--- wiringPi-72b2af231be337d45a557ce6ca3ed1eeb6675ffd.orig/wiringPi/wiringPi.c	2015-02-10 17:08:20.000000000 +0100
+++ wiringPi-72b2af231be337d45a557ce6ca3ed1eeb6675ffd/wiringPi/wiringPi.c	2015-02-11 09:29:50.028725001 +0100
@@ -51,6 +51,7 @@
 //		Added in the 2 UART pins
 //		Change maxPins to numPins to more accurately reflect purpose
 
+#define _GNU_SOURCE
 
 #include <stdio.h>
 #include <stdarg.h>
