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From: Nikos Chantziaras <realnc@gmail.com>
Subject: [gentoo-user] Re: CFLAGs for kernel compilation
Date: Thu, 30 Apr 2015 03:01:21 +0300
Organization: Lucas Barks
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References: <5540C101.70906@ramses-pyramidenbau.de>	<20150429133315.0678687f@digimed.co.uk>	<CAPife4kqDapthAqAkpgtf77N3vJhyiCn3UoZWVAP9H+1xBwB=A@mail.gmail.com>	<5540DA1F.8030605@ramses-pyramidenbau.de> <pan.2015.04.29.13.35.30@googlemail.com> <mhrqsq$8s5$1@ger.gmane.org>
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On 30/04/15 02:52, Nikos Chantziaras wrote:
> On 29/04/15 16:35, Holger Hoffstätte wrote:
>> On Wed, 29 Apr 2015 15:18:23 +0200, Ralf wrote:
>>
>>> Damn, you're absolutely right.
>>>
>>> I just tested it using make V=1.
>>> kernel make does override CFLAGs from the outside.
>>>
>>> But that's interesting: my processor supports -march=core-avx2 and none
>>> of the linux kernel processor family uses this flag...
>>
>> https://github.com/graysky2/kernel_gcc_patch
>
> This is already applied when enabling the "experimental" USE flag. At
> least, that's what the docs claim:
>
>    $ equery uses gentoo-sources

However, I just checked and it's not being applied. So either the 
documentation is wrong, or the ebuild/eclass has a bug.