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Date: Tue, 07 Feb 2012 12:26:17 -0800
From: "H. Peter Anvin" <hpa@zytor.com>
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Subject: Re: Kconfig and toolchain dependencies
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To: Josh Triplett <josh@joshtriplett.org>
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>

On 02/04/2012 10:32 AM, Josh Triplett wrote:
>>
>> Does anyone have a feel for if this would be a good addition, and if so
>> where it best fits into the chain?
> 
> This seems like a *great* idea.  Unfortunately, a quick look at the
> implementation of kbuild suggests that it doesn't currently implement
> numeric comparisons (<, <=, >, >=), only equality (= and !=).  Most of
> the time, a Kconfig file will want to write "depends GCC >=
> some_version".
> 
> Looking at scripts/kconfig/expr.c, it doesn't look that hard to add,
> though.
> 

Range dependencies are probably useful in their own right, too.

	-hpa