[bbbbbr]

GBDK went mostly unmaintained for around ~20 years, and so it stagnated a bit. It has recently been upgraded to a modern version of the SDCC compiler with better optimization, and has seen bug fixes and a bunch of other improvements.

https://github.com/gbdk-2020/gbdk-2020

[propertymagnate]

Oh that's excellent, I didn't realise it had been picked up again. Cheers!