# Duplicated includes?

**URL:** <https://discourse.slicer.org/t/duplicated-includes/1862>\
**Category:** Development\
**Created:** [January 17, 2018, 2:55pm UTC](https://discourse.slicer.org/t/duplicated-includes/1862 "2018-01-17T14:55:31Z")\
**Posts on this page:** 12\
**Page:** 1

<div class="post-metadata">

**Author:** ![ihnorton](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ihnorton/32/9_2.png) [@ihnorton](https://discourse.slicer.org/u/ihnorton)\
**Post date:** [January 17, 2018, 2:55pm UTC](https://discourse.slicer.org/t/duplicated-includes/1862/1 "2018-01-17T14:55:31Z")

</div>

Is there a reason we are setting the include path to both source _and the build directory_ for VTK and ITK? This means I have nearly 500 include directories for a single compiler invocation (macOS 10.12, SDK 10.13; Qt 5.9.3 from Qt Company package, etc.)

```auto
cat /tmp/one-clang-invocation | sed $'s/ /\\\n/g' | grep "\-I" | wc -l
     493

```

where `/tmp/one-clang-invocation` is the first line in `Slicer-build/compile_commands.json` (with `CMAKE_EXPORT_COMPILE_COMMANDS` enabled, and [this PR](https://github.com/Slicer/Slicer/pull/869)):

```auto
  "command": "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -DITKFactoryRegistration_EXPORTS -DITK_IO_FACTORY_REGISTER_MANAGER -DPYTHONQT_USE_RELEASE_PYTHON_FALLBACK -DvtkRenderingContext2D_AUTOINIT=\"1(vtkRenderingContextOpenGL2)\" -DvtkRenderingCore_AUTOINIT=\"3(vtkInteractionStyle,vtkRenderingFreeType,vtkRenderingOpenGL2)\" -DvtkRenderingOpenGL2_AUTOINIT=\"1(vtkRenderingGL2PSOpenGL2)\" -DvtkRenderingVolume_AUTOINIT=\"1(vtkRenderingVolumeOpenGL2)\" -ILibs/ITKFactoryRegistration/ITKIOFactoryRegistration -I/opt/bld/s5nj/ITKv4/Modules/IO/DCMTK/include -I/opt/bld/s5nj/ITKv4/Modules/IO/MINC/include -I/opt/bld/s5nj/ITKv4/Modules/Remote/MGHIO/include -I/opt/bld/s5nj/ITKv4/Modules/IO/TransformMatlab/include -I/opt/bld/s5nj/ITKv4/Modules/IO/TransformInsightLegacy/include -I/opt/bld/s5nj/ITKv4/Modules/IO/TransformHDF5/include -I/opt/bld/s5nj/ITKv4/Modules/IO/GIPL/include -I/opt/bld/s5nj/ITKv4/Modules/IO/NRRD/include -I/opt/bld/s5nj/ITKv4/Modules/IO/NIFTI/include -I/opt/bld/s5nj/ITKv4/Modules/IO/MRC/include -I/opt/bld/s5nj/ITKv4/Modules/IO/Meta/include -I/opt/bld/s5nj/ITKv4/Modules/IO/BioRad/include -I/opt/bld/s5nj/ITKv4/Modules/IO/Stimulate/include -I/opt/bld/s5nj/ITKv4/Modules/IO/VTK/include -I/opt/bld/s5nj/ITKv4/Modules/IO/TIFF/include -I/opt/bld/s5nj/ITKv4/Modules/IO/PNG/include -I/opt/bld/s5nj/ITKv4/Modules/IO/LSM/include -I/opt/bld/s5nj/ITKv4/Modules/IO/BMP/include -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/Expat/src/expat -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/Expat/src/expat -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/GDCM/src/gdcm/Source/DataStructureAndEncodingDefinition -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/GDCM/src/gdcm/Source/MessageExchangeDefinition -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/GDCM/src/gdcm/Source/InformationObjectDefinition -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/GDCM/src/gdcm/Source/Common -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/GDCM/src/gdcm/Source/DataDictionary -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/GDCM/src/gdcm/Source/MediaStorageAndFileFormat -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/GDCM/src/gdcm/Source/Common -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/GDCM -I/opt/bld/s5nj/ITKv4/Modules/IO/GDCM/include -I/opt/bld/s5nj/ITKv4/Modules/IO/JPEG/include -I/opt/bld/s5nj/ITKv4/Modules/IO/TransformFactory/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/Path/include -I/opt/bld/s5nj/zlib-install/include -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/ZLIB/src -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/MetaIO/src/MetaIO/src -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/MetaIO/src/MetaIO/src -I/opt/bld/s5nj/ITKv4/Modules/Core/SpatialObjects/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/ImageCompose/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/ImageStatistics/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/ImageIntensity/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/ImageFilterBase/include -I/opt/bld/s5nj/ITKv4/Modules/Core/Transform/include -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/Netlib -I/opt/bld/s5nj/ITKv4/Modules/Numerics/Statistics/include -I/opt/bld/s5nj/ITKv4/Modules/Core/ImageAdaptors/include -I/opt/bld/s5nj/ITKv4/Modules/Core/ImageFunction/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/ImageGrid/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/DisplacementField/include -I/opt/bld/s5nj/ITKv4/Modules/IO/TransformBase/include -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/VNL/src/vxl/core -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/VNL/src/vxl/vcl -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/VNL/src/vxl/v3p/netlib -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/VNL/src/vxl/core -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/VNL/src/vxl/vcl -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/VNL/src/vxl/v3p/netlib -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/VNLInstantiation/include -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/KWSys/src -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/KWIML/src -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/KWIML/src -I/opt/bld/s5nj/ITKv4/Modules/Core/Common/include -I/opt/bld/s5nj/ITKv4-build/Modules/Core/Common -I/opt/bld/s5nj/ITKv4/Modules/IO/ImageBase/include -I/opt/bld/s5nj/ITKv4-build/Modules/IO/ImageBase -I/opt/bld/s5nj/VTKv9-build/Filters/Extraction -I/opt/bld/s5nj/VTKv9/Filters/Extraction -I/opt/bld/s5nj/VTKv9-build/Common/Core -I/opt/bld/s5nj/VTKv9/Common/Core -I/opt/bld/s5nj/VTKv9-build/Utilities/KWIML -I/opt/bld/s5nj/VTKv9/Utilities/KWIML -I/opt/bld/s5nj/VTKv9-build/Utilities/KWSys -I/opt/bld/s5nj/VTKv9/Utilities/KWSys -I/opt/bld/s5nj/VTKv9-build/ThirdParty/utf8 -I/opt/bld/s5nj/VTKv9/ThirdParty/utf8 -I/opt/bld/s5nj/VTKv9-build/Common/DataModel -I/opt/bld/s5nj/VTKv9/Common/DataModel -I/opt/bld/s5nj/VTKv9-build/Common/Math -I/opt/bld/s5nj/VTKv9/Common/Math -I/opt/bld/s5nj/VTKv9-build/Common/Misc -I/opt/bld/s5nj/VTKv9/Common/Misc -I/opt/bld/s5nj/VTKv9-build/Common/System -I/opt/bld/s5nj/VTKv9/Common/System -I/opt/bld/s5nj/VTKv9-build/Common/Transforms -I/opt/bld/s5nj/VTKv9/Common/Transforms -I/opt/bld/s5nj/VTKv9-build/Common/ExecutionModel -I/opt/bld/s5nj/VTKv9/Common/ExecutionModel -I/opt/bld/s5nj/VTKv9-build/Filters/Core -I/opt/bld/s5nj/VTKv9/Filters/Core -I/opt/bld/s5nj/VTKv9-build/Filters/General -I/opt/bld/s5nj/VTKv9/Filters/General -I/opt/bld/s5nj/VTKv9-build/Common/ComputationalGeometry -I/opt/bld/s5nj/VTKv9/Common/ComputationalGeometry -I/opt/bld/s5nj/VTKv9-build/Filters/Statistics -I/opt/bld/s5nj/VTKv9/Filters/Statistics -I/opt/bld/s5nj/VTKv9-build/Imaging/Fourier -I/opt/bld/s5nj/VTKv9/Imaging/Fourier -I/opt/bld/s5nj/VTKv9-build/Imaging/Core -I/opt/bld/s5nj/VTKv9/Imaging/Core -I/opt/bld/s5nj/VTKv9-build/ThirdParty/alglib -I/opt/bld/s5nj/VTKv9/ThirdParty/alglib -I/opt/bld/s5nj/VTKv9-build/Filters/FlowPaths -I/opt/bld/s5nj/VTKv9/Filters/FlowPaths -I/opt/bld/s5nj/VTKv9-build/Filters/Geometry -I/opt/bld/s5nj/VTKv9/Filters/Geometry -I/opt/bld/s5nj/VTKv9-build/Filters/Sources -I/opt/bld/s5nj/VTKv9/Filters/Sources -I/opt/bld/s5nj/VTKv9-build/IO/Core -I/opt/bld/s5nj/VTKv9/IO/Core -I/opt/bld/s5nj/VTKv9/ThirdParty/lz4/vtklz4/lib -I/opt/bld/s5nj/VTKv9-build/ThirdParty/lz4/vtklz4 -I/opt/bld/s5nj/VTKv9-build/ThirdParty/lz4 -I/opt/bld/s5nj/VTKv9/ThirdParty/lz4 -I/opt/bld/s5nj/VTKv9-build/ThirdParty/zlib -I/opt/bld/s5nj/VTKv9/ThirdParty/zlib -I/opt/bld/s5nj/VTKv9-build/GUISupport/QtOpenGL -I/opt/bld/s5nj/VTKv9/GUISupport/QtOpenGL -I/opt/bld/s5nj/VTKv9-build/GUISupport/Qt -I/opt/bld/s5nj/VTKv9/GUISupport/Qt -I/opt/bld/s5nj/VTKv9-build/Interaction/Style -I/opt/bld/s5nj/VTKv9/Interaction/Style -I/opt/bld/s5nj/VTKv9-build/Rendering/Core -I/opt/bld/s5nj/VTKv9/Rendering/Core -I/opt/bld/s5nj/VTKv9-build/Common/Color -I/opt/bld/s5nj/VTKv9/Common/Color -I/opt/bld/s5nj/VTKv9-build/Rendering/OpenGL2 -I/opt/bld/s5nj/VTKv9/Rendering/OpenGL2 -I/opt/bld/s5nj/VTKv9-build/ThirdParty/glew -I/opt/bld/s5nj/VTKv9/ThirdParty/glew -I/opt/bld/s5nj/VTKv9-build/GUISupport/QtSQL -I/opt/bld/s5nj/VTKv9/GUISupport/QtSQL -I/opt/bld/s5nj/VTKv9-build/IO/SQL -I/opt/bld/s5nj/VTKv9/IO/SQL -I/opt/bld/s5nj/VTKv9-build/ThirdParty/sqlite -I/opt/bld/s5nj/VTKv9/ThirdParty/sqlite -I/opt/bld/s5nj/VTKv9-build/IO/Export -I/opt/bld/s5nj/VTKv9/IO/Export -I/opt/bld/s5nj/VTKv9-build/IO/Image -I/opt/bld/s5nj/VTKv9/IO/Image -I/opt/bld/s5nj/VTKv9-build/Utilities/DICOMParser -I/opt/bld/s5nj/VTKv9/Utilities/DICOMParser -I/opt/bld/s5nj/VTKv9-build/Utilities/MetaIO/vtkmetaio -I/opt/bld/s5nj/VTKv9-build/Utilities/MetaIO -I/opt/bld/s5nj/VTKv9/Utilities/MetaIO -I/opt/bld/s5nj/VTKv9-build/ThirdParty/jpeg -I/opt/bld/s5nj/VTKv9/ThirdParty/jpeg -I/opt/bld/s5nj/VTKv9-build/ThirdParty/png -I/opt/bld/s5nj/VTKv9/ThirdParty/png -I/opt/bld/s5nj/VTKv9-build/ThirdParty/tiff/vtktiff/libtiff -I/opt/bld/s5nj/VTKv9-build/ThirdParty/tiff -I/opt/bld/s5nj/VTKv9/ThirdParty/tiff -I/opt/bld/s5nj/VTKv9-build/Rendering/Context2D -I/opt/bld/s5nj/VTKv9/Rendering/Context2D -I/opt/bld/s5nj/VTKv9-build/Rendering/FreeType -I/opt/bld/s5nj/VTKv9/Rendering/FreeType -I/opt/bld/s5nj/VTKv9-build/ThirdParty/freetype -I/opt/bld/s5nj/VTKv9/ThirdParty/freetype -I/opt/bld/s5nj/VTKv9-build/Rendering/GL2PSOpenGL2 -I/opt/bld/s5nj/VTKv9/Rendering/GL2PSOpenGL2 -I/opt/bld/s5nj/VTKv9-build/ThirdParty/gl2ps -I/opt/bld/s5nj/VTKv9/ThirdParty/gl2ps -I/opt/bld/s5nj/VTKv9/ThirdParty/libharu/vtklibharu/include -I/opt/bld/s5nj/VTKv9-build/ThirdParty/libharu/vtklibharu/include -I/opt/bld/s5nj/VTKv9-build/ThirdParty/libharu -I/opt/bld/s5nj/VTKv9/ThirdParty/libharu -I/opt/bld/s5nj/VTKv9-build/IO/Legacy -I/opt/bld/s5nj/VTKv9/IO/Legacy -I/opt/bld/s5nj/VTKv9-build/IO/PLY -I/opt/bld/s5nj/VTKv9/IO/PLY -I/opt/bld/s5nj/VTKv9-build/IO/XML -I/opt/bld/s5nj/VTKv9/IO/XML -I/opt/bld/s5nj/VTKv9-build/IO/XMLParser -I/opt/bld/s5nj/VTKv9/IO/XMLParser -I/opt/bld/s5nj/VTKv9-build/ThirdParty/expat -I/opt/bld/s5nj/VTKv9/ThirdParty/expat -I/opt/bld/s5nj/VTKv9-build/Imaging/Math -I/opt/bld/s5nj/VTKv9/Imaging/Math -I/opt/bld/s5nj/VTKv9-build/Imaging/Morphological -I/opt/bld/s5nj/VTKv9/Imaging/Morphological -I/opt/bld/s5nj/VTKv9-build/Imaging/General -I/opt/bld/s5nj/VTKv9/Imaging/General -I/opt/bld/s5nj/VTKv9-build/Imaging/Sources -I/opt/bld/s5nj/VTKv9/Imaging/Sources -I/opt/bld/s5nj/VTKv9-build/Imaging/Statistics -I/opt/bld/s5nj/VTKv9/Imaging/Statistics -I/opt/bld/s5nj/VTKv9-build/Imaging/Stencil -I/opt/bld/s5nj/VTKv9/Imaging/Stencil -I/opt/bld/s5nj/VTKv9-build/Interaction/Image -I/opt/bld/s5nj/VTKv9/Interaction/Image -I/opt/bld/s5nj/VTKv9-build/Imaging/Color -I/opt/bld/s5nj/VTKv9/Imaging/Color -I/opt/bld/s5nj/VTKv9-build/Interaction/Widgets -I/opt/bld/s5nj/VTKv9/Interaction/Widgets -I/opt/bld/s5nj/VTKv9-build/Filters/Hybrid -I/opt/bld/s5nj/VTKv9/Filters/Hybrid -I/opt/bld/s5nj/VTKv9-build/Filters/Modeling -I/opt/bld/s5nj/VTKv9/Filters/Modeling -I/opt/bld/s5nj/VTKv9-build/Imaging/Hybrid -I/opt/bld/s5nj/VTKv9/Imaging/Hybrid -I/opt/bld/s5nj/VTKv9-build/Rendering/Annotation -I/opt/bld/s5nj/VTKv9/Rendering/Annotation -I/opt/bld/s5nj/VTKv9-build/Rendering/Volume -I/opt/bld/s5nj/VTKv9/Rendering/Volume -I/opt/bld/s5nj/VTKv9-build/Rendering/ContextOpenGL2 -I/opt/bld/s5nj/VTKv9/Rendering/ContextOpenGL2 -I/opt/bld/s5nj/VTKv9-build/Rendering/Qt -I/opt/bld/s5nj/VTKv9/Rendering/Qt -I/opt/bld/s5nj/VTKv9-build/Filters/Texture -I/opt/bld/s5nj/VTKv9/Filters/Texture -I/opt/bld/s5nj/VTKv9-build/Rendering/Label -I/opt/bld/s5nj/VTKv9/Rendering/Label -I/opt/bld/s5nj/VTKv9-build/Rendering/VolumeOpenGL2 -I/opt/bld/s5nj/VTKv9/Rendering/VolumeOpenGL2 -I/opt/bld/s5nj/VTKv9-build/Testing/Rendering -I/opt/bld/s5nj/VTKv9/Testing/Rendering -I/opt/bld/s5nj/VTKv9-build/Testing/Core -I/opt/bld/s5nj/VTKv9/Testing/Core -I/opt/bld/s5nj/VTKv9-build/Views/Qt -I/opt/bld/s5nj/VTKv9/Views/Qt -I/opt/bld/s5nj/VTKv9-build/Infovis/Core -I/opt/bld/s5nj/VTKv9/Infovis/Core -I/opt/bld/s5nj/VTKv9-build/Views/Core -I/opt/bld/s5nj/VTKv9/Views/Core -I/opt/bld/s5nj/VTKv9-build/Views/Infovis -I/opt/bld/s5nj/VTKv9/Views/Infovis -I/opt/bld/s5nj/VTKv9-build/Charts/Core -I/opt/bld/s5nj/VTKv9/Charts/Core -I/opt/bld/s5nj/VTKv9-build/Filters/Imaging -I/opt/bld/s5nj/VTKv9/Filters/Imaging -I/opt/bld/s5nj/VTKv9-build/Infovis/Layout -I/opt/bld/s5nj/VTKv9/Infovis/Layout -I/opt/bld/s5nj/VTKv9-build/Wrapping/PythonCore -I/opt/bld/s5nj/VTKv9/Wrapping/PythonCore -I/opt/bld/s5nj/VTKv9-build/Utilities/Python -I/opt/bld/s5nj/VTKv9/Utilities/Python -I/opt/bld/s5nj/python-install/include/python2.7 -I/opt/bld/s5nj/VTKv9-build/Utilities/PythonInterpreter -I/opt/bld/s5nj/VTKv9/Utilities/PythonInterpreter -I/opt/bld/s5nj/VTKv9-build/Wrapping/Tools -I/opt/bld/s5nj/VTKv9/Wrapping/Tools -I/opt/bld/s5nj/CTK/Libs/Core -I/opt/bld/s5nj/CTK-build/CTK-build/Libs/Core -I/opt/bld/s5nj/CTK-build/CTK-build -I/opt/bld/s5nj/CTK/Libs/Widgets -I/opt/bld/s5nj/CTK-build/CTK-build/Libs/Widgets -I/opt/bld/s5nj/CTK/Libs/DICOM/Core -I/opt/bld/s5nj/CTK-build/CTK-build/Libs/DICOM/Core -I/opt/bld/s5nj/DCMTK-build/config/include -I/opt/bld/s5nj/DCMTK/ofstd/include -I/opt/bld/s5nj/DCMTK/oflog/include -I/opt/bld/s5nj/DCMTK/dcmdata/include -I/opt/bld/s5nj/DCMTK/dcmimgle/include -I/opt/bld/s5nj/DCMTK/dcmimage/include -I/opt/bld/s5nj/DCMTK/dcmjpeg/include -I/opt/bld/s5nj/DCMTK/dcmjpls/include -I/opt/bld/s5nj/DCMTK/dcmtls/include -I/opt/bld/s5nj/DCMTK/dcmnet/include -I/opt/bld/s5nj/DCMTK/dcmsr/include -I/opt/bld/s5nj/DCMTK/dcmsign/include -I/opt/bld/s5nj/DCMTK/dcmwlm/include -I/opt/bld/s5nj/DCMTK/dcmqrdb/include -I/opt/bld/s5nj/DCMTK/dcmpstat/include -I/opt/bld/s5nj/DCMTK/dcmrt/include -I/opt/bld/s5nj/DCMTK/dcmiod/include -I/opt/bld/s5nj/DCMTK/dcmfg/include -I/opt/bld/s5nj/DCMTK/dcmseg/include -I/opt/bld/s5nj/DCMTK/dcmtract/include -I/opt/bld/s5nj/DCMTK/dcmpmap/include -I/opt/bld/s5nj/CTK/Libs/DICOM/Widgets -I/opt/bld/s5nj/CTK-build/CTK-build/Libs/DICOM/Widgets -I/opt/bld/s5nj/CTK/Libs/ImageProcessing/ITK/Core -I/opt/bld/s5nj/CTK-build/CTK-build/Libs/ImageProcessing/ITK/Core -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/DoubleConversion/src/double-conversion -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/DoubleConversion/src/double-conversion -I/opt/bld/s5nj/ITKv4/Modules/Core/FiniteDifference/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/CurvatureFlow/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/AnisotropicSmoothing/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/LabelMap/include -I/opt/bld/s5nj/ITKv4/Modules/Core/Mesh/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/Thresholding/include -I/opt/bld/s5nj/ITKv4/Modules/Segmentation/ConnectedComponents/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/MathematicalMorphology/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/BinaryMathematicalMorphology/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/ImageLabel/include -I/opt/bld/s5nj/ITKv4/Modules/Numerics/NarrowBand/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/DistanceMap/include -I/opt/bld/s5nj/ITKv4/Modules/Core/QuadEdgeMesh/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/FastMarching/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/ImageCompare/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/Smoothing/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/ImageGradient/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/ImageSources/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/ImageFeature/include -I/opt/bld/s5nj/ITKv4/Modules/Numerics/Optimizers/include -I/opt/bld/s5nj/ITKv4/Modules/Segmentation/SignedDistanceFunction/include -I/opt/bld/s5nj/ITKv4/Modules/Segmentation/LevelSets/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/AntiAlias/include -I/opt/bld/s5nj/ITKv4/Modules/Numerics/Polynomials/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/BiasCorrection/include -I/opt/bld/s5nj/ITKv4/Modules/Segmentation/BioCell/include -I/opt/bld/s5nj/ITKv4/Modules/Segmentation/Classifiers/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/Colormap/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/FFT/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/Convolution/include -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/DICOMParser/src/DICOMParser -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/DICOMParser/src/DICOMParser -I/opt/bld/s5nj/ITKv4/Modules/Filtering/Deconvolution/include -I/opt/bld/s5nj/ITKv4/Modules/Segmentation/DeformableMesh/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/Denoising/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/DiffusionTensorImage/include -I/opt/bld/s5nj/ITKv4/Modules/Numerics/Eigen/include -I/opt/bld/s5nj/ITKv4/Modules/IO/XML/include -I/opt/bld/s5nj/ITKv4/Modules/IO/SpatialObjects/include -I/opt/bld/s5nj/ITKv4/Modules/Registration/Common/include -I/opt/bld/s5nj/ITKv4/Modules/Numerics/FEM/include -I/opt/bld/s5nj/ITKv4/Modules/Registration/PDEDeformable/include -I/opt/bld/s5nj/ITKv4/Modules/Registration/FEM/include -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/NIFTI/src/nifti/niftilib -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/NIFTI/src/nifti/znzlib -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/GIFTI/src/gifticlib -I/opt/bld/s5nj/ITKv4/Modules/Core/GPUCommon/include -I/opt/bld/s5nj/ITKv4/Modules/Core/GPUFiniteDifference/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/GPUAnisotropicSmoothing/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/GPUImageFilterBase/include -I/opt/bld/s5nj/ITKv4/Modules/Registration/GPUCommon/include -I/opt/bld/s5nj/ITKv4/Modules/Registration/GPUPDEDeformable/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/GPUSmoothing/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/GPUThresholding/include -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/HDF5/src -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/HDF5/src -I/opt/bld/s5nj/ITKv4/Modules/IO/CSV/include -I/opt/bld/s5nj/ITKv4/Modules/IO/IPL/include -I/opt/bld/s5nj/ITKv4/Modules/IO/GE/include -I/opt/bld/s5nj/ITKv4/Modules/IO/HDF5/include -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/JPEG/src -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/JPEG/src -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/TIFF/src -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/TIFF/src/itktiff -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/TIFF/src -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/MINC -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/MINC -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/MINC/src/libminc -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/MINC/src/libminc/libcommon -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/MINC/src/libminc/libsrc2 -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/MINC/src/libminc/volume_io/Include -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/HDF5/src/itkhdf5 -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/HDF5/src/itkhdf5 -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/HDF5/src/itkhdf5/src -I/opt/bld/s5nj/ITKv4/Modules/IO/Mesh/include -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/NrrdIO/src/NrrdIO -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/NrrdIO/src/NrrdIO -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/PNG/src -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/PNG/src -I/opt/bld/s5nj/ITKv4/Modules/IO/RAW/include -I/opt/bld/s5nj/ITKv4/Modules/IO/Siemens/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/ImageFusion/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/ImageNoise/include -I/opt/bld/s5nj/ITKv4/Modules/Segmentation/KLMRegionGrowing/include -I/opt/bld/s5nj/ITKv4/Modules/Segmentation/LabelVoting/include -I/opt/bld/s5nj/ITKv4/Modules/Segmentation/LevelSetsv4/include -I/opt/bld/s5nj/ITKv4/Modules/Segmentation/MarkovRandomFieldsClassifiers/include -I/opt/bld/s5nj/ITKv4/Modules/Numerics/Optimizersv4/include -I/opt/bld/s5nj/ITKv4/Modules/Registration/Metricsv4/include -I/opt/bld/s5nj/ITKv4/Modules/Numerics/NeuralNetworks/include -I/opt/bld/s5nj/ITKv4-build/Modules/ThirdParty/OpenJPEG/src/openjpeg -I/opt/bld/s5nj/ITKv4/Modules/ThirdParty/OpenJPEG/src/openjpeg -I/opt/bld/s5nj/ITKv4/Modules/Filtering/QuadEdgeMeshFiltering/include -I/opt/bld/s5nj/ITKv4/Modules/Segmentation/RegionGrowing/include -I/opt/bld/s5nj/ITKv4/Modules/Registration/RegistrationMethodsv4/include -I/opt/bld/s5nj/ITKv4/Modules/Filtering/SpatialFunction/include -I/opt/bld/s5nj/ITKv4/Modules/Bridge/VTK/include -I/opt/bld/s5nj/ITKv4/Modules/Segmentation/Voronoi/include -I/opt/bld/s5nj/ITKv4/Modules/Segmentation/Watersheds/include -I/opt/bld/s5nj/ITKv4/Modules/Nonunit/Review/include -I/opt/bld/s5nj/ITKv4/Modules/Core/TestKernel/include -I/opt/bld/s5nj/ITKv4/Modules/Video/Core/include -I/opt/bld/s5nj/ITKv4/Modules/Video/Filtering/include -I/opt/bld/s5nj/ITKv4/Modules/Video/IO/include -I/opt/bld/s5nj/ITKv4/Modules/Bridge/VtkGlue/include -I/opt/bld/s5nj/CTK/Libs/Scripting/Python/Core -I/opt/bld/s5nj/CTK-build/CTK-build/Libs/Scripting/Python/Core -I/opt/bld/s5nj/CTK-build/CMakeExternals/Install/include/PythonQt -I/opt/bld/s5nj/CTK/Libs/Scripting/Python/Widgets -I/opt/bld/s5nj/CTK-build/CTK-build/Libs/Scripting/Python/Widgets -I/opt/bld/s5nj/CTK/Libs/Visualization/VTK/Core -I/opt/bld/s5nj/CTK-build/CTK-build/Libs/Visualization/VTK/Core -I/opt/bld/s5nj/VTKv9-build/Domains/Chemistry -I/opt/bld/s5nj/VTKv9/Domains/Chemistry -I/opt/bld/s5nj/VTKv9-build/Domains/ChemistryOpenGL2 -I/opt/bld/s5nj/VTKv9/Domains/ChemistryOpenGL2 -I/opt/bld/s5nj/VTKv9-build/Parallel/Core -I/opt/bld/s5nj/VTKv9/Parallel/Core -I/opt/bld/s5nj/VTKv9-build/Filters/AMR -I/opt/bld/s5nj/VTKv9/Filters/AMR -I/opt/bld/s5nj/VTKv9-build/Filters/Generic -I/opt/bld/s5nj/VTKv9/Filters/Generic -I/opt/bld/s5nj/VTKv9-build/Filters/HyperTree -I/opt/bld/s5nj/VTKv9/Filters/HyperTree -I/opt/bld/s5nj/VTKv9-build/Filters/Parallel -I/opt/bld/s5nj/VTKv9/Filters/Parallel -I/opt/bld/s5nj/VTKv9-build/Filters/ParallelImaging -I/opt/bld/s5nj/VTKv9/Filters/ParallelImaging -I/opt/bld/s5nj/VTKv9-build/Filters/Points -I/opt/bld/s5nj/VTKv9/Filters/Points -I/opt/bld/s5nj/VTKv9-build/Filters/Programmable -I/opt/bld/s5nj/VTKv9/Filters/Programmable -I/opt/bld/s5nj/VTKv9-build/Filters/Python -I/opt/bld/s5nj/VTKv9/Filters/Python -I/opt/bld/s5nj/VTKv9-build/Filters/SMP -I/opt/bld/s5nj/VTKv9/Filters/SMP -I/opt/bld/s5nj/VTKv9-build/Filters/Selection -I/opt/bld/s5nj/VTKv9/Filters/Selection -I/opt/bld/s5nj/VTKv9-build/Filters/Topology -I/opt/bld/s5nj/VTKv9/Filters/Topology -I/opt/bld/s5nj/VTKv9-build/ThirdParty/verdict -I/opt/bld/s5nj/VTKv9/ThirdParty/verdict -I/opt/bld/s5nj/VTKv9-build/Filters/Verdict -I/opt/bld/s5nj/VTKv9/Filters/Verdict -I/opt/bld/s5nj/VTKv9/ThirdParty/libproj4/vtklibproj4 -I/opt/bld/s5nj/VTKv9-build/ThirdParty/libproj4/vtklibproj4 -I/opt/bld/s5nj/VTKv9-build/ThirdParty/libproj4 -I/opt/bld/s5nj/VTKv9/ThirdParty/libproj4 -I/opt/bld/s5nj/VTKv9-build/Geovis/Core -I/opt/bld/s5nj/VTKv9/Geovis/Core -I/opt/bld/s5nj/VTKv9-build/ThirdParty/hdf5/vtkhdf5 -I/opt/bld/s5nj/VTKv9/ThirdParty/hdf5/vtkhdf5/hl/src -I/opt/bld/s5nj/VTKv9/ThirdParty/hdf5/vtkhdf5/src -I/opt/bld/s5nj/VTKv9-build/ThirdParty/hdf5 -I/opt/bld/s5nj/VTKv9/ThirdParty/hdf5 -I/opt/bld/s5nj/VTKv9-build/IO/AMR -I/opt/bld/s5nj/VTKv9/IO/AMR -I/opt/bld/s5nj/VTKv9-build/IO/EnSight -I/opt/bld/s5nj/VTKv9/IO/EnSight -I/opt/bld/s5nj/VTKv9/ThirdParty/netcdf/vtknetcdf/include -I/opt/bld/s5nj/VTKv9-build/ThirdParty/netcdf/vtknetcdf -I/opt/bld/s5nj/VTKv9-build/ThirdParty/netcdf -I/opt/bld/s5nj/VTKv9/ThirdParty/netcdf -I/opt/bld/s5nj/VTKv9-build/ThirdParty/exodusII -I/opt/bld/s5nj/VTKv9/ThirdParty/exodusII -I/opt/bld/s5nj/VTKv9-build/IO/Exodus -I/opt/bld/s5nj/VTKv9/IO/Exodus -I/opt/bld/s5nj/VTKv9-build/IO/ExportOpenGL2 -I/opt/bld/s5nj/VTKv9/IO/ExportOpenGL2 -I/opt/bld/s5nj/VTKv9-build/IO/Geometry -I/opt/bld/s5nj/VTKv9/IO/Geometry -I/opt/bld/s5nj/VTKv9-build/IO/Import -I/opt/bld/s5nj/VTKv9/IO/Import -I/opt/bld/s5nj/VTKv9-build/ThirdParty/libxml2/vtklibxml2 -I/opt/bld/s5nj/VTKv9-build/ThirdParty/libxml2 -I/opt/bld/s5nj/VTKv9/ThirdParty/libxml2 -I/opt/bld/s5nj/VTKv9-build/IO/Infovis -I/opt/bld/s5nj/VTKv9/IO/Infovis -I/opt/bld/s5nj/VTKv9-build/IO/LSDyna -I/opt/bld/s5nj/VTKv9/IO/LSDyna -I/opt/bld/s5nj/VTKv9-build/IO/MINC -I/opt/bld/s5nj/VTKv9/IO/MINC -I/opt/bld/s5nj/VTKv9-build/ThirdParty/oggtheora -I/opt/bld/s5nj/VTKv9/ThirdParty/oggtheora -I/opt/bld/s5nj/VTKv9-build/IO/Movie -I/opt/bld/s5nj/VTKv9/IO/Movie -I/opt/bld/s5nj/VTKv9-build/ThirdParty/netcdfcpp -I/opt/bld/s5nj/VTKv9/ThirdParty/netcdfcpp -I/opt/bld/s5nj/VTKv9-build/IO/NetCDF -I/opt/bld/s5nj/VTKv9/IO/NetCDF -I/opt/bld/s5nj/VTKv9-build/ThirdParty/jsoncpp -I/opt/bld/s5nj/VTKv9/ThirdParty/jsoncpp -I/opt/bld/s5nj/VTKv9-build/IO/Parallel -I/opt/bld/s5nj/VTKv9/IO/Parallel -I/opt/bld/s5nj/VTKv9-build/IO/ParallelXML -I/opt/bld/s5nj/VTKv9/IO/ParallelXML -I/opt/bld/s5nj/VTKv9-build/IO/TecplotTable -I/opt/bld/s5nj/VTKv9/IO/TecplotTable -I/opt/bld/s5nj/VTKv9-build/IO/Video -I/opt/bld/s5nj/VTKv9/IO/Video -I/opt/bld/s5nj/VTKv9-build/Rendering/Image -I/opt/bld/s5nj/VTKv9/Rendering/Image -I/opt/bld/s5nj/VTKv9-build/Rendering/LOD -I/opt/bld/s5nj/VTKv9/Rendering/LOD -I/opt/bld/s5nj/VTKv9-build/Views/Context2D -I/opt/bld/s5nj/VTKv9/Views/Context2D -I/opt/bld/s5nj/CTK/Libs/Visualization/VTK/Widgets -I/opt/bld/s5nj/CTK-build/CTK-build/Libs/Visualization/VTK/Widgets -I/opt/bld/s5nj/CTK/Libs/QtTesting -I/opt/bld/s5nj/CTK-build/CTK-build/Libs/QtTesting -I/opt/bld/s5nj/CTK-build/QtTesting -I/opt/bld/s5nj/CTK-build/QtTesting-build -I/opt/bld/s5nj/CTK/Libs/Testing -I/opt/bld/s5nj/CTK-build/CTK-build/Libs/Testing -I/opt/bld/s5nj/teem-build/include -I/Users/inorton/git/slcr/s5/CMake -I/Users/inorton/git/slcr/s5 -I. -I/Users/inorton/git/slcr/s5/Libs/ITKFactoryRegistration -ILibs/ITKFactoryRegistration -g -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk -mmacosx-version-min=10.9 -fPIC -std=c++11 -o Libs/ITKFactoryRegistration/CMakeFiles/ITKFactoryRegistration.dir/itkFactoryRegistration.cxx.o -c /Users/inorton/git/slcr/s5/Libs/ITKFactoryRegistration/itkFactoryRegistration.cxx",

