Makefile追加两次通配符匹配(Makefile append wildcard match twice)

Makefile追加两次通配符匹配(Makefile append wildcard match twice)

我有像somename.in othername.in yetanothername.in输入文件，并希望他们在一个单独的文件夹作为输出： somename/somename.out othername/othername.out yetanothername/yetanothername.out

这怎么可以用Makefile来完成？ 这不起作用，因为通配符只能附加一次。

IN = somename.in othername.in yetanothername.in OUT = $(IN:%.in=%/%.out) all: @echo '${OUT}'

给出这个输出：somename /％。out othername /％。out yetanothername /％。out

I have input files like somename.in othername.in yetanothername.in and want them in a separate folder as output: somename/somename.out othername/othername.out yetanothername/yetanothername.out

How can this be done with a Makefile? This does not work, because the wildcard can only be appended once.

IN = somename.in othername.in yetanothername.in OUT = $(IN:%.in=%/%.out) all: @echo '${OUT}'

gives this output: somename/%.out othername/%.out yetanothername/%.out

最满意答案

这是一个肮脏的黑客，但这有效：

IN = somename.in othername.in yetanothername.in OUT = $(foreach file, $(IN:%.in=%), $(file)/$(file).out) all: @echo '${OUT}'

我不确定这是否是GNU制作特定的。

It's something of a dirty hack, but this works:

IN = somename.in othername.in yetanothername.in OUT = $(foreach file, $(IN:%.in=%), $(file)/$(file).out) all: @echo '${OUT}'

I'm not sure if this is GNU make-specific.