Håkan Thörngren has created the Calypsi cross-compiler tool chain https://www.calypsi.cc/. It targets the 68000 (and soon 68020+), 65816/6502 features a nice compiler, assembler and linker, and the documentation is really neat, check it out !
It allows coding PC-relative code, writing interrupt handlers etc.
This compiler is under active development and its primary target are the Foenix Retro System computers http://c256foenix.com.
Since this compiler is under active development, we can still provide feedback and influence its development. I asked Håkan if we could support producing Atari-compatible output (executable, DRI/GST ?), he said we would consider it if there is enough interest.
So please post here to manifest your interest ! Then we can come to Håkan and show it ! He also accepts donations so that might also be an incentive to get that job done
He's really nice and very talented ; must be to have come up with a whole compiler toolchain by himself !He also has his own room "ht313" in Foenix Retro Systems discord server https://discord.gg/2GB47Vjf if you want to follow the development.
Vinz/MPS
