Set MSVC warning level to W3

Author: alxvth

CMakeLists.txt

@@ -21,7 +21,7 @@ set(CMAKE_AUTORCC ON)
 set(CMAKE_AUTOMOC ON)
 
 if(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /DWIN32 /EHsc /MP /permissive- /Zc:__cplusplus")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /DWIN32 /EHsc /W3 /MP /permissive- /Zc:__cplusplus")
     set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /MDd")
     set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} /MD")
     set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /MD")