cross-compilation for go-gl applications

[Mads Horndrup]

Hi guys, I hope I'm posting this in the appropiate forum. It's difficult to find this kind of go-gl documentation.

I'm new to golang, but I'm experienced with OpenGL, usually through java wrappers. I'm using go-gl to access OpenGL through Go. I'm on a windows 10, 64-bit

For go-gl applications, how would cross-compilation work?

I read here that cross-compilation got better in go 1.5, and that now we can do this

env GOOS=darwin GOARCH=386 go build hello.go

^Sidequestion: What do I have to do to make this work in the windows cmd?

To get go-gl installed I just ran go get on these (while having a 64-bit windows gcc in path):

"github.com/go-gl/gl/v4.1-core/gl"

"github.com/go-gl/glfw/v3.2/glfw"

"github.com/go-gl/mathgl/mgl32"

The gcc requirement makes me think the compiled go-gl application will somehow be tied to my system and arch. 

Is it possible to build for other platforms than the one I have compiled it on? How does the gcc affect how my application can be cross-platform?

[Aram Hăvărneanu]

Those packages use cgo, so you will need a gcc-based toolchain for

your target platform. Either you will have to build it yourself

(doing that on Windows is probably challenging), or perhaps you can

find a prebuilt gcc (good luck with that). Make sure to install the

relevant OpenGL headers and libraries for your target and that your

cross-compiler can find them.

Then you can just do something like (substitute for your target):

CGO_ENABLED=1 CC=sparcv9-solaris2.12-gcc GOOS=solaris GOARCH=sparc64 go build foo

Depending on a few other factors you might or might not need to

explicitely set internal or external linking.

CGO_ENABLED=1 CC=sparcv9-solaris2.12-gcc GOOS=solaris GOARCH=sparc64 go build -ldflags='-linkmode=external' foo

If I were you, I would rather find a way to build natively.

--
Aram Hăvărneanu