Merge pull request #9913 from alalek:fix_fvisibility_regression

cmake/OpenCVCompilerOptions.cmake

@@ -280,7 +280,7 @@ set(OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEASE "${OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEA
 set(OPENCV_EXTRA_EXE_LINKER_FLAGS_DEBUG   "${OPENCV_EXTRA_EXE_LINKER_FLAGS_DEBUG}"   CACHE INTERNAL "Extra linker flags for Debug build")
 
 # set default visibility to hidden
-if((CMAKE_COMPILER_ID STREQUAL "GNU" OR CMAKE_COMPILER_ID STREQUAL "Clang")
+if((CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
     AND NOT OPENCV_SKIP_VISIBILITY_HIDDEN
     AND NOT CMAKE_CXX_FLAGS MATCHES "-fvisibility")
   add_extra_compiler_option(-fvisibility=hidden)