From 4b95ad12bf0e4aa00e364228a6cb5296e5d01372 Mon Sep 17 00:00:00 2001
From: Peter Barker <pbarker@barker.dropbear.id.au>
Date: Wed, 4 May 2022 18:13:29 +1000
Subject: [PATCH] AP_Airspeed: allow backends to be compiled out

---
 libraries/AP_Airspeed/AP_Airspeed.cpp         | 52 +++++++++++--------
 libraries/AP_Airspeed/AP_Airspeed.h           |  8 +--
 libraries/AP_Airspeed/AP_Airspeed_ASP5033.cpp |  5 ++
 libraries/AP_Airspeed/AP_Airspeed_ASP5033.h   | 10 ++++
 libraries/AP_Airspeed/AP_Airspeed_Backend.h   |  2 -
 libraries/AP_Airspeed/AP_Airspeed_DLVR.cpp    |  5 ++
 libraries/AP_Airspeed/AP_Airspeed_DLVR.h      | 10 ++++
 libraries/AP_Airspeed/AP_Airspeed_MS4525.cpp  |  4 ++
 libraries/AP_Airspeed/AP_Airspeed_MS4525.h    | 10 ++++
 libraries/AP_Airspeed/AP_Airspeed_MS5525.cpp  |  4 ++
 libraries/AP_Airspeed/AP_Airspeed_MS5525.h    | 10 ++++
 libraries/AP_Airspeed/AP_Airspeed_MSP.cpp     |  4 +-
 libraries/AP_Airspeed/AP_Airspeed_MSP.h       | 14 +++--
 libraries/AP_Airspeed/AP_Airspeed_NMEA.cpp    |  7 ++-
 libraries/AP_Airspeed/AP_Airspeed_NMEA.h      | 11 ++++
 libraries/AP_Airspeed/AP_Airspeed_SDP3X.cpp   |  5 ++
 libraries/AP_Airspeed/AP_Airspeed_SDP3X.h     | 11 ++++
 libraries/AP_Airspeed/AP_Airspeed_UAVCAN.cpp  |  8 ++-
 libraries/AP_Airspeed/AP_Airspeed_UAVCAN.h    | 11 ++++
 libraries/AP_Airspeed/AP_Airspeed_analog.cpp  |  7 ++-
 libraries/AP_Airspeed/AP_Airspeed_analog.h    | 10 ++++
 21 files changed, 168 insertions(+), 40 deletions(-)

diff --git a/libraries/AP_Airspeed/AP_Airspeed.cpp b/libraries/AP_Airspeed/AP_Airspeed.cpp
index 340bef649b..c8820e5d4a 100644
--- a/libraries/AP_Airspeed/AP_Airspeed.cpp
+++ b/libraries/AP_Airspeed/AP_Airspeed.cpp
@@ -45,15 +45,9 @@
 #include "AP_Airspeed_analog.h"
 #include "AP_Airspeed_ASP5033.h"
 #include "AP_Airspeed_Backend.h"
-#if HAL_ENABLE_LIBUAVCAN_DRIVERS
 #include "AP_Airspeed_UAVCAN.h"
-#endif
-#if APM_BUILD_TYPE(APM_BUILD_Rover) || APM_BUILD_TYPE(APM_BUILD_ArduSub)
 #include "AP_Airspeed_NMEA.h"
-#endif
-#if HAL_MSP_AIRSPEED_ENABLED
 #include "AP_Airspeed_MSP.h"
-#endif
 extern const AP_HAL::HAL &hal;
 
