CMakeLists.txt

# ----------------------------------------------------------------------------
#  Root CMake file for OpenCV
#
#    From the off-tree build directory, invoke:
#      $ cmake <PATH_TO_OPENCV_ROOT>
#
# ----------------------------------------------------------------------------

# Disable in-source builds to prevent source tree corruption.
if(" ${CMAKE_SOURCE_DIR}" STREQUAL " ${CMAKE_BINARY_DIR}")
  message(FATAL_ERROR "
FATAL: In-source builds are not allowed.
       You should create a separate directory for build files.
")
endif()


include(cmake/OpenCVMinDepVersions.cmake)

if(CMAKE_GENERATOR MATCHES Xcode AND XCODE_VERSION VERSION_GREATER 4.3)
  cmake_minimum_required(VERSION 3.0 FATAL_ERROR)
elseif(CMAKE_SYSTEM_NAME MATCHES WindowsPhone OR CMAKE_SYSTEM_NAME MATCHES WindowsStore)
  cmake_minimum_required(VERSION 3.1 FATAL_ERROR)
  #Required to resolve linker error issues due to incompatibility with CMake v3.0+ policies.
  #CMake fails to find _fseeko() which leads to subsequent linker error.
  #See details here: http://www.cmake.org/Wiki/CMake/Policies
  cmake_policy(VERSION 2.8)
else()
  cmake_minimum_required(VERSION "${MIN_VER_CMAKE}" FATAL_ERROR)
endif()

option(ENABLE_PIC "Generate position independent code (necessary for shared libraries)" TRUE)
set(CMAKE_POSITION_INDEPENDENT_CODE ${ENABLE_PIC})

set(OPENCV_MATHJAX_RELPATH "https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0" CACHE STRING "URI to a MathJax installation")

# Following block can break build in case of cross-compiling
# but CMAKE_CROSSCOMPILING variable will be set only on project(OpenCV) command
# so we will try to detect cross-compiling by the presence of CMAKE_TOOLCHAIN_FILE
if(NOT DEFINED CMAKE_INSTALL_PREFIX)
  if(NOT CMAKE_TOOLCHAIN_FILE)
    # it _must_ go before project(OpenCV) in order to work
    if(WIN32)
      set(CMAKE_INSTALL_PREFIX "${CMAKE_BINARY_DIR}/install" CACHE PATH "Installation Directory")
    else()
      set(CMAKE_INSTALL_PREFIX "/usr/local" CACHE PATH "Installation Directory")
    endif()
  else()
    #Android: set output folder to ${CMAKE_BINARY_DIR}
    set(LIBRARY_OUTPUT_PATH_ROOT ${CMAKE_BINARY_DIR} CACHE PATH "root for library output, set this to change where android libs are compiled to" )
    # any cross-compiling
    set(CMAKE_INSTALL_PREFIX "${CMAKE_BINARY_DIR}/install" CACHE PATH "Installation Directory")
  endif()
endif()

if(CMAKE_SYSTEM_NAME MATCHES WindowsPhone OR CMAKE_SYSTEM_NAME MATCHES WindowsStore)
  set(WINRT TRUE)
endif()

if(WINRT)
  add_definitions(-DWINRT -DNO_GETENV)

  # Making definitions available to other configurations and
  # to filter dependency restrictions at compile time.
  if(CMAKE_SYSTEM_NAME MATCHES WindowsPhone)
    set(WINRT_PHONE TRUE)
    add_definitions(-DWINRT_PHONE)
  elseif(CMAKE_SYSTEM_NAME MATCHES WindowsStore)
    set(WINRT_STORE TRUE)
    add_definitions(-DWINRT_STORE)
  endif()

  if(CMAKE_SYSTEM_VERSION MATCHES 10)
    set(WINRT_10 TRUE)
    add_definitions(-DWINRT_10)
  elseif(CMAKE_SYSTEM_VERSION MATCHES 8.1)
    set(WINRT_8_1 TRUE)
    add_definitions(-DWINRT_8_1)
  elseif(CMAKE_SYSTEM_VERSION MATCHES 8.0)
    set(WINRT_8_0 TRUE)
    add_definitions(-DWINRT_8_0)
  endif()
endif()

if(POLICY CMP0026)
  cmake_policy(SET CMP0026 NEW)
endif()

if(POLICY CMP0042)
  cmake_policy(SET CMP0042 NEW)
endif()

if(POLICY CMP0046)
  cmake_policy(SET CMP0046 NEW)
endif()

if(POLICY CMP0051)
  cmake_policy(SET CMP0051 NEW)
endif()

if(POLICY CMP0054)  # CMake 3.1: Only interpret if() arguments as variables or keywords when unquoted.
  cmake_policy(SET CMP0054 NEW)
endif()

if(POLICY CMP0056)
  cmake_policy(SET CMP0056 NEW)
endif()

if(POLICY CMP0067)
  cmake_policy(SET CMP0067 NEW)
endif()

if(POLICY CMP0068)
  cmake_policy(SET CMP0068 NEW)  # CMake 3.9+: `RPATH` settings on macOS do not affect `install_name`.
endif()

include(cmake/OpenCVUtils.cmake)
ocv_cmake_reset_hooks()
ocv_check_environment_variables(OPENCV_CMAKE_HOOKS_DIR)
if(DEFINED OPENCV_CMAKE_HOOKS_DIR)
  foreach(__dir ${OPENCV_CMAKE_HOOKS_DIR})
    get_filename_component(__dir "${__dir}" ABSOLUTE)
    ocv_cmake_hook_register_dir(${__dir})
  endforeach()
endif()

ocv_cmake_hook(CMAKE_INIT)

# must go before the project command
ocv_update(CMAKE_CONFIGURATION_TYPES "Debug;Release" CACHE STRING "Configs" FORCE)
if(DEFINED CMAKE_BUILD_TYPE)
  set_property( CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS ${CMAKE_CONFIGURATION_TYPES} )
endif()

enable_testing()

project(OpenCV CXX C)

if(MSVC)
  set(CMAKE_USE_RELATIVE_PATHS ON CACHE INTERNAL "" FORCE)
endif()

ocv_cmake_eval(DEBUG_PRE ONCE)

ocv_clear_vars(OpenCVModules_TARGETS)

include(cmake/OpenCVDownload.cmake)

set(BUILD_LIST "" CACHE STRING "Build only listed modules (comma-separated, e.g. 'videoio,dnn,ts')")

# ----------------------------------------------------------------------------
# Break in case of popular CMake configuration mistakes
# ----------------------------------------------------------------------------
if(NOT CMAKE_SIZEOF_VOID_P GREATER 0)
  message(FATAL_ERROR "CMake fails to determine the bitness of the target platform.
  Please check your CMake and compiler installation. If you are cross-compiling then ensure that your CMake toolchain file correctly sets the compiler details.")
endif()

# ----------------------------------------------------------------------------
# Detect compiler and target platform architecture
# ----------------------------------------------------------------------------
include(cmake/OpenCVDetectCXXCompiler.cmake)
ocv_cmake_hook(POST_DETECT_COMPILER)

# Add these standard paths to the search paths for FIND_LIBRARY
# to find libraries from these locations first
if(UNIX AND NOT ANDROID)
  if(X86_64 OR CMAKE_SIZEOF_VOID_P EQUAL 8)
    if(EXISTS /lib64)
      list(APPEND CMAKE_LIBRARY_PATH /lib64)
    else()
      list(APPEND CMAKE_LIBRARY_PATH /lib)
    endif()
    if(EXISTS /usr/lib64)
      list(APPEND CMAKE_LIBRARY_PATH /usr/lib64)
    else()
      list(APPEND CMAKE_LIBRARY_PATH /usr/lib)
    endif()
  elseif(X86 OR CMAKE_SIZEOF_VOID_P EQUAL 4)
    if(EXISTS /lib32)
      list(APPEND CMAKE_LIBRARY_PATH /lib32)
    else()
      list(APPEND CMAKE_LIBRARY_PATH /lib)
    endif()
    if(EXISTS /usr/lib32)
      list(APPEND CMAKE_LIBRARY_PATH /usr/lib32)
    else()
      list(APPEND CMAKE_LIBRARY_PATH /usr/lib)
    endif()
  endif()
endif()

# Add these standard paths to the search paths for FIND_PATH
# to find include files from these locations first
if(MINGW)
  if(EXISTS /mingw)
      list(APPEND CMAKE_INCLUDE_PATH /mingw)
  endif()
  if(EXISTS /mingw32)
      list(APPEND CMAKE_INCLUDE_PATH /mingw32)
  endif()
  if(EXISTS /mingw64)
      list(APPEND CMAKE_INCLUDE_PATH /mingw64)
  endif()
endif()

# ----------------------------------------------------------------------------
# OpenCV cmake options
# ----------------------------------------------------------------------------

OCV_OPTION(OPENCV_ENABLE_NONFREE "Enable non-free algorithms" OFF)

# 3rd party libs
OCV_OPTION(OPENCV_FORCE_3RDPARTY_BUILD   "Force using 3rdparty code from source" OFF)
OCV_OPTION(BUILD_ZLIB               "Build zlib from source"             (WIN32 OR APPLE OR OPENCV_FORCE_3RDPARTY_BUILD) )
OCV_OPTION(BUILD_TIFF               "Build libtiff from source"          (WIN32 OR ANDROID OR APPLE OR OPENCV_FORCE_3RDPARTY_BUILD) )
OCV_OPTION(BUILD_JASPER             "Build libjasper from source"        (WIN32 OR ANDROID OR APPLE OR OPENCV_FORCE_3RDPARTY_BUILD) )
OCV_OPTION(BUILD_JPEG               "Build libjpeg from source"          (WIN32 OR ANDROID OR APPLE OR OPENCV_FORCE_3RDPARTY_BUILD) )
OCV_OPTION(BUILD_PNG                "Build libpng from source"           (WIN32 OR ANDROID OR APPLE OR OPENCV_FORCE_3RDPARTY_BUILD) )
OCV_OPTION(BUILD_OPENEXR            "Build openexr from source"          (((WIN32 OR ANDROID OR APPLE) AND NOT WINRT) OR OPENCV_FORCE_3RDPARTY_BUILD) )
OCV_OPTION(BUILD_WEBP               "Build WebP from source"             (((WIN32 OR ANDROID OR APPLE) AND NOT WINRT) OR OPENCV_FORCE_3RDPARTY_BUILD) )
OCV_OPTION(BUILD_TBB                "Download and build TBB from source" (ANDROID OR OPENCV_FORCE_3RDPARTY_BUILD) )
OCV_OPTION(BUILD_IPP_IW             "Build IPP IW from source"           (NOT MINGW OR OPENCV_FORCE_3RDPARTY_BUILD) IF (X86_64 OR X86) AND NOT WINRT )
OCV_OPTION(BUILD_ITT                "Build Intel ITT from source"
    (NOT MINGW OR OPENCV_FORCE_3RDPARTY_BUILD)
    IF (X86_64 OR X86 OR ARM OR AARCH64 OR PPC64 OR PPC64LE) AND NOT WINRT AND NOT APPLE_FRAMEWORK
)

