https://golang.org/doc/install
go build
GOOS=windows GOARCH=386 go build -o hello.exe
GOOS=darwin GOARCH=amd64 go build -o seance-go-mac
https://golang.org/doc/install
go build
GOOS=windows GOARCH=386 go build -o hello.exe
GOOS=darwin GOARCH=amd64 go build -o seance-go-mac