disable msvc warnings for paho lib

Author: viacheslauK

external/paho_mqtt_c/CMakeLists.txt

@@ -41,11 +41,13 @@ if (paho_mqtt_c_FETCHED)
             if(TARGET ${tgt})
                 target_compile_definitions("${tgt}" PRIVATE _WINSOCKAPI_ NOMINMAX WIN32_LEAN_AND_MEAN)
                 if(MSVC)
-                    target_compile_options(${tgt} PRIVATE /WX-)
+                    target_compile_options(${tgt} PRIVATE /WX- /W0)
                 endif()
             endif()
         endforeach()
-        target_compile_options(Base64Test PRIVATE /WX-)
-        target_compile_options(Sha1Test PRIVATE /WX-)
+        if(MSVC)
+            target_compile_options(Base64Test PRIVATE /WX- /W0)
+            target_compile_options(Sha1Test PRIVATE /WX- /W0)
+        endif()
     endif()
 endif()