From: Alan Modra <amodra@gmail•com>
To: Guenter Roeck <linux@roeck-us•net>
Cc: Stephen Rothwell <sfr@canb•auug.org.au>, linuxppc-dev@lists•ozlabs.org
Subject: Re: powerpc/ppc64: Allow allmodconfig to build (finally !)
Date: Thu, 15 May 2014 19:17:16 +0930 [thread overview]
Message-ID: <20140515094716.GQ5162@bubble.grove.modra.org> (raw)
In-Reply-To: <20140514153430.GA28553@roeck-us.net>
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.
> Is there some predefined constant which I could possibly use for
> something like
>
> .if as_version_below_2.24_
> oris reg,reg,(expr)@h;
> .else
> oris reg,reg,(expr)@high;
> .endif
>
> Thanks,
> Guenter
--
Alan Modra
Australia Development Lab, IBM
next prev parent reply other threads:[~2014-05-15 9:47 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-12 5:57 [PATCH] powerpc/ppc64: Allow allmodconfig to build (finally !) Benjamin Herrenschmidt
2014-05-13 0:28 ` Guenter Roeck
2014-05-13 9:16 ` Benjamin Herrenschmidt
2014-05-13 12:35 ` Guenter Roeck
2014-05-13 17:17 ` Guenter Roeck
2014-05-14 3:34 ` Stephen Rothwell
2014-05-14 5:16 ` Guenter Roeck
2014-05-14 5:52 ` Alan Modra
2014-05-14 15:34 ` Guenter Roeck
2014-05-15 9:47 ` Alan Modra [this message]
2014-05-15 10:46 ` Guenter Roeck
2014-05-15 12:22 ` Benjamin Herrenschmidt
2014-05-15 13:09 ` Guenter Roeck
2014-05-14 5:42 ` Alan Modra
2014-05-13 19:41 ` Guenter Roeck
2014-06-12 12:26 ` Guenter Roeck
2014-06-12 21:57 ` Benjamin Herrenschmidt
2014-06-12 22:17 ` Guenter Roeck
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