继续翻译
2.1 What a Rule Looks Like ========================== A simple makefile consists of "rules" with the following shape: TARGET ... : PREREQUISITES ... RECIPE ... ... A "target" is usually the name of a file that is generated by a program; examples of targets are executable or object files. A target can also be the name of an action to carry out, such as `clean' (*note Phony Targets::). A "prerequisite" is a file that is used as input to create the target. A target often depends on several files.
2.1 规则长什么样
一个简单的makefile 由如下的规则组成：
目的... : 前提条件 ...
片段
...
...
一个目的是一个 文件的名字，此文件由某个程序生成。
目的的例子如 可执行文件 或者 目标文件。
目的也可以是 动作的名称 ，比如 clean (*note Phony Targets (伪目标))
一个前提条件是 一个文件名字，此文件被用作输入以产生目的。目的常常依赖于几种文件。
后文待续