vpath中的V代表什么？

Question

makefile中的VPATH变量用于指示搜索路径。但是它中的“V”究竟代表什么呢？

  

make变量VPATH的值指定应搜索的目录列表。通常，目录应包含不在当前目录中的必备文件;但是，make使用VPATH作为规则的先决条件和目标的搜索列表。

Answer 1

VPATH似乎是：虚拟路径

我发现此链接有关：gcc_make

这样定义了VPATH：

>**Virtual Path - VPATH & vpath**

>You can use VPATH (uppercase) to specify the directory to search for dependencies and target files. For example,

># Search for dependencies and targets from "src" and "include" directories
># The directories are separated by space

VPATH = src include

>You can also use vpath (lowercase) to be more precise about the file type and its search directory. For example,

># Search for .c files in "src" directory; .h files in "include" directory
># The pattern matching character '%' matches filename without the extension
>vpath %.c src
>vpath %.h include

此second link确认：

  

VPATH代表虚拟路径