[solved]: Re: enabling cpu "features" in custom kernel

[Da Rock]

On 17/06/2016 20:20, Dimitry Andric wrote:
> On 16 Jun 2016, at 14:35, Da Rock <freebsd-hackers at herveybayaustralia.com.au> wrote:
>> I'm just trying to get my head around kernel building and clang.
>>
>> If I want to enable certain features available on my cpu which are available by clang, how do I enable them? As I understand it using ccflags is a no no (ie /etc/make.conf), so how do I go about enabling them? I seem to be missing something in my research here...
> You can set CPUTYPE in /etc/make.conf, for example:
>
> CPUTYPE?=broadwell
>
> then it will be automatically picked up in the correct places during
> buildworld, or during ports building.
>
> See also make.conf(5) and /usr/share/examples/etc/make.conf.
>
> -Dimitry
>
Thank you for that lead. It wasn't quite on it, but referring to 
/usr/share/mk/bsd.cpu.mk provided the answers I sought.