powerpc/ppc64: Allow allmodconfig to build (finally !)

[Guenter Roeck]

On 05/15/2014 02:47 AM, Alan Modra wrote:
> On Wed, May 14, 2014 at 08:34:30AM -0700, Guenter Roeck wrote:
>> Bummer. Confirmed, if I replace "@h" with "@high" in just one place,
>> the builds pass with binutils 2.24. Unfortunately the same builds then
>> fails with binutils 2.23.
>>
>> Any idea how to get it to compile with both old and new versions ?
>
> The standard way with GNU software would be to write a configure test,
> that checks for @high support in the assembler, and defines a macro
> if the assembler passes the check.  I'm not that familiar with the
> linux kernel these days, but a little grepping around says that
> something like
>
> ashigh := $(call as-instr,lis 9$(comma)foo at high,-DHAVE_AS_ATHIGH=1)
> KBUILD_AFLAGS += $(ashigh)
>
> might work.
>

Yes, it does.

Thanks!

Guenter