防止GNU make在环境变量中扩展美元符号 [英] Prevent GNU make from expanding dollar signs in environment variables

问题描述

有什么方法可以使GNU Make在环境变量中按字面意义解释美元符号吗?

Is there any way to make GNU Make interpret dollar signs literally in environment variables?

获取此makefile:

Take this makefile:

echoFOO:
        echo '$(FOO)'

像这样运行它:

$ FOO='a$bc' make
echo 'ac'
ac

我希望这能从字面上回显a $ bc，但是我找不到找到让GNU Make摆脱我的环境变量困扰的方法.

I'd like this to echo a$bc literally, but I can't find a way to get GNU Make to keep its damn hands off my environment variables.

推荐答案

两种获得所需结果的方法，我可以看到.两者都需要权衡.

Two ways to get the result you want that I can see. Trade-offs with both.

$ cat Makefile
all: echoFOO echovFOO

echoFOO:
        echo '$(FOO)'

echovFOO:
        echo '$(value vFOO)'
$ FOO='a$$bc' vFOO='a$bc' make
echo 'a$bc'
a$bc
echo 'a$bc'
a$bc

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