diff --git a/ground/openpilotgcs/src/libs/opmapcontrol/src/mapwidget/homeitem.cpp b/ground/openpilotgcs/src/libs/opmapcontrol/src/mapwidget/homeitem.cpp
index 6dad1e034..09ef9d497 100644
--- a/ground/openpilotgcs/src/libs/opmapcontrol/src/mapwidget/homeitem.cpp
+++ b/ground/openpilotgcs/src/libs/opmapcontrol/src/mapwidget/homeitem.cpp
@@ -28,7 +28,7 @@
 namespace mapcontrol
 {
     HomeItem::HomeItem(MapGraphicItem* map,OPMapWidget* parent):safe(true),map(map),mapwidget(parent),
-        showsafearea(true),safearea(1000),altitude(0),isDragging(false),toggleRefresh(true)
+        showsafearea(true),toggleRefresh(true),safearea(1000),altitude(0),isDragging(false)
     {
         pic.load(QString::fromUtf8(":/markers/images/home2.svg"));
         pic=pic.scaled(30,30,Qt::IgnoreAspectRatio);
diff --git a/ground/openpilotgcs/src/libs/opmapcontrol/src/mapwidget/opmapwidget.cpp b/ground/openpilotgcs/src/libs/opmapcontrol/src/mapwidget/opmapwidget.cpp
index 30eea862d..2091f5eaf 100644
--- a/ground/openpilotgcs/src/libs/opmapcontrol/src/mapwidget/opmapwidget.cpp
+++ b/ground/openpilotgcs/src/libs/opmapcontrol/src/mapwidget/opmapwidget.cpp
@@ -34,7 +34,7 @@ namespace mapcontrol
 {
 
     OPMapWidget::OPMapWidget(QWidget *parent, Configuration *config):QGraphicsView(parent),configuration(config),UAV(0),GPS(0),Home(0)
-      ,followmouse(true),compass(0),showuav(false),showhome(false),showDiag(false),diagGraphItem(0),diagTimer(0),overlayOpacity(1)
+      ,followmouse(true),compass(0),showuav(false),showhome(false),diagTimer(0),diagGraphItem(0),showDiag(false),overlayOpacity(1)
     {
         setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
         core=new internals::Core;
@@ -392,7 +392,7 @@ namespace mapcontrol
     }
     void OPMapWidget::WPDeleteAll()
     {
-        int x=0;
+//        int x=0;
         foreach(QGraphicsItem* i,map->childItems())
         {
             WayPointItem* w=qgraphicsitem_cast<WayPointItem*>(i);
@@ -419,7 +419,9 @@ namespace mapcontrol
                 }
             }
         }
+        return false;
     }
+
     void OPMapWidget::deleteAllOverlays()
     {
         foreach(QGraphicsItem* i,map->childItems())
diff --git a/ground/openpilotgcs/src/plugins/config/cfg_vehicletypes/configfixedwingwidget.cpp b/ground/openpilotgcs/src/plugins/config/cfg_vehicletypes/configfixedwingwidget.cpp
index 7ed667828..0a2064168 100644
--- a/ground/openpilotgcs/src/plugins/config/cfg_vehicletypes/configfixedwingwidget.cpp
+++ b/ground/openpilotgcs/src/plugins/config/cfg_vehicletypes/configfixedwingwidget.cpp
@@ -291,7 +291,7 @@ bool ConfigFixedWingWidget::setupFrameFixedWing(QString airframeType)
 
