GNU make manual 翻译(十四)

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   A recipe may follow each line that contains a target and    
prerequisites.  These recipes say how to update the target file.  A tab    
character (or whatever character is specified by the `.RECIPEPREFIX'    
variable; *note Special Variables::) must come at the beginning of    
every line in the recipe to distinguish recipes from other lines in the    
makefile.  (Bear in mind that `make' does not know anything about how    
the recipes work.  It is up to you to supply recipes that will update    
the target file properly.  All `make' does is execute the recipe you    
have specified when the target file needs to be updated.)      

一个片段可以跟在一个目标和前提条件 系列之后

这些歌片段指出 如何改变目标 的文件。

一个 tab 符（或者如果.RECIPEPREFIX变量指定的其他符号）必须出现在片段所在行的起始处，

以区分片段行和其他的行。

必须意识到，make 本身并不清楚片段如何工作。这是由你来决定，使得片段可以正确地生成目的文件。

make 所作的所有的事情，就是 当目的文件需要被改变时，执行你所指定的片段。

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