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Autoconf Macro: acx_mpi
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<h1>
acx_mpi
</h1>
<h2>
Synopsis
</h2>
<p class="indent" style="white-space:nowrap;">
<code>ACX_MPI([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])</code>
</p>
<h2>
Description
</h2>
<div class="indent">
<p>
This macro tries to find out how to compile programs that use MPI (Message
Passing Interface), a standard API for parallel process communication (see
<a href=
"http://www-unix.mcs.anl.gov/mpi/">http://www-unix.mcs.anl.gov/mpi/</a>)
</p>
<p>
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).
</p>
<p>
If you want to compile everything with MPI, you should set:
</p>
<pre>
CC="MPICC" #OR# CXX="MPICXX" #OR# F77="MPIF77" #OR# FC="MPIFC"
LIBS="$MPILIBS $LIBS"
</pre>
<p>
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.)
</p>
<p>
The user can force a particular library/compiler by setting the
MPICC/MPICXX/MPIF77/MPIFC and/or MPILIBS environment variables.
</p>
<p>
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.
</p>
</div>
<h2>
Authors
</h2>
<p class="indent">
Steven G. Johnson <stevenj@alum.mit.edu> and Julian C. Cummings
<cummings@cacr.caltech.edu>.
</p>
<h2>
Last Modified
</h2>
<p class="indent">
2006-10-22
</p>
<h2>
M4 Source Code
</h2>
<div class="indent">
<pre class="m4source">
AC_DEFUN([ACX_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, $CC)
acx_mpi_save_CC="$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++, $CXX)
acx_mpi_save_CXX="$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, $F77)
acx_mpi_save_F77="$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, $FC)
acx_mpi_save_FC="$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"$MPILIBS"; then
AC_MSG_CHECKING([for mpif.h])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[ include 'mpif.h'])],[AC_MSG_RESULT(yes)], [MPILIBS=""
AC_MSG_RESULT(no)])
fi])
AC_LANG_CASE([C], [CC="$acx_mpi_save_CC"],
[C++], [CXX="$acx_mpi_save_CXX"],
[Fortran 77], [F77="$acx_mpi_save_F77"],
[Fortran], [FC="$acx_mpi_save_FC"])
AC_SUBST(MPILIBS)
# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
if test x = x"$MPILIBS"; then
$2
:
else
ifelse([$1],,[AC_DEFINE(HAVE_MPI,1,[Define if you have the MPI library.])],[$1])
:
fi
])dnl ACX_MPI
</pre>
</div>
<h2>
License
</h2>
<div class="indent">
<span style="white-space:nowrap;">Copyright © 2006 Steven G. Johnson
<stevenj@alum.mit.edu></span><br>
<span style="white-space:nowrap;">Copyright © 2006 Julian C. Cummings
<cummings@cacr.caltech.edu></span>
<p>
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 2 of the License, or (at your option)
any later version.
</p>
<p>
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.
</p>
<p>
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc., 59
Temple Place - Suite 330, Boston, MA 02111-1307, USA.
</p>
<p>
As a special exception, the respective Autoconf Macro's copyright owner
gives unlimited permission to copy, distribute and modify the configure
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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.
</p>
<p>
This special exception to the GPL applies to versions of the Autoconf Macro
released by the Autoconf Macro 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.
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