# Optional 3rd party components
# ===================================================
OCV_OPTION(WITH_1394 "Include IEEE1394 support" ON
  VISIBLE_IF NOT ANDROID AND NOT IOS AND NOT WINRT
  VERIFY HAVE_DC1394_2)
OCV_OPTION(WITH_AVFOUNDATION "Use AVFoundation for Video I/O (iOS/Mac)" ON
  VISIBLE_IF APPLE
  VERIFY HAVE_AVFOUNDATION)
OCV_OPTION(WITH_CAP_IOS "Enable iOS video capture" ON
  VISIBLE_IF IOS
  VERIFY HAVE_CAP_IOS)
OCV_OPTION(WITH_CAROTENE "Use NVidia carotene acceleration library for ARM platform" ON
  VISIBLE_IF (ARM OR AARCH64) AND NOT IOS AND NOT (CMAKE_VERSION VERSION_LESS "2.8.11"))
OCV_OPTION(WITH_CPUFEATURES "Use cpufeatures Android library" ON
  VISIBLE_IF ANDROID
  VERIFY HAVE_CPUFEATURES)
OCV_OPTION(WITH_VTK "Include VTK library support (and build opencv_viz module eiher)" ON
  VISIBLE_IF NOT ANDROID AND NOT IOS AND NOT WINRT AND NOT CMAKE_CROSSCOMPILING
  VERIFY HAVE_VTK)
OCV_OPTION(WITH_CUDA "Include NVidia Cuda Runtime support" OFF
  VISIBLE_IF NOT IOS AND NOT WINRT
  VERIFY HAVE_CUDA)
OCV_OPTION(WITH_CUFFT "Include NVidia Cuda Fast Fourier Transform (FFT) library support" WITH_CUDA
  VISIBLE_IF WITH_CUDA
  VERIFY HAVE_CUFFT)
OCV_OPTION(WITH_CUBLAS "Include NVidia Cuda Basic Linear Algebra Subprograms (BLAS) library support" WITH_CUDA
  VISIBLE_IF WITH_CUDA
  VERIFY HAVE_CUBLAS)
OCV_OPTION(WITH_CUDNN "Include NVIDIA CUDA Deep Neural Network (cuDNN) library support" WITH_CUDA
  VISIBLE_IF WITH_CUDA
  VERIFY HAVE_CUDNN)
OCV_OPTION(WITH_NVCUVID "Include NVidia Video Decoding library support" WITH_CUDA
  VISIBLE_IF WITH_CUDA
  VERIFY HAVE_NVCUVID)
OCV_OPTION(WITH_EIGEN "Include Eigen2/Eigen3 support" (NOT CV_DISABLE_OPTIMIZATION AND NOT CMAKE_CROSSCOMPILING)
  VISIBLE_IF NOT WINRT
  VERIFY HAVE_EIGEN)
OCV_OPTION(WITH_FFMPEG "Include FFMPEG support" (NOT ANDROID)
  VISIBLE_IF NOT IOS AND NOT WINRT
  VERIFY HAVE_FFMPEG)
OCV_OPTION(WITH_GSTREAMER "Include Gstreamer support" ON
  VISIBLE_IF NOT ANDROID AND NOT IOS AND NOT WINRT
  VERIFY HAVE_GSTREAMER AND GSTREAMER_VERSION VERSION_GREATER "0.99")
OCV_OPTION(WITH_GTK "Include GTK support" ON
  VISIBLE_IF UNIX AND NOT APPLE AND NOT ANDROID
  VERIFY HAVE_GTK)
OCV_OPTION(WITH_GTK_2_X "Use GTK version 2" OFF
  VISIBLE_IF UNIX AND NOT APPLE AND NOT ANDROID
  VERIFY HAVE_GTK AND NOT HAVE_GTK3)
OCV_OPTION(WITH_IPP "Include Intel IPP support" (NOT MINGW AND NOT CV_DISABLE_OPTIMIZATION)
  VISIBLE_IF (X86_64 OR X86) AND NOT WINRT AND NOT IOS
  VERIFY HAVE_IPP)
OCV_OPTION(WITH_HALIDE "Include Halide support" OFF
  VISIBLE_IF TRUE
  VERIFY HAVE_HALIDE)
OCV_OPTION(WITH_VULKAN "Include Vulkan support" OFF
  VISIBLE_IF TRUE
  VERIFY HAVE_VULKAN)
OCV_OPTION(WITH_INF_ENGINE "Include Intel Inference Engine support" OFF
  VISIBLE_IF TRUE
  VERIFY INF_ENGINE_TARGET)
OCV_OPTION(WITH_JASPER "Include JPEG2K support" ON
  VISIBLE_IF NOT IOS
  VERIFY HAVE_JASPER)
OCV_OPTION(WITH_JPEG "Include JPEG support" ON
  VISIBLE_IF TRUE
  VERIFY HAVE_JPEG)
OCV_OPTION(WITH_WEBP "Include WebP support" ON
  VISIBLE_IF NOT WINRT
  VERIFY HAVE_WEBP)
OCV_OPTION(WITH_OPENEXR "Include ILM support via OpenEXR" BUILD_OPENEXR OR NOT CMAKE_CROSSCOMPILING
  VISIBLE_IF NOT APPLE_FRAMEWORK AND NOT WINRT
  VERIFY HAVE_OPENEXR)
OCV_OPTION(WITH_OPENGL "Include OpenGL support" OFF
  VISIBLE_IF NOT ANDROID AND NOT WINRT
  VERIFY HAVE_OPENGL)
OCV_OPTION(WITH_OPENVX "Include OpenVX support" OFF
  VISIBLE_IF TRUE
  VERIFY HAVE_OPENVX)
OCV_OPTION(WITH_OPENNI "Include OpenNI support" OFF
  VISIBLE_IF NOT ANDROID AND NOT IOS AND NOT WINRT
  VERIFY HAVE_OPENNI)
OCV_OPTION(WITH_OPENNI2 "Include OpenNI2 support" OFF
  VISIBLE_IF NOT ANDROID AND NOT IOS AND NOT WINRT
  VERIFY HAVE_OPENNI2)
OCV_OPTION(WITH_PNG "Include PNG support" ON
  VISIBLE_IF TRUE
  VERIFY HAVE_PNG)
OCV_OPTION(WITH_GDCM "Include DICOM support" OFF
  VISIBLE_IF TRUE
  VERIFY HAVE_GDCM)
OCV_OPTION(WITH_PVAPI "Include Prosilica GigE support" OFF
  VISIBLE_IF NOT ANDROID AND NOT IOS AND NOT WINRT
  VERIFY HAVE_PVAPI)
OCV_OPTION(WITH_ARAVIS "Include Aravis GigE support" OFF
  VISIBLE_IF NOT ANDROID AND NOT IOS AND NOT WINRT AND NOT WIN32
  VERIFY HAVE_ARAVIS_API)
OCV_OPTION(WITH_QT "Build with Qt Backend support" OFF
  VISIBLE_IF NOT ANDROID AND NOT IOS AND NOT WINRT
  VERIFY HAVE_QT)
OCV_OPTION(WITH_WIN32UI "Build with Win32 UI Backend support" ON
  VISIBLE_IF WIN32 AND NOT WINRT
  VERIFY HAVE_WIN32UI)
OCV_OPTION(WITH_TBB "Include Intel TBB support" OFF
  VISIBLE_IF NOT IOS AND NOT WINRT
  VERIFY HAVE_TBB)
OCV_OPTION(WITH_HPX "Include Ste||ar Group HPX support" OFF
  VISIBLE_IF TRUE
  VERIFY HAVE_HPX)
OCV_OPTION(WITH_OPENMP "Include OpenMP support" OFF
  VISIBLE_IF TRUE
  VERIFY HAVE_OPENMP)
OCV_OPTION(WITH_PTHREADS_PF "Use pthreads-based parallel_for" ON
  VISIBLE_IF NOT WIN32 OR MINGW
  VERIFY HAVE_PTHREADS_PF)
OCV_OPTION(WITH_TIFF "Include TIFF support" ON
  VISIBLE_IF NOT IOS
  VERIFY HAVE_TIFF)
OCV_OPTION(WITH_V4L "Include Video 4 Linux support" ON
  VISIBLE_IF UNIX AND NOT ANDROID AND NOT APPLE
  VERIFY HAVE_CAMV4L OR HAVE_CAMV4L2 OR HAVE_VIDEOIO)
OCV_OPTION(WITH_DSHOW "Build VideoIO with DirectShow support" ON
  VISIBLE_IF WIN32 AND NOT ARM AND NOT WINRT
  VERIFY HAVE_DSHOW)
OCV_OPTION(WITH_MSMF "Build VideoIO with Media Foundation support" NOT MINGW
  VISIBLE_IF WIN32
  VERIFY HAVE_MSMF)
OCV_OPTION(WITH_MSMF_DXVA "Enable hardware acceleration in Media Foundation backend" WITH_MSMF
  VISIBLE_IF WIN32
  VERIFY HAVE_MSMF_DXVA)
OCV_OPTION(WITH_XIMEA "Include XIMEA cameras support" OFF
  VISIBLE_IF NOT ANDROID AND NOT WINRT
  VERIFY HAVE_XIMEA)
OCV_OPTION(WITH_XINE "Include Xine support (GPL)" OFF
  VISIBLE_IF UNIX AND NOT APPLE AND NOT ANDROID
  VERIFY HAVE_XINE)
OCV_OPTION(WITH_CLP "Include Clp support (EPL)" OFF
  VISIBLE_IF TRUE
  VERIFY HAVE_CLP)
OCV_OPTION(WITH_OPENCL "Include OpenCL Runtime support" (NOT ANDROID AND NOT CV_DISABLE_OPTIMIZATION)
  VISIBLE_IF NOT IOS AND NOT WINRT
  VERIFY HAVE_OPENCL)
OCV_OPTION(WITH_OPENCL_SVM "Include OpenCL Shared Virtual Memory support" OFF
  VISIBLE_IF TRUE
  VERIFY HAVE_OPENCL_SVM) # experimental
OCV_OPTION(WITH_OPENCLAMDFFT "Include AMD OpenCL FFT library support" ON
  VISIBLE_IF NOT ANDROID AND NOT IOS AND NOT WINRT
  VERIFY HAVE_CLAMDFFT)
OCV_OPTION(WITH_OPENCLAMDBLAS "Include AMD OpenCL BLAS library support" ON
  VISIBLE_IF NOT ANDROID AND NOT IOS AND NOT WINRT
  VERIFY HAVE_CLAMDBLAS)
OCV_OPTION(WITH_DIRECTX "Include DirectX support" ON
  VISIBLE_IF WIN32 AND NOT WINRT
  VERIFY HAVE_DIRECTX)
OCV_OPTION(WITH_OPENCL_D3D11_NV "Include NVIDIA OpenCL D3D11 support" WITH_DIRECTX
  VISIBLE_IF WIN32 AND NOT WINRT
  VERIFY HAVE_OPENCL_D3D11_NV)
OCV_OPTION(WITH_LIBREALSENSE "Include Intel librealsense support" OFF
  VISIBLE_IF NOT WITH_INTELPERC
  VERIFY HAVE_LIBREALSENSE)
OCV_OPTION(WITH_VA "Include VA support" OFF
  VISIBLE_IF UNIX AND NOT ANDROID
  VERIFY HAVE_VA)
OCV_OPTION(WITH_VA_INTEL "Include Intel VA-API/OpenCL support" OFF
  VISIBLE_IF UNIX AND NOT ANDROID
  VERIFY HAVE_VA_INTEL)
OCV_OPTION(WITH_MFX "Include Intel Media SDK support" OFF
  VISIBLE_IF (UNIX AND NOT ANDROID) OR (WIN32 AND NOT WINRT AND NOT MINGW)
  VERIFY HAVE_MFX)
OCV_OPTION(WITH_GDAL "Include GDAL Support" OFF
  VISIBLE_IF NOT ANDROID AND NOT IOS AND NOT WINRT
  VERIFY HAVE_GDAL)
OCV_OPTION(WITH_GPHOTO2 "Include gPhoto2 library support" OFF
  VISIBLE_IF UNIX AND NOT ANDROID AND NOT IOS
  VERIFY HAVE_GPHOTO2)
OCV_OPTION(WITH_LAPACK "Include Lapack library support" (NOT CV_DISABLE_OPTIMIZATION)
  VISIBLE_IF NOT ANDROID AND NOT IOS
  VERIFY HAVE_LAPACK)
OCV_OPTION(WITH_ITT "Include Intel ITT support" ON
  VISIBLE_IF NOT APPLE_FRAMEWORK
  VERIFY HAVE_ITT)
OCV_OPTION(WITH_PROTOBUF "Enable libprotobuf" ON
  VISIBLE_IF TRUE
  VERIFY HAVE_PROTOBUF)
OCV_OPTION(WITH_IMGCODEC_HDR "Include HDR support" ON
  VISIBLE_IF TRUE
  VERIFY HAVE_IMGCODEC_HDR)
OCV_OPTION(WITH_IMGCODEC_SUNRASTER "Include SUNRASTER support" ON
  VISIBLE_IF TRUE
  VERIFY HAVE_IMGCODEC_SUNRASTER)
OCV_OPTION(WITH_IMGCODEC_PXM "Include PNM (PBM,PGM,PPM) and PAM formats support" ON
  VISIBLE_IF TRUE
  VERIFY HAVE_IMGCODEC_PXM)
OCV_OPTION(WITH_IMGCODEC_PFM "Include PFM formats support" ON
  VISIBLE_IF TRUE
  VERIFY HAVE_IMGCODEC_PFM)
OCV_OPTION(WITH_QUIRC "Include library QR-code decoding" ON
  VISIBLE_IF TRUE
  VERIFY HAVE_QUIRC)
OCV_OPTION(WITH_ANDROID_MEDIANDK "Use Android Media NDK for Video I/O (Android)" (ANDROID_NATIVE_API_LEVEL GREATER 20)
  VISIBLE_IF ANDROID
  VERIFY HAVE_ANDROID_MEDIANDK)