     int channel;
     //disable all
-    for (channel=0; channel<VehicleConfig::CHANNEL_NUMELEM; channel++)
+    for (channel=0; (unsigned int) channel<VehicleConfig::CHANNEL_NUMELEM; channel++)
     {
         setMixerType(mixer,channel,VehicleConfig::MIXERTYPE_DISABLED);
         resetMixerVector(mixer, channel);
@@ -371,7 +371,7 @@ bool ConfigFixedWingWidget::setupFrameElevon(QString airframeType)
     int channel;
     double value;
     //disable all
-    for (channel=0; channel<VehicleConfig::CHANNEL_NUMELEM; channel++)
+    for (channel=0; (unsigned int) channel<VehicleConfig::CHANNEL_NUMELEM; channel++)
     {
         setMixerType(mixer,channel,VehicleConfig::MIXERTYPE_DISABLED);
         resetMixerVector(mixer, channel);
@@ -449,7 +449,7 @@ bool ConfigFixedWingWidget::setupFrameVtail(QString airframeType)
     int channel;
     double value;
     //disable all
-    for (channel=0; channel<VehicleConfig::CHANNEL_NUMELEM; channel++)
+    for (channel=0; (unsigned int) channel<VehicleConfig::CHANNEL_NUMELEM; channel++)
     {
         setMixerType(mixer,channel,VehicleConfig::MIXERTYPE_DISABLED);
         resetMixerVector(mixer, channel);
diff --git a/ground/openpilotgcs/src/plugins/config/cfg_vehicletypes/configgroundvehiclewidget.cpp b/ground/openpilotgcs/src/plugins/config/cfg_vehicletypes/configgroundvehiclewidget.cpp
index 2309ed872..1f7ed17d1 100644
--- a/ground/openpilotgcs/src/plugins/config/cfg_vehicletypes/configgroundvehiclewidget.cpp
+++ b/ground/openpilotgcs/src/plugins/config/cfg_vehicletypes/configgroundvehiclewidget.cpp
@@ -239,7 +239,7 @@ QString ConfigGroundVehicleWidget::updateConfigObjectsFromWidgets()
 void ConfigGroundVehicleWidget::refreshWidgetsValues(QString frameType)
 {
 	UAVDataObject*	obj;
-	UAVObjectField *field;
+//	UAVObjectField *field;
 	
     GUIConfigDataUnion config = GetConfigData();
 
@@ -307,7 +307,7 @@ bool ConfigGroundVehicleWidget::setupGroundVehicleMotorcycle(QString airframeTyp
 
     int channel;
     //disable all
-    for (channel=0; channel<VehicleConfig::CHANNEL_NUMELEM; channel++) {
+    for (channel=0; (unsigned int) channel<VehicleConfig::CHANNEL_NUMELEM; channel++) {
         setMixerType(mixer,channel,VehicleConfig::MIXERTYPE_DISABLED);
         resetMixerVector(mixer, channel);
     }
@@ -364,7 +364,7 @@ bool ConfigGroundVehicleWidget::setupGroundVehicleDifferential(QString airframeT
 
     int channel;
     //disable all
-    for (channel=0; channel<VehicleConfig::CHANNEL_NUMELEM; channel++) {
+    for (channel=0; (unsigned int) channel<VehicleConfig::CHANNEL_NUMELEM; channel++) {
         setMixerType(mixer,channel,VehicleConfig::MIXERTYPE_DISABLED);
         resetMixerVector(mixer, channel);
     }
@@ -419,7 +419,7 @@ bool ConfigGroundVehicleWidget::setupGroundVehicleCar(QString airframeType)
 
     int channel;
     //disable all
-    for (channel=0; channel<VehicleConfig::CHANNEL_NUMELEM; channel++) {
+    for (channel=0; (unsigned int) channel<VehicleConfig::CHANNEL_NUMELEM; channel++) {
         setMixerType(mixer,channel,VehicleConfig::MIXERTYPE_DISABLED);
         resetMixerVector(mixer, channel);
     }
diff --git a/ground/openpilotgcs/src/plugins/config/cfg_vehicletypes/configmultirotorwidget.cpp b/ground/openpilotgcs/src/plugins/config/cfg_vehicletypes/configmultirotorwidget.cpp
index bfa4fe7a2..30b45ecde 100644
--- a/ground/openpilotgcs/src/plugins/config/cfg_vehicletypes/configmultirotorwidget.cpp
+++ b/ground/openpilotgcs/src/plugins/config/cfg_vehicletypes/configmultirotorwidget.cpp
@@ -971,7 +971,7 @@ bool ConfigMultiRotorWidget::setupMultiRotorMixer(double mixerFactors[8][3])
     Q_ASSERT(mixer);
 
