#!/bin/sh

# Remove extranaeous libs from the linking command.  Reduces shared-library
# overhead at exec time.

BIN=perperl
TMP1=/tmp/remove_libs$$
TMP2="${TMP1}2"

it_worked() {
    test $? -eq 0 && ./$BIN -- -v 2>&1 | grep version >/dev/null
}

it_failed() {
    if it_worked; then
	return 1
    else
	return 0
    fi
}

# Try command without alteration.  Exit if it fails.
"$@" >$TMP1 2>$TMP2
status=$?
test $status -eq 0
if it_failed; then
    cat $TMP1
    cat 1>&2 $TMP2
    rm -f $TMP1 $TMP2
    exit $status
fi
rm -f $TMP1 $TMP2
mv -f ${BIN} ${BIN}.tmp$$

echo Attempting to remove extraneous libraries from the ${BIN} binary...

while :; do
    orig_count=$#
    cmd=$1; shift
    while test $# -gt 0; do
	next=$1; shift;
	case $next in
	-l*|*.a)
	    # Try to remove it
	    $cmd "$@" >/dev/null 2>&1
	    if it_worked; then
		echo "removed $next"
		continue;
	    fi
	    ;;
	esac
	cmd="$cmd $next"
    done
    set - $cmd
    if test $# -eq 0 -o $orig_count -eq $#; then
	break
    fi
done

echo Final command is $cmd
$cmd
if it_worked; then
    rm -f ${BIN}.tmp$$
else
    mv -f ${BIN}.tmp$$ ${BIN}
fi
exit 0