# OpenCV build components
# ===================================================
OCV_OPTION(BUILD_SHARED_LIBS        "Build shared libraries (.dll/.so) instead of static ones (.lib/.a)" NOT (ANDROID OR APPLE_FRAMEWORK) )
OCV_OPTION(BUILD_opencv_apps        "Build utility applications (used for example to train classifiers)" (NOT ANDROID AND NOT WINRT) IF (NOT APPLE_FRAMEWORK) )
OCV_OPTION(BUILD_opencv_js          "Build JavaScript bindings by Emscripten" OFF )
OCV_OPTION(BUILD_ANDROID_PROJECTS   "Build Android projects providing .apk files" ON  IF ANDROID )
OCV_OPTION(BUILD_ANDROID_EXAMPLES   "Build examples for Android platform"         ON  IF ANDROID )
OCV_OPTION(BUILD_DOCS               "Create build rules for OpenCV Documentation" OFF  IF (NOT WINRT AND NOT APPLE_FRAMEWORK))
OCV_OPTION(BUILD_EXAMPLES           "Build all examples"                          OFF )
OCV_OPTION(BUILD_PACKAGE            "Enables 'make package_source' command"       ON  IF NOT WINRT)
OCV_OPTION(BUILD_PERF_TESTS         "Build performance tests"                     NOT INSTALL_CREATE_DISTRIB  IF (NOT APPLE_FRAMEWORK) )
OCV_OPTION(BUILD_TESTS              "Build accuracy & regression tests"           NOT INSTALL_CREATE_DISTRIB  IF (NOT APPLE_FRAMEWORK) )
OCV_OPTION(BUILD_WITH_DEBUG_INFO    "Include debug info into release binaries ('OFF' means default settings)" OFF )
OCV_OPTION(BUILD_WITH_STATIC_CRT    "Enables use of statically linked CRT for statically linked OpenCV" ON IF MSVC )
OCV_OPTION(BUILD_WITH_DYNAMIC_IPP   "Enables dynamic linking of IPP (only for standalone IPP)" OFF )
OCV_OPTION(BUILD_FAT_JAVA_LIB       "Create Java wrapper exporting all functions of OpenCV library (requires static build of OpenCV modules)" ANDROID IF NOT BUILD_SHARED_LIBS)
OCV_OPTION(BUILD_ANDROID_SERVICE    "Build OpenCV Manager for Google Play" OFF IF ANDROID )
OCV_OPTION(BUILD_CUDA_STUBS         "Build CUDA modules stubs when no CUDA SDK" OFF  IF (NOT APPLE_FRAMEWORK) )
OCV_OPTION(BUILD_JAVA               "Enable Java support"                         (ANDROID OR NOT CMAKE_CROSSCOMPILING)  IF (ANDROID OR (NOT APPLE_FRAMEWORK AND NOT WINRT)) )

# OpenCV installation options
# ===================================================
OCV_OPTION(INSTALL_CREATE_DISTRIB   "Change install rules to build the distribution package" OFF )
OCV_OPTION(INSTALL_C_EXAMPLES       "Install C examples"        OFF )
OCV_OPTION(INSTALL_PYTHON_EXAMPLES  "Install Python examples"   OFF )
OCV_OPTION(INSTALL_ANDROID_EXAMPLES "Install Android examples"  OFF IF ANDROID )
OCV_OPTION(INSTALL_TO_MANGLED_PATHS "Enables mangled install paths, that help with side by side installs." OFF IF (UNIX AND NOT ANDROID AND NOT APPLE_FRAMEWORK AND BUILD_SHARED_LIBS) )
OCV_OPTION(INSTALL_TESTS            "Install accuracy and performance test binaries and test data" OFF)

# OpenCV build options
# ===================================================
OCV_OPTION(ENABLE_CCACHE              "Use ccache"                                               (UNIX AND NOT IOS AND (CMAKE_GENERATOR MATCHES "Makefile" OR CMAKE_GENERATOR MATCHES "Ninja")) )
OCV_OPTION(ENABLE_PRECOMPILED_HEADERS "Use precompiled headers"                                  ON IF (MSVC OR (NOT IOS AND NOT CMAKE_CROSSCOMPILING) ) )
OCV_OPTION(ENABLE_SOLUTION_FOLDERS    "Solution folder in Visual Studio or in other IDEs"        (MSVC_IDE OR CMAKE_GENERATOR MATCHES Xcode) )
OCV_OPTION(ENABLE_PROFILING           "Enable profiling in the GCC compiler (Add flags: -g -pg)" OFF  IF CV_GCC )
OCV_OPTION(ENABLE_COVERAGE            "Enable coverage collection with  GCov"                    OFF  IF CV_GCC )
OCV_OPTION(OPENCV_ENABLE_MEMORY_SANITIZER "Better support for memory/address sanitizers"         OFF)
OCV_OPTION(ENABLE_OMIT_FRAME_POINTER  "Enable -fomit-frame-pointer for GCC"                      ON   IF CV_GCC )
OCV_OPTION(ENABLE_POWERPC             "Enable PowerPC for GCC"                                   ON   IF (CV_GCC AND CMAKE_SYSTEM_PROCESSOR MATCHES powerpc.*) )
OCV_OPTION(ENABLE_FAST_MATH           "Enable compiler options for fast math optimizations on FP computations (not recommended)" OFF)
if(NOT IOS AND (NOT ANDROID OR OPENCV_ANDROID_USE_LEGACY_FLAGS))  # Use CPU_BASELINE instead
OCV_OPTION(ENABLE_NEON                "Enable NEON instructions"                                 (NEON OR ANDROID_ARM_NEON OR AARCH64) IF (CV_GCC OR CV_CLANG) AND (ARM OR AARCH64 OR IOS) )
OCV_OPTION(ENABLE_VFPV3               "Enable VFPv3-D32 instructions"                            OFF  IF (CV_GCC OR CV_CLANG) AND (ARM OR AARCH64 OR IOS) )
endif()
OCV_OPTION(ENABLE_NOISY_WARNINGS      "Show all warnings even if they are too noisy"             OFF )
OCV_OPTION(OPENCV_WARNINGS_ARE_ERRORS "Treat warnings as errors"                                 OFF )
OCV_OPTION(ANDROID_EXAMPLES_WITH_LIBS "Build binaries of Android examples with native libraries" OFF  IF ANDROID )
OCV_OPTION(ENABLE_IMPL_COLLECTION     "Collect implementation data on function call"             OFF )
OCV_OPTION(ENABLE_INSTRUMENTATION     "Instrument functions to collect calls trace and performance" OFF )
OCV_OPTION(ENABLE_GNU_STL_DEBUG       "Enable GNU STL Debug mode (defines _GLIBCXX_DEBUG)"       OFF IF ((NOT CMAKE_VERSION VERSION_LESS "2.8.11") AND CV_GCC) )
OCV_OPTION(ENABLE_BUILD_HARDENING     "Enable hardening of the resulting binaries (against security attacks, detects memory corruption, etc)" OFF)
OCV_OPTION(ENABLE_LTO                 "Enable Link Time Optimization" OFF IF CV_GCC OR MSVC)
OCV_OPTION(ENABLE_THIN_LTO            "Enable Thin LTO" OFF IF CV_CLANG)
OCV_OPTION(GENERATE_ABI_DESCRIPTOR    "Generate XML file for abi_compliance_checker tool" OFF IF UNIX)
OCV_OPTION(OPENCV_GENERATE_PKGCONFIG  "Generate .pc file for pkg-config build tool (deprecated)" OFF)
OCV_OPTION(CV_ENABLE_INTRINSICS       "Use intrinsic-based optimized code" ON )
OCV_OPTION(CV_DISABLE_OPTIMIZATION    "Disable explicit optimized code (dispatched code/intrinsics/loop unrolling/etc)" OFF )
OCV_OPTION(CV_TRACE                   "Enable OpenCV code trace" ON)
OCV_OPTION(OPENCV_GENERATE_SETUPVARS  "Generate setup_vars* scripts" ON IF (NOT ANDROID AND NOT APPLE_FRAMEWORK) )
OCV_OPTION(ENABLE_CONFIG_VERIFICATION "Fail build if actual configuration doesn't match requested (WITH_XXX != HAVE_XXX)" OFF)

OCV_OPTION(ENABLE_PYLINT              "Add target with Pylint checks"                            (BUILD_DOCS OR BUILD_EXAMPLES) IF (NOT CMAKE_CROSSCOMPILING AND NOT APPLE_FRAMEWORK) )
OCV_OPTION(ENABLE_FLAKE8              "Add target with Python flake8 checker"                    (BUILD_DOCS OR BUILD_EXAMPLES) IF (NOT CMAKE_CROSSCOMPILING AND NOT APPLE_FRAMEWORK) )

if(ENABLE_IMPL_COLLECTION)
  add_definitions(-DCV_COLLECT_IMPL_DATA)
endif()


# ----------------------------------------------------------------------------
#  Get actual OpenCV version number from sources
# ----------------------------------------------------------------------------
include(cmake/OpenCVVersion.cmake)

ocv_cmake_hook(POST_OPTIONS)

# ----------------------------------------------------------------------------
#  Build & install layouts
# ----------------------------------------------------------------------------

