mpi-config script that might by used to extract the compiler parameters for

MPI. This might be useful for those people who wnat to compile alugrid with
MPI and want to easily switch the compiler.

[[Imported from SVN: r4620]]

bin/mpi-config

+#!/bin/sh
+
+set -e
+
+version=0.1
+verbose=0
+
+usage()
+{
+  cat <<EOF
+Usage: mpi-config [OPTIONS] [LIBRARIES]
+Options:
+ [--mpicc[=COMPILER]]
+ [--disable-cxx]
+ [--verbose]
+ [--version]
+ [--mpiversion]
+ [--libs]
+ [--cflags]
+EOF
+  exit $1
+}
+
+if test $# -eq 0 ; then
+  usage 1 1>&2
+fi
+
+while test $# -gt 0 ; do
+  case "$1" in
+  -*=*) optarg=`echo "$1" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
+  *) optarg= ;;
+  esac
+
+  case $1 in
+  --mpicc=*)
+    MPICC=$optarg
+    ;;
+  --version)
+    echo $version
+    exit 0
+    ;;
+  --verbose)
+    verbose=1
+    ;;
+  --disable-cxx)
+    disablecxx=yes
+    ;;
+  --mpiversion)
+    tasks="$tasks print_mpiversion"
+    ;;
+  --cflags)
+    tasks="$tasks print_cflags"
+    ;;
+  --libs)
+    tasks="$tasks print_libs"
+    ;;
+  *)
+    usage 1 1>&2
+    ;;
+  esac
+  shift
+done
+
+if test x$MPICC == x ; then
+  MPICC=mpicc
+fi
+
+mpi_trybuild () {
+  $MPICC ${1} > /dev/null 2>&1 || return 1
+  return 0
+}
+
+mpi_preprocess () {
+  $MPICC -E -c ${1} 2> /dev/null
+}
+
+mpi_getflags () {
+  # -- call mpiCC, remove compiler name
+  # compiler-name is first word in line _if_ it doesn't start with a dash!
+  # needed because mpiCC sometimes does not include compiler (newer LAM)
+
+  # the additional brackets keep m4 from interpreting the brackets
+  # in the sed-command...
+  retval=`$MPICC ${1} ${2} 2>/dev/null | head -1 | sed -e 's/^[^-][^ ]\+ //'`
+  # remove dummy-parameter (if existing)
+  if test ${#} = 2 ; then
+    retval=`echo $retval | sed -e "s/${2}//"`
+  fi
+}
+# removes regexp $2 from string $1
+mpi_remove () {
+  retval=`echo ${1} | sed -e "s/${2}//"`
+}
+
+msg_checking() {
+  if test $verbose -gt 0; then
+    echo -n "checking $@..."
+  fi
+}
+
+msg_result() {
+  if test $verbose -gt 0; then
+    echo " $@"
+  fi
+}
+
+msg_error() {
+  echo Error: $@
+  exit 1
+}
+
+test_lam () {
+  msg_checking for lam
+  cat >conftest.c <<_EOF
+#include <mpi.h>
+#include <stdio.h>
+#include <lam_config.h>
+
+int main() {
+  printf ("%i%i\n", LAM_MAJOR_VERSION, LAM_MINOR_VERSION);
+  return 0;
+ }
+_EOF
+
+  if mpi_trybuild "-c conftest.c"; then
+    # try new -showme:xxx function
+    mpi_getflags "-showme:compile"
+    if test x"$retval" != x ; then
+      # seems like LAM >= 7.1 which supports extraction of parameters without
+      # dummy files
+      MPI_VERSION="LAM >= 7.1"
+      MPI_CPPFLAGS="$retval"
+      mpi_getflags "-showme:link"
+      MPI_LDFLAGS="$retval"
+    else
+      MPI_VERSION="LAM < 7.1"
+      # use -showme and dummy parameters to extract flags        
+      mpi_getflags "-showme" "-c $MPISOURCE"
+      MPI_CPPFLAGS="$retval"
+      mpi_getflags "-showme" "dummy.o -o dummy"
+      MPI_LDFLAGS="$retval"
+    fi
+    # hack in option to disable LAM-C++-bindings...
+    # we fake to have mpicxx.h read already
+    MPI_NOCXXFLAGS="-DMPIPP_H"
+    msg_result yes
+    rm -f conftest*
+    return 0    
+  fi
+
+  rm -f conftest*
+  msg_result no
+  return 1
+}
+
+test_mpich () {
+  msg_checking for mpich
