[Ctk-developers] Linking a shared library within a plugin

[Florian Ganglberger]

Hi Jc,
we've built a new shared library which calls our shared-tracker-library. It
works perfectly outside of our plugin and the tracker can connect. As soon
as we link the new shared library into the plugin, we have our connection
problem again. It calls the function, produces all the output, but can't
connect. So we can say that the* shared tracker library works for:*
*- a normal example program*:   example program --> shared tracker library
*- the main method of our ctk app:*   ctk app --> shared tracker library
*- called from a "normal" shared library: *   example program --> "normal"
shared library  --> shared tracker library

*and not for:*
*- the plugin* (which is a shared library): ctk plugin --> shared tracker
library
*- a call from a shared library which is called by the plugin*:  ctk
plugin --> "normal" shared library  --> shared tracker library

Actually we have no idea, why it doesn't work....

Thanks for your help,
Florian



2013/8/26 Florian Ganglberger <Florian.Ganglberger at student.i-med.ac.at>

> Hi Jc,
> we can't really use a debugger, since we don't have the code for the
> shared library, only the header files. The methods of the shared library is
> definitely called, because we get an error message that a connection to the
> tracker can't be established. Can it be a problem, that the plugins are
> also shared libraries? We'll write a shared library that calls the tracker
> today, so we can see if the problem depends on calling the tracker-library
> from a shared library or if it is ctk specific.
>
> Additional information: As far as we know, the tracker library was written
> in C (and not in C++)
>
> Thanks for your help,
> Florian
>
>
> 2013/8/24 Jean-Christophe Fillion-Robin <jchris.fillionr at kitware.com>
>
>> Hi Florian,
>> If it build without problem, did you try using a debugger to try to
>> understand what s wrong?
>> Jc
>>
>> --
>> Sent from my mobile device
>> On Aug 23, 2013 12:00 PM, "Florian Ganglberger" <
>> Florian.Ganglberger at student.i-med.ac.at> wrote:
>>
>>> Hi,
>>> we are trying to link a shared library to connect to tracker from a
>>> plugin. We know, that the code that calls the .so library works in a test
>>> application and also in the main method of our CTK application. After we
>>> have added our code to the plugin and linked it to the .so library, we can
>>> link and compile the code without errors, but we don't get a connection to
>>> the tracker.
>>> The cmakelists code to link the .so file in our test application is
>>> TARGET_LINK_LIBRARIES(optoExtern ${OPTOTRAK_LIBRARY})
>>> (${OPTOTRAK_LIBRARY} is the library path, optoExtern the project name)
>>>
>>> The cmakelists code to link the .so file in our plugin:
>>> ctkMacroBuildPlugin(
>>>   NAME ${PROJECT_NAME}
>>>   EXPORT_DIRECTIVE ${PLUGIN_export_directive}
>>>   SRCS ${PLUGIN_SRCS}
>>>   MOC_SRCS ${PLUGIN_MOC_SRCS}
>>>   UI_FORMS ${PLUGIN_UI_FORMS}
>>>   INCLUDE_DIRECTORIES ${Plugin_SOURCE_DIR}
>>>   RESOURCES ${PLUGIN_resources}
>>>   TARGET_LIBRARIES ${PLUGIN_target_libraries} ${OPTOTRAK_LIBRARY}
>>> )
>>>
>>> Has anyone an idea how to link external shared libraries within a plugin
>>> properly?
>>>
>>> Best regards,
>>> Florian Ganglberger
>>>
>>> _______________________________________________
>>> Ctk-developers mailing list
>>> Ctk-developers at commontk.org
>>> http://public.kitware.com/cgi-bin/mailman/listinfo/ctk-developers
>>>
>>>
>
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