.\" -*- nroff -*-
.\" Copyright (c) 2010-2012 Cisco Systems, Inc.  All rights reserved.
.\" Copyright 2006-2008 Sun Microsystems, Inc.
.\" Copyright (c) 1996 Thinking Machines Corporation
.\" $COPYRIGHT$
.TH MPI_Get_version 3 "Sep 30, 2023" "4.1.6" "Open MPI"
.SH NAME
\fBMPI_Get_version\fP \- Returns the version of the standard corresponding to the current implementation.

.SH SYNTAX
.ft R
.SH C Syntax
.nf
#include <mpi.h>
int MPI_Get_version(int \fI*version\fP, int \fI*subversion\fP)

.fi
.SH Fortran Syntax
.nf
USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_GET_VERSION(\fIVERSION\fP, \fISUBVERSION\fP, \fIIERROR\fP)
	INTEGER	\fIVERSION\fP, \fISUBVERSION\fP, \fIIERROR\fP

.fi
.SH Fortran 2008 Syntax
.nf
USE mpi_f08
MPI_Get_version(\fIversion\fP, \fIsubversion\fP, \fIierror\fP)
	INTEGER, INTENT(OUT) :: \fIversion\fP, \fIsubversion\fP
	INTEGER, OPTIONAL, INTENT(OUT) :: \fIierror\fP

.fi
.SH C++ Syntax
.nf
#include <mpi.h>
void Get_version(int& \fIversion\fP, int& \fIsubversion\fP)

.fi
.SH OUTPUT PARAMETERS
.ft R
.TP 1i
version
The major version number of the corresponding standard (integer).

.ft R
.TP 1i
subversion
The minor version number of the corresponding standard (integer).

.ft R
.TP 1i
IERROR
Fortran only: Error status (integer).

.SH DESCRIPTION
.ft R
Since Open MPI is MPI 3.1 compliant, this function will return a version value of 3 and a subversion value of 1 for this release.

.SH NOTE
.ft R
MPI_Get_version is one of the few functions that can be called before MPI_Init and after MPI_Finalize.

.SH ERRORS
Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ functions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism will be used to throw an MPI::Exception object.
.sp
Before the error value is returned, the current MPI error handler is
called. By default, this error handler aborts the MPI job, except for I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.