RC_Channel: add and use RC_Channel_config.h

libraries/RC_Channel/RC_Channel.cpp

@@ -17,6 +17,10 @@
  *       RC_Channel.cpp - class for one RC channel input
  */
 
+#include "RC_Channel_config.h"
+
+#if AP_RC_CHANNEL_ENABLED
+
 #include <stdlib.h>
 #include <cmath>
 
@@ -1721,3 +1725,5 @@ void RC_Channels::convert_options(const RC_Channel::aux_func_t old_option, const
         }
     }
 }
+
+#endif  // AP_RC_CHANNEL_ENABLED

libraries/RC_Channel/RC_Channel.h

@@ -2,15 +2,15 @@
 /// @brief	RC_Channel manager, with EEPROM-backed storage of constants.
 #pragma once
 
+#include "RC_Channel_config.h"
+
+#if AP_RC_CHANNEL_ENABLED
+
 #include <AP_Common/AP_Common.h>
 #include <AP_Param/AP_Param.h>
 #include <AP_Math/AP_Math.h>
 #include <AP_Common/Bitmask.h>
 
-#ifndef AP_RC_CHANNEL_AUX_FUNCTION_STRINGS_ENABLED
-#define AP_RC_CHANNEL_AUX_FUNCTION_STRINGS_ENABLED 1
-#endif
-
 #define NUM_RC_CHANNELS 16
 
 /// @class	RC_Channel
@@ -680,3 +680,5 @@ private:
 };
 
 RC_Channels &rc();
+
+#endif  // AP_RC_CHANNEL_ENABLED

libraries/RC_Channel/RC_Channel_config.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#include <AP_HAL/AP_HAL_Boards.h>
+
+#ifndef AP_RC_CHANNEL_ENABLED
+#define AP_RC_CHANNEL_ENABLED 1
+#endif
+
+#ifndef AP_RC_CHANNEL_AUX_FUNCTION_STRINGS_ENABLED
+#define AP_RC_CHANNEL_AUX_FUNCTION_STRINGS_ENABLED AP_RC_CHANNEL_ENABLED
+#endif

libraries/RC_Channel/RC_Channels.cpp

@@ -18,6 +18,10 @@
  *
  */
 
+#include "RC_Channel_config.h"
+
+#if AP_RC_CHANNEL_ENABLED
+
 #include <stdlib.h>
 #include <cmath>
 
@@ -307,3 +311,5 @@ RC_Channels &rc()
 {
     return *RC_Channels::get_singleton();
 }
+
+#endif  // AP_RC_CHANNEL_ENABLED

libraries/RC_Channel/RC_Channels_VarInfo.h

@@ -1,5 +1,9 @@
 #pragma once
 
+#include "RC_Channel_config.h"
+
+#if AP_RC_CHANNEL_ENABLED
+
 #include "RC_Channel.h"
 
 
@@ -109,3 +113,5 @@ const AP_Param::GroupInfo RC_Channels::var_info[] = {
 
     AP_GROUPEND
 };
+
+#endif  // AP_RC_CHANNEL_ENABLED