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

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Thu, 2014-05-15 at 03:46 -0700, Guenter Roeck wrote:
> 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@high,-DHAVE_AS_ATHIGH=1)
> > KBUILD_AFLAGS += $(ashigh)
> >
> > might work.
> >
> 
> Yes, it does.

Care to send a patch ? :-)

Cheers,
Ben.