[英]Shell script to export environment variables in make
I want to use a ksh script to set up some environment variables that my makefile will later use. 我想使用ksh脚本来设置一些我的makefile以后将使用的环境变量。 I tried to do: 我试着这样做:
setup:
. myscript
But it gives me errors like [[: not found
. 但它给了我一些错误,如[[: not found
。
Is there a way to use an external script to load environment variables for make? 有没有一种方法可以使用外部脚本来加载make的环境变量?
You could change the shell used in the makefile: 您可以更改 makefile中使用的shell :
SHELL = /usr/bin/ksh # Or whatever path it's at
But it's probably a good idea to convert the script to something compatible with /bin/sh
(ideally completely POSIX-compatible) if you want it to work smoothly on other platforms. 但是 ,如果您希望它在其他平台上顺利运行,那么将脚本转换为与/bin/sh
兼容的东西(理想情况下完全与POSIX兼容)可能是个好主意。
Beware, this will probably not work as intended: as each Makefile command is executed in its own subshell, sourcing myscript
will modify only the local environment, not the whole Makefile's one. 请注意,这可能无法按预期工作:由于每个Makefile命令都在其自己的子shell中执行,因此采购myscript
仅会修改本地环境,而不会修改整个Makefile的环境。
example: 例:
debug: setup
@echo "*** debug"
export | grep ENVVAR || echo "ENVVAR not found" #(a)
setup:
@echo "*** setup"
export ENVVAR=OK; export | grep ENVVAR || echo "ENVVAR not found" #(b)
export | grep ENVVAR || echo "ENVVAR not found" #(c)
output: 输出:
$ make debug
*** setup
export ENVVAR=OK; export | grep ENVVAR || echo "ENVVAR not found" #(b)
export ENVVAR='OK'
export | grep ENVVAR || echo "ENVVAR not found" #(c)
ENVVAR not found
*** debug
export | grep ENVVAR || echo "ENVVAR not found" #(a)
ENVVAR not found
As you can see, ENVVAR is found only in command (b), but commands (a) and (b) are executed in a new, clean environment. 如您所见,ENVVAR仅在命令(b)中找到,但命令(a)和(b)在新的干净环境中执行。
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