# Save libs and executables in the same place
set(EXECUTABLE_OUTPUT_PATH "${CMAKE_BINARY_DIR}/bin" CACHE PATH "Output directory for applications")

if(ANDROID)
  if(ANDROID_ABI MATCHES "NEON")
    set(ENABLE_NEON ON)
  endif()
  if(ANDROID_ABI MATCHES "VFPV3")
    set(ENABLE_VFPV3 ON)
  endif()
endif()

if(ANDROID OR WIN32)
  ocv_update(OPENCV_DOC_INSTALL_PATH doc)
endif()

if(WIN32 AND CMAKE_HOST_SYSTEM_NAME MATCHES Windows)
  if(DEFINED OpenCV_RUNTIME AND DEFINED OpenCV_ARCH)
    ocv_update(OpenCV_INSTALL_BINARIES_PREFIX "${OpenCV_ARCH}/${OpenCV_RUNTIME}/")
  else()
    message(STATUS "Can't detect runtime and/or arch")
    ocv_update(OpenCV_INSTALL_BINARIES_PREFIX "")
  endif()
elseif(ANDROID)
  ocv_update(OpenCV_INSTALL_BINARIES_PREFIX "sdk/native/")
else()
  ocv_update(OpenCV_INSTALL_BINARIES_PREFIX "")
endif()

if(ANDROID)
  ocv_update(OPENCV_SAMPLES_BIN_INSTALL_PATH "${OpenCV_INSTALL_BINARIES_PREFIX}samples/${ANDROID_NDK_ABI_NAME}")
else()
  ocv_update(OPENCV_SAMPLES_BIN_INSTALL_PATH "${OpenCV_INSTALL_BINARIES_PREFIX}samples")
endif()

if(ANDROID)
  ocv_update(OPENCV_BIN_INSTALL_PATH "${OpenCV_INSTALL_BINARIES_PREFIX}bin/${ANDROID_NDK_ABI_NAME}")
else()
  ocv_update(OPENCV_BIN_INSTALL_PATH "${OpenCV_INSTALL_BINARIES_PREFIX}bin")
endif()

if(NOT OPENCV_TEST_INSTALL_PATH)
  ocv_update(OPENCV_TEST_INSTALL_PATH "${OPENCV_BIN_INSTALL_PATH}")
endif()

if (OPENCV_TEST_DATA_PATH)
  get_filename_component(OPENCV_TEST_DATA_PATH ${OPENCV_TEST_DATA_PATH} ABSOLUTE)
endif()

if(ANDROID)
  ocv_update(OPENCV_TEST_DATA_INSTALL_PATH "sdk/etc/testdata")
elseif(WIN32)
  ocv_update(OPENCV_TEST_DATA_INSTALL_PATH "testdata")
endif()

if(ANDROID)
  set(LIBRARY_OUTPUT_PATH                "${OpenCV_BINARY_DIR}/lib/${ANDROID_NDK_ABI_NAME}")
  ocv_update(3P_LIBRARY_OUTPUT_PATH      "${OpenCV_BINARY_DIR}/3rdparty/lib/${ANDROID_NDK_ABI_NAME}")
  ocv_update(OPENCV_LIB_INSTALL_PATH     sdk/native/libs/${ANDROID_NDK_ABI_NAME})
  ocv_update(OPENCV_LIB_ARCHIVE_INSTALL_PATH sdk/native/staticlibs/${ANDROID_NDK_ABI_NAME})
  ocv_update(OPENCV_3P_LIB_INSTALL_PATH  sdk/native/3rdparty/libs/${ANDROID_NDK_ABI_NAME})
  ocv_update(OPENCV_CONFIG_INSTALL_PATH  sdk/native/jni)
  ocv_update(OPENCV_INCLUDE_INSTALL_PATH sdk/native/jni/include)
  ocv_update(OPENCV_SAMPLES_SRC_INSTALL_PATH samples/native)
  ocv_update(OPENCV_OTHER_INSTALL_PATH   sdk/etc)
  ocv_update(OPENCV_LICENSES_INSTALL_PATH "${OPENCV_OTHER_INSTALL_PATH}/licenses")
else()
  set(LIBRARY_OUTPUT_PATH                "${OpenCV_BINARY_DIR}/lib")
  ocv_update(3P_LIBRARY_OUTPUT_PATH      "${OpenCV_BINARY_DIR}/3rdparty/lib${LIB_SUFFIX}")

  if(WIN32 AND CMAKE_HOST_SYSTEM_NAME MATCHES Windows)
    if(OpenCV_STATIC)
      ocv_update(OPENCV_LIB_INSTALL_PATH   "${OpenCV_INSTALL_BINARIES_PREFIX}staticlib${LIB_SUFFIX}")
    else()
      ocv_update(OPENCV_LIB_INSTALL_PATH   "${OpenCV_INSTALL_BINARIES_PREFIX}lib${LIB_SUFFIX}")
    endif()
    ocv_update(OPENCV_3P_LIB_INSTALL_PATH  "${OpenCV_INSTALL_BINARIES_PREFIX}staticlib${LIB_SUFFIX}")
    ocv_update(OPENCV_SAMPLES_SRC_INSTALL_PATH    samples)
    ocv_update(OPENCV_JAR_INSTALL_PATH java)
    ocv_update(OPENCV_OTHER_INSTALL_PATH   etc)
    ocv_update(OPENCV_CONFIG_INSTALL_PATH  ".")
    ocv_update(OPENCV_INCLUDE_INSTALL_PATH "include")
    ocv_update(OPENCV_LICENSES_INSTALL_PATH "${OPENCV_OTHER_INSTALL_PATH}/licenses")
  else()
    # Note: layout differs from OpenCV 3.4
    include(GNUInstallDirs)
    ocv_update(OPENCV_INCLUDE_INSTALL_PATH       "${CMAKE_INSTALL_INCLUDEDIR}/opencv4")
    ocv_update(OPENCV_LIB_INSTALL_PATH           "${CMAKE_INSTALL_LIBDIR}")
    ocv_update(OPENCV_CONFIG_INSTALL_PATH        "${OPENCV_LIB_INSTALL_PATH}/cmake/opencv4")
    ocv_update(OPENCV_3P_LIB_INSTALL_PATH        "${OPENCV_LIB_INSTALL_PATH}/opencv4/3rdparty")
    ocv_update(OPENCV_SAMPLES_SRC_INSTALL_PATH   "${CMAKE_INSTALL_DATAROOTDIR}/opencv4/samples")
    ocv_update(OPENCV_DOC_INSTALL_PATH           "${CMAKE_INSTALL_DATAROOTDIR}/doc/opencv4")
    ocv_update(OPENCV_JAR_INSTALL_PATH           "${CMAKE_INSTALL_DATAROOTDIR}/java/opencv4")
    ocv_update(OPENCV_TEST_DATA_INSTALL_PATH     "${CMAKE_INSTALL_DATAROOTDIR}/opencv4/testdata")
    ocv_update(OPENCV_OTHER_INSTALL_PATH         "${CMAKE_INSTALL_DATAROOTDIR}/opencv4")
    ocv_update(OPENCV_LICENSES_INSTALL_PATH      "${CMAKE_INSTALL_DATAROOTDIR}/licenses/opencv4")
  endif()
  #ocv_update(OPENCV_PYTHON_INSTALL_PATH  "python")  # no default value, see https://github.com/opencv/opencv/issues/13202
endif()

ocv_update(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/${OPENCV_LIB_INSTALL_PATH}")
set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)

if(INSTALL_TO_MANGLED_PATHS)
  foreach(v
      OPENCV_INCLUDE_INSTALL_PATH
      # file names include version (.so/.dll): OPENCV_LIB_INSTALL_PATH
      OPENCV_CONFIG_INSTALL_PATH
      OPENCV_3P_LIB_INSTALL_PATH
      OPENCV_SAMPLES_SRC_INSTALL_PATH
      OPENCV_DOC_INSTALL_PATH
      # JAR file name includes version: OPENCV_JAR_INSTALL_PATH
      OPENCV_TEST_DATA_INSTALL_PATH
      OPENCV_OTHER_INSTALL_PATH
    )
    string(REGEX REPLACE "opencv[0-9]*" "opencv-${OPENCV_VERSION}" ${v} "${${v}}")
  endforeach()
endif()

if(ANDROID)
  ocv_update(OPENCV_JNI_INSTALL_PATH "${OPENCV_LIB_INSTALL_PATH}")
elseif(INSTALL_CREATE_DISTRIB)
  ocv_update(OPENCV_JNI_INSTALL_PATH "${OPENCV_JAR_INSTALL_PATH}/${OpenCV_ARCH}")
else()
  ocv_update(OPENCV_JNI_INSTALL_PATH "${OPENCV_JAR_INSTALL_PATH}")
endif()
ocv_update(OPENCV_JNI_BIN_INSTALL_PATH "${OPENCV_JNI_INSTALL_PATH}")

if(NOT OPENCV_LIB_ARCHIVE_INSTALL_PATH)
  set(OPENCV_LIB_ARCHIVE_INSTALL_PATH ${OPENCV_LIB_INSTALL_PATH})
endif()

if(WIN32)
  # Postfix of DLLs:
  set(OPENCV_DLLVERSION "${OPENCV_VERSION_MAJOR}${OPENCV_VERSION_MINOR}${OPENCV_VERSION_PATCH}")
  set(OPENCV_DEBUG_POSTFIX d)
else()
  # Postfix of so's:
  set(OPENCV_DLLVERSION "")
  set(OPENCV_DEBUG_POSTFIX "")
endif()

if(DEFINED CMAKE_DEBUG_POSTFIX)
  set(OPENCV_DEBUG_POSTFIX "${CMAKE_DEBUG_POSTFIX}")
endif()

if((INSTALL_CREATE_DISTRIB AND BUILD_SHARED_LIBS AND NOT DEFINED BUILD_opencv_world) OR APPLE_FRAMEWORK)
  set(BUILD_opencv_world ON CACHE INTERNAL "")
endif()

# ----------------------------------------------------------------------------
#  Path for build/platform -specific headers
# ----------------------------------------------------------------------------
ocv_update(OPENCV_CONFIG_FILE_INCLUDE_DIR "${CMAKE_BINARY_DIR}/" CACHE PATH "Where to create the platform-dependant cvconfig.h")
ocv_include_directories(${OPENCV_CONFIG_FILE_INCLUDE_DIR})

# ----------------------------------------------------------------------------
#  Path for additional modules
# ----------------------------------------------------------------------------
set(OPENCV_EXTRA_MODULES_PATH "" CACHE PATH "Where to look for additional OpenCV modules (can be ;-separated list of paths)")

# ----------------------------------------------------------------------------
#  Autodetect if we are in a GIT repository
# ----------------------------------------------------------------------------
find_host_package(Git QUIET)

if(NOT DEFINED OPENCV_VCSVERSION AND GIT_FOUND)
  ocv_git_describe(OPENCV_VCSVERSION "${OpenCV_SOURCE_DIR}")
elseif(NOT DEFINED OPENCV_VCSVERSION)
  # We don't have git:
  set(OPENCV_VCSVERSION "unknown")
endif()


# ----------------------------------------------------------------------------
# OpenCV compiler and linker options
# ----------------------------------------------------------------------------
# In case of Makefiles if the user does not setup CMAKE_BUILD_TYPE, assume it's Release:
if(CMAKE_GENERATOR MATCHES "Makefiles|Ninja" AND "${CMAKE_BUILD_TYPE}" STREQUAL "")
  set(CMAKE_BUILD_TYPE Release)
endif()

ocv_cmake_hook(POST_CMAKE_BUILD_OPTIONS)

# --- Python Support ---
if(NOT IOS)
  include(cmake/OpenCVDetectPython.cmake)
endif()

include(cmake/OpenCVCompilerOptions.cmake)

ocv_cmake_hook(POST_COMPILER_OPTIONS)

# ----------------------------------------------------------------------------
#       CHECK FOR SYSTEM LIBRARIES, OPTIONS, ETC..
# ----------------------------------------------------------------------------
if(UNIX)
  if(NOT APPLE_FRAMEWORK OR OPENCV_ENABLE_PKG_CONFIG)
    if(CMAKE_CROSSCOMPILING AND NOT DEFINED ENV{PKG_CONFIG_LIBDIR} AND NOT DEFINED ENV{PKG_CONFIG_SYSROOT_DIR}
        AND NOT OPENCV_ENABLE_PKG_CONFIG
    )
      if(NOT PkgConfig_FOUND)
        message(STATUS "OpenCV disables pkg-config to avoid using of host libraries. Consider using PKG_CONFIG_LIBDIR to specify target SYSROOT")
      elseif(OPENCV_SKIP_PKG_CONFIG_WARNING)
        message(WARNING "pkg-config is enabled in cross-compilation mode without defining of PKG_CONFIG_LIBDIR environment variable. This may lead to misconfigured host-based dependencies.")
      endif()
    elseif(OPENCV_DISABLE_PKG_CONFIG)
      if(PkgConfig_FOUND)
        message(WARNING "OPENCV_DISABLE_PKG_CONFIG flag has no effect")
      endif()
    else()
      find_package(PkgConfig QUIET)
    endif()
  endif()
  include(CheckFunctionExists)
  include(CheckIncludeFile)
  include(CheckSymbolExists)

  if(NOT APPLE)
    CHECK_INCLUDE_FILE(pthread.h HAVE_PTHREAD)
    if(ANDROID)
      set(OPENCV_LINKER_LIBS ${OPENCV_LINKER_LIBS} dl m log)
    elseif(CMAKE_SYSTEM_NAME MATCHES "FreeBSD|NetBSD|DragonFly|OpenBSD|Haiku")
      set(OPENCV_LINKER_LIBS ${OPENCV_LINKER_LIBS} m pthread)
    elseif(EMSCRIPTEN)
      # no need to link to system libs with emscripten
    else()
      set(OPENCV_LINKER_LIBS ${OPENCV_LINKER_LIBS} dl m pthread rt)
    endif()
  else()
    set(HAVE_PTHREAD 1)
  endif()

