 
    #define MPI_SUBVERSION 1
in Fortran, 
    INTEGER MPI_VERSION, MPI_SUBVERSION 
    PARAMETER (MPI_VERSION    = 2) 
    PARAMETER (MPI_SUBVERSION = 1)
For runtime determination,

MPI_GET_VERSION( version, subversion )
OUT versionversion number (integer)
OUT subversionsubversion number (integer)

int MPI_Get_version(int *version, int *subversion)

MPI_GET_VERSION(VERSION, SUBVERSION, IERROR)
INTEGER VERSION, SUBVERSION, IERROR
void MPI::Get_version(int& version, int& subversion)

MPI_GET_VERSION is one of the few functions that can be called before MPI_INIT and after MPI_FINALIZE. Valid ( MPI_VERSION, MPI_SUBVERSION) pairs in this and previous versions of the MPI standard are (2,1), (2,0), and (1,2).


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