From: Michal Marek <mmarek@suse.cz>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: "linux-kbuild@vger.kernel.org" <linux-kbuild@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@elte.hu>
Subject: Re: Kconfig and toolchain dependencies
Date: Fri, 24 Feb 2012 23:19:10 +0100 [thread overview]
Message-ID: <4F480CDE.8010605@suse.cz> (raw)
In-Reply-To: <4F2C51A5.1040800@zytor.com>
Dne 3.2.2012 22:29, H. Peter Anvin napsal(a):
> Right now, we don't have a good way to encode toolchain dependencies in
> Kconfig. This makes it hard to add optional features which depend on
> newer toolchain features.
>
> If we just add them, then it breaks all*config and randconfig on
> platforms with the older toolchains unless the user manually adds
> exclusion rules. This is bad for testing.
>
> It seems relatively straightforward to do if we were to manifest some
> CONFIG_ variables based on the target toolchain, e.g.
>
> CONFIG_GCC=0x040601
(sorry for the late reply)
It would be a bit tricky, because the toolchain version depends also on
CONFIG_CROSS_COMPILE. So Kconfig would need to know the semantics of
CONFIG_CROSS_COMPILE and CONFIG_GCC and the dependency of the latter on
the former.
Michal
next prev parent reply other threads:[~2012-02-24 22:19 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-03 21:29 Kconfig and toolchain dependencies H. Peter Anvin
2012-02-04 18:32 ` Josh Triplett
2012-02-07 20:26 ` H. Peter Anvin
2012-02-24 22:19 ` Michal Marek [this message]
2012-02-24 22:23 ` H. Peter Anvin
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