From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Wed, 30 Nov 2005 15:00:50 +0100
From: Philippe Gerum <rpm@xenomai.org>
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Subject: Re: [Xenomai-help] using mq_receive and mq_send
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To: "Landau, Bracha" <BLandau@domain.hid>
Cc: xenomai@xenomai.org.

Landau, Bracha wrote:
> I am using Xenomai on the MPC8272ADS board with kernel 2.6.14.3.
> 
> I've created an application that uses posix message queuing from xenomai.
> 
> When I call mq_open, mq_close, mq_setattr, mq_getattr, mq_unlink - the calls succeed.
> 
> When I call mq_receive or mq_send, the call fails (returns -1) and errno is set to 1 (Operation not permited).
> 
> I put some debugging printk's into the xenomai code and it seems it doesn't even get to the call to __mq_receive or __mq_send from syscall.c (it does get to printk's that I put in  the other __mq_* functions).
> 
> Can anyone help?
> 

You must link your app with the flags output by "xeno-config 
--posix-ldflags". Have a look at skins/posix/demos/Makefile for a 
working example.

-- 

Philippe.