| 1 | # ===========================================================================
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| 2 | # http://www.nongnu.org/autoconf-archive/acx_mpi.html
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| 3 | # ===========================================================================
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| 4 | #
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| 5 | # SYNOPSIS
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| 6 | #
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| 7 | # ACX_MPI([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
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| 8 | #
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| 9 | # DESCRIPTION
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| 10 | #
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| 11 | # This macro tries to find out how to compile programs that use MPI
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| 12 | # (Message Passing Interface), a standard API for parallel process
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| 13 | # communication (see http://www-unix.mcs.anl.gov/mpi/)
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| 14 | #
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| 15 | # On success, it sets the MPICC, MPICXX, MPIF77, or MPIFC output variable
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| 16 | # to the name of the MPI compiler, depending upon the current language.
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| 17 | # (This may just be $CC/$CXX/$F77/$FC, but is more often something like
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| 18 | # mpicc/mpiCC/mpif77/mpif90.) It also sets MPILIBS to any libraries that
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| 19 | # are needed for linking MPI (e.g. -lmpi or -lfmpi, if a special
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| 20 | # MPICC/MPICXX/MPIF77/MPIFC was not found).
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| 21 | #
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| 22 | # If you want to compile everything with MPI, you should set:
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| 23 | #
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| 24 | # CC="MPICC" #OR# CXX="MPICXX" #OR# F77="MPIF77" #OR# FC="MPIFC"
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| 25 | # LIBS="$MPILIBS $LIBS"
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| 26 | #
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| 27 | # NOTE: The above assumes that you will use $CC (or whatever) for linking
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| 28 | # as well as for compiling. (This is the default for automake and most
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| 29 | # Makefiles.)
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| 30 | #
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| 31 | # The user can force a particular library/compiler by setting the
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| 32 | # MPICC/MPICXX/MPIF77/MPIFC and/or MPILIBS environment variables.
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| 33 | #
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| 34 | # ACTION-IF-FOUND is a list of shell commands to run if an MPI library is
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| 35 | # found, and ACTION-IF-NOT-FOUND is a list of commands to run if it is not
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| 36 | # found. If ACTION-IF-FOUND is not specified, the default action will
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| 37 | # define HAVE_MPI.
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| 38 | #
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| 39 | # LICENSE
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| 40 | #
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| 41 | # Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
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| 42 | # Copyright (c) 2008 Julian C. Cummings <cummings@cacr.caltech.edu>
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| 43 | #
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| 44 | # This program is free software: you can redistribute it and/or modify it
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| 45 | # under the terms of the GNU General Public License as published by the
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| 46 | # Free Software Foundation, either version 3 of the License, or (at your
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| 47 | # option) any later version.
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| 48 | #
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| 49 | # This program is distributed in the hope that it will be useful, but
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| 50 | # WITHOUT ANY WARRANTY; without even the implied warranty of
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| 51 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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| 52 | # Public License for more details.
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| 53 | #
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| 54 | # You should have received a copy of the GNU General Public License along
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| 55 | # with this program. If not, see <http://www.gnu.org/licenses/>.
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| 56 | #
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| 57 | # As a special exception, the respective Autoconf Macro's copyright owner
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| 58 | # gives unlimited permission to copy, distribute and modify the configure
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| 59 | # scripts that are the output of Autoconf when processing the Macro. You
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| 60 | # need not follow the terms of the GNU General Public License when using
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| 61 | # or distributing such scripts, even though portions of the text of the
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| 62 | # Macro appear in them. The GNU General Public License (GPL) does govern
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| 63 | # all other use of the material that constitutes the Autoconf Macro.
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| 64 | #
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| 65 | # This special exception to the GPL applies to versions of the Autoconf
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| 66 | # Macro released by the Autoconf Archive. When you make and distribute a
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| 67 | # modified version of the Autoconf Macro, you may extend this special
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| 68 | # exception to the GPL to apply to your modified version as well.
