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`vpath PATTERN'
Clear out the search path associated with PATTERN.
`vpath'
Clear all search paths previously specified with `vpath'
directives.
A `vpath' pattern is a string containing a `%' character. The string must match the file name of a prerequisite that is being searched for, the `%' character matching any sequence of zero or more characters (as in pattern rules; *note Defining and Redefining Pattern Rules:Pattern Rules.). For example, `%.h' matches files that end in `.h'.(If there is no `%', the pattern must match the prerequisite exactly,
which is not useful very often.)
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vpath PATTERN
清除和PATTERN 关联的搜索路径
vpath
清除所有之前用 vpath 设定的搜索路径
一个 vpath 模式是一个字符串，其中包含% 字符。这个字符串必须匹配要搜索的前提条件的文件名字，%字符匹配灵鸽或者多个字符(作为模式的规则 *note Defining and Redefining Pattern Rules:Pattern Rules.)。例如，%.h 匹配以.h结尾的文件。(如果没有%,那么模式必须完全符合前提条件名字，这个没有多大用处)
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/2012/09/19/2693835.html，如需转载请自行联系原作者
