From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <54E5F180.9010504@xenomai.org>
Date: Thu, 19 Feb 2015 15:21:52 +0100
From: Philippe Gerum <rpm@xenomai.org>
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 <54E5F030.6060403@xenomai.org>
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Subject: Re: [Xenomai] Compiling issue Xenomai 3.0 rc3
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To: Michael Smith <2michael.smith@gmail.com>, xenomai@xenomai.org

On 02/19/2015 03:16 PM, Philippe Gerum wrote:
> On 02/19/2015 02:40 PM, Michael Smith wrote:
>> Hi. I'm having trouble compiling the newest release (Xenomai 3.0-rc3).
>> With the error
>>
>> autotune.c: In function ‘main’:
>> autotune.c:298:16: error: ignoring return value of ‘daemon’, declared with
>> attribute warn_unused_result [-Werror=unused-result]
>>           daemon(0, 0);
>>
>> Is there an way to override the -Werror flags so it doesn't break on
>> warnings without editing the make files?
>> Or is the policy on Xenomai to always compile cleanly without warnings.
> 
> There is a strong policy to always compile without any warning. It
> turned out that none of the libc headers I'm building against over 7 CPU
> architectures sets the warn_unused_result attribute on the daemon()
> routine yet.
> 

The reason is due to a weak FORTIFY_LEVEL in some cases, others just
don't even plan for enabling __wur on daemon().

-- 
Philippe.