> this said, cross building using build.sh didn't work for me.

Cross-building from other OSes is currently broken, at least for 1.6.1
(it doesn't work from Linux/x86 either).

On the other hand, cross-building from the other NetBSD ports works
fine -- I'm happily using NetBSD/x86 to build my m68k kernel.

I'm not familiar with PPC macs, but you doubtless could install
NetBSD/ppc to do your cross-builds.

> somebody suggested it's because of the case insensitive file system,
> so you might want to create a "unix file system" partition and run
> on that.

Unfortunately not.  Linux uses an honest filesystem, and it doesn't
work either.

                                        Juliusz