 #ifdef HAL_AIRSPEED_TYPE_DEFAULT
@@ -394,65 +388,79 @@ void AP_Airspeed::init()
             // nothing to do
             break;
         case TYPE_I2C_MS4525:
+#if AP_AIRSPEED_MS4525_ENABLED
             sensor[i] = new AP_Airspeed_MS4525(*this, i);
+#endif
             break;
         case TYPE_ANALOG:
+#if AP_AIRSPEED_ANALOG_ENABLED
             sensor[i] = new AP_Airspeed_Analog(*this, i);
+#endif
             break;
         case TYPE_I2C_MS5525:
+#if AP_AIRSPEED_MS5525_ENABLED
             sensor[i] = new AP_Airspeed_MS5525(*this, i, AP_Airspeed_MS5525::MS5525_ADDR_AUTO);
+#endif
             break;
         case TYPE_I2C_MS5525_ADDRESS_1:
+#if AP_AIRSPEED_MS5525_ENABLED
             sensor[i] = new AP_Airspeed_MS5525(*this, i, AP_Airspeed_MS5525::MS5525_ADDR_1);
+#endif
             break;
         case TYPE_I2C_MS5525_ADDRESS_2:
+#if AP_AIRSPEED_MS5525_ENABLED
             sensor[i] = new AP_Airspeed_MS5525(*this, i, AP_Airspeed_MS5525::MS5525_ADDR_2);
+#endif
             break;
         case TYPE_I2C_SDP3X:
+#if AP_AIRSPEED_SDP3X_ENABLED
             sensor[i] = new AP_Airspeed_SDP3X(*this, i);
+#endif
             break;
         case TYPE_I2C_DLVR_5IN:
-#if !HAL_MINIMIZE_FEATURES
+#if AP_AIRSPEED_DLVR_ENABLED
             sensor[i] = new AP_Airspeed_DLVR(*this, i, 5);
-#endif // !HAL_MINIMIZE_FEATURES
+#endif
             break;
         case TYPE_I2C_DLVR_10IN:
-#if !HAL_MINIMIZE_FEATURES
+#if AP_AIRSPEED_DLVR_ENABLED
             sensor[i] = new AP_Airspeed_DLVR(*this, i, 10);
-#endif // !HAL_MINIMIZE_FEATURES
+#endif
             break;
         case TYPE_I2C_DLVR_20IN:
-#if !HAL_MINIMIZE_FEATURES
+#if AP_AIRSPEED_DLVR_ENABLED
             sensor[i] = new AP_Airspeed_DLVR(*this, i, 20);
-#endif // !HAL_MINIMIZE_FEATURES
+#endif
             break;
         case TYPE_I2C_DLVR_30IN:
-#if !HAL_MINIMIZE_FEATURES
+#if AP_AIRSPEED_DLVR_ENABLED
             sensor[i] = new AP_Airspeed_DLVR(*this, i, 30);
-#endif // !HAL_MINIMIZE_FEATURES
+#endif
             break;
         case TYPE_I2C_DLVR_60IN:
-#if !HAL_MINIMIZE_FEATURES
+#if AP_AIRSPEED_DLVR_ENABLED
             sensor[i] = new AP_Airspeed_DLVR(*this, i, 60);
-#endif // !HAL_MINIMIZE_FEATURES
+#endif  // AP_AIRSPEED_DLVR_ENABLED
             break;
         case TYPE_I2C_ASP5033:
-#if !HAL_MINIMIZE_FEATURES
+#if AP_AIRSPEED_ASP5033_ENABLED
             sensor[i] = new AP_Airspeed_ASP5033(*this, i);
-#endif // !HAL_MINIMIZE_FEATURES
+#endif
             break;
         case TYPE_UAVCAN:
-#if HAL_ENABLE_LIBUAVCAN_DRIVERS
+#if AP_AIRSPEED_UAVCAN_ENABLED
             sensor[i] = AP_Airspeed_UAVCAN::probe(*this, i);
 #endif
             break;
         case TYPE_NMEA_WATER:
+#if AP_AIRSPEED_NMEA_ENABLED
 #if APM_BUILD_TYPE(APM_BUILD_Rover) || APM_BUILD_TYPE(APM_BUILD_ArduSub) 
             sensor[i] = new AP_Airspeed_NMEA(*this, i);
+#endif
 #endif
             break;
         case TYPE_MSP:
-#if HAL_MSP_AIRSPEED_ENABLED
+#if AP_AIRSPEED_MSP_ENABLED
             sensor[i] = new AP_Airspeed_MSP(*this, i, 0);
 #endif
             break;
@@ -657,7 +665,7 @@ void AP_Airspeed::update()
 #endif
 }
 