  CHECK_SYMBOL_EXISTS(posix_memalign stdlib.h HAVE_POSIX_MEMALIGN)
  CHECK_INCLUDE_FILE(malloc.h HAVE_MALLOC_H)
  if(HAVE_MALLOC_H)
    CHECK_SYMBOL_EXISTS(memalign malloc.h HAVE_MEMALIGN)
  endif()
endif()

include(cmake/OpenCVPCHSupport.cmake)
include(cmake/OpenCVModule.cmake)

# ----------------------------------------------------------------------------
#  Detect endianness of build platform
# ----------------------------------------------------------------------------

if(IOS)
  # test_big_endian needs try_compile, which doesn't work for iOS
  # http://public.kitware.com/Bug/view.php?id=12288
  set(WORDS_BIGENDIAN 0)
else()
  include(TestBigEndian)
  test_big_endian(WORDS_BIGENDIAN)
endif()

# ----------------------------------------------------------------------------
#  Detect 3rd-party libraries
# ----------------------------------------------------------------------------

if(ANDROID AND WITH_CPUFEATURES)
  add_subdirectory(3rdparty/cpufeatures)
  set(HAVE_CPUFEATURES 1)
endif()

include(cmake/OpenCVFindFrameworks.cmake)

include(cmake/OpenCVFindLibsGrfmt.cmake)
include(cmake/OpenCVFindLibsGUI.cmake)
include(cmake/OpenCVFindLibsVideo.cmake)
include(cmake/OpenCVFindLibsPerf.cmake)
include(cmake/OpenCVFindLAPACK.cmake)
include(cmake/OpenCVFindProtobuf.cmake)

# ----------------------------------------------------------------------------
#  Detect other 3rd-party libraries/tools
# ----------------------------------------------------------------------------

# --- Java Support ---
if(BUILD_JAVA)
  if(ANDROID)
    include(cmake/android/OpenCVDetectAndroidSDK.cmake)
  else()
    include(cmake/OpenCVDetectApacheAnt.cmake)
    find_package(JNI)
  endif()
endif()

if(ENABLE_PYLINT AND PYTHON_DEFAULT_AVAILABLE)
  include(cmake/OpenCVPylint.cmake)
endif()
if(ENABLE_FLAKE8 AND PYTHON_DEFAULT_AVAILABLE)
  find_package(Flake8 QUIET)
  if(NOT FLAKE8_FOUND OR NOT FLAKE8_EXECUTABLE)
    include("${CMAKE_CURRENT_LIST_DIR}/cmake/FindFlake8.cmake")
  endif()
  if(FLAKE8_FOUND)
    add_custom_target(check_flake8
        COMMAND "${FLAKE8_EXECUTABLE}" . --count --select=E9,E901,E999,F821,F822,F823 --show-source --statistics --exclude='.git,__pycache__,*.config.py,svgfig.py'
        WORKING_DIRECTORY "${OpenCV_SOURCE_DIR}"
        COMMENT "Running flake8"
    )
  endif()
endif()


if(ANDROID AND ANDROID_EXECUTABLE AND ANT_EXECUTABLE AND (ANT_VERSION VERSION_GREATER 1.7) AND (ANDROID_TOOLS_Pkg_Revision GREATER 13))
  SET(CAN_BUILD_ANDROID_PROJECTS TRUE)
else()
  SET(CAN_BUILD_ANDROID_PROJECTS FALSE)
endif()

# --- OpenCL ---
if(WITH_OPENCL)
  include(cmake/OpenCVDetectOpenCL.cmake)
endif()

# --- Halide ---
if(WITH_HALIDE)
  include(cmake/OpenCVDetectHalide.cmake)
endif()

# --- VkCom ---
if(WITH_VULKAN)
  include(cmake/OpenCVDetectVulkan.cmake)
endif()

# --- Inference Engine ---
if(WITH_INF_ENGINE)
  include(cmake/OpenCVDetectInferenceEngine.cmake)
endif()

# --- DirectX ---
if(WITH_DIRECTX)
  include(cmake/OpenCVDetectDirectX.cmake)
endif()

if(WITH_VTK)
  include(cmake/OpenCVDetectVTK.cmake)
endif()

if(WITH_OPENVX)
  include(cmake/FindOpenVX.cmake)
endif()

if(WITH_QUIRC)
  add_subdirectory(3rdparty/quirc)
  set(HAVE_QUIRC TRUE)
endif()
# ----------------------------------------------------------------------------
# OpenCV HAL
# ----------------------------------------------------------------------------
set(_hal_includes "")
macro(ocv_hal_register HAL_LIBRARIES_VAR HAL_HEADERS_VAR HAL_INCLUDE_DIRS_VAR)
  # 1. libraries
  foreach (l ${${HAL_LIBRARIES_VAR}})
    if(NOT TARGET ${l})
      get_filename_component(l "${l}" ABSOLUTE)
    endif()
    list(APPEND OPENCV_HAL_LINKER_LIBS ${l})
  endforeach()
  # 2. headers
  foreach (h ${${HAL_HEADERS_VAR}})
    set(_hal_includes "${_hal_includes}\n#include \"${h}\"")
  endforeach()
  # 3. include paths
  ocv_include_directories(${${HAL_INCLUDE_DIRS_VAR}})
endmacro()

if(NOT DEFINED OpenCV_HAL)
  set(OpenCV_HAL "OpenCV_HAL")
endif()

if(HAVE_OPENVX)
  if(NOT ";${OpenCV_HAL};" MATCHES ";openvx;")
    set(OpenCV_HAL "openvx;${OpenCV_HAL}")
  endif()
endif()

if(WITH_CAROTENE)
  ocv_debug_message(STATUS "Enable carotene acceleration")
  if(NOT ";${OpenCV_HAL};" MATCHES ";carotene;")
    set(OpenCV_HAL "carotene;${OpenCV_HAL}")
  endif()
endif()

foreach(hal ${OpenCV_HAL})
  if(hal STREQUAL "carotene")
    add_subdirectory(3rdparty/carotene/hal)
    ocv_hal_register(CAROTENE_HAL_LIBRARIES CAROTENE_HAL_HEADERS CAROTENE_HAL_INCLUDE_DIRS)
    list(APPEND OpenCV_USED_HAL "carotene (ver ${CAROTENE_HAL_VERSION})")
  elseif(hal STREQUAL "openvx")
    add_subdirectory(3rdparty/openvx)
    ocv_hal_register(OPENVX_HAL_LIBRARIES OPENVX_HAL_HEADERS OPENVX_HAL_INCLUDE_DIRS)
    list(APPEND OpenCV_USED_HAL "openvx (ver ${OPENVX_HAL_VERSION})")
  else()
    ocv_debug_message(STATUS "OpenCV HAL: ${hal} ...")
    ocv_clear_vars(OpenCV_HAL_LIBRARIES OpenCV_HAL_HEADERS OpenCV_HAL_INCLUDE_DIRS)
    find_package(${hal} NO_MODULE QUIET)
    if(${hal}_FOUND)
      ocv_hal_register(OpenCV_HAL_LIBRARIES OpenCV_HAL_HEADERS OpenCV_HAL_INCLUDE_DIRS)
      list(APPEND OpenCV_USED_HAL "${hal} (ver ${${hal}_VERSION})")
    endif()
  endif()
endforeach()
configure_file("${OpenCV_SOURCE_DIR}/cmake/templates/custom_hal.hpp.in" "${CMAKE_BINARY_DIR}/custom_hal.hpp" @ONLY)
unset(_hal_includes)


# ----------------------------------------------------------------------------
# Code trace support
# ----------------------------------------------------------------------------
if(CV_TRACE)
  include(cmake/OpenCVDetectTrace.cmake)
endif()

ocv_cmake_hook(POST_DETECT_DEPENDECIES)  # typo, deprecated (2019-06)
ocv_cmake_hook(POST_DETECT_DEPENDENCIES)

# ----------------------------------------------------------------------------
# Solution folders:
# ----------------------------------------------------------------------------
if(ENABLE_SOLUTION_FOLDERS)
  set_property(GLOBAL PROPERTY USE_FOLDERS ON)
  set_property(GLOBAL PROPERTY PREDEFINED_TARGETS_FOLDER "CMakeTargets")
endif()

# Extra OpenCV targets: uninstall, package_source, perf, etc.
include(cmake/OpenCVExtraTargets.cmake)

# ----------------------------------------------------------------------------
# Process subdirectories
# ----------------------------------------------------------------------------

# opencv.hpp and legacy headers
add_subdirectory(include)

# Enable compiler options for OpenCV modules/apps/samples only (ignore 3rdparty)
ocv_add_modules_compiler_options()

# OpenCV modules
add_subdirectory(modules)

# Generate targets for documentation
add_subdirectory(doc)

# various data that is used by cv libraries and/or demo applications.
add_subdirectory(data)

# extra applications
if(BUILD_opencv_apps)
  add_subdirectory(apps)
endif()

# examples
if(BUILD_EXAMPLES OR BUILD_ANDROID_EXAMPLES OR INSTALL_PYTHON_EXAMPLES OR INSTALL_C_EXAMPLES)
  add_subdirectory(samples)
endif()

if(ANDROID)
  add_subdirectory(platforms/android/service)
endif()

# ----------------------------------------------------------------------------
# Finalization: generate configuration-based files
# ----------------------------------------------------------------------------

ocv_cmake_hook(PRE_FINALIZE)

# Generate platform-dependent and configuration-dependent headers
include(cmake/OpenCVGenHeaders.cmake)

# Generate opencv.pc for pkg-config command
if(OPENCV_GENERATE_PKGCONFIG)
  include(cmake/OpenCVGenPkgconfig.cmake)
endif()

# Generate OpenCV.mk for ndk-build (Android build tool)
include(cmake/OpenCVGenAndroidMK.cmake)

# Generate OpenCVConfig.cmake and OpenCVConfig-version.cmake for cmake projects
include(cmake/OpenCVGenConfig.cmake)

# Generate Info.plist for the IOS framework
if(APPLE_FRAMEWORK)
  include(cmake/OpenCVGenInfoPlist.cmake)
endif()

# Generate ABI descriptor
include(cmake/OpenCVGenABI.cmake)

# Generate environment setup file
if(INSTALL_TESTS AND OPENCV_TEST_DATA_PATH)
  if(ANDROID)
    get_filename_component(TEST_PATH ${OPENCV_TEST_INSTALL_PATH} DIRECTORY)
    configure_file("${CMAKE_CURRENT_SOURCE_DIR}/cmake/templates/opencv_run_all_tests_android.sh.in"
                   "${CMAKE_BINARY_DIR}/unix-install/opencv_run_all_tests.sh" @ONLY)
    install(PROGRAMS "${CMAKE_BINARY_DIR}/unix-install/opencv_run_all_tests.sh"
            DESTINATION ./ COMPONENT tests)
  elseif(WIN32)
    configure_file("${CMAKE_CURRENT_SOURCE_DIR}/cmake/templates/opencv_run_all_tests_windows.cmd.in"
                   "${CMAKE_BINARY_DIR}/win-install/opencv_run_all_tests.cmd" @ONLY)
    install(PROGRAMS "${CMAKE_BINARY_DIR}/win-install/opencv_run_all_tests.cmd"
            DESTINATION ${OPENCV_TEST_INSTALL_PATH} COMPONENT tests)
  elseif(UNIX)
    configure_file("${CMAKE_CURRENT_SOURCE_DIR}/cmake/templates/opencv_run_all_tests_unix.sh.in"
                   "${CMAKE_BINARY_DIR}/unix-install/opencv_run_all_tests.sh" @ONLY)
    install(PROGRAMS "${CMAKE_BINARY_DIR}/unix-install/opencv_run_all_tests.sh"
            DESTINATION ${OPENCV_TEST_INSTALL_PATH} COMPONENT tests)
  endif()
endif()

if(NOT OPENCV_README_FILE)
  if(ANDROID)
    set(OPENCV_README_FILE ${CMAKE_CURRENT_SOURCE_DIR}/platforms/android/README.android)
  endif()
endif()

if(NOT OPENCV_LICENSE_FILE)
  set(OPENCV_LICENSE_FILE ${CMAKE_CURRENT_SOURCE_DIR}/LICENSE)
endif()

