我在学习使用Nios II时，遇到这样的问题，在hello_led_0上又键单击，点build project。在cosole 中出现如下代码： **** Build of configuration Debug for project hello_led_0 **** make -s all includes make: *** No rule to make target `F:/JiangRui/Nios', needed by `/cygdrive/f/JiangRui/Nios/Debug/system_description/../obj/generated_app.mk-t'. Stop. Build completed in 3.204 seconds 哪位高手为小弟指点一下，看看这问题如何解决？
