ready for ics2020

Makefile

@@ -2,15 +2,15 @@ include nemu/Makefile.git
 
 default:
 	@echo "Please run 'make' under any subprojects to compile."
- 
+
 clean:
-	-$(MAKE) -C nemu clean
-	-$(MAKE) -C nexus-am clean
-	-$(MAKE) -C nanos-lite clean
-	-$(MAKE) -C navy-apps clean
+	-$(MAKE) -s -C nemu clean
+	-$(MAKE) -s -C abstract-machine clean-all
+	-$(MAKE) -s -C nanos-lite clean
+	-$(MAKE) -s -C navy-apps clean
 
 submit: clean
 	git gc
-	STUID=$(STUID) STUNAME=$(STUNAME) bash -c "$$(curl -s http://ics.nju.edu.cn/people/yanyanjiang/teach/submit.sh)"
+	STUID=$(STUID) STUNAME=$(STUNAME) bash -c "$$(curl -s http://jyywiki.cn/static/submit.sh)"
 
 .PHONY: default clean submit