[eigen] Linker error after updating from -betaX to 2.0.0

[Benjamin Schindler <bschindler@xxxxxxxxxxxxxxx>]

Hi

I just updated to 2.0.0, and my code won't compile anymore, because of
this:

cd /home/benjamin/software/build/viewer-build/libsph && /usr/bin/cmake -E cmake_link_script CMakeFiles/sph.dir/link.txt --verbose=1                     
/usr/bin/c++  -fPIC   -Wno-deprecated -g   -shared -Wl,-soname,libsph.so -o libsph.so CMakeFiles/sph.dir/Filters/vtkMergeVectorFilter.cpp.o CMakeFiles/sph.dir/Filters/vtkInterpolateAllFilter.cpp.o CMakeFiles/sph.dir/Filters/vtkCompositeDataToUnstructuredGridFilter.cpp.o CMakeFiles/sph.dir/Filters/vtkVortexCorelineExtractor.cpp.o CMakeFiles/sph.dir/Filters/vtkStreamLineGenerator.cpp.o CMakeFiles/sph.dir/Filters/vtkThreadedFilter.cpp.o CMakeFiles/sph.dir/Filters/vtkSPHResampler.cpp.o CMakeFiles/sph.dir/Filters/CandidateSelector.cpp.o CMakeFiles/sph.dir/Filters/TestCandidateSelector.cpp.o CMakeFiles/sph.dir/Filters/vtkSPHSurfaceGenerator.cpp.o CMakeFiles/sph.dir/Utils/SPHSampler.cpp.o CMakeFiles/sph.dir/Utils/CacheEntry.cpp.o CMakeFiles/sph.dir/Utils/vtkPointLocatorDerived.cpp.o CMakeFiles/sph.dir/Utils/vtkTemporalDataSetInterpolator.cpp.o CMakeFiles/sph.dir/Sources/vtkDamBreakSource.cpp.o CMakeFiles/sph.dir/Sources/vtkVortexRopeSource.cpp.o CMakeFiles/sph.dir/PredictorCorrector/PredictorCorrector.cpp.o CMakeFiles/sph.dir/PredictorCorrector/AbstractPredictorCorrector.cpp.o CMakeFiles/sph.dir/PredictorCorrector/AbstractParallelVectorsField.cpp.o CMakeFiles/sph.dir/PredictorCorrector/AbstractTemporalParallelVectorsField.cpp.o CMakeFiles/sph.dir/PredictorCorrector/LevyMethod.cpp.o CMakeFiles/sph.dir/PredictorCorrector/SujudiHaimes.cpp.o CMakeFiles/sph.dir/PredictorCorrector/FuchsMethod.cpp.o CMakeFiles/sph.dir/PredictorCorrector/WeinkaufMethod.cpp.o CMakeFiles/sph.dir/PredictorCorrector/FuchsMethodNoAcceleration.cpp.o CMakeFiles/sph.dir/PredictorCorrector/WeinkaufMethodNoAcceleration.cpp.o CMakeFiles/sph.dir/hdf5/vtkH5PartReader.cxx.o CMakeFiles/sph.dir/hdf5/vtkH5PartWriter.cxx.o CMakeFiles/sph.dir/hdf5/vtkH5SPHReader.cxx.o CMakeFiles/sph.dir/hdf5/vtkXMLParticleWriter.cxx.o CMakeFiles/sph.dir/hdf5/FileSeriesFinder.cpp.o CMakeFiles/sph.dir/Sources/vtkDamBreakHdf5Source.cpp.o -L/home/benjamin/env/lib/vtk-5.2 -lvtkIO -lvtkFiltering -lvtkGraphics /home/benjamin/env/lib/libhdf5.so /home/benjamin/env/lib/libH5Part.a -lvtkDICOMParser -lvtkNetCDF -lvtkmetaio -lvtksqlite -lvtkpng -lvtktiff -lvtkzlib -lvtkjpeg -lvtkexpat -lvtkFiltering -lvtkCommon -lvtksys -lpthread -ldl -lm -lvtkverdict -Wl,-rpath,/home/benjamin/env/lib/vtk-5.2:/home/benjamin/env/lib     
CMakeFiles/sph.dir/Filters/vtkSPHSurfaceGenerator.cpp.o: In function `Eigen::Scaling(float)':                                                           
/usr/lib/gcc/i686-pc-linux-gnu/4.3.3/include/g++-v4/exception:59: multiple definition of `Eigen::Scaling(float)'                                        
CMakeFiles/sph.dir/Filters/vtkVortexCorelineExtractor.cpp.o:/home/benjamin/env/include/vtk-5.2/vtkOStreamWrapper.h:132: first defined here              
CMakeFiles/sph.dir/Filters/vtkSPHSurfaceGenerator.cpp.o: In function `Eigen::Scaling(double)':                                                          
/home/benjamin/env/include/eigen2/Eigen/src/Geometry/Scaling.h:125: multiple definition of `Eigen::Scaling(double)'                                     
CMakeFiles/sph.dir/Filters/vtkVortexCorelineExtractor.cpp.o:/home/benjamin/env/include/eigen2/Eigen/src/Geometry/Scaling.h:125: first defined here      
CMakeFiles/sph.dir/PredictorCorrector/PredictorCorrector.cpp.o: In function `Eigen::Scaling(float)':                                                    
/usr/lib/gcc/i686-pc-linux-gnu/4.3.3/include/g++-v4/exception:59: multiple definition of `Eigen::Scaling(float)'                                        
<-- snip - many more of those -->
/usr/lib/gcc/i686-pc-linux-gnu/4.3.3/../../../../i686-pc-linux-gnu/bin/ld: warning: creating a DT_TEXTREL in object.
collect2: ld returned 1 exit status
make[2]: *** [libsph/libsph.so] Error 1

I checked the file vtkOStreamWrapper.h and there is no Scaling definition there I would be able to spot. 
The people of the irc-C++-channel guessed wrong include guards, but there was none I could spot

Any ideas what's causing this? 

Thanks
Benjmain