[Insight-users] Error in compilation of WatershedImageFilter in a standalone

[Feng Ma]

Luis:

By the way, the Makefile I generated would include a VHDIO library which is 
my IO factory to/from ITK. It does not matter because I did not use it in 
this test project.

  I will also study the VolView plug in example. Thanks.

-Feng

>From: Luis Ibanez <luis . ibanez at kitware . com>
>To: Feng Ma <mafeng at hotmail . com>
>CC: insight-users at itk . org
>Subject: Re: [Insight-users] Error in compilation of WatershedImageFilter 
>in a standalone project
>Date: Wed, 17 Sep 2003 11:32:08 -0400
>
>Hi Feng,
>
>
>You are probably missing to link with the library
>
>                  ITKAlgorithms
>
>Note that
>
>     itkWatershedMiniPipelineProgressCommand.cxx
>
>is actually compiled and packaged in to that library,
>(It is one of those rare ITK classes that are not templated)
>
>
>Please make sure that you add this library to your
>CMakeLists.txt file.
>
>
>-----
>
>
>It is entirely possible to wrap ITK code into C functions.
>
>This is exactly what we did for implementing the VolView
>plugins available in InsightApplications, and works fine.
>
>As you said,
>this will be a very common approach for integrating
>ITK functionalities into other projects.
>
>
>
>   Regards,
>
>
>     Luis
>
>
>---------------------------------------
>Feng Ma wrote:
>>Hi,
>>
>>  I am working on a project which call ITK watershed library inside a C 
>>function. To do this, I wrote a C++ wrapper which uses 
>>itk::ResampleImageFilter, itk::CurvatureAnisotropicDiffusionImageFilter, 
>>itk::GradientMagnitudeImageFilter and itk::WatershedImageFilter. Basically 
>>the same operation as we saw in the watershed example. Then the main C 
>>function will call this c++ wrapper. The wrapper is compiled using c++ 
>>compiler (g++). The main function is compiled using c compiler (gcc). The 
>>project is finally linked using g++. I do declare the wrapper function to 
>>be extern "C" in order to be able to call from a C function.
>>
>>  I use cmake to construct the project. However, I got the following error 
>>during the final link stage, related to watershed image filter:
>>
>>/r2net/r2/fma/ITK/lib/InsightToolkit/libITKWrapLib.a(itkWatershed3DSeg.o): 
>>In function `itk::WatershedImageFilter<itk::Image<float, 3>  
>> >::WatershedImageFilter(void)':
>>itkWatershed3DSeg.o(.itk::WatershedImageFilter<itk::Image<float, 3>  
>> >::gnu.linkonce.t.(void)+0x5a7): undefined reference to 
>>`itk::WatershedMiniPipelineProgressCommand type_info function'
>>itkWatershed3DSeg.o(.itk::WatershedImageFilter<itk::Image<float, 3>  
>> >::gnu.linkonce.t.(void)+0x5d9): undefined reference to 
>>`itk::WatershedMiniPipelineProgressCommand type_info function'
>>itkWatershed3DSeg.o(.itk::WatershedImageFilter<itk::Image<float, 3>  
>> >::gnu.linkonce.t.(void)+0x65b): undefined reference to 
>>`itk::WatershedMiniPipelineProgressCommand virtual table'
>>/r2net/r2/fma/ITK/lib/InsightToolkit/libITKWrapLib.a(itkWatershed3DSeg.o): 
>>In function `itk::WatershedImageFilter<itk::Image<float, 3>  
>> >::GenerateData(void)':
>>itkWatershed3DSeg.o(.itk::WatershedImageFilter<itk::Image<float, 3>  
>> >::gnu.linkonce.t.GenerateData(void)+0x1ab): undefined reference to 
>>`itk::WatershedMiniPipelineProgressCommand type_info function'
>>collect2: ld returned 1 exit status
>>
>>   If I commented out parts related to watershed, there is no error.
>>
>>   If I remove the extern "C" for the wrapper, also change the caller to 
>>be a c++ file and compile the calling function using c++, I got the same 
>>error.
>>
>>   If I build the same application inside InsightApplication tree, without 
>>using wrappers, I don't have any error.
>>
>>  Any thoughts on this? I am thinking my situation may be a common 
>>situation for some users. We want to call ITK functions from some legacy 
>>code which is c-compatible. To use ITK library, one easy way is to write a 
>>c wrapper.
>>
>>  If needed, I will post my code here. I am using CVS version of ITK. I 
>>could not remember the exact date I checked out, but should be after 1.2 
>>release. My "cvs status" shows:
>>===================================================================
>>File: itkWatershedMiniPipelineProgressCommand.cxx       Status: Needs 
>>Patch
>>
>>   Working revision:    1.2
>>   Repository revision: 1.3     
>>/cvsroot/Insight/Insight/Code/Algorithms/itkWatershedMiniPipelineProgressCommand.cxx,v
>>
>>   Sticky Tag:          (none)
>>   Sticky Date:         (none)
>>   Sticky Options:      (none)
>>
>>  Is this a known problem and fixed in cvs already?
>>
>>  Thanks a lot.
>>
>>-Feng
>>
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>
>
>
>
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