Makefile:变量无法正确展开

我的Makefile结构有问题。

make commit.install 应该创造 foo.txt 然后把它放进某个文件夹。但是,make不会调用创建 foo.text .这意味着我得打电话 make foo.txt 创建文件本身,然后调用 做出承诺。安装 把这个复制过来。我认为make不扩展变量依赖性存在问题。

/普通。mk

src.install: ${INSTALLSRC}
        mkdir -p result
        for f in ${INSTALLSRC}; do \
                cp -a $$f result/.; \
        done

commit.install: src.install
        echo "finished"

clean:
        rm -rf result

./inner/nested/GNUmakefile

include ../common.mk

include Makefile

./inner/nested/Makefile

SRC=foo.txt

foo.txt:
        echo "hello world" > foo.txt

/内部/普通。mk

include ../../common.mk

INSTALLSRC=${SRC}

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