使用os / exec命令从Windows交叉编译到Linux

Question

The title mostly says it. I know that I can do

set GOOS=linux
set GOARCH=amd64

in cmd before I go build , but I'm trying to write a build script and do it all with exec.Command.

My go build -o etc works with exec.Command (it builds), but when printing out GOOS in a test script after either of this commands:

cmd := exec.Command("set", "GOOS=linux")
// OR
cmd := exec.Command("set GOOS=linux")

I get windows .

Any ideas? Thanks!

Answer 1

I strongly suggest you just use a tool like Gox instead. It cross-compiles into every supported build target by just executing gox . It also has options if you only want to build for certain targets.

As for the code you're asking about, exec.Command doesn't create a new process, or really do anything other than create a Cmd struct. The os/exec documentation (specifically the docs for the Command function) has an example of what you seem to be trying to do- execute another program with custom environment variable assignments... see the Example (Environment) section of the linked documentation and try to follow that structure if you still want to cross-compile your way.