-#if HAL_MSP_AIRSPEED_ENABLED
+#if AP_AIRSPEED_MSP_ENABLED
 /*
   handle MSP airspeed data
  */
@@ -801,7 +809,7 @@ bool AP_Airspeed::healthy(uint8_t i) const { return false; }
 float AP_Airspeed::get_airspeed(uint8_t i) const { return 0.0; }
 float AP_Airspeed::get_differential_pressure(uint8_t i) const { return 0.0; }
 
-#if HAL_MSP_AIRSPEED_ENABLED
+#if AP_AIRSPEED_MSP_ENABLED
 void AP_Airspeed::handle_msp(const MSP::msp_airspeed_data_message_t &pkt) {}
 #endif
 
diff --git a/libraries/AP_Airspeed/AP_Airspeed.h b/libraries/AP_Airspeed/AP_Airspeed.h
index 2d0336be31..b8015cb670 100644
--- a/libraries/AP_Airspeed/AP_Airspeed.h
+++ b/libraries/AP_Airspeed/AP_Airspeed.h
@@ -11,6 +11,9 @@
 #define AP_AIRSPEED_ENABLED 1
 #endif
 
+#ifndef AP_AIRSPEED_MSP_ENABLED
+#define AP_AIRSPEED_MSP_ENABLED (AP_AIRSPEED_ENABLED && HAL_MSP_SENSORS_ENABLED)
+#endif
 
 class AP_Airspeed_Backend;
 
@@ -22,9 +25,6 @@ class AP_Airspeed_Backend;
 #define AP_AIRSPEED_AUTOCAL_ENABLE AP_AIRSPEED_ENABLED
 #endif
 
-#ifndef HAL_MSP_AIRSPEED_ENABLED
-#define HAL_MSP_AIRSPEED_ENABLED HAL_MSP_SENSORS_ENABLED
-#endif
 class Airspeed_Calibration {
 public:
     friend class AP_Airspeed;
@@ -172,7 +172,7 @@ public:
         return get_corrected_pressure(primary);
     }
 
-#if HAL_MSP_AIRSPEED_ENABLED
+#if AP_AIRSPEED_MSP_ENABLED
     void handle_msp(const MSP::msp_airspeed_data_message_t &pkt);
 #endif
     
diff --git a/libraries/AP_Airspeed/AP_Airspeed_ASP5033.cpp b/libraries/AP_Airspeed/AP_Airspeed_ASP5033.cpp
index f687f72cc1..e727d5924c 100644
--- a/libraries/AP_Airspeed/AP_Airspeed_ASP5033.cpp
+++ b/libraries/AP_Airspeed/AP_Airspeed_ASP5033.cpp
@@ -19,6 +19,9 @@
  */
 
 #include "AP_Airspeed_ASP5033.h"
+
+#if AP_AIRSPEED_ASP5033_ENABLED
+
 #include <AP_HAL/I2CDevice.h>
 
 extern const AP_HAL::HAL &hal;
@@ -174,3 +177,5 @@ bool AP_Airspeed_ASP5033::get_temperature(float &temperature)
 
     return true;
 }
+
+#endif
diff --git a/libraries/AP_Airspeed/AP_Airspeed_ASP5033.h b/libraries/AP_Airspeed/AP_Airspeed_ASP5033.h
index 00aaf6f4c5..99c340ec5b 100644
--- a/libraries/AP_Airspeed/AP_Airspeed_ASP5033.h
+++ b/libraries/AP_Airspeed/AP_Airspeed_ASP5033.h
@@ -14,6 +14,14 @@
  */
 #pragma once
 
