CMake: set windows warning levels globally instead of per target

CMakeLists.txt

@@ -705,43 +705,21 @@ if (WIN32)
         set(WARNINGS "${WARNINGS} /wd${d}")
     endforeach(d)
 
+    set_property(GLOBAL APPEND_STRING PROPERTY COMPILE_FLAGS "${WARNINGS} ${MT_BUILD}")
+
     # boost::wave has a few issues with signed / unsigned conversions, so we suppress those here
     set(SHINY_WARNINGS "${WARNINGS} /wd4245")
     set_target_properties(shiny PROPERTIES COMPILE_FLAGS "${SHINY_WARNINGS} ${MT_BUILD}")
-    set_target_properties(shiny.OgrePlatform PROPERTIES COMPILE_FLAGS "${WARNINGS} ${MT_BUILD}")
-    set_target_properties(sdl4ogre PROPERTIES COMPILE_FLAGS "${WARNINGS} ${MT_BUILD}")
+
     # oics uses tinyxml, which has an initialized but unused variable
     set(OICS_WARNINGS "${WARNINGS} /wd4189")
     set_target_properties(oics PROPERTIES COMPILE_FLAGS "${OICS_WARNINGS} ${MT_BUILD}")
-    set_target_properties(components PROPERTIES COMPILE_FLAGS "${WARNINGS} ${MT_BUILD}")
-    set_target_properties(ogre-ffmpeg-videoplayer PROPERTIES COMPILE_FLAGS "${WARNINGS} ${MT_BUILD}")
-    if (BUILD_MYGUI_PLUGIN)
-        set_target_properties(Plugin_MyGUI_OpenMW_Resources PROPERTIES COMPILE_FLAGS "${WARNINGS} ${MT_BUILD}")
-    endif (BUILD_MYGUI_PLUGIN)
-    if (BUILD_LAUNCHER)
-        set_target_properties(openmw-launcher PROPERTIES COMPILE_FLAGS "${WARNINGS} ${MT_BUILD}")
-    endif (BUILD_LAUNCHER)
-    set_target_properties(openmw PROPERTIES COMPILE_FLAGS "${WARNINGS} ${MT_BUILD}")
-    if (BUILD_BSATOOL)
-        set_target_properties(bsatool PROPERTIES COMPILE_FLAGS "${WARNINGS} ${MT_BUILD}")
-    endif (BUILD_BSATOOL)
-    if (BUILD_ESMTOOL)
-        set_target_properties(esmtool PROPERTIES COMPILE_FLAGS "${WARNINGS} ${MT_BUILD}")
-    endif (BUILD_ESMTOOL)
-    if (BUILD_WIZARD)
-        set_target_properties(openmw-wizard PROPERTIES COMPILE_FLAGS ${WARNINGS})
-    endif (BUILD_WIZARD)
+
     if (BUILD_OPENCS)
         # QT triggers an informational warning that the object layout may differ when compiled with /vd2
         set(OPENCS_WARNINGS "${WARNINGS} ${MT_BUILD} /wd4435")
         set_target_properties(openmw-cs PROPERTIES COMPILE_FLAGS ${OPENCS_WARNINGS})
     endif (BUILD_OPENCS)
-    if (BUILD_ESSIMPORTER)
-        set_target_properties(openmw-essimporter PROPERTIES COMPILE_FLAGS "${WARNINGS} ${MT_BUILD}")
-    endif (BUILD_ESSIMPORTER)
-    if (BUILD_MWINIIMPORTER)
-        set_target_properties(openmw-iniimporter PROPERTIES COMPILE_FLAGS "${WARNINGS} ${MT_BUILD}")
-    endif (BUILD_MWINIIMPORTER)
   endif(MSVC)
 
   # Same for MinGW