[Xenomai-help] troubles with library inclusion

[Xenomai-help] troubles with library inclusion

[Daniele]

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Hello,

We are trying to use xenomai with analogy library

[xenomai 2.6.0, kernel 2.6.38.8]

Compiling the program  we got the following error:


"undefined reference to
a4l_open<http://www.xenomai.org/documentation/trunk/html/api/group__descriptor1__lib.html#ga810401871fe8005ee0157c6910f94466>
"

The compiler detects correctly the function prototypes but it can't found
their complete definition.

taking care of our MakeFile we also have read this:

https://mail.gna.org/public/xenomai-help/2011-07/msg00036.html

but we noticed that our makefile already contains this instructions for our
skin, native.

How could we get rid of this?

Thanks in advance
Best regards

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Re: [Xenomai-help] troubles with library inclusion

[Gilles Chanteperdrix]

On 01/11/2012 11:49 PM, Daniele wrote:
> Hello,
> 
> We are trying to use xenomai with analogy library
> 
> [xenomai 2.6.0, kernel 2.6.38.8]
> 
> Compiling the program  we got the following error:
> 
> 
> "undefined reference to
> a4l_open<http://www.xenomai.org/documentation/trunk/html/api/group__descriptor1__lib.html#ga810401871fe8005ee0157c6910f94466>
> "
> 
> The compiler detects correctly the function prototypes but it can't found
> their complete definition.
> 
> taking care of our MakeFile we also have read this:
> 
> https://mail.gna.org/public/xenomai-help/2011-07/msg00036.html
> 
> but we noticed that our makefile already contains this instructions for our
> skin, native.
> 
> How could we get rid of this?

You need to link with the libanalogy driver, so, simply add "-lanalogy"
on the compiler command line.

-- 
                                                                Gilles.

Re: [Xenomai-help] troubles with library inclusion

[Jakub Nowacki]

On 11 Jan 2012, at 22:53, Gilles Chanteperdrix wrote:

> On 01/11/2012 11:49 PM, Daniele wrote:
>> Hello,
>> 
>> We are trying to use xenomai with analogy library
>> 
>> [xenomai 2.6.0, kernel 2.6.38.8]
>> 
>> Compiling the program  we got the following error:
>> 
>> 
>> "undefined reference to
>> a4l_open<http://www.xenomai.org/documentation/trunk/html/api/group__descriptor1__lib.html#ga810401871fe8005ee0157c6910f94466>
>> "
>> 
>> The compiler detects correctly the function prototypes but it can't found
>> their complete definition.
>> 
>> taking care of our MakeFile we also have read this:
>> 
>> https://mail.gna.org/public/xenomai-help/2011-07/msg00036.html
>> 
>> but we noticed that our makefile already contains this instructions for our
>> skin, native.
>> 
>> How could we get rid of this?
> 
> You need to link with the libanalogy driver, so, simply add "-lanalogy"
> on the compiler command line.
> 

I had a similar problem. Namely, it was complaining about having undefined reference. I added the -lanalogy to the flags generated with 'xeno-config --skin=native --ldflags' and everything compiled and linked correctly, but when I start my application I get error:

/usr/xenomai/lib/libanalogy.so.1: undefined symbol: rt_dev_ioctl

I after adding -lrtdm after -lanalogy everything, again, complied and linked correctly, but I get new error:

librtdm.so.1: shared object cannot be dlopen()ed

If I add -lrtdm before -lanalogy, I get the previous undefined symbol. To be absolutely sure I don't have a problem with my Xenomai-2.6.0 setup, I recompiled and installed it, but I'm still getting the errors. It does not seem to be a problem with other Xenomai shared objects path, since other SO are loaded correctly (Xenomai native skin threads work fine).

Thanks for the help in advance.

Best wishes,

Jakub

Re: [Xenomai-help] troubles with library inclusion

[Gilles Chanteperdrix]

On 01/20/2012 06:18 PM, Jakub Nowacki wrote:
> 
> On 11 Jan 2012, at 22:53, Gilles Chanteperdrix wrote:
> 
>> On 01/11/2012 11:49 PM, Daniele wrote:
>>> Hello,
>>> 
>>> We are trying to use xenomai with analogy library
>>> 
>>> [xenomai 2.6.0, kernel 2.6.38.8]
>>> 
>>> Compiling the program  we got the following error:
>>> 
>>> 
>>> "undefined reference to 
>>> a4l_open<http://www.xenomai.org/documentation/trunk/html/api/group__descriptor1__lib.html#ga810401871fe8005ee0157c6910f94466>
>>>
>>> 
"
>>> 
>>> The compiler detects correctly the function prototypes but it
>>> can't found their complete definition.
>>> 
>>> taking care of our MakeFile we also have read this:
>>> 
>>> https://mail.gna.org/public/xenomai-help/2011-07/msg00036.html
>>> 
>>> but we noticed that our makefile already contains this
>>> instructions for our skin, native.
>>> 
>>> How could we get rid of this?
>> 
>> You need to link with the libanalogy driver, so, simply add
>> "-lanalogy" on the compiler command line.
>> 
> 
> I had a similar problem. Namely, it was complaining about having
> undefined reference. I added the -lanalogy to the flags generated
> with 'xeno-config --skin=native --ldflags' and everything compiled
> and linked correctly, but when I start my application I get error:
> 
> /usr/xenomai/lib/libanalogy.so.1: undefined symbol: rt_dev_ioctl
> 
> I after adding -lrtdm after -lanalogy everything, again, complied and
> linked correctly, but I get new error:
> 
> librtdm.so.1: shared object cannot be dlopen()ed

If you need to dlopen librtdm, please reconfigure xenomai passing:
--enable-dlopen-skins

-- 
                                                                Gilles.

Re: [Xenomai-help] troubles with library inclusion

[Jakub Nowacki]

On 20/01/12 18:22, Gilles Chanteperdrix wrote:
> If you need to dlopen librtdm, please reconfigure xenomai passing:
> --enable-dlopen-skins
>
Problem solved! Thanks a lot!

Cheers,

Jakub