linux-kernel - Re: How do arch/ppc and arch/powerpc differ?

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Date:	Sun, 2 Mar 2008 10:09:39 +0200
From:	Adrian Bunk <bunk@...nel.org>
To:	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: How do arch/ppc and arch/powerpc differ?

On Sun, Mar 02, 2008 at 04:02:56PM +0900, Tetsuo Handa wrote:
> Hello.
> 
> According to Documentation/SubmitChecklist,
> ppc64 is a good architecture for cross-compilation checking.
> I've just set up cross compiling environment for ppc64
> using "crossdev -t ppc64" on Gentoo 2007.0 environment.
> 
> Now I'm trying to modify Makefile to build kernel for ppc64.
> I've got a question here.
> 
>   ARCH            ?= powerpc
>   CROSS_COMPILE   ?= powerpc64-unknown-linux-gnu-
> 
> Which keyword ("ppc" or "powerpc") do I need to set for ARCH
> to do cross-compilation checking?

powerpc

> How do they differ?

Documentation/feature-removal-schedule.txt says:

What: The arch/ppc and include/asm-ppc directories
When: Jun 2008
Why:  The arch/powerpc tree is the merged architecture for ppc32 and ppc64
      platforms.  Currently there are efforts underway to port the remaining
      arch/ppc platforms to the merged tree.  New submissions to the arch/ppc
      tree have been frozen with the 2.6.22 kernel release and that tree will
      remain in bug-fix only mode until its scheduled removal.  Platforms
      that are not ported by June 2008 will be removed due to the lack of an
      interested maintainer.
Who:  linuxppc-dev@...abs.org


> Regards.

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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