#! @BASH_SHELL@

# 

# (C) 2006 by Argonne National Laboratory.

#     See COPYRIGHT in top-level directory.

#

# mpicxx

# Simple script to compile and/or link MPI programs.

# This script knows the default flags and libraries, and can handle

# alternative C++ compilers and the associated flags and libraries.

# The important terms are:

#    includedir, libdir - Directories containing an *installed* mpich

#    prefix, execprefix - Often used to define includedir and libdir

#    CXX                - C compiler

#    WRAPPER_CXXFLAGS      - Any special flags needed to compile 

#    WRAPPER_LDFLAGS       - Any special flags needed to link

#    WRAPPER_LIBS          - Any special libraries needed in order to link

#    

# We assume that (a) the C++ compiler can both compile and link programs

#

# Handling of command-line options:

#   This is a little tricky because some options may contain blanks.

#

# Special issues with shared libraries - todo

#

# --------------------------------------------------------------------------

# Set the default values of all variables.

#

# Directory locations: Fixed for any MPI implementation

prefix=__PREFIX_TO_BE_FILLED_AT_INSTALL_TIME__

exec_prefix=__EXEC_PREFIX_TO_BE_FILLED_AT_INSTALL_TIME__

sysconfdir=__SYSCONFDIR_TO_BE_FILLED_AT_INSTALL_TIME__

includedir=__INCLUDEDIR_TO_BE_FILLED_AT_INSTALL_TIME__

libdir=__LIBDIR_TO_BE_FILLED_AT_INSTALL_TIME__

# Default settings for compiler, flags, and libraries

CXX="@CXX@"

MPICH_VERSION="@MPICH_VERSION@"

enable_wrapper_rpath="@enable_wrapper_rpath@"

@cxx_shlib_conf@

# Internal variables

# Show is set to echo to cause the compilation command to be echoed instead 

# of executed.

Show=

#

# End of initialization of variables

#---------------------------------------------------------------------

# Environment Variables.

# The environment variables MPICH_CXX may be used to override the 

# default choices.

# In addition, if there is a file $sysconfdir/mpicxx-$CXXname.conf, 

# where CXXname is the name of the compiler with all spaces replaced by hyphens

# (e.g., "CC -64" becomes "CC--64", that file is sources, allowing other

# changes to the compilation environment.  See the variables used by the 

# script (defined above)

# Added MPICH_CXX_OLD, MPICH_CXX can be used to prefix CXX

# with external utility, e.g. setenv MPICH_CXX 'eval linkcache $MPICH_CXX_OLD'

if [ -n "$MPICH_CXX" ] ; then

    MPICH_CXX_OLD="$CXX"

    CXX="$MPICH_CXX"

    CXXname=`echo $CXX | sed 's/ /-/g'`

    if [ -s $sysconfdir/mpicxx-$CXXname.conf ] ; then

        . $sysconfdir/mpicxx-$CXXname.conf

    fi

fi

# Allow a profiling option to be selected through an environment variable

if [ -n "$MPICXX_PROFILE" ] ; then

    profConf=$MPICXX_PROFILE

fi

#

# ------------------------------------------------------------------------

# Argument processing.

# This is somewhat awkward because of the handling of arguments within

# the shell.  We want to handle arguments that include spaces without 

# loosing the spacing (an alternative would be to use a more powerful

# scripting language that would allow us to retain the array of values, 

# which the basic (rather than enhanced) Bourne shell does not.  

#

# Look through the arguments for arguments that indicate compile only.

# If these are *not* found, add the library options

linking=yes

allargs=("$@")

argno=0

interlib_deps=yes

for arg in "$@" ; do

    # Set addarg to no if this arg should be ignored by the C compiler

    addarg=yes

    case "$arg" in 

 	# ----------------------------------------------------------------

	# Compiler options that affect whether we are linking or no

    -c|-S|-E|-M|-MM)

    # The compiler links by default

    linking=no

    ;;

	# ----------------------------------------------------------------

	# Options that control how we use mpicxx (e.g., -show, 

	# -cxx=* -config=*

    -static)

    interlib_deps=no

    ;;

    -echo)

    addarg=no

    set -x

    ;;

    -cxx=*)

    CXX=`echo A$arg | sed -e 's/A-cxx=//g'`

    addarg=no

    ;;

    # Backwards compatibility for MPICH1 - scripts

    -CC=*)

    CXX=`echo A$arg | sed -e 's/A-CC=//g'`

    addarg=no

    ;;

    -show)

    addarg=no

    Show=echo

    ;;

    -config=*)

    addarg=no

    CXXname=`echo A$arg | sed -e 's/A-config=//g'`

    if [ -s "$sysconfdir/mpicxx-$CXXname.conf" ] ; then

        . "$sysconfdir/mpicxx-$CXXname.conf"

    else

	echo "Configuration file mpicxx-$CXXname.conf not found"

    fi

    ;;

    -compile-info|-compile_info)

    # -compile_info included for backward compatibility

    Show=echo

    addarg=no

    ;;

