configure

#!/bin/bash

LD_LIBRARY_PATH=$DYLD_LIBRARY_PATH:$LD_LIBRARY_PATH:/:/usr:/usr/local:/opt:/opt/local

set +e
set -u
set -f

find_exec() {
    RETURN_VALUE=0
    for i in ${PATH//:/ }; do
	if [ -e $i/$1 ]; then 
	    RETURN_VALUE=$i
	    break ;
	fi
    done
}

find_lib() {
    RETURN_VALUE=0
    for i in ${LD_LIBRARY_PATH//:/ }; do
	if [ -e $i/lib$1.a ]; then
	    RETURN_VALUE=$i
	    break;
	fi
	if [ -e $i/lib$1.so ]; then
	    RETURN_VALUE=$i
	    break ;
	fi
    done
}

OBJDIR=OBJ
ARCH=`uname -s`

PREFIX=/usr/local
LOCI_BASE=notset
PREFIX_SET=0
while [ $# -ne 0 ]; do 
    case "$1" in
	--prefix)
	    shift
	    PREFIX_SET=1
	    PREFIX=$1
	    ;;
	--prefix\=*)
	    tmp=$1
	    PREFIX_SET=1
	    PREFIX=${tmp#--prefix\=}
	    ;;
	--loci-dir)
	    shift
	    LOCI_BASE=$1
	    ;;
	--loci-dir\=*)
	    tmp=$1
	    LOCI_BASE=${tmp#--loci-dir\=}
	    ;;
	--obj-dir)
	    shift
	    OBJDIR=$1
	    ;;
	--obj-dir\=*)
	    tmp=$1
	    OBJDIR=${tmp#--obj-dir\=}
	    ;;
	 --help)
	    echo "configure usage:"
	    echo "./configure <options>"
	    echo "where <options> may include"
	    echo "  --prefix <install directory>    : tell configure where to install Loci."
	    echo "  --loci-dir <Loci install directory>      : tell configure where Loci is installed"
	    echo "  --obj-dir <OBJDIR name>         : tell configure where to put object files"
	    echo "  --help                          : output this help information"
	    exit -1
	    ;;
	    
	*)
	    echo configure option \'$1\' not understood!
	    echo use ./configure --help to see correct usage!
	    exit -1 
            break
            ;;
    esac
    shift
done



if [ $LOCI_BASE == "notset" ]; then
    find_exec lpp
    if [ $RETURN_VALUE != 0 ]; then
	LOCI_BASE=${RETURN_VALUE%/bin*}
    else
	echo "Unable to find Loci libraries needed to make CHEM!"
	echo "Use --loci-dir to set Loci directory, or add Loci to your"
	echo "PATH environment varaible before running configure"
	exit -1
    fi
fi

case "$ARCH" in
    Linux)
    USEMAKE=make
    ;;
    Darwin)
    USEMAKE=make
    ;;
    CYGWIN*)
    USEMAKE=make
    ;;
    *)
    USEMAKE=gmake
    ;;
esac    

echo "LOCI_BASE = " ${LOCI_BASE} > flowpsi.conf
echo "FLOWPSI_INSTALL_PATH = " ${PREFIX} >> flowpsi.conf

if [ $PREFIX_SET -eq 0 ]; then
    echo "*******************************************************************************"
    echo "** NOTICE!!!!"
    echo "** Usually the option --prefix will be used to specify an installation"
    echo "**  directory.  The default setting for the prefix is \"${PREFIX}\".  If you"
    echo "** want to install into a different directory, use the --prefix option of "
    echo "** configure.  Execute \"./configure --help\" to see more configure options."
    echo "** NOTICE!!!!"
    echo "*******************************************************************************"
fi

echo 
echo
echo "To compile FlowPsi, enter:"
echo "  make"
echo "To install FlowPsi in the directory $PREFIX, enter:"
echo "  make install"