linux-kernel - Re: CONFIG_ARCH_SUPPORTS

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Message-ID: <CAHmME9pE+G0V-nyKchQyG03YXbPjGykL1xX0M8E544Rh7QrgOQ@mail.gmail.com>
Date:   Tue, 31 Oct 2017 12:17:10 +0100
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Mark Rutland <mark.rutland@....com>
Cc:     linux-arm-kernel@...ts.infradead.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: CONFIG_ARCH_SUPPORTS_INT128 for AArch64

Hi Mark,

On Tue, Oct 31, 2017 at 11:43 AM, Mark Rutland <mark.rutland@....com> wrote:
> Judging by Documentation/kbuild/makefiles.txt, we could do something
> like the below in the arm64 Makefile:
>
> cflags-y += $(call cc-ifversion, -ge, 0500, -DCONFIG_ARCH_SUPPORTS_INT128)

Okay, in that case, I'll re-research the gcc commit that made int128
work properly on aarch64, confirm the release version, and then submit
a patch doing this.

Jason