# for UNIX it does not make sense as LICENSE and readme will be part of the package automatically
if(ANDROID OR NOT UNIX)
  install(FILES ${OPENCV_LICENSE_FILE}
        PERMISSIONS OWNER_READ GROUP_READ WORLD_READ
        DESTINATION ./ COMPONENT libs)
  if(OPENCV_README_FILE)
    install(FILES ${OPENCV_README_FILE}
            PERMISSIONS OWNER_READ GROUP_READ WORLD_READ
            DESTINATION ./ COMPONENT libs)
  endif()
endif()

if(COMMAND ocv_pylint_finalize)
  ocv_pylint_add_directory(${CMAKE_CURRENT_LIST_DIR}/modules/python/test)
  ocv_pylint_add_directory(${CMAKE_CURRENT_LIST_DIR}/samples/python)
  ocv_pylint_add_directory(${CMAKE_CURRENT_LIST_DIR}/samples/dnn)
  ocv_pylint_add_directory_recurse(${CMAKE_CURRENT_LIST_DIR}/samples/python/tutorial_code)
  ocv_pylint_finalize()
endif()

if(OPENCV_GENERATE_SETUPVARS)
  include(cmake/OpenCVGenSetupVars.cmake)
endif()

# ----------------------------------------------------------------------------
# Summary:
# ----------------------------------------------------------------------------
status("")
status("General configuration for OpenCV ${OPENCV_VERSION} =====================================")
if(OPENCV_VCSVERSION)
  status("  Version control:" ${OPENCV_VCSVERSION})
endif()
if(OPENCV_EXTRA_MODULES_PATH AND NOT BUILD_INFO_SKIP_EXTRA_MODULES)
  set(__dump_extra_header OFF)
  foreach(p ${OPENCV_EXTRA_MODULES_PATH})
    if(EXISTS ${p})
      if(NOT __dump_extra_header)
        set(__dump_extra_header ON)
        status("")
        status("  Extra modules:")
      else()
        status("")
      endif()
      ocv_git_describe(EXTRA_MODULES_VCSVERSION "${p}")
      status("    Location (extra):" ${p})
      status("    Version control (extra):" ${EXTRA_MODULES_VCSVERSION})
    endif()
  endforeach()
  unset(__dump_extra_header)
endif()

# ========================== build platform ==========================
status("")
status("  Platform:")
if(NOT DEFINED OPENCV_TIMESTAMP
    AND NOT CMAKE_VERSION VERSION_LESS 2.8.11
    AND NOT BUILD_INFO_SKIP_TIMESTAMP
)
  string(TIMESTAMP OPENCV_TIMESTAMP "" UTC)
  set(OPENCV_TIMESTAMP "${OPENCV_TIMESTAMP}" CACHE STRING "Timestamp of OpenCV build configuration" FORCE)
endif()
if(OPENCV_TIMESTAMP)
  status("    Timestamp:"      ${OPENCV_TIMESTAMP})
endif()
status("    Host:"             ${CMAKE_HOST_SYSTEM_NAME} ${CMAKE_HOST_SYSTEM_VERSION} ${CMAKE_HOST_SYSTEM_PROCESSOR})
if(CMAKE_CROSSCOMPILING)
  status("    Target:"         ${CMAKE_SYSTEM_NAME} ${CMAKE_SYSTEM_VERSION} ${CMAKE_SYSTEM_PROCESSOR})
endif()
status("    CMake:"            ${CMAKE_VERSION})
status("    CMake generator:"  ${CMAKE_GENERATOR})
status("    CMake build tool:" ${CMAKE_BUILD_TOOL})
if(MSVC)
  status("    MSVC:"           ${MSVC_VERSION})
endif()
if(CMAKE_GENERATOR MATCHES Xcode)
  status("    Xcode:"          ${XCODE_VERSION})
endif()
if(NOT CMAKE_GENERATOR MATCHES "Xcode|Visual Studio")
  status("    Configuration:"  ${CMAKE_BUILD_TYPE})
endif()


# ========================= CPU code generation mode =========================
status("")
status("  CPU/HW features:")
status("    Baseline:"  "${CPU_BASELINE_FINAL}")
if(NOT CPU_BASELINE STREQUAL CPU_BASELINE_FINAL)
  status("      requested:"  "${CPU_BASELINE}")
endif()
if(CPU_BASELINE_REQUIRE)
  status("      required:"  "${CPU_BASELINE_REQUIRE}")
endif()
if(CPU_BASELINE_DISABLE)
  status("      disabled:"  "${CPU_BASELINE_DISABLE}")
endif()
if(CPU_DISPATCH_FINAL OR CPU_DISPATCH)
  status("    Dispatched code generation:"  "${CPU_DISPATCH_FINAL}")
  if(NOT CPU_DISPATCH STREQUAL CPU_DISPATCH_FINAL)
    status("      requested:"  "${CPU_DISPATCH}")
  endif()
  if(CPU_DISPATCH_REQUIRE)
    status("      required:"  "${CPU_DISPATCH_REQUIRE}")
  endif()
  foreach(OPT ${CPU_DISPATCH_FINAL})
    status("      ${OPT} (${CPU_${OPT}_USAGE_COUNT} files):"  "+ ${CPU_DISPATCH_${OPT}_INCLUDED}")
  endforeach()
endif()

# ========================== C/C++ options ==========================
if(CMAKE_CXX_COMPILER_VERSION)
  set(OPENCV_COMPILER_STR "${CMAKE_CXX_COMPILER} ${CMAKE_CXX_COMPILER_ARG1} (ver ${CMAKE_CXX_COMPILER_VERSION})")
else()
  set(OPENCV_COMPILER_STR "${CMAKE_CXX_COMPILER} ${CMAKE_CXX_COMPILER_ARG1}")
endif()
string(STRIP "${OPENCV_COMPILER_STR}" OPENCV_COMPILER_STR)

status("")
status("  C/C++:")
status("    Built as dynamic libs?:" BUILD_SHARED_LIBS THEN YES ELSE NO)
status("    C++ Compiler:"           ${OPENCV_COMPILER_STR})
status("    C++ flags (Release):"    ${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_RELEASE})
status("    C++ flags (Debug):"      ${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_DEBUG})
status("    C Compiler:"             ${CMAKE_C_COMPILER} ${CMAKE_C_COMPILER_ARG1})
status("    C flags (Release):"      ${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_RELEASE})
status("    C flags (Debug):"        ${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_DEBUG})
if(WIN32)
  status("    Linker flags (Release):" ${CMAKE_EXE_LINKER_FLAGS} ${CMAKE_EXE_LINKER_FLAGS_RELEASE})
  status("    Linker flags (Debug):"   ${CMAKE_EXE_LINKER_FLAGS} ${CMAKE_EXE_LINKER_FLAGS_DEBUG})
else()
  status("    Linker flags (Release):" ${CMAKE_SHARED_LINKER_FLAGS} ${CMAKE_SHARED_LINKER_FLAGS_RELEASE})
  status("    Linker flags (Debug):"   ${CMAKE_SHARED_LINKER_FLAGS} ${CMAKE_SHARED_LINKER_FLAGS_DEBUG})
endif()
status("    ccache:"                  OPENCV_COMPILER_IS_CCACHE THEN YES ELSE NO)
status("    Precompiled headers:"     PCHSupport_FOUND AND ENABLE_PRECOMPILED_HEADERS THEN YES ELSE NO)

# ========================== Dependencies ============================
ocv_get_all_libs(deps_modules deps_extra deps_3rdparty)
status("    Extra dependencies:" ${deps_extra})
status("    3rdparty dependencies:" ${deps_3rdparty})

# ========================== OpenCV modules ==========================
status("")
status("  OpenCV modules:")
set(OPENCV_MODULES_BUILD_ST "")
foreach(the_module ${OPENCV_MODULES_BUILD})
  if(NOT OPENCV_MODULE_${the_module}_CLASS STREQUAL "INTERNAL" OR the_module STREQUAL "opencv_ts")
    list(APPEND OPENCV_MODULES_BUILD_ST "${the_module}")
  endif()
endforeach()
string(REPLACE "opencv_" "" OPENCV_MODULES_BUILD_ST          "${OPENCV_MODULES_BUILD_ST}")
string(REPLACE "opencv_" "" OPENCV_MODULES_DISABLED_USER_ST  "${OPENCV_MODULES_DISABLED_USER}")
string(REPLACE "opencv_" "" OPENCV_MODULES_DISABLED_AUTO_ST  "${OPENCV_MODULES_DISABLED_AUTO}")
string(REPLACE "opencv_" "" OPENCV_MODULES_DISABLED_FORCE_ST "${OPENCV_MODULES_DISABLED_FORCE}")
list(SORT OPENCV_MODULES_BUILD_ST)
list(SORT OPENCV_MODULES_DISABLED_USER_ST)
list(SORT OPENCV_MODULES_DISABLED_AUTO_ST)
list(SORT OPENCV_MODULES_DISABLED_FORCE_ST)
status("    To be built:"            OPENCV_MODULES_BUILD          THEN ${OPENCV_MODULES_BUILD_ST}          ELSE "-")
status("    Disabled:"               OPENCV_MODULES_DISABLED_USER  THEN ${OPENCV_MODULES_DISABLED_USER_ST}  ELSE "-")
status("    Disabled by dependency:" OPENCV_MODULES_DISABLED_AUTO  THEN ${OPENCV_MODULES_DISABLED_AUTO_ST}  ELSE "-")
status("    Unavailable:"            OPENCV_MODULES_DISABLED_FORCE THEN ${OPENCV_MODULES_DISABLED_FORCE_ST} ELSE "-")

ocv_build_features_string(apps_status
  IF BUILD_TESTS AND HAVE_opencv_ts THEN "tests"
  IF BUILD_PERF_TESTS AND HAVE_opencv_ts THEN "perf_tests"
  IF BUILD_EXAMPLES THEN "examples"
  IF BUILD_opencv_apps THEN "apps"
  IF BUILD_ANDROID_SERVICE THEN "android_service"
  IF BUILD_ANDROID_EXAMPLES AND CAN_BUILD_ANDROID_PROJECTS THEN "android_examples"
  ELSE "-")
status("    Applications:" "${apps_status}")
ocv_build_features_string(docs_status
    IF TARGET doxygen_cpp THEN "doxygen"
    IF TARGET doxygen_python THEN "python"
    IF TARGET doxygen_javadoc THEN "javadoc"
    IF BUILD_opencv_js OR DEFINED OPENCV_JS_LOCATION THEN "js"
    ELSE "NO"
)
status("    Documentation:" "${docs_status}")
status("    Non-free algorithms:" OPENCV_ENABLE_NONFREE THEN "YES" ELSE "NO")

