在这种情况下不需要输出错误消息，因为文件描述符0到2只是在攻击者试图去搅乱您的程序的时候才会被关闭。
There's no need to print error messages for this case since file descriptors 0 through 2 are only closed if an attacker is trying to subvert your program.
如果没有错误发生，文件也会被关闭。
使用指令可以有条件地处理生成文件，显示错误消息，包括其他生成文件，取消定义宏以及打开或关闭某些选项。
Using directives, you can conditionally process your makefile, display error messages, include other makefiles, undefine a macro, and turn certain options on or off.
它不会正常工作，你的任何错误的文件将被关闭无效的，如果你在这里你会被告知要重新编译安装所有依赖关系和寻求帮助。
It won't work properly, any bugs you file will be closed as invalid, and if you ask for help here you'll be told to install all dependencies and recompile.
它不会正常工作，你的任何错误的文件将被关闭无效的，如果你在这里你会被告知要重新编译安装所有依赖关系和寻求帮助。
It won't work properly, any bugs you file will be closed as invalid, and if you ask for help here you'll be told to install all dependencies and recompile.
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