cmake: disable override warnings in 3rdparty code and viz

3rdparty/openexr/CMakeLists.txt

@@ -44,6 +44,7 @@ source_group("Src" FILES ${lib_srcs})
 
 ocv_warnings_disable(CMAKE_CXX_FLAGS -Wshadow -Wunused -Wsign-compare -Wundef -Wmissing-declarations -Wuninitialized -Wswitch -Wparentheses -Warray-bounds -Wextra
                                      -Wdeprecated-declarations -Wmisleading-indentation -Wdeprecated
+                                     -Wsuggest-override -Winconsistent-missing-override
 )
 ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4018 /wd4099 /wd4100 /wd4101 /wd4127 /wd4189 /wd4245 /wd4305 /wd4389 /wd4512 /wd4701 /wd4702 /wd4706 /wd4800) # vs2005
 ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4334) # vs2005 Win64

3rdparty/protobuf/CMakeLists.txt

@@ -20,6 +20,7 @@ else()
                                        -Wundef -Wtautological-undefined-compare -Wignored-qualifiers -Wextra
                                        -Wunused-function -Wunused-const-variable -Wshorten-64-to-32 -Wno-invalid-offsetof
                                        -Wenum-compare-switch
+                                       -Wsuggest-override -Winconsistent-missing-override
   )
 endif()
 if(CV_ICC)

modules/viz/CMakeLists.txt

@@ -24,7 +24,7 @@ if(NOT BUILD_SHARED_LIBS)
   endif()
 endif()
 
-ocv_warnings_disable(CMAKE_CXX_FLAGS -Winconsistent-missing-override)
+ocv_warnings_disable(CMAKE_CXX_FLAGS -Winconsistent-missing-override -Wsuggest-override)
 
 ocv_define_module(viz opencv_core WRAP python)
 ocv_target_link_libraries(${the_module} LINK_PRIVATE ${VTK_LIBRARIES})