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| 69 |
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| 70 | AC_DEFUN([ACX_MPI], [
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| 71 | AC_PREREQ(2.50) dnl for AC_LANG_CASE
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| 72 |
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| 73 | AC_LANG_CASE([C], [
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| 74 | AC_REQUIRE([AC_PROG_CC])
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| 75 | AC_ARG_VAR(MPICC,[MPI C compiler command])
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| 76 | AC_CHECK_PROGS(MPICC, mpicc hcc mpxlc_r mpxlc mpcc cmpicc, $CC)
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| 77 | acx_mpi_save_CC="$CC"
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| 78 | CC="$MPICC"
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| 79 | AC_SUBST(MPICC)
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| 80 | ],
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| 81 | [C++], [
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| 82 | AC_REQUIRE([AC_PROG_CXX])
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| 83 | AC_ARG_VAR(MPICXX,[MPI C++ compiler command])
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| 84 | AC_CHECK_PROGS(MPICXX, mpic++ mpicxx mpiCC hcp mpxlC_r mpxlC mpCC cmpic++, $CXX)
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| 85 | acx_mpi_save_CXX="$CXX"
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| 86 | CXX="$MPICXX"
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| 87 | AC_SUBST(MPICXX)
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| 88 | ],
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| 89 | [Fortran 77], [
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| 90 | AC_REQUIRE([AC_PROG_F77])
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| 91 | AC_ARG_VAR(MPIF77,[MPI Fortran 77 compiler command])
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| 92 | AC_CHECK_PROGS(MPIF77, mpif77 hf77 mpxlf_r mpxlf mpf77 cmpifc, $F77)
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| 93 | acx_mpi_save_F77="$F77"
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| 94 | F77="$MPIF77"
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| 95 | AC_SUBST(MPIF77)
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| 96 | ],
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| 97 | [Fortran], [
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| 98 | AC_REQUIRE([AC_PROG_FC])
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| 99 | AC_ARG_VAR(MPIFC,[MPI Fortran compiler command])
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| 100 | AC_CHECK_PROGS(MPIFC, mpif90 mpxlf95_r mpxlf90_r mpxlf95 mpxlf90 mpf90 cmpif90c, $FC)
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| 101 | acx_mpi_save_FC="$FC"
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| 102 | FC="$MPIFC"
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| 103 | AC_SUBST(MPIFC)
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| 104 | ])
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| 105 |
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| 106 | if test x = x"$MPILIBS"; then
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| 107 | AC_LANG_CASE([C], [AC_CHECK_FUNC(MPI_Init, [MPILIBS=" "])],
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| 108 | [C++], [AC_CHECK_FUNC(MPI_Init, [MPILIBS=" "])],
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| 109 | [Fortran 77], [AC_MSG_CHECKING([for MPI_Init])
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| 110 | AC_LINK_IFELSE([AC_LANG_PROGRAM([],[ call MPI_Init])],[MPILIBS=" "
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| 111 | AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no)])],
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| 112 | [Fortran], [AC_MSG_CHECKING([for MPI_Init])
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| 113 | AC_LINK_IFELSE([AC_LANG_PROGRAM([],[ call MPI_Init])],[MPILIBS=" "
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| 114 | AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no)])])
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| 115 | fi
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| 116 | AC_LANG_CASE([Fortran 77], [
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| 117 | if test x = x"$MPILIBS"; then
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| 118 | AC_CHECK_LIB(fmpi, MPI_Init, [MPILIBS="-lfmpi"])
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| 119 | fi
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| 120 | if test x = x"$MPILIBS"; then
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| 121 | AC_CHECK_LIB(fmpich, MPI_Init, [MPILIBS="-lfmpich"])
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| 122 | fi
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| 123 | ],
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| 124 | [Fortran], [
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| 125 | if test x = x"$MPILIBS"; then
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| 126 | AC_CHECK_LIB(fmpi, MPI_Init, [MPILIBS="-lfmpi"])
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| 127 | fi
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| 128 | if test x = x"$MPILIBS"; then
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| 129 | AC_CHECK_LIB(mpichf90, MPI_Init, [MPILIBS="-lmpichf90"])
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| 130 | fi
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| 131 | ])
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| 132 | if test x = x"$MPILIBS"; then
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| 133 | AC_CHECK_LIB(mpi, MPI_Init, [MPILIBS="-lmpi"])
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| 134 | fi
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| 135 | if test x = x"$MPILIBS"; then
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| 136 | AC_CHECK_LIB(mpich, MPI_Init, [MPILIBS="-lmpich"])
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| 137 | fi
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| 138 |
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| 139 | dnl We have to use AC_TRY_COMPILE and not AC_CHECK_HEADER because the
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| 140 | dnl latter uses $CPP, not $CC (which may be mpicc).
