Re: [PATCH 0/2] poewrpc/Boot: Fix cross compiling with clang

[Joel Stanley]

On Tue, 6 Nov 2018 at 09:07, Nick Desaulniers <ndesaulniers@xxxxxxxxxx> wrote:
>
> On Sun, Nov 4, 2018 at 3:11 PM Joel Stanley <joel@xxxxxxxxx> wrote:
> >
> > Hello,
> >
> > These patches allow clang to cross-compile the powerpc boot wrapper.
> > The boot wrapper constructs it's own compiler flags as it may not be
> > built for the same arch as the kernel.
>
> Hi Joel, thanks for the series!  I'm just curious, how does the boot
> wrapper run on a different arch than the kernel?

The kernel can have a ppc32 boot wrapper for a ppc64 kernel. There's
some rationale in the boot wrapper's Makefile:

 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/powerpc/boot/Makefile#n10

Cheers,

Joel