From mboxrd@z Thu Jan  1 00:00:00 1970
From: "George Pontis" <GPontis@z9.com>
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	<201305021037.24643.leo@alaxarxa.net>
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Date: Fri, 3 May 2013 09:29:29 -0700
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Subject: Re: [Xenomai] Qt - Xenomai compatibility problem
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To: 'Leopold Palomo-Avellaneda' <leo@alaxarxa.net>, xenomai@xenomai.org

> -----Original Message-----
> From: Leopold Palomo-Avellaneda [mailto:leo@alaxarxa.net]
> Sent: Thursday, May 02, 2013 1:37 AM
> To: xenomai@xenomai.org
> Cc: George Pontis
> Subject: Re: [Xenomai] Qt - Xenomai compatibility problem
> 
> A Dimarts, 30 d'abril de 2013, George Pontis va escriure:
> > I took a snapshot from git of the current Xenomai code and put it in the
> hands of the software
> > developers. They reported that Qt would not build after patching with
> Xenomai. The problem was that
> > Qt uses "signals" as a keyword, and that conflicts with the function
> prototype for rt_task_notify
> > under xenomai/native:
> >
> >
> > int rt_task_notify(RT_TASK *task, rt_sigset_t signals);
> >
> >
> > Although this is not a Xenomai problem, it might save some users the
> annoyance if the name "signals"
> > could change.
> 
> I'm not a C++ expert, but to solve this you must encapsulate all the Xenomai
> calls of your software in a namespace. After that, I think that you could use
> the signal word without problem of collision with another signal word.
> 
> Regards,
> 
> Leopold

That that won't work because Qt defines the keyword "signals" using #define,
which is handled by the preprocessor.  The preprocessor ignores namespaces
so namespaces wouldn't help in this case.

Geo.