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3 Writing Makefiles
*******************
The information that tells `make' how to recompile a system comes from
reading a data base called the "makefile".
3.1 What Makefiles Contain
==========================
Makefiles contain five kinds of things: "explicit rules", "implicit
rules", "variable definitions", "directives", and "comments". Rules,variables, and directives are described at length in later chapters.
* 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.
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3 制作 makefile
告诉make 如何重新编译一个系统的数据信息被称为 makefile。
3.1 makefile 包含什么
makefile包含五种东西：显式规则，隐式规则，变量定义，指令，注释。
规则，变量和指令将在后面的章节中展开详细论述。
*Note Writing Rules: 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/2012/09/14/2684272.html，如需转载请自行联系原作者
