#!/bin/sh

# $Id$
# Author: Aaron Ucko, NCBI

linker=$1
os=`uname`
case "$os:`basename $1`" in
    SunOS:CC ) style=WorkShop; dryrun="-dryrun" ;;
    SunOS:cc ) style=WorkShop; dryrun="-###"    ;;
    SunOS:[gc]* | Linux:[gc]* ) style=GCC ;;
    *)
        echo "$0: warning: unrecognized platform; not interfering"
        exec "$@"
        ;;
esac

case "$os" in
    SunOS ) AWK=nawk ;;
    * )     AWK=awk  ;;
esac


FindLib() {
    found_static=false
    found_dynamic=false
    lib=`echo x$1 | sed -e 's/^x-l/lib/'`
    oldIFS="${IFS-
	 }"
    IFS="$oldIFS:"
    for dir in $2; do
        [ -f "$dir/$lib.so" ] && found_dynamic=true
        [ -f "$dir/$lib.a"  ] && found_static=true && break
    done
    IFS=$oldIFS
    case $found_dynamic:$found_static in
        true:true)   echo both    ;;
        true:false)  echo dynamic ;;
        false:true)  echo static  ;;
        false:false) echo none    ;; # warn on stderr?
    esac
}


new_cmd=
user=
mode=dynamic
extra_libs=

case $style in
    WorkShop )
        eval set `"$@" $dryrun 2>&1 | $AWK '$1 ~ /\/ld$/ { sub(">&[^ ]*", ""); print }'`
        sys0=$LD_LIBRARY_PATH
        sys=/usr/lib
        flag=-B
        ;;
    GCC )
        gcc_ver=`$1 -dumpversion`
        case "$gcc_ver" in
            3.[1-9]* )
                shift
                set "$linker" -static "$@"
                eval set `"$@" '-###' 2>&1 | $AWK '/\/ld"/ || /\/collect/'`
                sys=/usr/lib
                flag=-B
                ;;
            *)
                # No dry-run option, but --print-search-dirs helps.
                sys=`$1 --print-search-dirs | $AWK '/^libraries: / { print $2 }'`
                flag="-Wl,-B"
                extra_libs="-lc -lgcc"
                ;;
        esac
        case "$gcc_ver" in
            3.0* ) set "$@" -static-libgcc ;;
        esac
        ;;
esac

    
while [ $# -gt 0 ]; do
    mode2=$mode
    case "$1" in
        -l* )
            case `FindLib $1 $user:$sys0:$sys` in
                both)    mode2=static  ;;
                dynamic) mode2=dynamic ;;
            esac
            ;;
        -L* ) user="$user:`echo x$1 | sed -e 's/^x-L//'`" ;;
        -Y  ) case "$2" in P,*) sys=`echo $2 | sed -e 's/^P,//'` ;; esac ;;
    esac
    [ $mode2 = $mode ] || new_cmd="$new_cmd $flag$mode2"
    mode=$mode2
    new_cmd="$new_cmd $1"
    shift
done


if test -n "$extra_libs"; then
    need_dynamic=false
    want_static=false
    for x in $extra_libs; do
        case `FindLib $x $user:$sys` in
            both)    want_static=true  ;;
            dynamic) need_dynamic=true ;;
        esac
    done
    if [ $need_dynamic = true -a $mode = static ]; then
        new_cmd="$new_cmd ${flag}dynamic"
    elif [ $want_static = true -a $mode = dynamic ]; then
        new_cmd="$new_cmd ${flag}static"
    fi
fi


echo "$new_cmd" >&2
case "$linker" in
    */CC) $new_cmd 2>&1 | `dirname $linker`/c++filt -stderr ;;
    CC)   $new_cmd 2>&1 | c++filt -stderr ;;
    *)    exec $new_cmd ;;
esac