From c007ecda88fc1bdcf20dfda7a9d195bb10f751e2 Mon Sep 17 00:00:00 2001
From: Peter Barker <pbarker@barker.dropbear.id.au>
Date: Fri, 8 Dec 2023 11:03:15 +1100
Subject: [PATCH] AC_AutoTune: add and use header guards

---
 libraries/AC_AutoTune/AC_AutoTune.cpp       | 5 +++++
 libraries/AC_AutoTune/AC_AutoTune.h         | 6 ++++++
 libraries/AC_AutoTune/AC_AutoTune_Heli.cpp  | 6 ++++++
 libraries/AC_AutoTune/AC_AutoTune_Heli.h    | 6 ++++++
 libraries/AC_AutoTune/AC_AutoTune_Multi.cpp | 6 ++++++
 libraries/AC_AutoTune/AC_AutoTune_Multi.h   | 6 ++++++
 libraries/AC_AutoTune/AC_AutoTune_config.h  | 7 +++++++
 7 files changed, 42 insertions(+)
 create mode 100644 libraries/AC_AutoTune/AC_AutoTune_config.h

diff --git a/libraries/AC_AutoTune/AC_AutoTune.cpp b/libraries/AC_AutoTune/AC_AutoTune.cpp
index 1e672f2e32550..3c081f31488f1 100644
--- a/libraries/AC_AutoTune/AC_AutoTune.cpp
+++ b/libraries/AC_AutoTune/AC_AutoTune.cpp
@@ -1,3 +1,7 @@
+#include "AC_AutoTune_config.h"
+
+#if AC_AUTOTUNE_ENABLED
+
 #include "AC_AutoTune.h"
 
 #include <AP_Logger/AP_Logger.h>
@@ -757,3 +761,4 @@ void AC_AutoTune::next_tune_type(TuneType &curr_tune_type, bool reset)
     curr_tune_type = tune_seq[tune_seq_curr];
 }
 
+#endif  // AC_AUTOTUNE_ENABLED
diff --git a/libraries/AC_AutoTune/AC_AutoTune.h b/libraries/AC_AutoTune/AC_AutoTune.h
index e152af499993f..a901b50e06b69 100644
--- a/libraries/AC_AutoTune/AC_AutoTune.h
+++ b/libraries/AC_AutoTune/AC_AutoTune.h
@@ -18,6 +18,10 @@
  */
 #pragma once
 
+#include "AC_AutoTune_config.h"
+
+#if AC_AUTOTUNE_ENABLED
+
 #include <AC_AttitudeControl/AC_AttitudeControl.h>
 #include <AC_AttitudeControl/AC_PosControl.h>
 #include <AP_Math/AP_Math.h>
@@ -327,3 +331,5 @@ class AC_AutoTune
     uint32_t last_pilot_override_warning;
 
 };
+
+#endif  // AC_AUTOTUNE_ENABLED
diff --git a/libraries/AC_AutoTune/AC_AutoTune_Heli.cpp b/libraries/AC_AutoTune/AC_AutoTune_Heli.cpp
index d72a6db6fe4c0..0defc67f67150 100644
--- a/libraries/AC_AutoTune/AC_AutoTune_Heli.cpp
+++ b/libraries/AC_AutoTune/AC_AutoTune_Heli.cpp
@@ -17,6 +17,10 @@
   Converted to a library by Andrew Tridgell, and rewritten to include helicopters by Bill Geyer
  */
 
+#include "AC_AutoTune_config.h"
+
+#if AC_AUTOTUNE_ENABLED
+
 #include "AC_AutoTune_Heli.h"
 
 #include <AP_Logger/AP_Logger.h>
@@ -1941,3 +1945,5 @@ bool AC_AutoTune_Heli::exceeded_freq_range(float frequency)
     }
     return ret;
 }
+
+#endif  // AC_AUTOTUNE_ENABLED
diff --git a/libraries/AC_AutoTune/AC_AutoTune_Heli.h b/libraries/AC_AutoTune/AC_AutoTune_Heli.h
index 6329563b02bae..5da4dc658182e 100644
--- a/libraries/AC_AutoTune/AC_AutoTune_Heli.h
+++ b/libraries/AC_AutoTune/AC_AutoTune_Heli.h
@@ -18,6 +18,10 @@
 
 #pragma once
 
+#include "AC_AutoTune_config.h"
+
+#if AC_AUTOTUNE_ENABLED
+
 #include "AC_AutoTune.h"
 #include <AP_Math/chirp.h>
 #include <GCS_MAVLink/GCS.h>
@@ -296,3 +300,5 @@ class AC_AutoTune_Heli : public AC_AutoTune
 
     Chirp chirp_input;
 };
+
+#endif  // AC_AUTOTUNE_ENABLED
diff --git a/libraries/AC_AutoTune/AC_AutoTune_Multi.cpp b/libraries/AC_AutoTune/AC_AutoTune_Multi.cpp
index bf988c187ae9f..c8ff8cc4114b3 100644
--- a/libraries/AC_AutoTune/AC_AutoTune_Multi.cpp
+++ b/libraries/AC_AutoTune/AC_AutoTune_Multi.cpp
@@ -1,3 +1,7 @@
+#include "AC_AutoTune_config.h"
+
+#if AC_AUTOTUNE_ENABLED
+
 #include "AC_AutoTune_Multi.h"
 
 #include <AP_Logger/AP_Logger.h>
@@ -1246,3 +1250,5 @@ uint32_t AC_AutoTune_Multi::get_testing_step_timeout_ms() const
     return AUTOTUNE_TESTING_STEP_TIMEOUT_MS;
 }
 
+
+#endif  // AC_AUTOTUNE_ENABLED
diff --git a/libraries/AC_AutoTune/AC_AutoTune_Multi.h b/libraries/AC_AutoTune/AC_AutoTune_Multi.h
index b2a02fcdc6bce..c199c18ca2dc9 100644
--- a/libraries/AC_AutoTune/AC_AutoTune_Multi.h
+++ b/libraries/AC_AutoTune/AC_AutoTune_Multi.h
@@ -19,6 +19,10 @@
 
 #pragma once
 
+#include "AC_AutoTune_config.h"
+
+#if AC_AUTOTUNE_ENABLED
+
 #include "AC_AutoTune.h"
 
 class AC_AutoTune_Multi : public AC_AutoTune
@@ -168,3 +172,5 @@ class AC_AutoTune_Multi : public AC_AutoTune
     AP_Float aggressiveness;      // aircraft response aggressiveness to be tuned
     AP_Float min_d;               // minimum rate d gain allowed during tuning
 };
+
+#endif  // AC_AUTOTUNE_ENABLED
diff --git a/libraries/AC_AutoTune/AC_AutoTune_config.h b/libraries/AC_AutoTune/AC_AutoTune_config.h
new file mode 100644
index 0000000000000..ae2b22b712205
--- /dev/null
+++ b/libraries/AC_AutoTune/AC_AutoTune_config.h
@@ -0,0 +1,7 @@
+#pragma once
+
+#include <AP_HAL/AP_HAL_Boards.h>
+
+#ifndef AC_AUTOTUNE_ENABLED
+#define AC_AUTOTUNE_ENABLED 1
+#endif