Adding additional output formats to compiler-jx?

Hello,
I'm interested in a possibility of attempting to add a native target to the compiler, and I saw that the [docs] https://apache.github.io/royale-docs/compiler) mention that:
> It is relatively straightforward to add additional output formats to the compiler.

Is there any rundown of what is needed to add an additional output format, or just any more info about this in general?