I don't know about OpenBSD and LLVM, but Go has made good on the Go 1 compatibility promise, with only a few minor changes being disputed as wether they break i

I don't know about OpenBSD and LLVM, but Go has made good on the Go 1 compatibility promise, with only a few minor changes being disputed as wether they break it or not. Go 2.0 will probably be a different story, assuming it ever comes out, but I have a hard time believing the devs will release anything that won't be fixable using the "go fix" tool.