Smart entity rule

Makefile

@@ -11,8 +11,8 @@ all: $(PARTS)
 	$(CHDL) -r $(FLAGS) $@ --wave=$@.ghw --stop-time=$(STOP)
 
 clean:
-	rm *.o
-	rm *.cf
-	rm *.ghw
-
-.PHONY: all clean $(PARTS)
+	find . -name '*.o' -exec rm -r {} \;
+	find . -name '*.cf' -exec rm -r {} \;
+	find . -name '*.ghw' -exec rm -r {} \;
+	find . -name '*.entity' -exec rm -r {} \;
+	find . -name $(PARTS) -exec rm -r {} \;