[Click] Problem in building and using RTPClassifier

[Eddie Kohler]

Hey, just to avoid incorrect impressions:

On 5/9/11 11:00 PM, Cliff Frey wrote:
> I believe that this is telling you the error:
>    !!! Your kernel was compiled with CONFIG_MODVERSIONS.
>    !!! Click packages are often incompatible with CONFIG_MODVERSIONS.
>    !!! You may need to recompile your kernel and rebuild Click.
>
> Specifically, click cannot be loaded into recent linux kernels that
> are compiled with CONFIG_MODVERSIONS, because click ends up using
> symbols that are too long.

Not quite.  CLICK ITSELF loads without a problem.  The problem is that Click 
PACKAGES cannot be loaded on top of Click, because the kernel truncates 
Click's exported symbol names.

Eddie


> There was a recent message about this to
> the click mailing list.
>
> Cliff
>
> On Mon, May 9, 2011 at 7:36 PM, Faraz Haider<haider.faraz at gmail.com>  wrote:
>>
>> Hello,
>>
>> We are trying to build and use the RTP classifier element which is part of
>> the unibo_qos package.
>>
>> The unibo_qos package is from the click-packages-1.8.0.
>>
>> The click version is the latest from GIT.
>>
>> The system is Ubuntu 10.10 with kernel 2.6.35-28-generic.
>>
>> * WARNING MESSAGES RECEIVED AT BUILD/COMPILE TIME OF UNIBO_QOS WERE:*
>> --------------------------------------------------------------------------
>> /usr/local/bin/click-buildtool kversion>
>> /home/athar/Downloads/click-packages-1.8.0/unibo_qos/package/kversion.c
>>   CC [M] kversion.ko
>> /home/athar/Downloads/click-packages-1.8.0/unibo_qos/package/kversion.c:4:
>> note: #pragma message:
>>    !!!
>>    !!! Your kernel was compiled with CONFIG_MODVERSIONS.
>>    !!! Click packages are often incompatible with CONFIG_MODVERSIONS.
>>    !!! You may need to recompile your kernel and rebuild Click.
>>    !!!
>>   LD [M]
>> /home/athar/Downloads/click-packages-1.8.0/unibo_qos/package/unibo_qos.o
>>   Building modules, stage 2.
>>   MODPOST 1 modules
>>   CC
>> /home/athar/Downloads/click-packages-1.8.0/unibo_qos/package/unibo_qos.mod.o
>> /home/athar/Downloads/click-packages-1.8.0/unibo_qos/package/unibo_qos.mod.c:53:
>> warning: initializer-string for array of chars is too long
>> /home/athar/Downloads/click-packages-1.8.0/unibo_qos/package/unibo_qos.mod.c:53:
>> warning: (near initialization for ?____versions[33].name?)
>> /home/athar/Downloads/click-packages-1.8.0/unibo_qos/package/unibo_qos.mod.c:54:
>> warning: initializer-string for array of chars is too long
>> /home/athar/Downloads/click-packages-1.8.0/unibo_qos/package/unibo_qos.mod.c:54:
>> warning: (near initialization for ?____versions[34].name?)
>>   LD [M]
>> /home/athar/Downloads/click-packages-1.8.0/unibo_qos/package/unibo_qos.ko
>> make[3]: Leaving directory `/usr/src/linux-headers-2.6.35-28-generic'
>> make[2]: Leaving directory
>> `/home/athar/Downloads/click-packages-1.8.0/unibo_qos/package'
>> make[1]: Leaving directory
>> `/home/athar/Downloads/click-packages-1.8.0/unibo_qos/package'
>> --------------------------------------------------------------------------
>> * ERROR MESSAGE RECEIVED ON COMAMND LINE WHEN LOADING UNIBO_QOS:*
>> --------------------------------------------------------------------------
>> sudo click-install /path/to/bridge.click
>> insmod: error inserting '/usr/local/lib/unibo_qos.ko': -1 Invalid parameters
>> click-install: '/sbin/insmod /usr/local/lib/unibo_qos.ko' failed
>> --------------------------------------------------------------------------
>> * ERROR MESSAGE VIEWED FROM DMESG:*
>> --------------------------------------------------------------------------
>> [400112.490560] unibo_qos: no symbol version for
>> _Z12cp_va_kparseRK6VectorI6StringEPK7ElementP12ErrorHandlerz
>> [400112.490568] unibo_qos: Unknown symbol
>> _Z12cp_va_kparseRK6VectorI6StringEPK7ElementP12ErrorHandlerz (err -22)
>> [400112.490826] unibo_qos: no symbol version for
>> _ZN7Element16live_reconfigureER6VectorI6StringEP12ErrorHandler
>> [400112.490831] unibo_qos: Unknown symbol
>> _ZN7Element16live_reconfigureER6VectorI6StringEP12ErrorHandler (err -22)
>> --------------------------------------------------------------------------
>> Any help in resolving this problem will be appreciated.
>>
>> Thanks.
>>
>> Faraz Haider
>> _______________________________________________
>> click mailing list
>> click at amsterdam.lcs.mit.edu
>> https://amsterdam.lcs.mit.edu/mailman/listinfo/click
>
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