get an error when execute go build
SET GOOS=linux
SET GOARCH=386
SET CGO_ENABLED=1
SET CXX=mingw32-g++
SET CC=mingw32-c++
..\gopkg.in\rana\ora.v3\conn.go:51: undefined: Env
..\gopkg.in\rana\ora.v3\conn.go:52: undefined: Ses
..\gopkg.in\rana\ora.v3\pool.go:63: undefined: Env
..\gopkg.in\rana\ora.v3\pool.go:64: undefined: SrvCfg
..\gopkg.in\rana\ora.v3\pool.go:65: undefined: SesCfg
What do I need to compile, pls help.