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编译时出现这样的错误，建了好几个工程了都这样，程序没错，编译后就这样，请求专家指教！！！！
楼主，
这个是指_delay_syslen这个symbol没有定义，你可以看看你是不是写错了，还是说可以不用它，换另外的函数。
谢谢
