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# ===========================================================================
# http://www.gnu.org/software/autoconf-archive/ax_mpi.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_MPI([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
#
# DESCRIPTION
#
# This macro tries to find out how to compile programs that use MPI
# (Message Passing Interface), a standard API for parallel process
# communication (see http://www-unix.mcs.anl.gov/mpi/)
#
# On success, it sets the MPICC, MPICXX, MPIF77, or MPIFC output variable
# to the name of the MPI compiler, depending upon the current language.
# (This may just be $CC/$CXX/$F77/$FC, but is more often something like
# mpicc/mpiCC/mpif77/mpif90.) It also sets MPILIBS to any libraries that
# are needed for linking MPI (e.g. -lmpi or -lfmpi, if a special
# MPICC/MPICXX/MPIF77/MPIFC was not found).
#
# If you want to compile everything with MPI, you should use something
# like this for C:
#
# if test -z "$CC" && test -n "$MPICC"; then
# CC="$MPICC"
# fi
# AC_PROG_CC
# AX_MPI
# CC="$MPICC"
# LIBS="$MPILIBS $LIBS"
#
# and similar for C++ (change all instances of CC to CXX), Fortran 77
# (with F77 instead of CC) or Fortran (with FC instead of CC).
#
# NOTE: The above assumes that you will use $CC (or whatever) for linking
# as well as for compiling. (This is the default for automake and most
# Makefiles.)
#
# The user can force a particular library/compiler by setting the
# MPICC/MPICXX/MPIF77/MPIFC and/or MPILIBS environment variables.
#
# ACTION-IF-FOUND is a list of shell commands to run if an MPI library is
# found, and ACTION-IF-NOT-FOUND is a list of commands to run if it is not
# found. If ACTION-IF-FOUND is not specified, the default action will
# define HAVE_MPI.
#
# LICENSE
#
# Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
# Copyright (c) 2008 Julian C. Cummings <cummings@cacr.caltech.edu>
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation, either version 3 of the License, or (at your
# option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/>.
#
# As a special exception, the respective Autoconf Macro's copyright owner
# gives unlimited permission to copy, distribute and modify the configure
# scripts that are the output of Autoconf when processing the Macro. You
# need not follow the terms of the GNU General Public License when using
# or distributing such scripts, even though portions of the text of the
# Macro appear in them. The GNU General Public License (GPL) does govern
# all other use of the material that constitutes the Autoconf Macro.
#
# This special exception to the GPL applies to versions of the Autoconf
# Macro released by the Autoconf Archive. When you make and distribute a
# modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well.
#serial 7
AU_ALIAS([ACX_MPI], [AX_MPI])
AC_DEFUN([AX_MPI], [
AC_PREREQ(2.50) dnl for AC_LANG_CASE
AC_LANG_CASE([C], [
AC_REQUIRE([AC_PROG_CC])
AC_ARG_VAR(MPICC,[MPI C compiler command])
AC_CHECK_PROGS(MPICC, mpicc hcc mpxlc_r mpxlc mpcc cmpicc, $CC)
