dlerror以字符串的形式返回任何错误，这些错误信息字符串描述dl函数碰到的最后一个错误。
Any errors are returned in strings, by dlerror, which describe the last error encountered by a dl function.
描述如何能够关闭警告或将警告视为错误信息。
Describes how you can turn warnings off or have warnings treated as error messages.
这个系统调用允许你的程序从一个或多个文件描述符获取输入输出或者错误信息。
This system call allows your program to check for input, output, or error conditions on one or more file descriptors.
这个系统调用允许你的程序从一个或多个文件描述符获取输入输出或者错误信息。
This system call allows your program to check for input, output, or error conditions on one or more file descriptors.
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