Merge pull request #10091 from alalek:build_python_reduce_global_symbols

modules/python/common.cmake

@@ -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)