In function `_start':(.text+0x18): undefined reference to `main'

http://topic.csdn.net/u/20070706/13/ff451696-6e9a-4970-811b-f534820035ca.html

http://blog.csdn.net/jjzhoujun2010/article/details/6525170

http://topic.csdn.net/u/20100320/16/b85540b6-957f-4d7d-af66-4d38f1a53953.html

PANIC: early exception 0d