Re: [Xenomai-core] [ANNOUNCE] Xenomai Example Repository

[Wolfgang Grandegger <wg@domain.hid>]

Jan Kiszka wrote:
> Wolfgang Grandegger wrote:
>> Jan Kiszka wrote:
>>> Hi,
>>>
>>> the new Xenomai example repository has been created. I don't want to
>>> repeat here what is explained already on the related wiki page, please
>>> have a look at
>>>
>>>     http://www.xenomai.org/index.php/Examples
>>>
>>> Instead, let me sketch what could be done next:
>>>
>>>  o Port existing examples, snippets, demos from ksrc/skins/* over, make
>>>    them compilable and runnable if required.
>>>
>>>  o Identify what kind of examples are lacking. You, the user, is needed
>>>    here. What do *you* think is missing, what would be helpful to show?
>>>
>>>  o Check what is needed to compile kernel-based examples over PPC 2.4.
>>>    Philippe indicated that some switches are likely missing (x86 is fine
>>>    already, other archs are 2.6-only).
>> Some time ago I sent a patch for RTnet using the "kernel CFLAGS
>> capturing" trick to get proper switches for 2.4:
>>
>> http://sourceforge.net/mailarchive/forum.php?thread_id=9493711&forum_id=24610
>>
>>
>> We could do the same trick here.
> 
> Yeah, I had a look at this before. The point is that I would prefer to
> keep things _simple_ and self-contained. This capturing requires some
> helper Makefile and complex call nestings that likely only people with
> advanced make and shell skills can understand and adopt to their projects.
> 
> But maybe things are that complicated already, and this is just
> different complexity. How do you compile simple out-of-tree modules
> against 2.4 PPC kernels? Are there any standard flags? Or is it
> different for each board or each compiler version or whatever?

I just cut and paste the flags from a kernel module make. For PPC, there 
are plenty of flags, not board but some are processor depended, but I'm 
unable to tell which one are really required. For this reason I like the 
module capturing trick.

Wolfgang.