Re: [Xenomai] xenomai-3.git next branch build failure

[Jeff Webb <jeff.webb@nta-inc.net>]

On 12/11/2014 03:37 PM, Gilles Chanteperdrix wrote:
> On Thu, Dec 11, 2014 at 12:45:51PM -0600, Jeff Webb wrote:
>> When trying to compile the 'next' branch of xenomai-3.git under Ubuntu 14.04, I get this error:
>>
>> Making all in autotune
>> make[2]: Entering directory `/home/webb-ja/deb/xenomai-3.git.test/utils/autotune'
>> gcc -DHAVE_CONFIG_H -I. -I../../include  -I/home/webb-ja/deb/xenomai-3.git.test/lib/cobalt/arch/x86/include -I/home/webb-ja/deb/xenomai-3.git.test/kernel/cobalt/arch/x86/include -DNDEBUG -O2 -D_GNU_SOURCE -D_REENTRANT -pipe -fstrict-aliasing -Wall -Wstrict-prototypes -Wmissing-prototypes -Wno-long-long -Wno-unused-parameter -Werror -D__XENO__ -D__IN_XENO__ -I/home/webb-ja/deb/xenomai-3.git.test/include/cobalt -I../../include    -MT autotune-autotune.o -MD -MP -MF .deps/autotune-autotune.Tpo -c -o autotune-autotune.o `test -f 'autotune.c' || echo './'`autotune.c
>> autotune.c: In function ‘main’:
>> autotune.c:298:9: error: ignoring return value of ‘daemon’, declared with attribute warn_unused_result [-Werror=unused-result]
>>     daemon(0, 0);
>>           ^
>> cc1: all warnings being treated as errors
>> make[2]: *** [autotune-autotune.o] Error 1
>> make[2]: Leaving directory `/home/webb-ja/deb/xenomai-3.git.test/utils/autotune'
>> make[1]: *** [all-recursive] Error 1
>> make[1]: Leaving directory `/home/webb-ja/deb/xenomai-3.git.test/utils'
>> make: *** [all-recursive] Error 1
>>
>> I see this sort of thing often due to Ubuntu's default compiler flags settings.  I applied the attached patch to fix it.
>
> Yes, thanks. I think Jorge already proposed a similar fix, but I can
> not find where I put it. So, I will take your patch. Just a note, is
> the "error" function defined for uclibc ?
>

Thans, Gilles.  I haven't used uclibc, but it looks like it is defined:

   http://git.uclibc.org/uClibc/tree/include/error.h

I just assumed that error() was okay, since it was used elsewhere in the file.

-Jeff