[Buildroot] Xenomai 3.0.1?

[Thomas Petazzoni <thomas.petazzoni@free-electrons.com>]

Hello Jerry,

On Thu, 28 Jan 2016 17:09:33 -0000, jerry at chordia.co.uk wrote:
> Running the xenomai prepare-kernel script against an externally sourced
> 3.18.26 kernel. Buildroot builds a bootable kernel and working FS but the
> Xenomai userland tools appear to be related to 2.X. 
> 
> How do I best get BR to install the latest stuff?

You need to adapt the Xenomai package in package/xenomai/ and also
probably the Xenomai Linux extension logic in
linux/linux-ext-xenomai.mk.

Note however that there is a *big* difference between Xenomai 2 and
Xenomai 3, and therefore this update is certainly not the easiest
Buildroot modification that you can imagine. Xenomai 3 can run on top
of PREEMPT_RT kernels, without the Xenomai co-kernel and Adeos
interrupt pipeline. This probably requires some fairly significant
changes in the Xenomai packaging.

In addition, since Xenomai 3 is rather new and so different from
Xenomai 2, we probably want to keep support for Xenomai 2 for a while,
which adds even more challenge to the task.

In fact, I didn't notice that Xenomai 3 was officially released, last
time I looked they were at the 3.0-rc stage, so I didn't bother doing
the Buildroot packaging. I might have a look some day, but that's
pretty far away on my TODO list, so if someone else wants to look at
it, it would definitely be great!

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com