ArduCopter: use separate header for version macro

Having the version macro in the config.h and consequently in the main
vehicle header means that whenever the version changes we need to
compiler the whole vehicle again. This would not be so bad if we weren't
also appending the git hash in the version. In this case, whenever we
commit to the repository we would need to recompile everything.

Move to a separate header that is include only by its users. Then
instead of compiling everything we will compile just a few files.

ArduCopter/Copter.cpp

@@ -1,6 +1,5 @@
 /// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
 
-#include "Copter.h"
 /*
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -15,13 +14,16 @@
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-/*
-  constructor for main Copter class
- */
+#include "Copter.h"
+#include "version.h"
 
 const AP_HAL::HAL& hal = AP_HAL::get_HAL();
 
+/*
+  constructor for main Copter class
+ */
 Copter::Copter(void) :
+    DataFlash{FIRMWARE_STRING},
     flight_modes(&g.flight_mode1),
     sonar_enabled(true),
     mission(ahrs, 

ArduCopter/Copter.h

@@ -1,9 +1,4 @@
 /// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
-#pragma once
-
-#define THISFIRMWARE "APM:Copter V3.4-dev"
-#define FIRMWARE_VERSION 3,4,0,FIRMWARE_VERSION_TYPE_DEV
-
 /*
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -18,6 +13,7 @@
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+#pragma once
 /*
   This is the main Copter class
  */
@@ -162,7 +158,7 @@ private:
     RC_Channel *channel_yaw;
 
     // Dataflash
-    DataFlash_Class DataFlash{FIRMWARE_STRING};
+    DataFlash_Class DataFlash;
 
     AP_GPS gps;
 

ArduCopter/GCS_Mavlink.cpp

@@ -1,6 +1,7 @@
 // -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
 
 #include "Copter.h"
+#include "version.h"
 
 // default sensors are present and healthy: gyro, accelerometer, barometer, rate_control, attitude_stabilization, yaw_position, altitude control, x/y position control, motor_control
 #define MAVLINK_SENSOR_PRESENT_DEFAULT (MAV_SYS_STATUS_SENSOR_3D_GYRO | MAV_SYS_STATUS_SENSOR_3D_ACCEL | MAV_SYS_STATUS_SENSOR_ABSOLUTE_PRESSURE | MAV_SYS_STATUS_SENSOR_ANGULAR_RATE_CONTROL | MAV_SYS_STATUS_SENSOR_ATTITUDE_STABILIZATION | MAV_SYS_STATUS_SENSOR_YAW_POSITION | MAV_SYS_STATUS_SENSOR_Z_ALTITUDE_CONTROL | MAV_SYS_STATUS_SENSOR_XY_POSITION_CONTROL | MAV_SYS_STATUS_SENSOR_MOTOR_OUTPUTS | MAV_SYS_STATUS_AHRS)

ArduCopter/Log.cpp

@@ -1,6 +1,7 @@
 // -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
 
 #include "Copter.h"
+#include "version.h"
 
 #if LOGGING_ENABLED == ENABLED
 

ArduCopter/config.h

@@ -671,13 +671,3 @@
 #ifndef FRSKY_TELEM_ENABLED
   #  define FRSKY_TELEM_ENABLED          ENABLED
 #endif
-
-/*
-  build a firmware version string.
-  GIT_VERSION comes from Makefile builds
-*/
-#ifndef GIT_VERSION
-#define FIRMWARE_STRING THISFIRMWARE
-#else
-#define FIRMWARE_STRING THISFIRMWARE " (" GIT_VERSION ")"
-#endif

ArduCopter/system.cpp

@@ -1,6 +1,7 @@
 // -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
 
 #include "Copter.h"
+#include "version.h"
 
 /*****************************************************************************
 *   The init_ardupilot function processes everything we need for an in - air restart

ArduCopter/version.h

@@ -0,0 +1,10 @@
+#pragma once
+
+#define THISFIRMWARE "APM:Copter V3.4-dev"
+#define FIRMWARE_VERSION 3,4,0,FIRMWARE_VERSION_TYPE_DEV
+
+#ifndef GIT_VERSION
+#define FIRMWARE_STRING THISFIRMWARE
+#else
+#define FIRMWARE_STRING THISFIRMWARE " (" GIT_VERSION ")"
+#endif