Micropython is also doing something similar to what I've described. Like I said, it's really not that complicated once you figure it out, see their Makefile: https://github.com/micropython/micropython/blob/master/ports/rp2/Makefile
@ndabas started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Micropython is also doing something similar to what I've described. Like I said, it's really not that complicated once you figure it out, see their Makefile: https://github.com/micropython/micropython/blob/master/ports/rp2/Makefile