What platform should I target code for?

[mjg59]

I'm planning on porting Dasher (http://www.inference.phy.cam.ac.uk/dasher) to Amiga-like OSs. I'd like it to run on as wide a range of machines as possible, which presumably means compiling it for 68k. However, there's a chance that the performance from that won't be sufficient, in which case I'll need to build PPC code. Ideally a single build will run on 3.x machines with PPC cards, MorphOS and AOS 4. What should I be targetting?

[mjg59]

Karlos wrote:
Making a single build for all 3.x PPC / OS4 / MOS is basically limiting yourself  to the minimum intersection of all three. Specific benefits brought in since OS4/MOS will not be available to you if you follow this rule.

Abstract, make use of each systems strengths to implement your own codebase interface, and be happy :-D

Heh. All the complicated code is cross-platform anyway - we're only talking about ~2000 lines of Amiga code. I'm not sure that there are really any new features that would be terribly useful to me, but is there any documentation on API additions in MorphOS or 4.0?