[yocto] Yocto 2.2 minimum kernel requirement

[Paul Eggleton]

On Mon, 31 Oct 2016 09:37:07 Khem Raj wrote:
> > On Oct 31, 2016, at 7:37 AM, Vuille, Martin (Martin) <vmartin at avaya.com>
> > wrote:
> > 
> > We are looking at upgrading from Yocto 1.8 to 2.2.
> > 
> > Yocto 2.2 has a minimum kernel requirement of 3.2.0.
> > 
> > This isn’t an issue for our target (ARMv5, Linux 4.4) but may be
> > an issue for our automated build machines (x86, Linux 2.6.32—CentOS 6.)
> > 
> > However, there is a note that says
> > “For x86 and x86_64, you can reset OLDEST_KERNEL
> > <http://www.yoctoproject.org/docs/2.2/mega-manual/mega-manual.html#var-OL
> > DEST_KERNEL> to anything down to 2.6.32 if desired.”
> > 
> > Is it possible to configure things such that we can keep supporting the
> > old kernel for the SDK while we support a more up-to-date kernel for the
> > target?
>
> I think that should be the default. We do not set it for x86/nativesdk case.
> File a ticket if thats not the case.

SDK_OLDEST_KERNEL is the variable that's supposed to be controlling this, but 
I noticed a couple of weeks ago that we aren't feeding SDK_OLDEST_KERNEL into 
glibc for nativesdk, so we should fix that - I've filed a bug [1] and will 
sort that out. I think we should probably set the SDK_OLDEST_KERNEL default 
for x86 to 2.6.32 at the same time - I assume there are no objections?

Cheers,
Paul

[1] https://bugzilla.yoctoproject.org/show_bug.cgi?id=10561

-- 

Paul Eggleton
Intel Open Source Technology Centre