I have installed go in OpenBSD with pkg_add go
I got version go1.5.3
Below are my outputs.
#go version
go version go1.5.3 openbsd/amd64
go env
GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="openbsd"
GOOS="openbsd"
GOPATH=""
GORACE=""
GOROOT="/usr/local/go"
GOTOOLDIR="/usr/local/go/pkg/tool/openbsd_amd64"
GO15VENDOREXPERIMENT=""
CC="cc"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0"
CXX="c++"
CGO_ENABLED="1"