     //disable all
-    for (int channel=0; channel<VehicleConfig::CHANNEL_NUMELEM; channel++)
+    for (unsigned int channel=0; channel<VehicleConfig::CHANNEL_NUMELEM; channel++)
     {
         setMixerType(mixer,channel,VehicleConfig::MIXERTYPE_DISABLED);
         resetMixerVector(mixer, channel);
diff --git a/ground/openpilotgcs/src/plugins/config/configoutputwidget.cpp b/ground/openpilotgcs/src/plugins/config/configoutputwidget.cpp
index 9b3e6e01b..4f6baaf8e 100644
--- a/ground/openpilotgcs/src/plugins/config/configoutputwidget.cpp
+++ b/ground/openpilotgcs/src/plugins/config/configoutputwidget.cpp
@@ -231,7 +231,7 @@ void ConfigOutputWidget::refreshWidgetsValues(UAVObject * obj)
 {
     Q_UNUSED(obj);
 
-    bool dirty=isDirty();
+//    bool dirty=isDirty();
 
     // Get Actuator Settings
     ActuatorSettings *actuatorSettings = ActuatorSettings::GetInstance(getObjectManager());
diff --git a/ground/openpilotgcs/src/plugins/config/configrevowidget.cpp b/ground/openpilotgcs/src/plugins/config/configrevowidget.cpp
index 77cbeb5db..f5c19a8af 100644
--- a/ground/openpilotgcs/src/plugins/config/configrevowidget.cpp
+++ b/ground/openpilotgcs/src/plugins/config/configrevowidget.cpp
@@ -68,8 +68,8 @@ public:
 ConfigRevoWidget::ConfigRevoWidget(QWidget *parent) :
     ConfigTaskWidget(parent),
     collectingData(false),
-    position(-1),
-    m_ui(new Ui_RevoSensorsWidget())
+    m_ui(new Ui_RevoSensorsWidget()),
+    position(-1)
 {
     m_ui->setupUi(this);
 
diff --git a/ground/openpilotgcs/src/plugins/config/configvehicletypewidget.cpp b/ground/openpilotgcs/src/plugins/config/configvehicletypewidget.cpp
index 1a765a381..53e949c1e 100644
--- a/ground/openpilotgcs/src/plugins/config/configvehicletypewidget.cpp
+++ b/ground/openpilotgcs/src/plugins/config/configvehicletypewidget.cpp
@@ -109,7 +109,7 @@ ConfigVehicleTypeWidget::ConfigVehicleTypeWidget(QWidget *parent) : ConfigTaskWi
 
     //Generate lists of mixerTypeNames, mixerVectorNames, channelNames
     channelNames << "None";
-    for (int i = 0; i < ActuatorSettings::CHANNELADDR_NUMELEM; i++) {
+    for (unsigned int i = 0; i < ActuatorSettings::CHANNELADDR_NUMELEM; i++) {
 
         mixerTypes << QString("Mixer%1Type").arg(i+1);
         mixerVectors << QString("Mixer%1Vector").arg(i+1);
diff --git a/ground/openpilotgcs/src/plugins/gpsdisplay/telemetryparser.cpp b/ground/openpilotgcs/src/plugins/gpsdisplay/telemetryparser.cpp
index e08d2be52..b0db7f291 100644
--- a/ground/openpilotgcs/src/plugins/gpsdisplay/telemetryparser.cpp
+++ b/ground/openpilotgcs/src/plugins/gpsdisplay/telemetryparser.cpp
@@ -117,7 +117,7 @@ void TelemetryParser::updateSats( UAVObject* object1) {
     UAVObjectField* azimuth = object1->getField(QString("Azimuth"));
     UAVObjectField* snr = object1->getField(QString("SNR"));
 
-    for (int i=0;i< prn->getNumElements();i++) {
+    for (unsigned int i=0;i< prn->getNumElements();i++) {
         emit satellite(i,prn->getValue(i).toInt(),elevation->getValue(i).toInt(),
                        azimuth->getValue(i).toInt(), snr->getValue(i).toInt());
     }
diff --git a/ground/openpilotgcs/src/plugins/ipconnection/ipconnectionplugin.cpp b/ground/openpilotgcs/src/plugins/ipconnection/ipconnectionplugin.cpp
index 5d166584c..78a056378 100644
--- a/ground/openpilotgcs/src/plugins/ipconnection/ipconnectionplugin.cpp
+++ b/ground/openpilotgcs/src/plugins/ipconnection/ipconnectionplugin.cpp
@@ -73,7 +73,7 @@ void IPConnection::onOpenDevice(QString HostName, int Port, bool UseTCP)
 {
     QAbstractSocket *ipSocket;
     const int Timeout = 5 * 1000;
-    int state;
+//    int state;
 
