From 72a2962367471c1c0fe7ee6af14b9996bce9ae6b Mon Sep 17 00:00:00 2001
From: Peter Barker <pbarker@barker.dropbear.id.au>
Date: Tue, 6 Jun 2023 18:05:06 +1000
Subject: [PATCH] AP_Relay: add option to disable relay and servorelay
 libraries

---
 libraries/AP_Relay/AP_Relay.cpp      | 5 +++++
 libraries/AP_Relay/AP_Relay.h        | 6 ++++++
 libraries/AP_Relay/AP_Relay_config.h | 7 +++++++
 3 files changed, 18 insertions(+)
 create mode 100644 libraries/AP_Relay/AP_Relay_config.h

diff --git a/libraries/AP_Relay/AP_Relay.cpp b/libraries/AP_Relay/AP_Relay.cpp
index 578ab4fdf5..cb74a23040 100644
--- a/libraries/AP_Relay/AP_Relay.cpp
+++ b/libraries/AP_Relay/AP_Relay.cpp
@@ -7,6 +7,9 @@
 
 #include <AP_HAL/AP_HAL.h>
 #include "AP_Relay.h"
+
+#if AP_RELAY_ENABLED
+
 #include <AP_Logger/AP_Logger.h>
 
 #if CONFIG_HAL_BOARD == HAL_BOARD_SITL
@@ -195,3 +198,5 @@ AP_Relay *relay()
 }
 
 }
+
+#endif  // AP_RELAY_ENABLED
diff --git a/libraries/AP_Relay/AP_Relay.h b/libraries/AP_Relay/AP_Relay.h
index 1baa37a6aa..ef94fe44a7 100644
--- a/libraries/AP_Relay/AP_Relay.h
+++ b/libraries/AP_Relay/AP_Relay.h
@@ -9,6 +9,10 @@
 /// @brief	APM relay control class
 #pragma once
 
+#include "AP_Relay_config.h"
+
+#if AP_RELAY_ENABLED
+
 #include <AP_Param/AP_Param.h>
 
 #define AP_RELAY_NUM_RELAYS 6
@@ -64,3 +68,5 @@ private:
 namespace AP {
     AP_Relay *relay();
 };
+
+#endif  // AP_RELAY_ENABLED
diff --git a/libraries/AP_Relay/AP_Relay_config.h b/libraries/AP_Relay/AP_Relay_config.h
new file mode 100644
index 0000000000..efc3b918f4
--- /dev/null
+++ b/libraries/AP_Relay/AP_Relay_config.h
@@ -0,0 +1,7 @@
+#pragma once
+
+#include <AP_HAL/AP_HAL_Boards.h>
+
+#ifndef AP_RELAY_ENABLED
+#define AP_RELAY_ENABLED 1
+#endif