在makefile中为仅一组文件创建规则 [英] Create rule in makefile for just a set of files

问题描述

我正在编写一个Makefile，并且想对通配符使用通用规则，例如

I am writing a Makefile, and I want to use a generic rule with wildcards, like

%: bkp/%
    cp $< $@

但是我希望该规则仅对一些特定文件有效.我想用列表定义一个变量，例如

But I wanted this rule to be valid only for a few specific files. I wanted to define a variable with the list, for example

file_list = foo.c bar.c zzz.c

file_list = foo.c bar.c zzz.c

并配置规则，使其仅对此变量中列出的文件有效.我该怎么办?

and configure the rule so it is only valid for files that are listed in this variable. How do I do that?

推荐答案

您需要静态模式规则:

file_list = foo.c bar.c zzz.c

$(file_list): %: bkp/%
        cp $< $@

语法非常类似于隐式模式规则您正在使用.是的，它通常更安全(更可预测).

The syntax is very similar to the implicit pattern rule you were using. And yes, it's generally safer (more predictable).

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