# ========================== Android details ==========================
if(ANDROID)
  status("")
  if(DEFINED ANDROID_NDK_REVISION)
    set(__msg "${ANDROID_NDK} (ver ${ANDROID_NDK_REVISION})")
  else()
    set(__msg "location: ${ANDROID_NDK}")
  endif()
  status("  Android NDK: " ${__msg})
  status("    Android ABI:" ${ANDROID_ABI})
  if(BUILD_WITH_STANDALONE_TOOLCHAIN)
    status("    NDK toolchain:" "standalone: ${ANDROID_STANDALONE_TOOLCHAIN}")
  elseif(BUILD_WITH_ANDROID_NDK OR DEFINED ANDROID_TOOLCHAIN_NAME)
    status("    NDK toolchain:" "${ANDROID_TOOLCHAIN_NAME}")
  endif()
  status("    STL type:" ${ANDROID_STL})
  status("    Native API level:" ${ANDROID_NATIVE_API_LEVEL})

  if(BUILD_ANDROID_PROJECTS)
    status("  Android SDK: " "${ANDROID_SDK} (tools: ${ANDROID_SDK_TOOLS_VERSION} build tools: ${ANDROID_SDK_BUILD_TOOLS_VERSION})")
    if(ANDROID_EXECUTABLE)
      status("    android tool:"  "${ANDROID_EXECUTABLE}")
    endif()
  else()
    status("  Android SDK: " "not used, projects are not built")
  endif()
  if(DEFINED ANDROID_SDK_COMPATIBLE_TARGET)
    status("    SDK target:" "${ANDROID_SDK_COMPATIBLE_TARGET}")
  endif()
  if(DEFINED ANDROID_PROJECTS_BUILD_TYPE)
    if(ANDROID_PROJECTS_BUILD_TYPE STREQUAL "ANT")
      status("    Projects build scripts:" "Ant/Eclipse compatible")
    elseif(ANDROID_PROJECTS_BUILD_TYPE STREQUAL "ANT")
      status("    Projects build scripts:" "Gradle")
    endif()
  endif()
endif()

# ================== Windows RT features ==================
if(WIN32)
status("")
status("  Windows RT support:" WINRT THEN YES ELSE NO)
  if(WINRT)
    status("    Building for Microsoft platform: " ${CMAKE_SYSTEM_NAME})
    status("    Building for architectures: " ${CMAKE_VS_EFFECTIVE_PLATFORMS})
    status("    Building for version: " ${CMAKE_SYSTEM_VERSION})
    if (DEFINED ENABLE_WINRT_MODE_NATIVE)
      status("    Building for C++ without CX extensions")
    endif()
  endif()
endif(WIN32)

# ========================== GUI ==========================
status("")
status("  GUI: ")

if(WITH_QT OR HAVE_QT)
  if(HAVE_QT5)
    status("    QT:" "YES (ver ${Qt5Core_VERSION_STRING})")
    status("      QT OpenGL support:" HAVE_QT_OPENGL THEN "YES (${Qt5OpenGL_LIBRARIES} ${Qt5OpenGL_VERSION_STRING})" ELSE NO)
  elseif(HAVE_QT)
    status("    QT:" "YES (ver ${QT_VERSION_MAJOR}.${QT_VERSION_MINOR}.${QT_VERSION_PATCH} ${QT_EDITION})")
    status("      QT OpenGL support:" HAVE_QT_OPENGL THEN "YES (${QT_QTOPENGL_LIBRARY})" ELSE NO)
  else()
    status("    QT:" "NO")
  endif()
endif()

if(WITH_WIN32UI)
  status("    Win32 UI:" HAVE_WIN32UI THEN YES ELSE NO)
endif()

if(HAVE_COCOA)  # APPLE
  status("    Cocoa:"  YES)
endif()

if(WITH_GTK OR HAVE_GTK)
  if(HAVE_GTK3)
    status("    GTK+:" "YES (ver ${GTK3_VERSION})")
  elseif(HAVE_GTK)
    status("    GTK+:" "YES (ver ${GTK2_VERSION})")
  else()
    status("    GTK+:" "NO")
  endif()
  if(HAVE_GTK)
    status(  "      GThread :" HAVE_GTHREAD THEN "YES (ver ${GTHREAD_VERSION})" ELSE NO)
    status(  "      GtkGlExt:" HAVE_GTKGLEXT THEN "YES (ver ${GTKGLEXT_VERSION})" ELSE NO)
  endif()
endif()

if(WITH_OPENGL OR HAVE_OPENGL)
  status("    OpenGL support:" HAVE_OPENGL THEN "YES (${OPENGL_LIBRARIES})" ELSE NO)
endif()

if(WITH_VTK OR HAVE_VTK)
  status("    VTK support:" HAVE_VTK THEN "YES (ver ${VTK_VERSION})" ELSE NO)
endif()

# ========================== MEDIA IO ==========================
status("")
status("  Media I/O: ")
status("    ZLib:"   ZLIB_FOUND THEN "${ZLIB_LIBRARIES} (ver ${ZLIB_VERSION_STRING})" ELSE "build (ver ${ZLIB_VERSION_STRING})")

if(WITH_JPEG OR HAVE_JPEG)
  if(NOT HAVE_JPEG)
    status("    JPEG:" NO)
  elseif(BUILD_JPEG)
    status("    JPEG:" "build-${JPEG_LIBRARY} (ver ${JPEG_LIB_VERSION})")
  else()
    status("    JPEG:" "${JPEG_LIBRARY} (ver ${JPEG_LIB_VERSION})")
  endif()
endif()

if(WITH_WEBP OR HAVE_WEBP)
  status("    WEBP:" WEBP_FOUND THEN "${WEBP_LIBRARY} (ver ${WEBP_VERSION})" ELSE "build (ver ${WEBP_VERSION})")
endif()

if(WITH_PNG OR HAVE_PNG)
  status("    PNG:"  PNG_FOUND  THEN "${PNG_LIBRARY} (ver ${PNG_VERSION})" ELSE "build (ver ${PNG_VERSION})")
endif()

if(WITH_TIFF OR HAVE_TIFF)
  status("    TIFF:" TIFF_FOUND THEN "${TIFF_LIBRARY} (ver ${TIFF_VERSION} / ${TIFF_VERSION_STRING})" ELSE "build (ver ${TIFF_VERSION} - ${TIFF_VERSION_STRING})")
endif()

if(WITH_JASPER OR HAVE_JASPER)
  status("    JPEG 2000:" JASPER_FOUND THEN "${JASPER_LIBRARY} (ver ${JASPER_VERSION_STRING})" ELSE "build (ver ${JASPER_VERSION_STRING})")
endif()

if(WITH_OPENEXR OR HAVE_OPENEXR)
  if(HAVE_OPENEXR)
    status("    OpenEXR:" OPENEXR_FOUND THEN "${OPENEXR_LIBRARIES} (ver ${OPENEXR_VERSION})" ELSE "build (ver ${OPENEXR_VERSION})")
  else()
    status("    OpenEXR:" "NO")
  endif()
endif()

if(WITH_GDAL OR HAVE_GDAL)
  status("    GDAL:" HAVE_GDAL THEN "YES (${GDAL_LIBRARY})" ELSE "NO")
endif()

if(WITH_GDCM OR HAVE_GDCM)
  status("    GDCM:" HAVE_GDCM THEN "YES (${GDCM_VERSION})" ELSE "NO")
endif()

if(WITH_IMGCODEC_HDR OR DEFINED HAVE_IMGCODEC_HDR)
  status("    HDR:" HAVE_IMGCODEC_HDR THEN "YES" ELSE "NO")
endif()

if(WITH_IMGCODEC_SUNRASTER OR DEFINED HAVE_IMGCODEC_SUNRASTER)
  status("    SUNRASTER:" HAVE_IMGCODEC_SUNRASTER THEN "YES" ELSE "NO")
endif()

if(WITH_IMGCODEC_PXM OR DEFINED HAVE_IMGCODEC_PXM)
  status("    PXM:" HAVE_IMGCODEC_PXM THEN "YES" ELSE "NO")
endif()

if(WITH_IMGCODEC_PFM OR DEFINED HAVE_IMGCODEC_PFM)
  status("    PFM:" HAVE_IMGCODEC_PFM THEN "YES" ELSE "NO")
endif()

# ========================== VIDEO IO ==========================
status("")
status("  Video I/O:")

if(WITH_1394 OR HAVE_DC1394_2)
  status("    DC1394:" HAVE_DC1394_2 THEN "YES (${DC1394_2_VERSION})" ELSE NO)
endif()

if(WITH_FFMPEG OR HAVE_FFMPEG)
  if(OPENCV_FFMPEG_USE_FIND_PACKAGE)
    status("    FFMPEG:"       HAVE_FFMPEG         THEN "YES (find_package)"                       ELSE "NO (find_package)")
  elseif(WIN32)
    status("    FFMPEG:"       HAVE_FFMPEG         THEN "YES (prebuilt binaries)"                  ELSE NO)
  else()
    status("    FFMPEG:"       HAVE_FFMPEG         THEN YES ELSE NO)
  endif()
  status("      avcodec:"      FFMPEG_libavcodec_VERSION    THEN "YES (${FFMPEG_libavcodec_VERSION})"    ELSE NO)
  status("      avformat:"     FFMPEG_libavformat_VERSION   THEN "YES (${FFMPEG_libavformat_VERSION})"   ELSE NO)
  status("      avutil:"       FFMPEG_libavutil_VERSION     THEN "YES (${FFMPEG_libavutil_VERSION})"     ELSE NO)
  status("      swscale:"      FFMPEG_libswscale_VERSION    THEN "YES (${FFMPEG_libswscale_VERSION})"    ELSE NO)
  status("      avresample:"   FFMPEG_libavresample_VERSION THEN "YES (${FFMPEG_libavresample_VERSION})" ELSE NO)
endif()

if(WITH_GSTREAMER OR HAVE_GSTREAMER)
  status("    GStreamer:" HAVE_GSTREAMER THEN "YES (${GSTREAMER_VERSION})" ELSE NO)
endif()

if(WITH_OPENNI2 OR HAVE_OPENNI2)
  status("    OpenNI2:"        HAVE_OPENNI2    THEN "YES (${OPENNI2_VERSION})" ELSE NO)
endif()

if(WITH_PVAPI OR HAVE_PVAPI)
  status("    PvAPI:" HAVE_PVAPI THEN YES ELSE NO)
endif()

if(WITH_ARAVIS OR HAVE_ARAVIS_API)
  status("    Aravis SDK:" HAVE_ARAVIS_API THEN "YES (${ARAVIS_VERSION})" ELSE NO)
endif()

if(WITH_AVFOUNDATION OR HAVE_AVFOUNDATION)
  status("    AVFoundation:" HAVE_AVFOUNDATION THEN YES ELSE NO)
endif()

if(HAVE_CAP_IOS)
  status("    iOS capture:" YES)
endif()

if(WITH_V4L OR HAVE_V4L)
  ocv_build_features_string(v4l_status
    IF HAVE_CAMV4L2 THEN "linux/videodev2.h"
    IF HAVE_VIDEOIO THEN "sys/videoio.h"
    ELSE "NO")
  status("    v4l/v4l2:" HAVE_V4L THEN "YES (${v4l_status})" ELSE NO)
endif()

if(WITH_DSHOW OR HAVE_DSHOW)
  status("    DirectShow:" HAVE_DSHOW THEN YES ELSE NO)
endif()

if(WITH_MSMF OR HAVE_MSMF)
  status("    Media Foundation:" HAVE_MSMF THEN YES ELSE NO)
  status("      DXVA:" HAVE_MSMF_DXVA THEN YES ELSE NO)
endif()

if(WITH_XIMEA OR HAVE_XIMEA)
  status("    XIMEA:" HAVE_XIMEA THEN YES ELSE NO)
endif()

if(WITH_XINE OR HAVE_XINE)
  status("    Xine:"           HAVE_XINE           THEN "YES (ver ${XINE_VERSION})"     ELSE NO)
endif()

if(WITH_LIBREALSENSE OR HAVE_LIBREALSENSE)
  status("    Intel RealSense:" HAVE_LIBREALSENSE THEN "YES (${LIBREALSENSE_VERSION})" ELSE NO)
endif()

if(WITH_MFX OR HAVE_MFX)
  status("    Intel Media SDK:" HAVE_MFX      THEN "YES (${MFX_LIBRARY})" ELSE NO)
endif()

if(WITH_GPHOTO2 OR HAVE_GPHOTO2)
  status("    gPhoto2:"        HAVE_GPHOTO2        THEN "YES"                                 ELSE NO)
endif()