```

---

<div class="post-metadata">

**Author:** ![jcfr](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jcfr/32/17825_2.png) [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Post date:** [January 17, 2018, 3:09pm UTC](https://discourse.slicer.org/t/duplicated-includes/1862/2 "2018-01-17T15:09:19Z")

</div>

> [@ihnorton](#):
>
> Is there a reason we are setting the include path to both source and the build directory for VTK and ITK?

Yes. This ensure that the generated header files associated with each project can be included. Example of generated file is the export header.

It is true we could generate all files in a common directory and reduce the number of includes.

---

<div class="post-metadata">

**Author:** ![adamrankin](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/adamrankin/32/155_2.png) [@adamrankin](https://discourse.slicer.org/u/adamrankin)\
**Post date:** [January 17, 2018, 3:25pm UTC](https://discourse.slicer.org/t/duplicated-includes/1862/3 "2018-01-17T15:25:21Z")

</div>

Given the Windows path length issues, this would be a greatly appreciated undertaking. Maybe even installing to a build folder (VTKv9-install, etc…)?

Edit: the undertaking is reducing the number of includes

---

<div class="post-metadata">

**Author:** ![jcfr](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jcfr/32/17825_2.png) [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Post date:** [January 17, 2018, 4:01pm UTC](https://discourse.slicer.org/t/duplicated-includes/1862/4 "2018-01-17T16:01:40Z")

</div>

> [@adamrankin](#):
>
> installing to a build folder

Few comments:

- I don’t think ITK (and VTK) support being used from an install tree (cc: @thewtex @fbudin69500 )

- installing the libraries would currently cause more headache to properly support macOS fixup (aka package generation)

---

<div class="post-metadata">

**Author:** ![thewtex](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/thewtex/32/32_2.png) [@thewtex](https://discourse.slicer.org/u/thewtex)\
**Post date:** [January 17, 2018, 4:24pm UTC](https://discourse.slicer.org/t/duplicated-includes/1862/5 "2018-01-17T16:24:53Z")

</div>

ITK and VTK support being used from an install tree with the caveat that ITK can only be extended with additional external modules from a build tree. Since I use this feature from Slicer extensions, it would be nice to keep it :-).

