From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Thu, 29 Dec 2011 18:56:44 +0100
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai-help] [xenomai-help] Error return with a4l_sync_write
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To: Hadrien Caron <hadrien.caron@domain.hid>
Cc: xenomai@xenomai.org

On 12/29/2011 06:22 PM, Hadrien Caron wrote:
> Hello !
> 
> Sorry for the delay, I was out of town for the week.
> Hope you all had a nice christmas.
> Thanks for the input. In fact I am sorry but I didn't find what it means to
> compile with -fno-omit-frame-pointer
> 
> I found a SCHED_OMIT_FRAME_POINTER option in the kernel but it was already
> enabled so I doubt you were talking about that.
> 
> Is it an option to pass to the compiler ? I found -fomit-frame-pointer in
> the gcc manual . . . Should I modify xenomai's Makefile to add this option
> to the compilation ?
> 
> Thanks again ! And happy new year ;)

It is an option to pass to gcc (every time there is -ffoo there is also
the -fno-foo). You can pass additional flags to gcc using configure
CFLAGS variable.

Using for instance:
/path/to/xenomai/configure CFLAGS="-fno-omit-frame-pointer -g -O2"

-- 
                                                                Gilles.