# Order is similar to CV_PARALLEL_FRAMEWORK in core/src/parallel.cpp
ocv_build_features_string(parallel_status EXCLUSIVE
  IF HAVE_TBB THEN "TBB (ver ${TBB_VERSION_MAJOR}.${TBB_VERSION_MINOR} interface ${TBB_INTERFACE_VERSION})"
  IF HAVE_HPX THEN "HPX"
  IF HAVE_OPENMP THEN "OpenMP"
  IF HAVE_GCD THEN "GCD"
  IF WINRT OR HAVE_CONCURRENCY THEN "Concurrency"
  IF HAVE_PTHREADS_PF THEN "pthreads"
  ELSE "none")
status("")
status("  Parallel framework:" "${parallel_status}")

if(CV_TRACE OR OPENCV_TRACE)
  ocv_build_features_string(trace_status EXCLUSIVE
    IF HAVE_ITT THEN "with Intel ITT"
    ELSE "built-in")
  status("")
  status("  Trace: " OPENCV_TRACE THEN "YES (${trace_status})" ELSE NO)
endif()

# ========================== Other third-party libraries ==========================
status("")
status("  Other third-party libraries:")

if(WITH_IPP AND HAVE_IPP)
  status("    Intel IPP:" "${IPP_VERSION_STR} [${IPP_VERSION_MAJOR}.${IPP_VERSION_MINOR}.${IPP_VERSION_BUILD}]")
  status("           at:" "${IPP_ROOT_DIR}")
  if(NOT HAVE_IPP_ICV)
    status("       linked:" BUILD_WITH_DYNAMIC_IPP THEN "dynamic" ELSE "static")
  endif()
  if(HAVE_IPP_IW)
    if(BUILD_IPP_IW)
      status("    Intel IPP IW:" "sources (${IW_VERSION_MAJOR}.${IW_VERSION_MINOR}.${IW_VERSION_UPDATE})")
    else()
      status("    Intel IPP IW:" "binaries (${IW_VERSION_MAJOR}.${IW_VERSION_MINOR}.${IW_VERSION_UPDATE})")
    endif()
    status("              at:" "${IPP_IW_PATH}")
  else()
    status("    Intel IPP IW:"   NO)
  endif()
endif()

if(WITH_VA OR HAVE_VA)
  status("    VA:"            HAVE_VA          THEN "YES" ELSE NO)
endif()

if(WITH_VA_INTEL OR HAVE_VA_INTEL)
  status("    Intel VA-API/OpenCL:"  HAVE_VA_INTEL       THEN "YES (OpenCL: ${VA_INTEL_IOCL_ROOT})" ELSE NO)
endif()

if(WITH_LAPACK OR HAVE_LAPACK)
  status("    Lapack:"      HAVE_LAPACK     THEN "YES (${LAPACK_LIBRARIES})" ELSE NO)
endif()

if(WITH_HALIDE OR HAVE_HALIDE)
  status("    Halide:"     HAVE_HALIDE      THEN "YES (${HALIDE_LIBRARIES} ${HALIDE_INCLUDE_DIRS})" ELSE NO)
endif()

if(WITH_INF_ENGINE OR INF_ENGINE_TARGET)
  if(INF_ENGINE_TARGET)
    set(__msg "YES (${INF_ENGINE_RELEASE} / ${INF_ENGINE_VERSION})")
    get_target_property(_lib ${INF_ENGINE_TARGET} IMPORTED_LOCATION)
    get_target_property(_lib_imp_rel ${INF_ENGINE_TARGET} IMPORTED_IMPLIB_RELEASE)
    get_target_property(_lib_imp_dbg ${INF_ENGINE_TARGET} IMPORTED_IMPLIB_DEBUG)
    get_target_property(_lib_rel ${INF_ENGINE_TARGET} IMPORTED_LOCATION_RELEASE)
    get_target_property(_lib_dbg ${INF_ENGINE_TARGET} IMPORTED_LOCATION_DEBUG)
    ocv_build_features_string(_lib
      IF _lib THEN "${_lib}"
      IF _lib_imp_rel AND _lib_imp_dbg THEN "${_lib_imp_rel} / ${_lib_imp_dbg}"
      IF _lib_rel AND _lib_dbg THEN "${_lib_rel} / ${_lib_dbg}"
      ELSE "unknown"
    )
    get_target_property(_inc ${INF_ENGINE_TARGET} INTERFACE_INCLUDE_DIRECTORIES)
    status("    Inference Engine:" "${__msg}")
    status("                libs:" "${_lib}")
    status("            includes:" "${_inc}")
  else()
    status("    Inference Engine:"     "NO")
  endif()
endif()

if(WITH_EIGEN OR HAVE_EIGEN)
  status("    Eigen:"      HAVE_EIGEN       THEN "YES (ver ${EIGEN_WORLD_VERSION}.${EIGEN_MAJOR_VERSION}.${EIGEN_MINOR_VERSION})" ELSE NO)
endif()

if(WITH_OPENVX OR HAVE_OPENVX)
  status("    OpenVX:"     HAVE_OPENVX      THEN "YES (${OPENVX_LIBRARIES})" ELSE "NO")
endif()

status("    Custom HAL:" OpenCV_USED_HAL  THEN "YES (${OpenCV_USED_HAL})" ELSE "NO")

foreach(s ${CUSTOM_STATUS})
  status(${CUSTOM_STATUS_${s}})
endforeach()

if(WITH_CUDA OR HAVE_CUDA)
  ocv_build_features_string(cuda_features
    IF HAVE_CUFFT THEN "CUFFT"
    IF HAVE_CUBLAS THEN "CUBLAS"
    IF HAVE_NVCUVID THEN "NVCUVID"
    IF CUDA_FAST_MATH THEN "FAST_MATH"
    ELSE "no extra features")
  status("")
  status("  NVIDIA CUDA:" HAVE_CUDA THEN "YES (ver ${CUDA_VERSION_STRING}, ${cuda_features})" ELSE NO)
  if(HAVE_CUDA)
    status("    NVIDIA GPU arch:"      ${OPENCV_CUDA_ARCH_BIN})
    status("    NVIDIA PTX archs:"     ${OPENCV_CUDA_ARCH_PTX})
  endif()
 endif()

 if(WITH_CUDNN OR HAVE_CUDNN)
    status("")
    status("  cuDNN:" HAVE_CUDNN THEN "YES (ver ${CUDNN_VERSION})" ELSE NO)
endif()

if(WITH_VULKAN OR HAVE_VULKAN)
  status("")
  status("  Vulkan:"     HAVE_VULKAN THEN "YES" ELSE "NO")
  if(HAVE_VULKAN)
    status("    Include path:"  VULKAN_INCLUDE_DIRS THEN "${VULKAN_INCLUDE_DIRS}" ELSE "NO")
    status("    Link libraries:" VULKAN_LIBRARIES THEN "${VULKAN_LIBRARIES}" ELSE "Dynamic load")
  endif()
endif()

if(WITH_OPENCL OR HAVE_OPENCL)
  ocv_build_features_string(opencl_features
    IF HAVE_OPENCL_SVM THEN "SVM"
    IF HAVE_CLAMDFFT THEN "AMDFFT"
    IF HAVE_CLAMDBLAS THEN "AMDBLAS"
    IF HAVE_OPENCL_D3D11_NV THEN "NVD3D11"
    ELSE "no extra features")
  status("")
  status("  OpenCL:"     HAVE_OPENCL   THEN   "YES (${opencl_features})" ELSE "NO")
  if(HAVE_OPENCL)
    status("    Include path:"  OPENCL_INCLUDE_DIRS THEN "${OPENCL_INCLUDE_DIRS}" ELSE "NO")
    status("    Link libraries:"       OPENCL_LIBRARIES THEN "${OPENCL_LIBRARIES}" ELSE "Dynamic load")
  endif()
endif()

# ========================== python ==========================
if(BUILD_opencv_python2)
  status("")
  status("  Python 2:")
  status("    Interpreter:"     PYTHON2INTERP_FOUND  THEN "${PYTHON2_EXECUTABLE} (ver ${PYTHON2_VERSION_STRING})"       ELSE NO)
  if(PYTHON2LIBS_VERSION_STRING)
    status("    Libraries:"   HAVE_opencv_python2  THEN  "${PYTHON2_LIBRARIES} (ver ${PYTHON2LIBS_VERSION_STRING})"   ELSE NO)
  else()
    status("    Libraries:"   HAVE_opencv_python2  THEN  "${PYTHON2_LIBRARIES}"                                      ELSE NO)
  endif()
  status("    numpy:"         PYTHON2_NUMPY_INCLUDE_DIRS THEN "${PYTHON2_NUMPY_INCLUDE_DIRS} (ver ${PYTHON2_NUMPY_VERSION})" ELSE "NO (Python wrappers can not be generated)")
  status("    install path:"  HAVE_opencv_python2  THEN "${__INSTALL_PATH_PYTHON2}"                            ELSE "-")
endif()

if(BUILD_opencv_python3)
  status("")
  status("  Python 3:")
  status("    Interpreter:"     PYTHON3INTERP_FOUND  THEN "${PYTHON3_EXECUTABLE} (ver ${PYTHON3_VERSION_STRING})"       ELSE NO)
  if(PYTHON3LIBS_VERSION_STRING)
    status("    Libraries:"   HAVE_opencv_python3  THEN  "${PYTHON3_LIBRARIES} (ver ${PYTHON3LIBS_VERSION_STRING})"   ELSE NO)
  else()
    status("    Libraries:"   HAVE_opencv_python3  THEN  "${PYTHON3_LIBRARIES}"                                      ELSE NO)
  endif()
  status("    numpy:"         PYTHON3_NUMPY_INCLUDE_DIRS THEN "${PYTHON3_NUMPY_INCLUDE_DIRS} (ver ${PYTHON3_NUMPY_VERSION})" ELSE "NO (Python3 wrappers can not be generated)")
  status("    install path:"  HAVE_opencv_python3  THEN "${__INSTALL_PATH_PYTHON3}"                            ELSE "-")
endif()

status("")
status("  Python (for build):"  PYTHON_DEFAULT_AVAILABLE THEN "${PYTHON_DEFAULT_EXECUTABLE}" ELSE NO)
if(PYLINT_FOUND AND PYLINT_EXECUTABLE)
  status("    Pylint:"  PYLINT_FOUND THEN "${PYLINT_EXECUTABLE} (ver: ${PYLINT_VERSION}, checks: ${PYLINT_TOTAL_TARGETS})" ELSE NO)
endif()
if(FLAKE8_FOUND AND FLAKE8_EXECUTABLE)
  status("    Flake8:"  FLAKE8_FOUND THEN "${FLAKE8_EXECUTABLE} (ver: ${FLAKE8_VERSION})" ELSE NO)
endif()

# ========================== java ==========================
if(BUILD_JAVA OR BUILD_opencv_java)
  status("")
  status("  Java:"            BUILD_FAT_JAVA_LIB  THEN "export all functions"                                      ELSE "")
  status("    ant:"           ANT_EXECUTABLE      THEN "${ANT_EXECUTABLE} (ver ${ANT_VERSION})"                    ELSE NO)
  if(NOT ANDROID)
    status("    JNI:"         JNI_INCLUDE_DIRS    THEN "${JNI_INCLUDE_DIRS}"                                       ELSE NO)
  endif()
  status("    Java wrappers:" HAVE_opencv_java                                                            THEN YES ELSE NO)
  status("    Java tests:"    BUILD_TESTS AND opencv_test_java_BINARY_DIR                                 THEN YES ELSE NO)
endif()

ocv_cmake_hook(STATUS_DUMP_EXTRA)

# ========================== auxiliary ==========================
status("")
status("  Install to:" "${CMAKE_INSTALL_PREFIX}")
status("-----------------------------------------------------------------")
status("")


ocv_finalize_status()

if(ENABLE_CONFIG_VERIFICATION)
  ocv_verify_config()
endif()

ocv_cmake_hook(POST_FINALIZE)

# ----------------------------------------------------------------------------
# CPack stuff
# ----------------------------------------------------------------------------

include(cmake/OpenCVPackaging.cmake)

# This should be the last command
ocv_cmake_dump_vars("" TOFILE "CMakeVars.txt")
ocv_cmake_eval(DEBUG_POST ONCE)