+  cat >conftest.c <<_EOF
+#include <mpi.h>
+
+int main() { return 0; }
+_EOF
+
+  if (mpi_preprocess conftest.c \
+      | grep -q MPICHX_PARALLELSOCKETS_PARAMETERS); then
+    MPI_VERSION="MPICH"
+    # use special commands to extract options      
+    mpi_getflags "-compile_info"
+    MPI_CPPFLAGS="$retval"
+    # remove implicitly set -c
+    mpi_remove "$MPI_CPPFLAGS" '-c'
+    MPI_CPPFLAGS="$retval"
+    mpi_getflags "-link_info"
+    MPI_LDFLAGS="$retval"
+    # hack in option to disable MPICH-C++-bindings...
+    MPI_NOCXXFLAGS="-DMPICH_SKIP_MPICXX"
+
+    msg_result yes
+    rm -f conftest*
+    return 0    
+  fi
+
+  rm -f conftest*
+  msg_result no
+  return 1
+}
+
+test_openmpi () {
+  msg_checking for OpenMPI
+  cat >conftest.c <<_EOF
+#include <mpi.h>
+
+int main() { return 0; }
+_EOF
+
+  if (mpi_preprocess conftest.c | grep -q ompi_communicator_t); then
+    MPI_VERSION="OpenMPI"
+    MPI_NOCXXFLAGS="-DMPIPP_H"
+
+    msg_result yes
+    rm -f conftest*
+    return 0    
+  fi
+
+  rm -f conftest*
+  msg_result no
+  return 1
+}
+
+test_ibmmpi() {
+  msg_checking for IBM MPI
+  if $MPICC -v -c conftest.c > /dev/null 2>&1; then
+    mpi_getflags "-v" "-c dummy.c"
+    if (echo $retval | grep '^xl[cC]'); then
+      MPI_VERSION="IBM MPI"
+
+      # mpCC passes on it's own parameter...
+      retval=`echo $retval | sed -e "s/-v//"`
+      # remove compiler name
+      retval=`echo $retval | sed -e 's/^xl[cC] //'`
+      # remove stuff we passed
+      retval=`echo $retval | sed -e "s/-c dummy.c//"`
+  
+      # get compilation script
+#      AC_LANG_CASE([C],[
+#        MPICOMP="$MPICC"
+#        dune_mpi_isgnu="$GCC"
+#      ],
+#      [C++],[
+#        MPICOMP="$MPICXX"
+#        dune_mpi_isgnu="$GXX"
+#      ])
+      # mpCC assumes xlc is used...
+#      if test x$dune_mpi_isgnu = xyes ; then
+#        # change commandline if GNU compiler is used
+#        retval=`echo $retval | sed -e 's/\(-b[[^ ]]*\)/-Xlinker \1/g'`
+#      fi
+      MPI_CPPFLAGS="$retval"
+  
+      mpi_getflags "-v" "dummy.o -o dummy"
+      # mpCC passes on it's own parameter...
+      retval=`echo $retval | sed -e "s/-v//"`
+      # remove compiler name
+      retval=`echo $retval | sed -e 's/^xl[cC] //'`
+      # remove stuff we passed
+      retval=`echo $retval | sed -e "s/dummy.o -o dummy//"`
+
+#      if test x$dune_mpi_isgnu = xyes ; then
+#        # change commandline if GNU compiler is used
+#        retval=`echo $retval | sed -e 's/\(-b[[^ ]]*\)/-Xlinker \1/g'`
+#      fi
+
+      MPI_LDFLAGS="$retval"
+
+      msg_result yes
+      rm -f conftest*
+      return 0    
+    fi
+  fi
+}
+
+get_mpiparameters() {
+  if test x"$MPI_VERSION" != x; then
+    return
+  fi 
+
+  test_lam && return
+  test_mpich && return
+  test_openmpi && return
+  test_ibmmpi && return
+   
+  MPI_VERSION="unknown"
+  msg_error "Could not identify MPI-package! Please send a bugreport and tell us what MPI-package you're using."
+}
+
+print_mpiversion() {
+  get_mpiparameters
+  echo $MPI_VERSION
+}
+
+print_cflags() {
+  get_mpiparameters
+  local CFLAGS="$MPI_CPPFLAGS"
+  if test x$disablecxx == xyes; then
+    CFLAGS="$MPI_CPPFLAGS $MPI_NOCXXFLAGS"
+  fi
+  echo $CFLAGS
+}
+
+print_libs() {
+  get_mpiparameters
+  echo $MPI_LDFLAGS
+}
+
+for task in $tasks; do
+  eval $task
+done