CODEWITHSUNDEEP
windowsmakefileenvironment-variables
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silentCode

Reputation: 65

makefile set environment variables in window

I write a makefile to set a environment variables in windows,but it does not work. like this

local:
    set CONFIGOR_ENV=local
    echo %CONFIGOR_ENV%

then i exec it,it print

set CONFIGOR_ENV=local
echo %CONFIGOR_ENV%
ECHO 处于关闭状态。

then i got it **It's not possible for a makefile to set up your environment. A makefile runs commands in a separate instance of a shell. Just like if you have two cmd.exe windows open and you set a variable in one of them, it's not set in the other one. That's the same way make works. **

so i update it,

local:
    set CONFIGOR_ENV=local ^
    echo %CONFIGOR_ENV%

but it print the same massage

set CONFIGOR_ENV=local ^
echo %CONFIGOR_ENV%
ECHO 处于关闭状态。

i also try the oneshell

.ONESHELL:
local:
    set CONFIGOR_ENV=local ^
    echo %CONFIGOR_ENV%

print:

set CONFIGOR_ENV=local ^
echo %CONFIGOR_ENV%
ECHO 处于关闭状态。

make version:

GNU Make 3.82.90
Built for i686-pc-mingw32
Copyright (C) 1988-2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

I want to know that can makefile set enviranment variables in windows?

Upvotes: 0

Views: 818

Answers (1)

MadScientist
MadScientist

Reputation: 100866

I'm not sure why you're using ^ here. That escapes a character: it doesn't seem like it's useful in this context.

You can either write:

local:
        set CONFIGOR_ENV=local & echo %CONFIGOR_ENV%

(in Windows batch files, & is a command separator sort of like ; in POSIX shell) or you can use .ONESHELL, if your version of make supports it, but you should remove the ^; by adding ^ you simply escape the newline so the entire thing is assigned to the variable; that is, you're running:

set CONFIGOR_ENV=local  echo %CONFIGOR_ENV%

so after this the value of the CONFIGOR_ENV variable will be local echo.

Upvotes: 2

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