cmake_minimum_required(VERSION 3.16.3 FATAL_ERROR)
project(ITKGPUFiniteDifference)

if(NOT ITK_SOURCE_DIR)
  find_package(ITK REQUIRED)
  list(APPEND CMAKE_MODULE_PATH ${ITK_CMAKE_DIR})
  set(ITK_USE_GPU
      ON
      CACHE BOOL "Enable OpenCL GPU support." FORCE)
  include(itkOpenCL)
endif()

if(ITK_USE_GPU)
  set(ITKGPUFiniteDifference_SYSTEM_INCLUDE_DIRS ${OPENCL_INCLUDE_DIRS})
  set(ITKGPUFiniteDifference_SYSTEM_LIBRARY_DIRS ${OPENCL_LIBRARIES})
  set(ITKGPUFiniteDifference_LIBRARIES ITKGPUFiniteDifference)
endif()

if(NOT ITK_SOURCE_DIR)
  include(ITKModuleExternal)
else()
  itk_module_impl()
endif()