Re: [Xenomai] universal application binary: how to auto-detect Xenomai/RT-PREEMPT/vanilla kernel

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

On 01/14/2013 09:29 AM, Michael Haberler wrote:

> Hi,


Hi,

> 
> thanks to patience on this list we were able to build linuxcnc such
> that it runs on Xenomai, besides RT-PREEMPT, vanilla kernels (in a
> simulator/non-RT mode) and RTAI
> 
> 
> I'm planning to adapt linuxcnc such that a universal binary can be
> built which runs under Xenomai, RT-PREEMPT and vanilla kernels as
> this will simplify logistics quite a bit; what I'd like have is
> reliable auto-detection of the kernel type and 'do the right thing'
> (RTAI will remain a separate build).


I have no idea about preempt_rt, however, in order to detect xenomai,
you can check for /dev/rtheap. If it does not exist, xenomai programs
will not start anyway. Also, I guess for a universal binary, you would
dlopen xenomai libraries (native or posix, depending on the one you want
to use), if you want to do that, you have to pass --enable-dlopen-skins
to xenomai configure script.

Regards.

-- 
                                                                Gilles.