From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <511E4B65.5040403@xenomai.org> Date: Fri, 15 Feb 2013 15:51:17 +0100 From: Philippe Gerum MIME-Version: 1.0 References: <511B94E4.2070708@mediso.hu> <511B9901.7040104@xenomai.org> <511BB60E.7090900@mediso.hu> <511BCA3E.4050705@xenomai.org> <511C989C.7070700@mediso.hu> <511E2846.8040206@xenomai.org> <511E38CD.8080301@mediso.hu> In-Reply-To: <511E38CD.8080301@mediso.hu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai] Floating point operations in kernel on powerpc List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Norbert Bukuli Cc: xenomai@xenomai.org On 02/15/2013 02:31 PM, Norbert Bukuli wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Thank you again for your kind help! > I am really sorry for the confusing question. Now we are compiling > kernel modules only. Afterwards we port our application from RTAI, > kernelspace to Xenomai, kernelspace will we port from kernelspace to > userspace. > I found what makes the problem. The CONFIG_CC_OPTIMIZE_FOR_SIZE kernel > option was set on. After I turned it off, the compilation was successful. I guess you are referring to that issue brought in by gcc releases >= 4.4.x? http://www.mail-archive.com/linuxppc-dev@lists.ozlabs.org/msg17189.html http://gcc.gnu.org/ml/gcc-patches/2008-04/msg01678.html It looks like the suggested kernel patch to fix it did not make its way to the kernel. Bottom line is that it's not fpu related actually. This is definitely good material for the Xenomai wiki. -- Philippe.