在Windows上交叉编译Golang程序时将环境变量限制为只能命令

Question

I'm cross compiling Golang programs on Windows for Linux, using:

go build -o myprog.bin myprog.go

To do so I have to set the environment variable GOOS=linux. As I'm also compiling some programs for windows, when I'm done with the cross compile I have to reset GOOS=windows. So I have a batch file as follows:

set GOOS=linux
go build -o myprog.bin myprog.go
set GOOS=windows

If I happen to be compiling two programs for each Linux and Windows simultaneously, the windows program may get compiled for Linux. Is there a way to limit the scope of an environment variable to a command on windows, or to override it for a command? eg

go build -o myprog.bin myprog.go -GOOS linux

I know goxc provides this, but can go build?

Answer 1

To build upon Greg's answer which explains that changes using the set command are limited to the process, if you want to limit scope of environment variable changes within a process, use the setlocal and endlocal commands. This allows you to isolate variables within a single command process.

setlocal
set GOOS=linux
go build -o myprog.bin myprog.go
endlocal
:: GOOS will now equal what it was before being set within the scope