Modified build process for Kinect support.

Can now be disabled by the DISABLE_KINECT define.
Also better output for users when running qmake.

QGCExternalLibs.pri

@@ -312,23 +312,24 @@ LinuxBuild : contains(MAVLINK_DIALECT, pixhawk) {
 }
 
 #
-# libfreenect Kinect support
+# [OPTIONAL] Kinect support using libfreenect on POSIX systems.
 #
-
-MacBuild | LinuxBuild {
+contains(DEFINES, DISABLE_KINECT) {
+	message("Skipping support for the Kinect (manual override)")
+} else:MacBuild | LinuxBuild {
     exists(/opt/local/include/libfreenect) | exists(/usr/local/include/libfreenect) {
-        message("Including support for libfreenect")
+        message("Including support for the Kinect")
 
         #INCLUDEPATH += /usr/include/libusb-1.0
         DEFINES += QGC_LIBFREENECT_ENABLED
         LIBS += -lfreenect
         HEADERS += src/input/Freenect.h
         SOURCES += src/input/Freenect.cc
     } else {
-        message("Skipping support for libfreenect")
+        warning("Skipping support for the Kinect (missing libraries, see README)")
     }
 } else {
-    message("Skipping support for libfreenect")
+    message("Skipping support for the Kinect (unsupported platform)")
 }
 
 #

README.md

@@ -50,6 +50,11 @@ The OpenSceneGraph libraries provide 3D rendering to the map overlays that QGC c
 
 OpenSceneGraph support is built-in to Mac OS X. On Linux it is commonly available through the libopenscenegraph and libopenscenegraph-qt developer packages. Windows support does not currently exist. This functionality with be automatically built if the proper libraries are installed.
 
+### Kinect support
+Microsoft's Kinect can be used by some autopilots for additional functionality. This is provided by the libfreenect libraries available on the Mac and Linux platforms.
+
+This support is enabled by default and built-in when the appropriate libraries exist. To disable this behavior set the DISABLE_KINECT define when running qmake.
+
 ### XBee support
 QGroundControl can talk to XBee wireless devices using their proprietary protocol directly on Windows and Linux platforms. This support is not necessary if you're not using XBee devices or aren't using their proprietary protocol. On Windows, the necessary dependencies are included in this repository and no additional steps are required. For Linux, change to the `libs/thirdParty/libxbee` folder and run `make;sudo make install` to install libxbee on your system (uninstalling can be done with a `sudo make uninstall`). qmake will automatically detect the library on Linux, so no other work is necessary.