From 4359a8becd5bfa11904f81c83329411c66c72c2c Mon Sep 17 00:00:00 2001
From: Pieter P <pieter.pas@outlook.com>
Date: Fri, 26 Feb 2021 13:47:07 +0100
Subject: [PATCH] PluggableUSB: make getProductVersion pure virtual

arduino/ArduinoCore-mbed#130
---
 cores/arduino/USB/PluggableUSBDevice.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cores/arduino/USB/PluggableUSBDevice.h b/cores/arduino/USB/PluggableUSBDevice.h
index 561ed74c0..a92bb9693 100644
--- a/cores/arduino/USB/PluggableUSBDevice.h
+++ b/cores/arduino/USB/PluggableUSBDevice.h
@@ -58,7 +58,7 @@ class PluggableUSBModule {
     virtual void callback_set_interface(uint16_t interface, uint8_t alternate);
     virtual void init(EndpointResolver& resolver);
     virtual const uint8_t *string_iinterface_desc();
-    virtual uint8_t getProductVersion();
+    virtual uint8_t getProductVersion() = 0;
 
     uint8_t pluggedInterface;