+#include <AP_HAL/AP_HAL_Boards.h>
+
+#ifndef AP_AIRSPEED_ASP5033_ENABLED
+#define AP_AIRSPEED_ASP5033_ENABLED AP_AIRSPEED_BACKEND_DEFAULT_ENABLED
+#endif
+
+#if AP_AIRSPEED_ASP5033_ENABLED
+
 /*
   backend driver for airspeed from I2C
  */
@@ -44,3 +52,5 @@ private:
 
     AP_HAL::OwnPtr<AP_HAL::I2CDevice> dev;
 };
+
+#endif  // AP_AIRSPEED_ASP5033_ENABLED
diff --git a/libraries/AP_Airspeed/AP_Airspeed_Backend.h b/libraries/AP_Airspeed/AP_Airspeed_Backend.h
index 9e9c1b6a95..86d1923178 100644
--- a/libraries/AP_Airspeed/AP_Airspeed_Backend.h
+++ b/libraries/AP_Airspeed/AP_Airspeed_Backend.h
@@ -43,9 +43,7 @@ public:
     // return airspeed in m/s if available
     virtual bool get_airspeed(float& airspeed) {return false;}
 
-#if HAL_MSP_AIRSPEED_ENABLED
     virtual void handle_msp(const MSP::msp_airspeed_data_message_t &pkt) {}
-#endif 
 
 protected:
     int8_t get_pin(void) const;
diff --git a/libraries/AP_Airspeed/AP_Airspeed_DLVR.cpp b/libraries/AP_Airspeed/AP_Airspeed_DLVR.cpp
index dcbfed53da..211c36e328 100644
--- a/libraries/AP_Airspeed/AP_Airspeed_DLVR.cpp
+++ b/libraries/AP_Airspeed/AP_Airspeed_DLVR.cpp
@@ -18,6 +18,9 @@
  */
 
 #include "AP_Airspeed_DLVR.h"
+
+#if AP_AIRSPEED_DLVR_ENABLED
+
 #include <AP_Math/AP_Math.h>
 
 extern const AP_HAL::HAL &hal;
@@ -176,3 +179,5 @@ bool AP_Airspeed_DLVR::get_temperature(float &_temperature)
     _temperature = temperature;
     return true;
 }
+
+#endif
diff --git a/libraries/AP_Airspeed/AP_Airspeed_DLVR.h b/libraries/AP_Airspeed/AP_Airspeed_DLVR.h
index 806e2bfeae..2e8bd1a6b9 100644
--- a/libraries/AP_Airspeed/AP_Airspeed_DLVR.h
+++ b/libraries/AP_Airspeed/AP_Airspeed_DLVR.h
@@ -17,6 +17,14 @@
 // backend driver for AllSensors DLVR differential airspeed sensor
 // currently assumes a 5" of water, noise reduced, sensor
 
+#include <AP_HAL/AP_HAL_Boards.h>
+
+#ifndef AP_AIRSPEED_DLVR_ENABLED
+#define AP_AIRSPEED_DLVR_ENABLED AP_AIRSPEED_BACKEND_DEFAULT_ENABLED
+#endif
+
+#if AP_AIRSPEED_DLVR_ENABLED
+
 #include <AP_HAL/AP_HAL.h>
 #include <AP_HAL/utility/OwnPtr.h>
 #include <AP_HAL/I2CDevice.h>
@@ -60,3 +68,5 @@ private:
     
     AP_HAL::OwnPtr<AP_HAL::I2CDevice> dev;
 };
+
+#endif  // AP_AIRSPEED_DLVR_ENABLED
diff --git a/libraries/AP_Airspeed/AP_Airspeed_MS4525.cpp b/libraries/AP_Airspeed/AP_Airspeed_MS4525.cpp
index 7524103110..d6e4c456a3 100644
--- a/libraries/AP_Airspeed/AP_Airspeed_MS4525.cpp
+++ b/libraries/AP_Airspeed/AP_Airspeed_MS4525.cpp
@@ -18,6 +18,8 @@
  */
 #include "AP_Airspeed_MS4525.h"
 
