From 258f40bce90a11775b35df78d13501e062db4154 Mon Sep 17 00:00:00 2001
From: Simon Arlott <sa.me.uk>
Date: Sat, 28 Sep 2019 15:27:50 +0100
Subject: [PATCH] Mark IO_REG_BASE variables as unused on the ESP8266

Fixes #74.
---
 util/OneWire_direct_gpio.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/util/OneWire_direct_gpio.h b/util/OneWire_direct_gpio.h
index 2110404..fcae4b4 100644
--- a/util/OneWire_direct_gpio.h
+++ b/util/OneWire_direct_gpio.h
@@ -108,7 +108,7 @@
 #define PIN_TO_BASEREG(pin)             ((volatile uint32_t*) GPO)
 #define PIN_TO_BITMASK(pin)             (1UL << (pin))
 #define IO_REG_TYPE uint32_t
-#define IO_REG_BASE_ATTR
+#define IO_REG_BASE_ATTR __attribute__((unused))
 #define IO_REG_MASK_ATTR
 
 static inline __attribute__((always_inline))