老手看一下我的winavr怎么一编译就是这个？
"make.exe" all-------- begin --------
avr-gcc (GCC) 3.4.6
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
make.exe: *** No rule to make target `obj/main.o', needed by `testpp.elf'. Stop.
> Process Exit Code: 2
> Time Taken: 00:01这是什么意思，怎么改正？小弟先谢谢了。
