.\" -*- nroff -*-
.\" Copyright (c) 2010-2012 Cisco Systems, Inc.  All rights reserved.
.\" Copyright 2006-2008 Sun Microsystems, Inc.
.\" Copyright (c) 1996 Thinking Machines Corporation
.\" Copyright (c) 2020      Google, LLC. All rights reserved.
.\" $COPYRIGHT$
.TH MPI_Get_version 3 "#OMPI_DATE#" "#PACKAGE_VERSION#" "#PACKAGE_NAME#"
.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 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.
.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.