This is what we did for Mozart/Oz [1]. We have a compiler for "proto-Oz" written in Scala. We use it to compile the real compiler, which is written in Oz. Since

This is what we did for Mozart/Oz [1]. We have a compiler for "proto-Oz" written in Scala. We use it to compile the real compiler, which is written in Oz. Since the Scala compiler produces inefficient code, we then recompile the real compiler with itself. This way we finally have an efficient real compiler producing good code. This is all part of the standard build of the language. [1] https://github.com/mozart/mozart2 https://github.com/mozart/mozart2