Re: Fwd: RV: Math module not compiling

Hi Asier,

Thank you very much for input..! I will try out your method before testing
out the 64-bit option suggested by Doug.

I will test both and get back to you in a day or so.

Regards,
Rathin

On Wed, Jan 13, 2016 at 2:10 PM, Asier <[email protected]> wrote:

>
> Hi Rathin,
>
> I have been facing similar issues with a 32 bit Linux lately...
>
> I am using RTAI 4.1 and Ubuntu 14.04 32 bit and the glibc-libm that comes
> with Ubuntu doesn't work. It seems that the i386 glibc-libm from Ubuntu is
> not suitable for this new math library support and need and alternative way
> like in the x86_64.
>
> I decided to use newlib and after struggling a little bit with the
> building process I ended up building newlib with the following configure
> options:
>
> ./configure  --disable-shared --disable-multilib --with-newlib
> --host=i386-pc-sysv
>
> In order to build RTAI you might need to get the "export_newlib.h" file
> from RTAI CVS and copy to your rtai/base/math directory:
>
> Regards,
>
> Asier.
>
>
>
> De: Rtai [mailto:[email protected]] En nombre de Doug Renton
> Enviado el: lunes, 11 de enero de 2016 20:48
> Para: Rathin Dholakia
> CC: [email protected]
> Asunto: Re: [Rtai] Math module not compiling
>
> Are you using 32 bit Linux?? If so that is a difference, I use 64bit. I
> suspect there are serious differences between the two. I would re-install
> with 64 bit linux. I use openSUSE, no troubles..
>
> On 64 bit you need newlib first.
> I just followed Jan's directions. I looked at my "notes" and it is cut and
> paste from Jan's email
>
>
> **********************************************************
> Jan @ cut out address...
> Wed Oct 8 15:17:08 CEST 2014
>
>
> We just had this discussion...
>
> Download the latest RTAI version from CVS or from github:
> git clone https://github.com/ShabbyX/RTAI.git
>
> Read the file
> base/math/README.KLIBM
>
> On a 64bit system you might want to install newlib:
>
> cd /usr/local/src
> mkdir newlib
> cd newlib
> cvs -z 9 -d :pserver:anoncvs at sourceware.org:/cvs/src login
> cvs -z 9 -d :pserver:[email protected]:/cvs/src login
> # password: anoncvs
> cvs -z 9 -d :pserver:anoncvs at sourceware.org:/cvs/src co newlib
> mkdir install
> cd src/newlib
> ./configure --prefix=/usr/local/src/newlib/install --disable-shared
> CFLAGS="-O2 -mcmodel=kernel"
> make
> make install
>
> In the rtai menu go to
> Base system -> Other features:
> Enable "Mathfuns support in kernel"
> Nextline should have a "(1)" for NEWLIB
> "The installation directory of your chosen libm.a" should be set to
> /usr/local/src/newlib/install/lib
>
> Then make RTAI again.
>
> This should work.
>
>
>
> On 01/11/2016 01:55 PM, Rathin Dholakia wrote:
> > Dear Doug,
> >
> > I tried doing your method of building Newlib locally but that itself is
> > not building. its giving following error
> >
> > /usr/local/src/newlib/src/newlib/libc/include/_ansi.h:130:19: error:
> > missing binary operator before token "("
> >
> > and
> >
> > " Makefile:383: recipe for target 'argz_add.lo' failed
> > make[3]: *** [argz_add.lo] Error 1" "
> >
> > and whole bunch of other stuff. in short something big is wrong..
> >
> > Will have try different things to compile. but as an alternative I tried
> > installing default NewLib of ubuntu, which also didnt work.
> >
> > By the way my installation configuration is as follows:
> >
> > Ubuntu 14.10 32-bit
> > Kernel: 3.16.0
> > RTAI: 4.1
> >
> > Hardware:
> > Processor: i3 quad-core
> > RAM: 4 GB
> > Motherboard: Gigabyte
> >
> > Just in case if you require..
> > Rathin
> >
> >
> > On Mon, Jan 11, 2016 at 11:38 PM, Rathin Dholakia
> > <[email protected] <mailto:[email protected]>> wrote:
> >
> >     Dear Doug,
> >
> >     Thank you VERY MUCH for your help.. I did came across your name but
> >     not the same thread.!
> >
> >     I tried both 4.1 and 5.0test1 as well as vulcano.. got the same
> >     error... but I will try your method and let you know..!
> >
> >     Thanks a lot for tip..
> >
> >     Regards,
> >     Rathin
> >
> >     On Mon, Jan 11, 2016 at 11:13 PM, Doug Renton <[email protected]
> >     <mailto:[email protected]>> wrote:
> >
> >         Hi Rathin,
> >
> >         I had a math issue earlier in the summer and there were some
> >         tricks. Have you read through these two threads?
> >
> >         https://mail.rtai.org/pipermail/rtai/2015-September/026912.html
> >
> >         https://mail.rtai.org/pipermail/rtai/2014-October/026540.html
> >
> >         I've yet to try 5.1 though. So I'm not sure things are still