+#if AP_AIRSPEED_MS4525_ENABLED
+
 #include <AP_Common/AP_Common.h>
 #include <AP_HAL/AP_HAL.h>
 #include <AP_HAL/I2CDevice.h>
@@ -282,3 +284,5 @@ bool AP_Airspeed_MS4525::get_temperature(float &temperature)
     temperature = _temperature;
     return true;
 }
+
+#endif  // AP_AIRSPEED_MS4525_ENABLED
diff --git a/libraries/AP_Airspeed/AP_Airspeed_MS4525.h b/libraries/AP_Airspeed/AP_Airspeed_MS4525.h
index be11ebf25d..64ea04fb76 100644
--- a/libraries/AP_Airspeed/AP_Airspeed_MS4525.h
+++ b/libraries/AP_Airspeed/AP_Airspeed_MS4525.h
@@ -14,6 +14,14 @@
  */
 #pragma once
 
+#include <AP_HAL/AP_HAL_Boards.h>
+
+#ifndef AP_AIRSPEED_MS4525_ENABLED
+#define AP_AIRSPEED_MS4525_ENABLED AP_AIRSPEED_BACKEND_DEFAULT_ENABLED
+#endif
+
+#if AP_AIRSPEED_MS4525_ENABLED
+
 /*
   backend driver for airspeed from I2C
  */
@@ -61,3 +69,5 @@ private:
 
     bool probe(uint8_t bus, uint8_t address);
 };
+
+#endif  // AP_AIRSPEED_MS4525_ENABLED
diff --git a/libraries/AP_Airspeed/AP_Airspeed_MS5525.cpp b/libraries/AP_Airspeed/AP_Airspeed_MS5525.cpp
index a23c2a8cdd..811fbbd149 100644
--- a/libraries/AP_Airspeed/AP_Airspeed_MS5525.cpp
+++ b/libraries/AP_Airspeed/AP_Airspeed_MS5525.cpp
@@ -18,6 +18,8 @@
  */
 #include "AP_Airspeed_MS5525.h"
 
+#if AP_AIRSPEED_MS5525_ENABLED
+
 #include <stdio.h>
 #include <utility>
 
@@ -298,3 +300,5 @@ bool AP_Airspeed_MS5525::get_temperature(float &_temperature)
     _temperature = temperature;
     return true;
 }
+
+#endif  // AP_AIRSPEED_MS5525_ENABLED
diff --git a/libraries/AP_Airspeed/AP_Airspeed_MS5525.h b/libraries/AP_Airspeed/AP_Airspeed_MS5525.h
index 08a2eb0379..afa7d448c4 100644
--- a/libraries/AP_Airspeed/AP_Airspeed_MS5525.h
+++ b/libraries/AP_Airspeed/AP_Airspeed_MS5525.h
@@ -18,6 +18,14 @@
   backend driver for airspeed from I2C
  */
 
+#include <AP_HAL/AP_HAL_Boards.h>
+
+#ifndef AP_AIRSPEED_MS5525_ENABLED
+#define AP_AIRSPEED_MS5525_ENABLED AP_AIRSPEED_BACKEND_DEFAULT_ENABLED
+#endif
+
+#if AP_AIRSPEED_MS5525_ENABLED
+
 #include <AP_HAL/AP_HAL.h>
 #include <AP_Param/AP_Param.h>
 #include <AP_HAL/utility/OwnPtr.h>
@@ -76,3 +84,5 @@ private:
     
