Well I know the SDL code a bit since I made some changes to it for my MorphOS ports of FreeSCI & Exult (speedups, LE graphics modes, overdrawing of other Ambient windows, ...). I have not noticed any huge changes that would affect the OS part for the last minor revisions. Haven't looked at the new release though. So I suppose the new version still compiles, maybe with small changes.

While I said I'm familiar with Gabriele's code don't ask me to maintain it, I'd be a very bad maintainer having no 68k compiler installed anymore ...

Besides, I checked the SDL site and it doesn't say anything about the Amiga version being discontinued. There is no Amiga archive for download, but AFAIR it has never been since the Amiga port never was "officially" supported.