AP_Camera: add and use AP_CAMERA_ENABLED

libraries/AP_Camera/AP_Camera.cpp

@@ -1,5 +1,7 @@
 #include "AP_Camera.h"
 
+#if AP_CAMERA_ENABLED
+
 #include <AP_AHRS/AP_AHRS.h>
 #include <AP_Relay/AP_Relay.h>
 #include <AP_Math/AP_Math.h>
@@ -564,3 +566,5 @@ AP_Camera *camera()
 }
 
 }
+
+#endif

libraries/AP_Camera/AP_Camera.h

@@ -2,6 +2,10 @@
 /// @brief	Photo or video camera manager, with EEPROM-backed storage of constants.
 #pragma once
 
+#include "AP_Camera_config.h"
+
+#if AP_CAMERA_ENABLED
+
 #include <AP_Common/Location.h>
 #include <AP_Logger/LogStructure.h>
 #include <AP_Param/AP_Param.h>
@@ -162,3 +166,5 @@ private:
 namespace AP {
 AP_Camera *camera();
 };
+
+#endif

libraries/AP_Camera/AP_Camera_Logging.cpp

@@ -1,4 +1,7 @@
 #include "AP_Camera.h"
+
+#if AP_CAMERA_ENABLED
+
 #include <AP_Logger/AP_Logger.h>
 
 // Write a Camera packet
@@ -53,4 +56,6 @@ void AP_Camera::Write_Camera(uint64_t timestamp_us)
 void AP_Camera::Write_Trigger(void)
 {
     Write_CameraInfo(LOG_TRIGGER_MSG, 0);
-}
+}
+
+#endif

libraries/AP_Camera/AP_Camera_config.h

@@ -0,0 +1,7 @@
+#pragma once
+
+#include <AP_BoardConfig/AP_BoardConfig.h>
+
+#ifndef AP_CAMERA_ENABLED
+#define AP_CAMERA_ENABLED 1
+#endif