From 07abfc59ac6f37bca86352949bbed6bb22f80114 Mon Sep 17 00:00:00 2001
From: Randy Mackay <rmackay9@yahoo.com>
Date: Wed, 14 Aug 2013 11:52:49 +0900
Subject: [PATCH] AP_HAL_PX4: compile error fix

---
 libraries/AP_HAL_PX4/GPIO.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libraries/AP_HAL_PX4/GPIO.cpp b/libraries/AP_HAL_PX4/GPIO.cpp
index 30bbf7d14c..d21d3ca675 100644
--- a/libraries/AP_HAL_PX4/GPIO.cpp
+++ b/libraries/AP_HAL_PX4/GPIO.cpp
@@ -209,10 +209,12 @@ void PX4GPIO::toggle(uint8_t pin)
             ioctl(_tone_alarm_fd, TONE_SET_ALARM, 0);    // Alarm off !! 
             break;
 
+#ifdef CONFIG_ARCH_BOARD_PX4IO_V1
         case PX4_GPIO_EXT_RELAY_PIN: // Ext Relay 
             ioctl(_gpio_fd, GPIO_CLEAR, GPIO_EXT_1);
             ioctl(_gpio_fd, GPIO_SET, GPIO_EXT_1);
             break;
+#endif
     }
 }