> >         100% the same.
> >           Doug
> >
> >
> >
> >
> >
> >
> >         On 01/11/2016 10:06 AM, Rathin Dholakia wrote:
> >
> >             Dear All,
> >
> >             That problem of math module not getting compiled got solved.
> >             I spent few
> >             hours and finally figured that since Ubuntu 12.04 they have
> >             changed the
> >             library directory structure. so the "libm.a" location  has
> >             been changed
> >             to "arch specific directory" and hence the make was not able
> >             to find it...!!
> >
> >             But now I am faced with another challenge that when I try to
> >             insert
> >             rtai_math.ko it shows "unknown symbol error."
> >
> >             My dmesg shows:
> >
> >             [  276.359092] rtai_math: Unknown symbol __get_cpu_features
> >             (err 0)
> >             [  276.359104] rtai_math: Unknown symbol gammaf_r (err 0)
> >             [  276.359112] rtai_math: Unknown symbol errno (err 0)
> >             [  276.359120] rtai_math: Unknown symbol __fpclassifyd (err
> 0)
> >             [  276.359137] rtai_math: Unknown symbol strtod (err 0)
> >             [  276.359146] rtai_math: Unknown symbol infinity (err 0)
> >             [  276.359152] rtai_math: Unknown symbol gamma_r (err 0)
> >             [  276.359162] rtai_math: Unknown symbol strtof (err 0)
> >             [  276.359170] rtai_math: Unknown symbol infinityf (err 0)
> >             [  276.359177] rtai_math: Unknown symbol
> >             _GLOBAL_OFFSET_TABLE_ (err 0)
> >             [  276.359185] rtai_math: Unknown symbol _dl_hwcap (err 0)
> >             [  276.359186] rtai_math: no symbol version for strlen
> >             [  276.359187] rtai_math: Unknown symbol strlen (err -22)
> >             [  276.359195] rtai_math: Unknown symbol __signbitd (err 0)
> >
> >
> >             Can anyone suggest what might be going wrong?
> >
> >             I am updating this thread so that any newbie like me if
> >             facing the same
> >             issue , can find it.
> >
> >
> >             Thank you,
> >
> >             Sincerely,
> >             Rathin
> >
> >
> >             On Mon, Jan 11, 2016 at 12:16 PM, Rathin Dholakia
> >             <[email protected] <mailto:[email protected]>
> >             <mailto:[email protected]
> >             <mailto:[email protected]>>> wrote:
> >
> >                  Dear Members,
> >
> >                  First of all I am new to RTAI domain and have to admit
> >             I am blown by
> >                  the efforts of community. My sincerest gratitude for
> >             such an amazing
> >                  development..!
> >
> >                  Now to my query, I am trying to implement a RTAI system
> >             with
> >                  RTAI-4.1 on Kernel 3.16.0 using x86 patch. Basically I
> >             am trying to
> >                  port a old RTAI 3.6 to new rtai-4.1.
> >
> >                  Everything went fine, I ran test and latencies are also
> >             good. But I
> >                  am not able to build the Math module, as soon as I turn
> >             "math
> >                  option" ON in "other features" RTAI fails to compile.
> >
> >                  Can someone guide, How to work around it? I saw the
> >             archived post of
> >                  "Kernel math error" & missing exportlib.h but I
> >             couldn't figure out
> >                  what to do.
> >
> >
> >                  Sincerely,
> >                  Rathin
> >
> >
> >
> >
> >             --
> >             Rathin A. Dholakia
> >             "Dont GO through life, GROW through life"
> >
> >
> >             _______________________________________________
> >             Rtai mailing list
> >             [email protected] <mailto:[email protected]>
> >             https://mail.rtai.org/cgi-bin/mailman/listinfo/rtai
> >
> >         _______________________________________________
> >         Rtai mailing list
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> >         https://mail.rtai.org/cgi-bin/mailman/listinfo/rtai
> >
> >
> >
> >
> >     --
> >     Rathin A. Dholakia
> >     "Dont GO through life, GROW through life"
> >
> >
> >
> >
> > --
> > Rathin A. Dholakia
> > "Dont GO through life, GROW through life"
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-- 
Rathin A. Dholakia
"Dont GO through life, GROW through life"

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