     AP_HAL::OwnPtr<AP_HAL::I2CDevice> dev;
 };
+
+#endif  // AP_AIRSPEED_MS5525_ENABLED
diff --git a/libraries/AP_Airspeed/AP_Airspeed_MSP.cpp b/libraries/AP_Airspeed/AP_Airspeed_MSP.cpp
index 65a4d6ee4c..cce45fb564 100644
--- a/libraries/AP_Airspeed/AP_Airspeed_MSP.cpp
+++ b/libraries/AP_Airspeed/AP_Airspeed_MSP.cpp
@@ -1,6 +1,6 @@
 #include "AP_Airspeed_MSP.h"
 
-#if HAL_MSP_AIRSPEED_ENABLED
+#if AP_AIRSPEED_MSP_ENABLED
 
 AP_Airspeed_MSP::AP_Airspeed_MSP(AP_Airspeed &_frontend, uint8_t _instance, uint8_t _msp_instance) :
     AP_Airspeed_Backend(_frontend, _instance),
@@ -66,4 +66,4 @@ void AP_Airspeed_MSP::handle_msp(const MSP::msp_airspeed_data_message_t &pkt)
     
 }
 
-#endif // HAL_MSP_AIRSPEED_ENABLED
+#endif // AP_AIRSPEED_MSP_ENABLED
diff --git a/libraries/AP_Airspeed/AP_Airspeed_MSP.h b/libraries/AP_Airspeed/AP_Airspeed_MSP.h
index f0bf4d590f..ac26878ee5 100644
--- a/libraries/AP_Airspeed/AP_Airspeed_MSP.h
+++ b/libraries/AP_Airspeed/AP_Airspeed_MSP.h
@@ -3,9 +3,17 @@
  */
 #pragma once
 
-#include "AP_Airspeed_Backend.h"
+#include <AP_HAL/AP_HAL.h>
+#include <AP_HAL/AP_HAL_Boards.h>
+#include <AP_MSP/msp.h>
 
-#if HAL_MSP_AIRSPEED_ENABLED
+#ifndef AP_AIRSPEED_MSP_ENABLED
+#define AP_AIRSPEED_MSP_ENABLED HAL_MSP_SENSORS_ENABLED
+#endif
+
+#if AP_AIRSPEED_MSP_ENABLED
+
+#include "AP_Airspeed_Backend.h"
 
 class AP_Airspeed_MSP : public AP_Airspeed_Backend
 {
@@ -32,4 +40,4 @@ private:
     uint8_t temp_count;
 };
 
-#endif // HAL_MSP_AIRSPEED_ENABLED
+#endif // AP_AIRSPEED_MSP_ENABLED
diff --git a/libraries/AP_Airspeed/AP_Airspeed_NMEA.cpp b/libraries/AP_Airspeed/AP_Airspeed_NMEA.cpp
index 18698b63a6..cac1c54727 100644
--- a/libraries/AP_Airspeed/AP_Airspeed_NMEA.cpp
+++ b/libraries/AP_Airspeed/AP_Airspeed_NMEA.cpp
@@ -18,10 +18,13 @@
  *   https://gpsd.gitlab.io/gpsd/NMEA.html#_mtw_mean_temperature_of_water
  */
 
+#include "AP_Airspeed_NMEA.h"
+
+#if AP_AIRSPEED_NMEA_ENABLED
+
 #include <AP_Vehicle/AP_Vehicle.h>
 #if APM_BUILD_TYPE(APM_BUILD_Rover) || APM_BUILD_TYPE(APM_BUILD_ArduSub) 
 
-#include "AP_Airspeed_NMEA.h"
 #include "AP_Airspeed.h"
 
 #define TIMEOUT_MS 2000
@@ -218,3 +221,5 @@ bool AP_Airspeed_NMEA::decode_latest_term()
 }
 
 #endif  // APM_BUILD_TYPE(APM_BUILD_Rover) || APM_BUILD_TYPE(APM_BUILD_ArduSub) 
+
+#endif  // AP_AIRSPEED_NMEA_ENABLED
diff --git a/libraries/AP_Airspeed/AP_Airspeed_NMEA.h b/libraries/AP_Airspeed/AP_Airspeed_NMEA.h
index f54f2b2481..47d5ed7b6f 100644
--- a/libraries/AP_Airspeed/AP_Airspeed_NMEA.h
+++ b/libraries/AP_Airspeed/AP_Airspeed_NMEA.h
@@ -1,5 +1,14 @@
 #pragma once
 
