Cross compilation is easy with Go and there are numerous articles on how to do it. However, there are some caveats. Specifically the standard library must be built for the lowest common denominator you want to support for each platform. Here’s how I do it for syncthing. This assumes you have a Go source tree checked out into /usr/local/go.
cd /usr/local/go/src
./all.bash # Build Go for your native architecture/OS
export GOARM=5 # ARMv5 is the lowest supported ARM architecture
GOOS=linux GOARCH=arm ./make.bash --no-clean # Build linux/arm
export GO386=387 # This disables SSE/SSE2 requirements for 32 bit builds
# Here we build for 32+64 bit platforms
for os in linux windows freebsd ; do
GOOS=$os GOARCH=386 ./make.bash --no-clean
GOOS=$os GOARCH=amd64 ./make.bash --no-clean
done
# Now we build for 64-bit only platforms
for os in darwin solaris ; do
GOOS=$os GOARCH=amd64 ./make.bash --no-clean
done
When this is done, you can use the ./build.sh all command in the syncthing dist. Solaris supports requires Go1.3.
You should install go vet after recompiling Go;
go get code.google.com/p/go.tools/cmd/vet
