Index: common.mak
===================================================================
--- common.mak	(revision 19501)
+++ common.mak	(working copy)
@@ -38,6 +38,12 @@
 %.d: %.cpp
 	$(DEPEND_CMD)
 
+x86/%.o: x86/%.asm
+	$(YASM) $(YASMFLAGS) -I $(<D)/ -o $@ $<
+
+x86/%.d: x86/%.asm
+	$(YASM) $(YASMFLAGS) -I $(<D)/ -M -o $(@:%.d=%.o) $< > $@
+
 %.o: %.d
 
 %$(EXESUF): %.c