dnl  Copyright (C) 2007-2008  CEA/DEN, EDF R&D, OPEN CASCADE
dnl
dnl  Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
dnl  CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
dnl
dnl  This library is free software; you can redistribute it and/or
dnl  modify it under the terms of the GNU Lesser General Public
dnl  License as published by the Free Software Foundation; either
dnl  version 2.1 of the License.
dnl
dnl  This library is distributed in the hope that it will be useful,
dnl  but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
dnl  Lesser General Public License for more details.
dnl
dnl  You should have received a copy of the GNU Lesser General Public
dnl  License along with this library; if not, write to the Free Software
dnl  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
dnl
dnl  See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
dnl
AC_DEFUN([CHECK_MPI],[

AC_REQUIRE([AC_PROG_CC])dnl

AC_ARG_WITH(mpi_lib,
   [AC_HELP_STRING([--with-mpi_lib=DIR],[directory path of MPICH lib installation])],
   MPILIBREQUESTED="$withval")

AC_ARG_WITH(mpi,
   [AC_HELP_STRING([--with-mpi=DIR],[root directory path of MPICH installation])],
   MPIREQUESTED="yes",MPIREQUESTED="no")

MPI_INCLUDES=""
MPI_LIBS=""
WITHMPI=no
mpi_ok=no
if test x"$MPIREQUESTED" = xyes; then

  echo
  echo ---------------------------------------------
  echo testing mpi
  echo ---------------------------------------------
  echo

  if test "x$withval" != "xyes"; then
    MPI_HOME=$withval
    MPI_INCLUDES="-I$MPI_HOME/include"
    if test "x$MPI_HOME" = "x/usr"
    then
      MPI_LIBS=""
    else
      MPI_LIBS="-L$MPI_HOME/lib"
    fi
  fi

  if test x"$MPILIBREQUESTED" != x; then
    MPI_LIBS="-L$MPILIBREQUESTED"
  fi

  CPPFLAGS_old="$CPPFLAGS"
  CPPFLAGS="$MPI_INCLUDES $CPPFLAGS"
  AC_CHECK_HEADER(mpi.h,WITHMPI="yes",WITHMPI="no")
  CPPFLAGS="$CPPFLAGS_old"

  if test "$WITHMPI" = "yes";then
    LIBS_old="$LIBS"
    LDFLAGS_old="$LDFLAGS"
    LDFLAGS="$MPI_LIBS $LDFLAGS"
    AC_CHECK_LIB(elan,elan_init,MPI_LIBS="$MPI_LIBS -lelan")
    AC_CHECK_LIB(mpi,MPI_Init,WITHMPI="yes",WITHMPI="no")
    AC_CHECK_LIB(mpi,MPI_Publish_name,WITHMPI2="yes",WITHMPI2="no")
    LDFLAGS="$LDFLAGS_old"
    LIBS="$LIBS_old"
  fi

  if test "$WITHMPI" = "yes";then
    mpi_ok=yes
    MPI_LIBS="$MPI_LIBS -lmpi -lmpio -lmpiCC"
  else
    mpi_ok=no
  fi

fi

if test "$WITHMPI" = no; then
dnl
dnl ---------------------------------------------
dnl testing MPICH
dnl ---------------------------------------------
dnl

  CHECK_MPICH

  if test "$WITHMPICH" = no; then
dnl
dnl ---------------------------------------------
dnl testing LAM
dnl ---------------------------------------------
dnl

    CHECK_LAM

  fi

  if test "$WITHLAM" = no; then
dnl
dnl ---------------------------------------------
dnl testing OPENMPI
dnl ---------------------------------------------
dnl

    CHECK_OPENMPI

  fi

fi

if test x$WITHMPI2 = xyes; then
  CPPFLAGS="-DHAVE_MPI2 $CPPFLAGS"
  CORBA_IDLCXXFLAGS="-DHAVE_MPI2 $CORBA_IDLCXXFLAGS"
  CORBA_IDLPYFLAGS="-DHAVE_MPI2 $CORBA_IDLPYFLAGS"
fi

AC_SUBST(WITHMPI)
AC_SUBST(MPI_INCLUDES)
AC_SUBST(MPI_LIBS)
AC_SUBST(mpi_ok)
AM_CONDITIONAL(MPI_IS_OK, [test x"$mpi_ok" = xyes])
])dnl