CellularConnectionHandler: Generate runtime error if getUDP() is called

__attribute__((error)) not working on virtual functions

Author: pennam

src/Arduino_CellularConnectionHandler.cpp

@@ -40,6 +40,12 @@ unsigned long CellularConnectionHandler::getTime()
   return _cellular.getCellularTime().getUNIXTimestamp();
 }
 
+UDP & CellularConnectionHandler::getUDP()
+{
+  Debug.print(DBG_ERROR, F("CellularConnectionHandler has no UDP support"));
+  while(1) {};
+}
+
 /******************************************************************************
    PROTECTED MEMBER FUNCTIONS
  ******************************************************************************/

src/Arduino_CellularConnectionHandler.h

@@ -18,7 +18,6 @@
 
 #include "Arduino_ConnectionHandler.h"
 
-
 #ifdef BOARD_HAS_CELLULAR /* Only compile if the board has Cellular */
 
 /******************************************************************************
@@ -34,7 +33,7 @@ class CellularConnectionHandler : public ConnectionHandler
 
     virtual unsigned long getTime() override;
     virtual Client & getClient() override { return _gsm_client; };
-    virtual UDP & getUDP() override { } __attribute__((error("CellularConnectionHandler has no UDP support")));
+    virtual UDP & getUDP() override;
 
 
   protected: