Re: [gentoo-soc] Application for Google Summer of Code 2018-Mishal Roy

[Patrick Lauer]

On 03/22/2018 04:25 PM, Rich Freeman wrote:
> On Thu, Mar 22, 2018 at 12:07 AM, Benda Xu <heroxbd@g.o> wrote:
>>
>>> builds x86 linux kernel from source code present in /usr/src/linux
>>> directory of Gentoo liveDVD
>>
>> This is not how Gentoo ebuild works, the build should prepare the source
>> code.
>>
>
> I don't want to derail whatever your goals are here, but IMO an ebuild
> that actually builds a kernel would be useful.
>

https://github.com/adjust/gentoo-overlay/tree/master/sys-kernel

This just needs to be cleaned up a bit to be upstreamed, and so far I've
not had the time for it.

It's a solved problem (I'm aware of at least two other ebuilds to do the
same) :)

> However, such an ebuild shouldn't touch /usr/src.  If I were doing a
> kernel build ebuild I'd have it fetch kernel sources like any other
> package, then build it in the normal location, with configuration
> options provided via USE flags or some default config, and then
> install the final kernel in /boot.
>
> I realize that isn't how Gentoo has done it for the last 20 years, but
> I've always thought that it would make sense to have a way to actually
> maintain up-do-date kernels in the same manner as any other package,
> with the /usr/src approach being an also-supported alternative.
>
> That said, there are complications.  Some kernel modules want prepared
> (or even built) sources and this approach would clean those after
> install.  Also, we'd probably need to use subslots for initramfs
> rebuilds or something like that.  I suspect this is why it hasn't been
> done yet.
>
> Again, I don't want to derail SoC with this unless there was an intent
> to actually build a kernel this way...
>