如何在makefile中获取shell环境变量?

时间:2022-06-02 00:25:14

in shell when I enter

在我进入时的shell中

echo $demoPath

it prints

它打印

/usr/local/demo

how can I get this this variable of $demoPath in makefile?

如何在makefile中获取$ demo的这个变量?

1 个解决方案

#1


58  

If you've exported the environment variable:

如果您已导出环境变量:

export demoPath=/usr/local/demo

you can simply refer to it by name in the makefile (make imports all the environment variables you have set):

你可以简单地在makefile中通过名字引用它(make import你设置的所有环境变量):

DEMOPATH = ${demoPath}    # Or $(demoPath) if you prefer.

If you've not exported the environment variable, it is not accessible until you do export it, or unless you pass it explicitly on the command line:

如果您没有导出环境变量,则在导出它之前无法访问它,或者除非您在命令行上显式传递它:

make DEMOPATH="${demoPath}" …

If you are using a C shell derivative, substitute setenv demoPath /usr/local/demo for the export command.

如果您使用的是C shell派生,请将setenv demoPath / usr / local / demo替换为export命令。

#1


58  

If you've exported the environment variable:

如果您已导出环境变量:

export demoPath=/usr/local/demo

you can simply refer to it by name in the makefile (make imports all the environment variables you have set):

你可以简单地在makefile中通过名字引用它(make import你设置的所有环境变量):

DEMOPATH = ${demoPath}    # Or $(demoPath) if you prefer.

If you've not exported the environment variable, it is not accessible until you do export it, or unless you pass it explicitly on the command line:

如果您没有导出环境变量,则在导出它之前无法访问它,或者除非您在命令行上显式传递它:

make DEMOPATH="${demoPath}" …

If you are using a C shell derivative, substitute setenv demoPath /usr/local/demo for the export command.

如果您使用的是C shell派生,请将setenv demoPath / usr / local / demo替换为export命令。