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* An "explicit rule" says when and how to remake one or more files,
called the rule's "targets". It lists the other files that the
targets depend on, called the "prerequisites" of the target, and
may also give a recipe to use to create or update the targets.
*Note Writing Rules: Rules.
* An "implicit rule" says when and how to remake a class of files
based on their names. It describes how a target may depend on a
file with a name similar to the target and gives a recipe to
create or update such a target. *Note Using Implicit Rules:
Implicit Rules.
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一个 "显式规则" 表明何时以及如何重新制作一个或多个文件(此规则的目的)。
它列举出目的所以来的其他文件(目的的前提条件)，并且也许会给出一个用来创建和修改目的的片段。
*Note Writing Rules: Rules
一个"隐式规则" 表明何时以及如何根据文件的名字重新制作此文件。它描述了一个目的如何依赖于
一个和目的文件相类似的文件名，并给出一个片段来创建或更改这个目的文件。
*Note Using Implicit Rules: Implicit Rules
后文待续
本文转自健哥的数据花园博客园博客，原文链接：http://www.cnblogs.com/gaojian/archive/2012/09/14/2684275.html，如需转载请自行联系原作者
