#! /bin/sh
#
# Script to compile and link MPI programs
# We'd like to just add a few libraries to the link line and an include
# directory to the compile line, but some systems that MPICH supports make
# that difficult because the compiler and the linker are different programs.
# Thus, this code tries to figure out which options go where, at least for
# things that are different between compile and link steps.
#
DoLink=1
DoCompile=0
show_compile=0
show_link=0
MPILOG=
Show=eval
allargs=
compileargs=
linkargs=
linkobjs=
gettinglinkarg=0
HasDashC=0
UsesPmpi=0
verbose=0
proflib=-lpmpich
proflibfullname=/usr/rels/mpich-1.2..4pre2/lib/libpmpich.a
CCBASE="cc"
CC="${MPICH_CC-$CCBASE}"
CLINKERBASE="cc"
CLINKER="${MPICH_CLINKER-$CLINKERBASE}"
UseSharedLib=${MPICH_USE_SHLIB-no}
for arg in "$@" ; do
#    echo procssing arg $arg
    # Special processing for -o name
    if [ $gettinglinkarg = 1 ] ; then
	linkargs="$linkargs $arg"
	outputfilename="$arg"
	gettinglinkarg=0
	continue
    fi
    case "$arg" in 
	-c)
	# If -c is NOT specified, then we need to perform a link step.
	allargs="$allargs $arg"
	compileargs="$compileargs $arg"
        # If -o was set, then we need to move the output file option
        # to the compile line (note that this is non-standard, and should
        # not be used in portable codes)
        if [ $DoLink = 1 -a -n "$outputfilename" ] ; then
	    compileargs="$compileargs -o $outputfilename"
        fi
	DoLink=0
	HasDashC=1
	;;
        -o)
	# Need to link
	allargs="$allargs $arg"
        if [ $HasDashC = 1 ] ; then
            # Some BUT NOT ALL compilers support -o with -c.  Allow
            # the user to make use of the feature, IF IT EXISTS.
            compileargs="$compileargs $arg"	
        else
	    linkargs="$linkargs $arg"
	    # Still need to add the target of the -o
	    gettinglinkarg=1
	    DoLink=1
        fi
	;;
	-E|-M)
	# For compilers that support -E as a way to get at the C preprocessor
	# Also, for compilers that support -M for creating dependencies
	allargs="$allargs $arg"
	compileargs="$compileargs $arg"
	DoLink=0
	;;

	-mpilog)
	if [ $UsesPmpi = 1 ] ; then
	    echo "Only one of -mpilog, -mpitrace, or -mpianim may be used."
	    exit 1
	else
	    UsesPmpi=1
        fi
	if [ 0 = 0 ] ; then
		MPILOG="-llmpi -lmpe"
	else
	    echo "-mpilog requires the MPE libraries"
	fi
	;;
	-mpitrace)
	if [ $UsesPmpi = 1 ] ; then
	    echo "Only one of -mpilog, -mpitrace, or -mpianim may be used."
	    exit 1
	else
	    UsesPmpi=1
        fi
	if [ 0 = 0 ] ; then
   	    MPILOG=-ltmpi
	else
	    echo "-mpitrace requires the MPE libraries"
	fi
	;;
	-mpianim)
	if [ $UsesPmpi = 1 ] ; then
	    echo "Only one of -mpilog, -mpitrace, or -mpianim may be used."
	    exit 1
	else
	    UsesPmpi=1
        fi
	if [ 0 = 0 ] ; then
	    MPILOG="-lampi -lmpe"
	else
	    echo "-mpianim requires the MPE libraries"
	fi
	;;
	-echo)
	set -x
	;;
	-show)
	Show=echo
	;;
	-cc=*)
	CC=`echo A$arg | sed -e 's/A-cc=//g'`
	CLINKER="$CC"
	;;
	-compile_info)
	show_compile=1
	DoLink=0
	Show=echo
	;;
	-link_info)
	show_link=1
	Show=echo
	;;
	-shlib)
        UseSharedLib=yes
	;;
	-noshlib)
        UseSharedLib=no
	;;
	-v)
	verbose=1
	compileargs="$compileargs -v"
	linkargs="$linkargs -v"
	;;
	-l*)
	# This SHOULD be the -l<lib> argument.  Only for the linker
	linkargs="$linkargs $arg"
	allargs="$allargs $arg"
	;;
	-help)
	echo "This is a program to compile or link MPI programs"
	echo "In addition, the following special options are supported"
	echo "    -mpilog    - Build version that generate MPE log files"
	echo "    -mpitrace  - Build version that generates traces"
	echo "    -mpianim   - Build version that generates real-time"
	echo "                 animation"
	echo "    -cc=pgm    - Change the program to use to compile and link"
        echo "                 MPI programs.  WARNING! The program that you"
        echo "                 choose MUST be compatible with the MPICH "
        echo "                 libraries.  If you have trouble, you should"
        echo "                 reconfigure and rebuild MPICH, selecting"
        echo "                 this compiler."
	echo "    -show      - Show the commands that would be used without"
	echo "                 runnning them"
	echo "    -compile_info - Show how to compile a program"
	echo "    -link_info - Show how to link a program"
	echo "    -help      - Give this help"
	echo "    -echo      - Show exactly what this program is doing."
