I got my current kernel to build but when I try to make build it stops with:

ld -s -N -T 
/usr/src/sys/arch/macppc/stand/ofwboot/../fixcoff/elf32_powerpc_merge.x -e
_entry  -Ttext 6c0000 -Bstatic -o ofwboot.mrg  Xcoffxtra.o  Locore.o boot.o
ofdev.o net.o netif_of.o alloc.o ofwmagic.o vers.o
/usr/src/sys/arch/macppc/stand/ofwboot/obj/lib/sa/libsa.a
/usr/src/sys/arch/macppc/stand/ofwboot/obj/lib/z/libz.a
/usr/src/sys/arch/macppc/stand/ofwboot/obj/lib/kern/libkern.a
objcopy -O aixcoff-rs6000 -R .comment -R .note  ofwboot.mrg ofwboot.xcf
/usr/src/sys/arch/macppc/stand/fixcoff/obj/fixcoff ofwboot.xcf
/usr/src/sys/arch/macppc/stand/fixcoff/obj/fixcoff: not found

cheers, 

Matthew