[Insight-developers] ITKExamples: Linker issues with an itk build with vtk

[Bill Lorensen]

I agree that it needs to be fixed (somehow) in ITK. But these examples
should work with and ITKv4 release. These cmake lines allow that.

On Tue, Nov 13, 2012 at 2:27 PM, David Doria <daviddoria at gmail.com> wrote:
> On Tue, Nov 13, 2012 at 2:20 PM, Bill Lorensen <bill.lorensen at gmail.com> wrote:
>> Matt,
>>
>> I built the examples against my own ITK that included the vtk glue
>> classes. In order to get the examples to link I had to add
>> if(ITKVtkGlue_LOADED)
>>   find_package( VTK REQUIRED )
>>   if( ${VTK_FOUND} )
>>     include( ${VTK_USE_FILE} )
>>   endif()
>> endif()
>>
>> to
>> src/Examples/CMakeLists.txt
>>
>> This could very well be an ITK issue, but these changes allowed me to
>> build and link the examples.
>>
>> Bill
>
> I believe I have seen several variants of this problem when building
> other projects against ITK with ITKVtkGlue turned ON. Shouldn't ITK
> already make VTK available to the client project? You shouldn't be
> able to turn ITKVtkGlue on when building ITK if VTK is not found, so
> one would assume that ITK has already included VTK since it requires
> it. Then why should the client have to include it again?
>
> And potentially the same problem - I've had projects that do NOT
> require VTK fail to link when built against an ITK build with
> ITKVtkGlue turned on because they could not find VTK libs (even though
> they don't require them).
>
> Summary - I think this is something that needs to be fixed in ITK (ITKVtkGlue).
>
> David



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