+#include <AP_HAL/AP_HAL_Boards.h>
+
+// note additional vehicle restrictions are made in the .cpp file!
+#ifndef AP_AIRSPEED_NMEA_ENABLED
+#define AP_AIRSPEED_NMEA_ENABLED AP_AIRSPEED_BACKEND_DEFAULT_ENABLED
+#endif
+
+#if AP_AIRSPEED_NMEA_ENABLED
+
 #include "AP_Airspeed_Backend.h"
 #include <AP_HAL/AP_HAL.h>
 #include <AP_SerialManager/AP_SerialManager.h>
@@ -65,3 +74,5 @@ private:
     // time last message was received
     uint32_t _last_update_ms;
 };
+
+#endif  // AP_AIRSPEED_NMEA_ENABLED
diff --git a/libraries/AP_Airspeed/AP_Airspeed_SDP3X.cpp b/libraries/AP_Airspeed/AP_Airspeed_SDP3X.cpp
index 8a1438dfc2..616e634c8a 100644
--- a/libraries/AP_Airspeed/AP_Airspeed_SDP3X.cpp
+++ b/libraries/AP_Airspeed/AP_Airspeed_SDP3X.cpp
@@ -19,6 +19,9 @@
   with thanks to https://github.com/PX4/Firmware/blob/master/src/drivers/sdp3x_airspeed
  */
 #include "AP_Airspeed_SDP3X.h"
+
+#if AP_AIRSPEED_SDP3X_ENABLED
+
 #include <GCS_MAVLink/GCS.h>
 #include <AP_Baro/AP_Baro.h>
 
@@ -347,3 +350,5 @@ bool AP_Airspeed_SDP3X::_crc(const uint8_t data[], uint8_t size, uint8_t checksu
     // verify checksum
     return (crc_value == checksum);
 }
+
+#endif  // AP_AIRSPEED_SDP3X_ENABLED
diff --git a/libraries/AP_Airspeed/AP_Airspeed_SDP3X.h b/libraries/AP_Airspeed/AP_Airspeed_SDP3X.h
index be761335c7..6669cd1751 100644
--- a/libraries/AP_Airspeed/AP_Airspeed_SDP3X.h
+++ b/libraries/AP_Airspeed/AP_Airspeed_SDP3X.h
@@ -14,6 +14,14 @@
  */
 #pragma once
 
+#include <AP_HAL/AP_HAL_Boards.h>
+
+#ifndef AP_AIRSPEED_SDP3X_ENABLED
+#define AP_AIRSPEED_SDP3X_ENABLED AP_AIRSPEED_BACKEND_DEFAULT_ENABLED
+#endif
+
+#if AP_AIRSPEED_SDP3X_ENABLED
+
 /*
   backend driver for airspeed from I2C
  */
@@ -63,3 +71,6 @@ private:
 
     AP_HAL::OwnPtr<AP_HAL::I2CDevice> _dev;
 };
+
+
+#endif  // AP_AIRSPEED_SDP3X_ENABLED
diff --git a/libraries/AP_Airspeed/AP_Airspeed_UAVCAN.cpp b/libraries/AP_Airspeed/AP_Airspeed_UAVCAN.cpp
index 9f0300c035..ad478718c6 100644
--- a/libraries/AP_Airspeed/AP_Airspeed_UAVCAN.cpp
+++ b/libraries/AP_Airspeed/AP_Airspeed_UAVCAN.cpp
@@ -1,9 +1,7 @@
-#include <AP_HAL/AP_HAL.h>
-
-#if HAL_ENABLE_LIBUAVCAN_DRIVERS
-
 #include "AP_Airspeed_UAVCAN.h"
 