     ipConMutex.lock();
     if (UseTCP) {
diff --git a/ground/openpilotgcs/src/plugins/opmap/flightdatamodel.cpp b/ground/openpilotgcs/src/plugins/opmap/flightdatamodel.cpp
index 04bcdd93c..4bf2f664e 100644
--- a/ground/openpilotgcs/src/plugins/opmap/flightdatamodel.cpp
+++ b/ground/openpilotgcs/src/plugins/opmap/flightdatamodel.cpp
@@ -169,6 +169,7 @@ bool flightDataModel::setColumnByIndex(pathPlanData  *row,const int index,const
     default:
         return false;
     }
+    return false;
 }
 QVariant flightDataModel::getColumnByIndex(const pathPlanData *row,const int index) const
 {
diff --git a/ground/openpilotgcs/src/plugins/opmap/opmapgadgetwidget.cpp b/ground/openpilotgcs/src/plugins/opmap/opmapgadgetwidget.cpp
index b5fb5b273..2d8e01506 100644
--- a/ground/openpilotgcs/src/plugins/opmap/opmapgadgetwidget.cpp
+++ b/ground/openpilotgcs/src/plugins/opmap/opmapgadgetwidget.cpp
@@ -1773,7 +1773,7 @@ void OPMapGadgetWidget::onAddWayPointAct_triggered(internals::PointLatLng coord)
 
     if (m_map_mode != Normal_MapMode)
         return;
-    float alt=15;
+
     mapProxy->createWayPoint(coord);
 }
 
diff --git a/ground/openpilotgcs/src/plugins/rawhid/pjrc_rawhid_mac.cpp b/ground/openpilotgcs/src/plugins/rawhid/pjrc_rawhid_mac.cpp
index 382c43829..b490f5ddc 100644
--- a/ground/openpilotgcs/src/plugins/rawhid/pjrc_rawhid_mac.cpp
+++ b/ground/openpilotgcs/src/plugins/rawhid/pjrc_rawhid_mac.cpp
@@ -315,7 +315,7 @@ int pjrc_rawhid::send(int num, void *buf, int len, int timeout)
 
 QString pjrc_rawhid::getserial(int num) {
     hid_t *hid;
-    char buf[128];
+//    char buf[128];
 
     hid = get_hid(num);
 
diff --git a/ground/openpilotgcs/src/plugins/rawhid/usbmonitor_mac.cpp b/ground/openpilotgcs/src/plugins/rawhid/usbmonitor_mac.cpp
index 51fd6cce7..3e661c598 100644
--- a/ground/openpilotgcs/src/plugins/rawhid/usbmonitor_mac.cpp
+++ b/ground/openpilotgcs/src/plugins/rawhid/usbmonitor_mac.cpp
@@ -45,8 +45,8 @@ static bool HID_GetStrProperty(IOHIDDeviceRef dev, CFStringRef property, QString
   */
 USBMonitor::USBMonitor(QObject *parent): QThread(parent) {
     hid_manager=NULL;
-    CFMutableDictionaryRef dict;
-    CFNumberRef num;
+//    CFMutableDictionaryRef dict;
+//    CFNumberRef num;
     IOReturn ret;
 
     m_instance = this;
@@ -131,7 +131,7 @@ void USBMonitor::attach_callback(void *context, IOReturn r, void *hid_mgr, IOHID
 {
     bool got_properties = true;
 
-    CFTypeRef prop;
+//    CFTypeRef prop;
     USBPortInfo deviceInfo;
 
     deviceInfo.dev_handle = dev;
diff --git a/ground/openpilotgcs/src/plugins/uavobjectutil/uavobjectutilmanager.cpp b/ground/openpilotgcs/src/plugins/uavobjectutil/uavobjectutilmanager.cpp
index be81befb7..1c69c63e9 100644
--- a/ground/openpilotgcs/src/plugins/uavobjectutil/uavobjectutilmanager.cpp
+++ b/ground/openpilotgcs/src/plugins/uavobjectutil/uavobjectutilmanager.cpp
@@ -268,7 +268,7 @@ QByteArray UAVObjectUtilManager::getBoardCPUSerial()
     QByteArray cpuSerial;
     FirmwareIAPObj::DataFields firmwareIapData = getFirmwareIap();
 