ax_mpi_save_CC="$CC"
CC="$MPICC"
AC_SUBST(MPICC)
],
[C++], [
AC_REQUIRE([AC_PROG_CXX])
AC_ARG_VAR(MPICXX,[MPI C++ compiler command])
AC_CHECK_PROGS(MPICXX, mpic++ mpicxx mpiCC hcp mpxlC_r mpxlC mpCC cmpic++, $CXX)
ax_mpi_save_CXX="$CXX"
CXX="$MPICXX"
AC_SUBST(MPICXX)
],
[Fortran 77], [
AC_REQUIRE([AC_PROG_F77])
AC_ARG_VAR(MPIF77,[MPI Fortran 77 compiler command])
AC_CHECK_PROGS(MPIF77, mpif77 hf77 mpxlf_r mpxlf mpf77 cmpifc, $F77)
ax_mpi_save_F77="$F77"
F77="$MPIF77"
AC_SUBST(MPIF77)
],
[Fortran], [
AC_REQUIRE([AC_PROG_FC])
AC_ARG_VAR(MPIFC,[MPI Fortran compiler command])
AC_CHECK_PROGS(MPIFC, mpif90 mpxlf95_r mpxlf90_r mpxlf95 mpxlf90 mpf90 cmpif90c, $FC)
ax_mpi_save_FC="$FC"
FC="$MPIFC"
AC_SUBST(MPIFC)
])
if test x = x"$MPILIBS"; then
AC_LANG_CASE([C], [AC_CHECK_FUNC(MPI_Init, [MPILIBS=" "])],
[C++], [AC_CHECK_FUNC(MPI_Init, [MPILIBS=" "])],
[Fortran 77], [AC_MSG_CHECKING([for MPI_Init])
AC_LINK_IFELSE([AC_LANG_PROGRAM([],[ call MPI_Init])],[MPILIBS=" "
AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no)])],
[Fortran], [AC_MSG_CHECKING([for MPI_Init])
AC_LINK_IFELSE([AC_LANG_PROGRAM([],[ call MPI_Init])],[MPILIBS=" "
AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no)])])
fi
AC_LANG_CASE([Fortran 77], [
if test x = x"$MPILIBS"; then
AC_CHECK_LIB(fmpi, MPI_Init, [MPILIBS="-lfmpi"])
fi
if test x = x"$MPILIBS"; then
AC_CHECK_LIB(fmpich, MPI_Init, [MPILIBS="-lfmpich"])
fi
],
[Fortran], [
if test x = x"$MPILIBS"; then
AC_CHECK_LIB(fmpi, MPI_Init, [MPILIBS="-lfmpi"])
fi
if test x = x"$MPILIBS"; then
AC_CHECK_LIB(mpichf90, MPI_Init, [MPILIBS="-lmpichf90"])
fi
])
if test x = x"$MPILIBS"; then
AC_CHECK_LIB(mpi, MPI_Init, [MPILIBS="-lmpi"])
fi
if test x = x"$MPILIBS"; then
AC_CHECK_LIB(mpich, MPI_Init, [MPILIBS="-lmpich"])
fi
dnl We have to use AC_TRY_COMPILE and not AC_CHECK_HEADER because the
dnl latter uses $CPP, not $CC (which may be mpicc).
AC_LANG_CASE([C], [if test x != x"$MPILIBS"; then
AC_MSG_CHECKING([for mpi.h])
AC_TRY_COMPILE([#include <mpi.h>],[],[AC_MSG_RESULT(yes)], [MPILIBS=""
AC_MSG_RESULT(no)])
fi],
[C++], [if test x != x"$MPILIBS"; then
AC_MSG_CHECKING([for mpi.h])
AC_TRY_COMPILE([#include <mpi.h>],[],[AC_MSG_RESULT(yes)], [MPILIBS=""
AC_MSG_RESULT(no)])
fi],
[Fortran 77], [if test x != x"$MPILIBS"; then
AC_MSG_CHECKING([for mpif.h])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[ include 'mpif.h'])],[AC_MSG_RESULT(yes)], [MPILIBS=""
AC_MSG_RESULT(no)])
fi],
[Fortran], [if test x != x"$MPILIBS"; then
AC_MSG_CHECKING([for mpif.h])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[ include 'mpif.h'])],[AC_MSG_RESULT(yes)], [MPILIBS=""
AC_MSG_RESULT(no)])
fi])
AC_LANG_CASE([C], [CC="$ax_mpi_save_CC"],
[C++], [CXX="$ax_mpi_save_CXX"],
[Fortran 77], [F77="$ax_mpi_save_F77"],
[Fortran], [FC="$ax_mpi_save_FC"])
AC_SUBST(MPILIBS)
# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
if test x = x"$MPILIBS"; then
$2
:
else
ifelse([$1],,[AC_DEFINE(HAVE_MPI,1,[Define if you have the MPI library.])],[$1])
:
fi
])dnl AX_MPI
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