# CheckVTKVersion

VTKExamples/Cxx/Utilities/CheckVTKVersion

### Description

This example demonstrates how to check the VTK version with vtkVersion.

### Code

CheckVTKVersion.cxx

    #include <vtkVersion.h>

    int main(int, char *[])
    {
      std::cout << vtkVersion::GetVTKSourceVersion() << std::endl;
      std::cout << vtkVersion::GetVTKMajorVersion() << std::endl;
      std::cout << vtkVersion::GetVTKMinorVersion() << std::endl;

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

    project(CheckVTKVersion)

    find_package(VTK COMPONENTS
      vtkCommonCore QUIET)
    if (NOT VTK_FOUND)
      message("Skipping CheckVTKVersion: ${VTK_NOT_FOUND_MESSAGE}")
      return ()
    endif()
    message (STATUS "VTK_VERSION: ${VTK_VERSION}")
    if (VTK_VERSION VERSION_LESS "8.90.0")
      # old system
      include(${VTK_USE_FILE})
      add_executable(CheckVTKVersion MACOSX_BUNDLE CheckVTKVersion.cxx )
      target_link_libraries(CheckVTKVersion PRIVATE ${VTK_LIBRARIES})
    else ()
      # include all components
      add_executable(CheckVTKVersion MACOSX_BUNDLE CheckVTKVersion.cxx )
      target_link_libraries(CheckVTKVersion PRIVATE ${VTK_LIBRARIES})
      # vtk_module_autoinit is needed
      vtk_module_autoinit(
        TARGETS CheckVTKVersion
        MODULES ${VTK_LIBRARIES}
        )
    endif ()

### Download and Build CheckVTKVersion

Click here to download CheckVTKVersion and its CMakeLists.txt file. Once the tarball CheckVTKVersion.tar has been downloaded and extracted,

    cd CheckVTKVersion/build

If VTK is installed:

    cmake ..

If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:

    cmake -DVTK_DIR:PATH=/home/me/vtk_build ..

Build the project:

    make

and run it:

    ./CheckVTKVersion

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.