1 files changed, 15 insertions, 8 deletions

diff --git a/scripts/mkdiff_obj b/scripts/mkdiff_obj
index a6ec5e602..f783491af 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
 )