1 files changed, 15 insertions, 8 deletions
diff --git a/scripts/mkdiff_obj b/scripts/mkdiff_obj
index a6ec5e6..f783491 100755
--- a/scripts/mkdiff_obj
+++ b/scripts/mkdiff_obj
@@ -1,28 +1,35 @@
 #!/bin/sh
 
+usage() {
+	echo "Usage: ${0##*/} DIR1 DIR2"
+	echo
+	echo "Compares all object files recursivelty found in DIR1 and DIR2."
+	echo "Prints diff of their disassembly."
+	echo
+	exit $1
+}
+
 filter() {
 	# sed removes " address: " prefixes which mess up diff
 	sed $'s/^\\(\t*\\)[ ]*[0-9a-f][0-9a-f]*:[ \t]*/\\1/' \
 	| sed 's/__GI_//g'
 }
 
-test -d "$1" || exit 1
-test -d "$2" || exit 1
+test -d "$1" || usage 1
+test -d "$2" || usage 1
 
 {
 	(
 		cd "$1" || exit 1
-		find -name '*.o' -o -name '*.os' # -o -name '*.so'
+		find -name '*.o' # -o -name '*.os' # -o -name '*.so'
 	)
 	(
 		cd "$2" || exit 1
-		find -name '*.o' -o -name '*.os' # -o -name '*.so'
+		find -name '*.o' # -o -name '*.os' # -o -name '*.so'
 	)
 } | sed 's:^\./::' | sort | uniq | \
-tee LST | \
 (
-IFS=''
-while read -r oname; do
+while IFS='' read -r oname; do
 	if ! test -f "$1/$oname"; then
 		echo "Only $2/$oname"
 		continue
@@ -34,6 +41,6 @@ while read -r oname; do
 	diff -q -- "$1/$oname" "$2/$oname" >/dev/null && continue
 	(cd "$1"; objdump -dr "$oname" | filter >"$oname.disasm")
 	(cd "$2"; objdump -dr "$oname" | filter >"$oname.disasm")
-	diff -u "$1/$oname.disasm" "$2/$oname.disasm"
+	diff -u -- "$1/$oname.disasm" "$2/$oname.disasm"
 done
 )