继续翻译
3.3 Including Other Makefiles ============================= The `include' directive tells `make' to suspend reading the current makefile and read one or more other makefiles before continuing. The directive is a line in the makefile that looks like this: include FILENAMES... FILENAMES can contain shell file name patterns. If FILENAMES is empty, nothing is included and no error is printed.
3.3 包含其他 makefile
include 指令告诉 make 暂时停止阅读当前的 makefile，然后阅读一个或更多的其他的makefile。
指令如下面的样子：
include FILENAMES 。。。
FILENAMES 可以包含 shell 文件名称模式。如果FILENAMES 是空，那么将不会包含任何文件，也不会报错。
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