	echo "                 This option should normally not be used."
	echo "This should be used just like the usual C compiler"
	echo "For example,"
	echo "   $0 -c foo.c "
	echo "and"
	echo "   $0 -o foo foo.o"
	echo "Combining compilation and linking in a single command"
	echo "   $0 -o foo foo.c"
	echo "may not work on some systems, and is not recommended."
	exit 1
	;;
	
	# Unrecognized args.  Because we do an eval, we need to
	# carefully quote any args that contain quotes.
        *\"*) 
	qarg="'"$arg"'"
	allargs="$allargs $qarg"
	compileargs="$compileargs $qarg"
	linkargs="$linkargs $qarg"
	;;
        *\'*) 
	qarg='\"'"$arg"'\"'
	allargs="$allargs $qarg"
	compileargs="$compileargs $qarg"
	linkargs="$linkargs $qarg"
	;;
        *) allargs="$allargs $arg"
	if [ -s "$arg" ] ; then
	    ext=`expr "$arg" : '.*\(\..*\)'`
	    if [ "$ext" = ".c" ] ; then
	        DoCompile=1
	        compileargs="$compileargs $arg"
	        fname=`basename $arg .c`
	        linkobjs="$linkobjs $fname.o"
	    elif [ "$ext" = ".o" ] ; then
		if [ $HasDashC = 1 ] ; then
	            compileargs="$compileargs $arg"
                else
	            DoLink=1
	            linkobjs="$linkobjs $arg"
                fi
	    else
	        compileargs="$compileargs $arg"
	        linkargs="$linkargs $arg"
	    fi
	else
            compileargs="$compileargs $arg"
	    linkargs="$linkargs $arg"
	fi
	;;
    esac
done
#
status=0
if [ $DoCompile = 1 -o $show_compile = 1 ] ; then 
    if [ $HasDashC != 1 ] ; then
        compileargs="-c $compileargs"
    fi
    $Show $CC -I/GM/binary/include -I/GM/include -DUSE_STDARG  -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_UNISTD_H=1 -DHAVE_STDARG_H=1 -DUSE_STDARG=1 -DMALLOC_RET_VOID=1  -I/usr/rels/mpich-1.2..4pre2/include $compileargs
    status=$?
    if [ $status != 0 ] ; then 
	exit $status
    fi
fi
#
# Here's a tricky issue:  If there is no mpi library yet, we can't link,
# but if we are building other tools that need mpicc, they may need to 
# build and run non-mpi programs.  This is currently handled in the configure
# by making a dummy library.
# 
if [ $DoLink = 1 -o $show_link = 1 ] ; then
    # If the profiling library doesn't exist, or MPICH_NO_PROF environment
    # variable is set, skip the profiling library.
    if [ -n "$MPICH_NO_PROF" -o ! -s "$proflibfullname" ] ; then
        proflib=""
    fi
    # IRIX complains if we include a library twice.  In the case of a
    # library using weak symbols, we don't need the proflib.  Just
    # in case we do, there is an enviroment variable that
    # can be used to override this test.
    if [ "1" = "1" -a "$MPICH_INCLUDE_PROFLIB" != yes ] ; then
        proflib=""
    fi
    # Only use the shared libraries if explicitly requested.  This is
    # necessary because some (all?) systems are quite happy to link with
    # a shared library *and then forget where it is*!  You often need to
    # set an environment variable like LD_LIBRARY_PATH to include the
    # path where the shared libraries are (is this broken or what?).
    # Since that enviroment variable would then need to be set for all
    # hosts where the program might run (since rsh doesn't propagate 
    # the environment), we don't make this the default.
    if [ "ignore" != "ignore" -a $UseSharedLib = "yes" ] ; then
	clibpath="-L"
        if [ -n "" ] ; then
	    clibpath=" $clibpath"
  	    fi
	if [ -n "" ] ; then
	    clibpath="-L $clibpath"
 	    if [ -n "" ] ; then
	        clibpath=" $clibpath"
  	    fi
	fi
    fi
    if [ -n "$MPILOG" ] ; then
        $Show $CLINKER -I/GM/binary/include -I/GM/include -DUSE_STDARG  -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_UNISTD_H=1 -DHAVE_STDARG_H=1 -DUSE_STDARG=1 -DMALLOC_RET_VOID=1  $clibpath -L/usr/rels/mpich-1.2..4pre2/lib  $linkobjs $MPILOG $linkargs $proflib -lmpich $proflib  -L/GM/binary/lib/ -L/GM/lib/ -lgm
    else
	# linkargs needs to be after linkobjs for things like "-lm"
        $Show $CLINKER -I/GM/binary/include -I/GM/include -DUSE_STDARG  -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_UNISTD_H=1 -DHAVE_STDARG_H=1 -DUSE_STDARG=1 -DMALLOC_RET_VOID=1  $clibpath -L/usr/rels/mpich-1.2..4pre2/lib  $linkobjs $linkargs $proflib -lmpich $proflib  -L/GM/binary/lib/ -L/GM/lib/ -lgm
    fi
    status=$?
fi
exit $status
