Re: Math module not compiling

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]> 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]>> 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"
>>
>>
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-- 
Rathin A. Dholakia
"Dont GO through life, GROW through life"

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