if(CMAKE_CROSSCOMPILING
    AND NOT VTKCompileTools_FOUND
    AND NOT DEFINED CMAKE_CROSSCOMPILING_EMULATOR
    AND VTK_ENABLE_WRAPPING)
  # if CMAKE_CROSSCOMPILING is true and crosscompiling emulator is not available, we need
  # to import build-tools targets.
  find_package(VTKCompileTools REQUIRED)
endif()