-    for (int i = 0; i < FirmwareIAPObj::CPUSERIAL_NUMELEM; i++)
+    for (unsigned int i = 0; i < FirmwareIAPObj::CPUSERIAL_NUMELEM; i++)
         cpuSerial.append(firmwareIapData.CPUSerial[i]);
 
     return cpuSerial;
@@ -288,7 +288,7 @@ QByteArray UAVObjectUtilManager::getBoardDescription()
     QByteArray ret;
     FirmwareIAPObj::DataFields firmwareIapData = getFirmwareIap();
 
-    for (int i = 0; i < FirmwareIAPObj::DESCRIPTION_NUMELEM; i++)
+    for (unsigned int i = 0; i < FirmwareIAPObj::DESCRIPTION_NUMELEM; i++)
         ret.append(firmwareIapData.Description[i]);
 
     return ret;
diff --git a/ground/openpilotgcs/src/plugins/uavobjectwidgetutils/configtaskwidget.cpp b/ground/openpilotgcs/src/plugins/uavobjectwidgetutils/configtaskwidget.cpp
index 594063358..1d711c0d8 100644
--- a/ground/openpilotgcs/src/plugins/uavobjectwidgetutils/configtaskwidget.cpp
+++ b/ground/openpilotgcs/src/plugins/uavobjectwidgetutils/configtaskwidget.cpp
@@ -32,7 +32,7 @@
 /**
  * Constructor
  */
-ConfigTaskWidget::ConfigTaskWidget(QWidget *parent) : QWidget(parent),isConnected(false),smartsave(NULL),dirty(false),outOfLimitsStyle("background-color: rgb(255, 0, 0);"),timeOut(NULL),allowWidgetUpdates(true)
+ConfigTaskWidget::ConfigTaskWidget(QWidget *parent) : QWidget(parent),isConnected(false),allowWidgetUpdates(true),smartsave(NULL),dirty(false),outOfLimitsStyle("background-color: rgb(255, 0, 0);"),timeOut(NULL)
 {
     pm = ExtensionSystem::PluginManager::instance();
     objManager = pm->getObject<UAVObjectManager>();
diff --git a/ground/openpilotgcs/src/plugins/uavtalk/uavtalk.cpp b/ground/openpilotgcs/src/plugins/uavtalk/uavtalk.cpp
index e1aa5ecf6..137fd4dc3 100644
--- a/ground/openpilotgcs/src/plugins/uavtalk/uavtalk.cpp
+++ b/ground/openpilotgcs/src/plugins/uavtalk/uavtalk.cpp
@@ -457,7 +457,7 @@ bool UAVTalk::processInputByte(quint8 rxbyte)
         default:
             rxState = STATE_SYNC;
             stats.rxErrors++;
-            UAVTALK_QXTLOG_DEBUG("UAVTalk: ???->Sync");
+            UAVTALK_QXTLOG_DEBUG("UAVTalk: \?\?\?->Sync"); //Use the escape character for '?' so that the tripgraph isn't triggered.
     }
 
     // Done
diff --git a/ground/openpilotgcs/src/plugins/uploader/SSP/port.h b/ground/openpilotgcs/src/plugins/uploader/SSP/port.h
index ff4725b99..1521ab412 100644
--- a/ground/openpilotgcs/src/plugins/uploader/SSP/port.h
+++ b/ground/openpilotgcs/src/plugins/uploader/SSP/port.h
@@ -43,7 +43,7 @@ public:
     uint8_t 	maxRetryCount;					// max. times to try to transmit the 'send' packet
     uint16_t 	max_retry;                             	// Maximum number of retrys for a single transmit.
     int32_t 	timeoutLen;						// how long to wait for each retry to succeed
-    int32_t		timeout;						// current timeout. when 'time' reaches this point we have timed out
+    uint32_t		timeout;						// current timeout. when 'time' reaches this point we have timed out
     uint8_t 	txSeqNo; 						// current 'send' packet sequence number
     uint16_t 	rxBufPos;						//  current buffer position in the receive packet
     uint16_t	rxBufLen;						// number of 'data' bytes in the buffer