Then, it stores a reference to the unit's file in the PDOM, along with references to the included directives and macro definitions.
然后，它存储一个对PDOM中的单元文件的引用以及对所包含的指令和宏定义的其他引用。
In the process, all preprocessor directives are carried out, macro expansions are performed, and comments are removed.
在此过程中，执行所有的预处理器指令，执行宏展开，并移除注释。
Using directives, you can conditionally process your makefile, display error messages, include other makefiles, undefine a macro, and turn certain options on or off.
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.
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。
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