New $(ocmp) like $o but compares to avoid too much remaking

diff --git a/common.make b/common.make
index a15cbedda35d7f5f1eef29a3f33f343b248e9fc1..8a9c398a384a5d8a483f9098b5a78c1b65204d8b 100644 (file)
--- a/common.make
+++ b/common.make
@@ -1 +1,2 @@
 o=>$@.new && mv -f $@.new $@
+ocmp=>$@.new && (cmp $@ $@.new || mv -f $@.new $@)