have you tried using the cross build frame work?  note that imake
will define __$MACHINE__ so you can check for MACHINE specific
features in Imake.cf as well as cpu (MACHINE_ARCH) specific... eg,
you can check for __sgimips__ and define SgiMipsArchitecture, or
something...

note that Xmacppc builds from hw/netbsd, as well as an XFree86
server... i dunno if i made this work properly via "imake" builds
but it does via cross builds.  there may be linking issues... it's
all quite ugly...



.mrg.