From 33117137e01cd1b80740e38bde2c5c02a966936d Mon Sep 17 00:00:00 2001
From: Martino Facchin <m.facchin@arduino.cc>
Date: Tue, 17 Nov 2020 16:53:37 +0100
Subject: [PATCH] Undefine F and shadow __FlashStringHelper

---
 cores/arduino/Arduino.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/cores/arduino/Arduino.h b/cores/arduino/Arduino.h
index c40dcb20..beeca866 100644
--- a/cores/arduino/Arduino.h
+++ b/cores/arduino/Arduino.h
@@ -26,6 +26,10 @@
 #include <avr/io.h>
 #include <avr/interrupt.h>
 
+#undef F
+#define F(str) (str)
+#define __FlashStringHelper char
+
 #ifdef __cplusplus
 extern "C"{
 #endif