diff --git a/src/Main/CameraGroup.cxx b/src/Main/CameraGroup.cxx
index 04ab9e135..9ba93143d 100644
--- a/src/Main/CameraGroup.cxx
+++ b/src/Main/CameraGroup.cxx
@@ -298,7 +298,6 @@ CameraInfo* CameraGroup::buildCamera(SGPropertyNode* cameraNode)
     WindowBuilder *wBuild = WindowBuilder::getWindowBuilder();
     const SGPropertyNode* windowNode = cameraNode->getNode("window");
     GraphicsWindow* window = 0;
-    static int cameraNum = 0;
     int cameraFlags = DO_INTERSECTION_TEST;
     if (windowNode) {
         // New style window declaration / definition
@@ -400,7 +399,6 @@ CameraInfo* CameraGroup::buildGUICamera(SGPropertyNode* cameraNode,
     const SGPropertyNode* windowNode = (cameraNode
                                         ? cameraNode->getNode("window")
                                         : 0);
-    static int cameraNum = 0;
     if (!window) {
         if (windowNode) {
             // New style window declaration / definition
diff --git a/src/Main/fg_io.cxx b/src/Main/fg_io.cxx
index 7d904d6f9..3ab62f82d 100644
--- a/src/Main/fg_io.cxx
+++ b/src/Main/fg_io.cxx
@@ -187,7 +187,7 @@ FGIO::parse_port_config( const string& config )
 	    FGRUL *rul = new FGRUL;
 	    io = rul;
         } else if ( protocol == "generic" ) {
-            int configToken;
+            size_t configToken;
             if (tokens[1] == "socket") {
                 configToken = 7;
             } else if (tokens[1] == "file") {
diff --git a/src/Main/fg_os_osgviewer.cxx b/src/Main/fg_os_osgviewer.cxx
index 058e31469..66d2622a8 100644
--- a/src/Main/fg_os_osgviewer.cxx
+++ b/src/Main/fg_os_osgviewer.cxx
@@ -79,9 +79,6 @@ static osg::ref_ptr<osg::Camera> mainCamera;
 
 void fgOSOpenWindow(bool stencil)
 {
-    osg::GraphicsContext::WindowingSystemInterface* wsi
-        = osg::GraphicsContext::getWindowingSystemInterface();
-
     viewer = new osgViewer::Viewer;
     viewer->setDatabasePager(FGScenery::getPagerSingleton());
     CameraGroup* cameraGroup = 0;
diff --git a/src/Main/fgviewer.cxx b/src/Main/fgviewer.cxx
index 08ecdec5a..b1a399e19 100644
--- a/src/Main/fgviewer.cxx
+++ b/src/Main/fgviewer.cxx
@@ -72,8 +72,6 @@ static void dumpOut(osg::Node* node)
     char filename[24];
     static int count = 1;
 
-    FGRenderer *renderer = globals->get_renderer();
-
     while (count < 1000) {
         FILE *fp;
         snprintf(filename, 24, "fgviewer-%03d.osg", count++);
diff --git a/src/Main/globals.cxx b/src/Main/globals.cxx
index 0b550b46c..b73056476 100644
--- a/src/Main/globals.cxx
+++ b/src/Main/globals.cxx
@@ -67,6 +67,9 @@ FGGlobals *globals;
 
 // Constructor
 FGGlobals::FGGlobals() :
+    props( new SGPropertyNode ),
+    initial_state( NULL ),
+    locale( NULL ),
     renderer( new FGRenderer ),
     subsystem_mgr( new SGSubsystemMgr ),
     event_mgr( new SGEventMgr ),
@@ -85,9 +88,6 @@ FGGlobals::FGGlobals() :
     AI_mgr( NULL ),
     controls( NULL ),
     viewmgr( NULL ),
-    props( new SGPropertyNode ),
-    initial_state( NULL ),
-    locale( NULL ),
     commands( SGCommandMgr::instance() ),
     acmodel( NULL ),
     model_mgr( NULL ),
diff --git a/src/Main/options.cxx b/src/Main/options.cxx
index 685d61ff1..26054af82 100644
--- a/src/Main/options.cxx
+++ b/src/Main/options.cxx
@@ -996,7 +996,7 @@ fgOptRandomWind( const char *arg )
 static int
 fgOptWind( const char *arg )
 {
-    double min_hdg, max_hdg, speed, gust;
+    double min_hdg = 0.0, max_hdg = 0.0, speed = 0.0, gust = 0.0;
     if (!parse_wind( arg, &min_hdg, &max_hdg, &speed, &gust)) {
 	SG_LOG( SG_GENERAL, SG_ALERT, "bad wind value " << arg );
 	return FG_OPTIONS_ERROR;
@@ -1815,9 +1815,9 @@ unsigned int getNumMaturity(const char * str)
 {
   // changes should also be reflected in $FG_ROOT/data/options.xml & 
   // $FG_ROOT/data/Translations/string-default.xml
-  const char levels[][20]= {"alpha","beta","early-production","production",0}; 
+  const char* levels[] = {"alpha","beta","early-production","production"}; 
 
-  for (unsigned int i=0; i<(sizeof(levels)/sizeof(levels[0])-1);i++) 
+  for (size_t i=0; i<(sizeof(levels)/sizeof(levels[0]));i++) 
     if (strcmp(str,levels[i])==0)
       return i;
 
diff --git a/src/Main/renderer.cxx b/src/Main/renderer.cxx
index f1458ead5..b222ca0fd 100644
--- a/src/Main/renderer.cxx
+++ b/src/Main/renderer.cxx
@@ -542,9 +542,6 @@ FGRenderer::update( bool refresh_camera_settings ) {
     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
                                   distance_attenuation );
 
-    static const SGPropertyNode *groundlevel_nearplane
-        = fgGetNode("/sim/current-view/ground-level-nearplane-m");
-
     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 
     // update fog params
@@ -766,7 +763,6 @@ bool
 FGRenderer::pick(std::vector<SGSceneryPick>& pickList,
                  const osgGA::GUIEventAdapter* ea)
 {
-    osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
     // wipe out the return ...
     pickList.clear();
     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;