Cross-compilation of Go programs

Instead of just building a program with

$ go build

in the package directory. To cross-compile a pure Go program to run on a Raspberry Pi 2 machine running Linux run

$ GOOS=linux GOARCH=arm GOARM=7 go build

To cross-compile a Go program to run on a Raspberry Pi 2 machine running Linux but for the program involving CGO run

$ GOOS=linux GOARCH=arm GOARM=7 CGO_ENABLED=1 \
        CC=arm-linux-gnueabi-gcc go build

For the above command to work you need (on Debian) to install gcc-arm-linux-gnueabi.

While to cross-compile from an amd64 machine running Linux to the corresponding 32-bit i386 machine running Linux run

$ GOOS=linux GOARCH=386 go build

for the same cross-compilation but for the program involving CGO run

$ GOOS=linux GOARCH=386 CGO_ENABLED=1 go build

For the above command to work you need (on Debian) to install gcc-multilib (or if needed also g++-multilib).