---

<div class="post-metadata">

**Author:** ![thewtex](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/thewtex/32/32_2.png) [@thewtex](https://discourse.slicer.org/u/thewtex)\
**Post date:** [January 17, 2018, 4:29pm UTC](https://discourse.slicer.org/t/duplicated-includes/1862/6 "2018-01-17T16:29:13Z")

</div>

> [@thewtex](#):
>
> Since I use this feature from Slicer extensions, it would be nice to keep it :-).

Then again, if the ITK build directory is also provided, with some the external module could still be built again ITK’s build tree and installed into the common install prefix. That assumes that there are not any packaging issues – @jcfr has the best perspective on how extensions are packaged.

---

<div class="post-metadata">

**Author:** ![ihnorton](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ihnorton/32/9_2.png) [@ihnorton](https://discourse.slicer.org/u/ihnorton)\
**Post date:** [January 17, 2018, 6:36pm UTC](https://discourse.slicer.org/t/duplicated-includes/1862/7 "2018-01-17T18:36:44Z")

</div>

Inspired by this discussion, here is a related change that I’ve wanted for a long time:

> <https://github.com/Slicer/Slicer/issues/870>
>
> \_This issue was created automatically from an original \[Mantis Issue\](https://ma…ntisarchive.slicer.org/view.php?id=870). Further discussion may take place here.\_

It needs some build system fixes, so I haven’t tried to build it yet 🙂 but spot-checks look correct, and it is completely scripted (runs on in ~1s) so it’s very easy to make tweaks and re-run.

The idea is that we would then need to pass only a single path, e.g. `/path/to/SuperBuild/VTKv9/` containing VTK source checked out in the subdirectory `vtk`.

---

<div class="post-metadata">

**Author:** ![ihnorton](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ihnorton/32/9_2.png) [@ihnorton](https://discourse.slicer.org/u/ihnorton)\
**Post date:** [January 17, 2018, 6:44pm UTC](https://discourse.slicer.org/t/duplicated-includes/1862/8 "2018-01-17T18:44:20Z")

</div>

Here is an example:

```auto
-#include <vtkAlgorithm.h>

```

becomes

```auto
+#include <vtk/Common/ExecutionModel/vtkAlgorithm.h>

```

And we would then use a single include specifier: `-I/path/to/SuperBuild/VTKv9/`, assuming VTK source is in `/path/to/SuperBuild/VTKv9/vtk` as noted above.

---

<div class="post-metadata">

**Author:** ![jcfr](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jcfr/32/17825_2.png) [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Post date:** [January 17, 2018, 6:55pm UTC](https://discourse.slicer.org/t/duplicated-includes/1862/9 "2018-01-17T18:55:19Z")

</div>

> [@ihnorton](#):
>
> The idea is that we would then need to pass only a single path, e.g. /path/to/SuperBuild/VTKv9/ containing VTK source checked out in the subdirectory vtk.

I like where this is going.

The challenge is that we still need to pass the same number of build directory for VTK. Currently the export header are generated in each sub directory.

To obtain the same reduction in number include directories, we could instead generate all export header in a single directory.

The following files would have be updated:

> <https://github.com/Slicer/VTK/blob/slicer-v9.0.0-2018-01-11-590b341/CMake/vtkModuleMacros.cmake#L759>

> <https://github.com/Slicer/VTK/blob/slicer-v9.0.0-2018-01-11-590b341/CMake/vtkModuleMacros.cmake#L195>

Similar changes could also be applied to Slicer and CTK libraries

---

<div class="post-metadata">

**Author:** ![ihnorton](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ihnorton/32/9_2.png) [@ihnorton](https://discourse.slicer.org/u/ihnorton)\
**Post date:** [January 17, 2018, 7:26pm UTC](https://discourse.slicer.org/t/duplicated-includes/1862/10 "2018-01-17T19:26:59Z")

</div>

Hmm, thinking about this a little bit more, the PR870 idea may be problematic because VTK itself doesn’t specify relative include paths internally. I guess we pass all subdirectory permutations to work around this (does every VTK client really do this?).

Assuming VTK doesn’t want to apply the same library-style path fix in PR870 😄…

…an alternative is that we copy all of the headers for VTK (and ITK) into a single directory in our build system. This requires no `#include` changes, just build system changes, and has the same effect of reducing the path specification to 1-2 (assuming we retarget the Export headers as @jcfr mentioned).

(side note: in this scenario the copy script would need to exclude `VTKv9/Examples/` because there are about 20 duplicate-named headers)

---

<div class="post-metadata">

**Author:** ![jcfr](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jcfr/32/17825_2.png) [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Post date:** [January 17, 2018, 7:54pm UTC](https://discourse.slicer.org/t/duplicated-includes/1862/11 "2018-01-17T19:54:11Z")

</div>

> [@ihnorton](#):
>
> we copy all of the headers for VTK (and ITK) into a single directory in our build system

Since VTK build system is being improved to fully leverage “modern CMake” and target properties, it will be difficult (if not already the case) to exclude the build directories from the target exported in `VTKConfig`.

Instead, it should be possible to add an option to VTK named asking the build system to copy all headers of enabled modules into a single directory at build time.

---

<div class="post-metadata">

**Author:** ![jcfr](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jcfr/32/17825_2.png) [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Post date:** [June 21, 2019, 7:00am UTC](https://discourse.slicer.org/t/duplicated-includes/1862/12 "2019-06-21T07:00:46Z")

</div>

To conclude, the associated pull request [PR#870](https://github.com/Slicer/Slicer/pull/870) has been abandoned.