message: build: avoid exporting of unnecessary symbols from Python bindings
diff: @@ -4,6 +4,9 @@ set(PYTHON_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../")
  # try to use dynamic symbols linking with libpython.so
  set(OPENCV_FORCE_PYTHON_LIBS OFF CACHE BOOL "")
  string(REPLACE "-Wl,--no-undefined" "" CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS}")
  +if(NOT WIN32 AND NOT APPLE AND NOT OPENCV_PYTHON_SKIP_LINKER_EXCLUDE_LIBS)
  + set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -Wl,--exclude-libs=ALL")
  +endif()
  ocv_add_module(${MODULE_NAME} BINDINGS)
  