    -link-info|-link_info)

    # -link_info included for backward compatibility

    Show=echo

    addarg=no

    ;;

    -v)

    # Pass this argument to the compiler as well.

    echo "mpicxx for MPICH version $MPICH_VERSION"

    # if there is only 1 argument, it must be -v.

    if [ "$#" -eq "1" ] ; then

        linking=no

    fi

    ;;

    -profile=*)

    # Pass the name of a profiling configuration.  As

    # a special case, lib<name>.so or lib<name>.la may be used

    # if the library is in $libdir

    profConf=`echo A$arg | sed -e 's/A-profile=//g'`

    addarg=no

    # Loading the profConf file is handled below

    ;;

    -nativelinking)

    # Internal option to use native compiler for linking without MPI libraries

    nativelinking=yes

    addarg=no

    ;;

    -help)

    NC=`echo "$CXX" | sed 's%\/% %g' | awk '{print $NF}' -`

    if [ -f "$sysconfdir/mpixxx_opts.conf" ] ; then

        . $sysconfdir/mpixxx_opts.conf

        echo "    -cxx=xxx      - Reset the native compiler to xxx."

    else

        if [ -f "./mpixxx_opts.conf" ] ; then

            . ./mpixxx_opts.conf

            echo "    -cxx=xxx      - Reset the native compiler to xxx."

        fi

    fi

    exit 0

    ;;

    *)

    ;;

    esac

    if [ $addarg = no ] ; then

	unset allargs[$argno]

    fi

    # Some versions of bash do not accept ((argno++))

    argno=`expr $argno + 1`

done

if [ $# -eq 0 ] ; then

    echo "Error: Command line argument is needed!"

    "$0" -help

    exit 1

fi

# -----------------------------------------------------------------------

# Derived variables.  These are assembled from variables set from the

# default, environment, configuration file (if any) and command-line

# options (if any)

cxxlibs=

if [ "@MPICXXLIBNAME@" != "@MPILIBNAME@" ] ; then

    cxxlibs="-l@MPICXXLIBNAME@"

fi

PROFILE_FOO=

# Handle the case of a profile switch

if [ -n "$profConf" ] ; then

    profConffile=

    if [ -s "$libdir/lib$profConf.a" -o -s "$libdir/lib$profConf.so" ] ; then

	PROFILE_FOO="-l$profConf"

    elif [ -s "$sysconfdir/$profConf.conf" ] ; then

	profConffile="$sysconfdir/$profConf.conf"

    elif [ -s "$profConf.conf" ] ; then

        profConffile="$profConf.conf"

    else

        echo "Profiling configuration file $profConf.conf not found in $sysconfdir"

    fi

    if [ -n "$profConffile" -a -s "$profConffile" ] ; then

	. $profConffile

    fi

fi

final_cxxflags="@MPICH_MPICXX_CXXFLAGS@ @WRAPPER_CXXFLAGS@"

final_cppflags="@MPICH_MPICXX_CPPFLAGS@ @WRAPPER_CPPFLAGS@"

final_ldflags="@MPICH_MPICXX_LDFLAGS@ @WRAPPER_LDFLAGS@"

final_libs="@MPICH_MPICXX_LIBS@"

if test "@INTERLIB_DEPS@" = "no" -o "${interlib_deps}" = "no" ; then

    final_ldflags="${final_ldflags} @LDFLAGS@"

    final_libs="${final_libs} @LIBS@ @WRAPPER_LIBS@"

fi

# A temporary statement to invoke the compiler

# Place the -L before any args incase there are any mpi libraries in there.

# Eventually, we'll want to move this after any non-MPI implementation 

# libraries

if [ "$linking" = yes ] ; then

    # Attempt to encode rpath info into the executable if the user has not

    # disabled rpath usage and some flavor of rpath makes sense on this

    # platform.

    # TODO configure and config.rpath are computing more sophisticated rpath

    # schemes than this simple one.  Consider updating this logic accordingly.

    if test "X$enable_wrapper_rpath" = "Xyes" ; then

        eval rpath_flags=\"${hardcode_libdir_flag_spec}\"

    else

	rpath_flags=""

    fi

    if [ "$nativelinking" = yes ] ; then

        $Show $CXX ${final_cppflags} $PROFILE_INCPATHS ${final_cxxflags} ${final_ldflags} "${allargs[@]}" -I$includedir

        rc=$?

    else

        $Show $CXX ${final_cppflags} $PROFILE_INCPATHS ${final_cxxflags} ${final_ldflags} "${allargs[@]}" -I$includedir -L$libdir $cxxlibs $PROFILE_PRELIB $PROFILE_FOO $rpath_flags -l@MPILIBNAME@ @LPMPILIBNAME@ $PROFILE_POSTLIB ${final_libs}

        rc=$?

    fi

else

    $Show $CXX ${final_cppflags} $PROFILE_INCPATHS ${final_cxxflags} "${allargs[@]}" -I$includedir

    rc=$?

fi

exit $rc