+#if AP_AIRSPEED_UAVCAN_ENABLED
+
 #include <AP_CANManager/AP_CANManager.h>
 #include <AP_UAVCAN/AP_UAVCAN.h>
 
@@ -163,4 +161,4 @@ bool AP_Airspeed_UAVCAN::get_temperature(float &temperature)
     return true;
 }
 
-#endif // HAL_ENABLE_LIBUAVCAN_DRIVERS
+#endif // AP_AIRSPEED_UAVCAN_ENABLED
diff --git a/libraries/AP_Airspeed/AP_Airspeed_UAVCAN.h b/libraries/AP_Airspeed/AP_Airspeed_UAVCAN.h
index 828a3b2fc8..ce8b861e33 100644
--- a/libraries/AP_Airspeed/AP_Airspeed_UAVCAN.h
+++ b/libraries/AP_Airspeed/AP_Airspeed_UAVCAN.h
@@ -1,5 +1,13 @@
 #pragma once
 
+#include <AP_HAL/AP_HAL_Boards.h>
+
+#ifndef AP_AIRSPEED_UAVCAN_ENABLED
+#define AP_AIRSPEED_UAVCAN_ENABLED HAL_ENABLE_LIBUAVCAN_DRIVERS
+#endif
+
+#if AP_AIRSPEED_UAVCAN_ENABLED
+
 #include "AP_Airspeed_Backend.h"
 
 #include <AP_UAVCAN/AP_UAVCAN.h>
@@ -44,3 +52,6 @@ private:
     static HAL_Semaphore _sem_registry;
     bool _have_temperature;
 };
+
+
+#endif  // AP_AIRSPEED_UAVCAN_ENABLED
diff --git a/libraries/AP_Airspeed/AP_Airspeed_analog.cpp b/libraries/AP_Airspeed/AP_Airspeed_analog.cpp
index cb77817eb8..ffd29087d6 100644
--- a/libraries/AP_Airspeed/AP_Airspeed_analog.cpp
+++ b/libraries/AP_Airspeed/AP_Airspeed_analog.cpp
@@ -16,11 +16,14 @@
  *   analog airspeed driver
  */
 
+#include "AP_Airspeed_analog.h"
+
+#if AP_AIRSPEED_ANALOG_ENABLED
+
 #include <AP_HAL/AP_HAL.h>
 #include <AP_Common/AP_Common.h>
 
 #include "AP_Airspeed.h"
-#include "AP_Airspeed_analog.h"
 
 extern const AP_HAL::HAL &hal;
 
@@ -48,3 +51,5 @@ bool AP_Airspeed_Analog::get_differential_pressure(float &pressure)
     pressure = _source->voltage_average_ratiometric() * VOLTS_TO_PASCAL / get_psi_range();
     return true;
 }
+
+#endif  // AP_AIRSPEED_ANALOG_ENABLED
diff --git a/libraries/AP_Airspeed/AP_Airspeed_analog.h b/libraries/AP_Airspeed/AP_Airspeed_analog.h
index 1131a12ec0..3ee890db48 100644
--- a/libraries/AP_Airspeed/AP_Airspeed_analog.h
+++ b/libraries/AP_Airspeed/AP_Airspeed_analog.h
@@ -1,5 +1,13 @@
 #pragma once
 
+#include <AP_HAL/AP_HAL_Boards.h>
+
+#ifndef AP_AIRSPEED_ANALOG_ENABLED
+#define AP_AIRSPEED_ANALOG_ENABLED AP_AIRSPEED_BACKEND_DEFAULT_ENABLED
+#endif
+
+#if AP_AIRSPEED_ANALOG_ENABLED
+
 #include <AP_HAL/AP_HAL.h>
 #include <AP_Param/AP_Param.h>
 
@@ -22,3 +30,5 @@ public:
 private:
     AP_HAL::AnalogSource *_source;
 };
+
+#endif  // AP_AIRSPEED_ANALOG_ENABLED