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From: Michael Ellerman <mpe@ellerman.id.au>
To: Jim Davis <jim.epost@gmail.com>
Cc: Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
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Subject: Re: [PATCH] cxl: Fix error handling
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Jim Davis <jim.epost@gmail.com> writes:

> On Sun, Oct 30, 2016 at 10:37 PM, Michael Ellerman <mpe@ellerman.id.au> wrote:
>> 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