message: cmake: OPENCV_FORCE_3RDPARTY_BUILD build flag
diff: @@ -206,16 +206,17 @@ endif()
  OCV_OPTION(OPENCV_ENABLE_NONFREE "Enable non-free algorithms" OFF)
  # 3rd party libs
  -OCV_OPTION(BUILD_ZLIB "Build zlib from source" WIN32 OR APPLE)
  -OCV_OPTION(BUILD_TIFF "Build libtiff from source" WIN32 OR ANDROID OR APPLE)
  -OCV_OPTION(BUILD_JASPER "Build libjasper from source" WIN32 OR ANDROID OR APPLE)
  -OCV_OPTION(BUILD_JPEG "Build libjpeg from source" WIN32 OR ANDROID OR APPLE)
  -OCV_OPTION(BUILD_PNG "Build libpng from source" WIN32 OR ANDROID OR APPLE)
  -OCV_OPTION(BUILD_OPENEXR "Build openexr from source" (WIN32 OR ANDROID OR APPLE) AND NOT WINRT)
  -OCV_OPTION(BUILD_WEBP "Build WebP from source" (WIN32 OR ANDROID OR APPLE) AND NOT WINRT)
  -OCV_OPTION(BUILD_TBB "Download and build TBB from source" ANDROID )
  -OCV_OPTION(BUILD_IPP_IW "Build IPP IW from source" NOT MINGW IF (X86_64 OR X86) AND NOT WINRT )
  -OCV_OPTION(BUILD_ITT "Build Intel ITT from source" NOT MINGW IF (X86_64 OR X86) AND NOT WINRT AND NOT APPLE_FRAMEWORK )
  +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) AND NOT WINRT AND NOT APPLE_FRAMEWORK )
  # Optional 3rd party components
  # ===================================================
  