mpi-config

#!/bin/bash

set -e

canonicalname(){
  if test $# -ne 1; then
     echo Usage: canonicalname path >&2
     return 1
  fi
  name="$1"
  while test -L "$name"; do
    if ! test -e "$name"; then
      echo $name: file not found >&2
      return 1
    fi
    if newname="`readlink $name`"; then
      name="$newname"
    else
      echo "$(dirname $name)/$(basename $name)"
    fi
  done
  echo $name
}

canonicalpath(){
  if test $# -ne 1; then
     echo Usage: canonicalpath path >&2
     return 1
  fi
  (cd $(dirname $(canonicalname $1)) && pwd)
}

findm4dir() {
  BINDIR="$(canonicalpath $0)"
  # source-build
  M4DIR="$BINDIR/../m4"
  if test -f "$M4DIR/mpi-config.m4"; then
    echo "$M4DIR"
    return
  fi
  # installed
  M4DIR="$BINDIR/../share/dune/aclocal"
  if test -f "$M4DIR/mpi-config.m4"; then
    echo "$M4DIR"
    return
  fi
  # downloaded
  M4DIR="$BINDIR"
  if test -f "$M4DIR/mpi-config.m4"; then
    echo "$M4DIR"
    return
  fi
  echo "ERROR: could not find mpi-config.m4! Incomplete installation?" >&2
  exit 1
}

version=0.1
verbose=0

usage()
{
  cat <<EOF
mpi-config is a tool to help you determine the compiler and linker flags that
you need in order to build your code with MPI.  It is very similar to pkg-config,
but doesn't rely on help from your MPI installation.  If/when MPI implementations
start supporting pkg-config then mpi-config will become obsolete.
  
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="$tasks print_cflags"
    ;;
  --ldflags)
    tasks="$tasks print_ldflags"
    ;;
  --libs)
    tasks="$tasks print_libs"
    ;;
  *)
    usage 1 1>&2
    ;;
  esac
  shift
done

if test x$MPICC = x ; then
  MPICC=mpicc
fi

#
# LIB
#
# load mpi-config.m4
#

# find m4 file
M4DIR=`findm4dir`

eval "$(
m4 -I$M4DIR <<EOF
changequote([, ])
define([AC_DEFUN],[define([\$1],[\$2])])
define([AC_MSG_CHECKING],[
  if test $verbose -gt 0; then
    echo -n "checking \$@..."
  fi
])
define([AC_MSG_RESULT],[
  if test $verbose -gt 0; then
    echo " \$@"
  fi
])
define([AC_MSG_NOTICE],[
  if test $verbose -gt 0; then
    echo "\$@"
  fi
])
define([AC_MSG_ERROR],[
  if test $verbose -gt 0; then
    echo "Error: \$@"
    exit 1
  fi
])
include([mpi-config.m4])
MPI_CONFIG_HELPER
EOF
)"

#
# output methods
#

print_mpiversion() {
  get_mpiparameters
  echo $MPI_VERSION
}

print_cflags() {
  get_mpiparameters
  if test x$disablecxx = xyes; then
    DUNEMPICPPFLAGS="$DUNEMPICPPFLAGS $MPI_NOCXXFLAGS"
  fi
  echo $DUNEMPICPPFLAGS
}

print_ldflags() {
  get_mpiparameters
  echo $DUNEMPILDFLAGS
}

print_libs() {
  get_mpiparameters
  echo $DUNEMPILIBS
}

for task in $tasks; do
  eval $task
done