From 122bee43c61b4e8cd5b340f0f1d1167b119a859e Mon Sep 17 00:00:00 2001
From: "David A. Mellis" <d.mellis@arduino.cc>
Date: Tue, 26 Dec 2006 00:01:31 +0000
Subject: [PATCH] Adding #include <avr/signal.h> to twi.c because the older
 version of avr-libc for Ubuntu Linux 6.06 (Dapper) doesn't define SIGNAL() in
 <avr/interrupt.h>.

---
 targets/libraries/Wire/utility/twi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/targets/libraries/Wire/utility/twi.c b/targets/libraries/Wire/utility/twi.c
index bb49a92f9..dc90b21f9 100644
--- a/targets/libraries/Wire/utility/twi.c
+++ b/targets/libraries/Wire/utility/twi.c
@@ -22,6 +22,7 @@
 #include <inttypes.h>
 #include <avr/io.h>
 #include <avr/interrupt.h>
+#include <avr/signal.h>
 #include <compat/twi.h>
 
 #ifndef cbi