Hi Peter,

you wrote in <199608120434.XAA14148@solutions.solon.com>:
> Say further that the 68040 runs a system built with '040 instructions

There are no special 68040 instructions which could be used in userland.

> How would I, on the '040 system, build a source tree with '030
> instructions, ...

So there is no need to rebuild your tree.

-- 
Matthias Scheler
tron@lyssa.owl.de