> >> You *can* build with a non-biarch compiler, but then you need to point
> >> the kernel build system at a 32-bit toolchain to use for the 32-bit
> >> parts (via CROSS32_COMPILE).
> >
> > Jens built this one, using crosstool. It is
> >
http://userweb.kernel.org/~akpm/cross-compilers/power64-cross.tar.bz2
> >
> > It was all working happily until gcov came along :(
>
> You were lucky, yes. If your compiler would have been just a little
> bit older it wouldn't have been able to build 32-bit at all.
>
> Do you have a separate 32-bit PowerPC compiler?