Add compiler flags (#850)

Fixes #435

src/web/interface/ConnectionBase.h

@@ -68,8 +68,7 @@ public:
      * @param msg The message to send
      * @throws Not supported unless implemented in child classes. Will always throw std::logic_error.
      */
-    virtual void
-    send(std::shared_ptr<std::string> msg)
+    virtual void send(std::shared_ptr<std::string> /* msg */)
     {
         throw std::logic_error("web server can not send the shared payload");
     }