cmake: OPENCV_FORCE_3RDPARTY_BUILD build flag

CMakeLists.txt

@@ -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
 # ===================================================