Jim Davis [off-list ref] writes:

On Sun, Oct 30, 2016 at 10:37 PM, Michael Ellerman [off-list ref] wrote:

quoted

More here:

https://github.com/linuxppc/linux/wiki/Building-powerpc-kernels

Cool; the little-endian build worked fine, but

Yay, thanks for trying.

jim@krebstar:~/linux-rc$ make ARCH=powerpc
CROSS_COMPILE=powerpc64-linux-gnu- vmlinux
make: powerpc64-linux-gnu-gcc: Command not found
make: powerpc64-linux-gnu-gcc: Command not found
scripts/kconfig/conf  --silentoldconfig Kconfig
make: powerpc64-linux-gnu-gcc: Command not found

Ah sorry.

This is on Ubuntu 16.04; there's a /usr/bin/powerpc64le-linux-gnu-gcc
from installing gcc-powerpc64le-linux-gnu, and a
/usr/bin/powerpc-linux-gnu-gcc from installing gcc-powerpc-linux-gnu,
but no /usr/bin/powerpc64-linux-gnu-gcc.

It's the powerpc-linux-gnu-gcc one.

That is a 32 and 64-bit compiler, it's 32-bit by default, but the kernel
Makefiles will pass -m64 appropriately.

You can actually build a single compiler that builds 32/64-bit BE, and
64-bit LE, but the distros don't do that for whatever reason.

cheers