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| 141 | AC_LANG_CASE([C], [if test x != x"$MPILIBS"; then
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| 142 | AC_MSG_CHECKING([for mpi.h])
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| 143 | AC_TRY_COMPILE([#include <mpi.h>],[],[AC_MSG_RESULT(yes)], [MPILIBS=""
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| 144 | AC_MSG_RESULT(no)])
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| 145 | fi],
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| 146 | [C++], [if test x != x"$MPILIBS"; then
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| 147 | AC_MSG_CHECKING([for mpi.h])
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| 148 | AC_TRY_COMPILE([#include <mpi.h>],[],[AC_MSG_RESULT(yes)], [MPILIBS=""
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| 149 | AC_MSG_RESULT(no)])
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| 150 | fi],
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| 151 | [Fortran 77], [if test x != x"$MPILIBS"; then
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| 152 | AC_MSG_CHECKING([for mpif.h])
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| 153 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[ include 'mpif.h'])],[AC_MSG_RESULT(yes)], [MPILIBS=""
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| 154 | AC_MSG_RESULT(no)])
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| 155 | fi],
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| 156 | [Fortran], [if test x != x"$MPILIBS"; then
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| 157 | AC_MSG_CHECKING([for mpif.h])
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| 158 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[ include 'mpif.h'])],[AC_MSG_RESULT(yes)], [MPILIBS=""
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| 159 | AC_MSG_RESULT(no)])
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| 160 | fi])
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| 161 | dnl There are b0rked implementations that '#define main mpi_main' in their mpi.h
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| 162 | dnl which will cause all tests above to fail miserably (e.g. MPICH-SCore).
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| 163 | dnl TODO: prototype checking, exit instead of return from main, test C++, implement F77.
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| 164 | dnl TODO: use the information already gathered...
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| 165 | if test x = x"$MPILIBS"; then
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| 166 | AC_MSG_CHECKING([for last resort: compile and link a small MPI test program])
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| 167 | AC_LANG_CASE([C], [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <mpi.h>]], [[
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| 168 | int main(int argc, char **argv)
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| 169 | {
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| 170 | MPI_Init(&argc, &argv);
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| 171 | return 0;
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| 172 | }
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| 173 | ]])], [MPILIBS=" "
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| 174 | AC_MSG_RESULT(yes)],[AC_MSG_RESULT(no)])],
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| 175 | [C++], [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <mpi.h>]], [[
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| 176 | int main(int argc, char **argv)
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| 177 | {
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| 178 | MPI_Init(&argc, &argv);
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| 179 | return 0;
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| 180 | }
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| 181 | ]])], [MPILIBS=" "
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| 182 | AC_MSG_RESULT(yes)],[AC_MSG_RESULT(no)])],
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| 183 | [Fortran 77], [])
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| 184 | fi
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| 185 |
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| 186 | AC_LANG_CASE([C], [CC="$acx_mpi_save_CC"],
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| 187 | [C++], [CXX="$acx_mpi_save_CXX"],
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| 188 | [Fortran 77], [F77="$acx_mpi_save_F77"],
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| 189 | [Fortran], [FC="$acx_mpi_save_FC"])
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| 190 |
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| 191 | AC_SUBST(MPILIBS)
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| 192 |
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| 193 | # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
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| 194 | if test x = x"$MPILIBS"; then
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| 195 | $2
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| 196 | :
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| 197 | else
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| 198 | ifelse([$1],,[AC_DEFINE(HAVE_MPI,1,[Define if you have the MPI library.])],[$1])
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| 199 | :
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| 200 | fi
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| 201 | ])dnl ACX_MPI
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