diff --git a/apps/openmw/mwgui/dialogue.hpp b/apps/openmw/mwgui/dialogue.hpp
index 97a0e8b37..5e362e9b5 100644
--- a/apps/openmw/mwgui/dialogue.hpp
+++ b/apps/openmw/mwgui/dialogue.hpp
@@ -155,8 +155,6 @@ namespace MWGui
         void restock();
         void deleteLater();
 
-        bool mEnabled;
-
         bool mIsCompanion;
         std::list<std::string> mKeywords;
 
diff --git a/apps/openmw/mwgui/hud.cpp b/apps/openmw/mwgui/hud.cpp
index 1db2691f4..23eb499de 100644
--- a/apps/openmw/mwgui/hud.cpp
+++ b/apps/openmw/mwgui/hud.cpp
@@ -80,7 +80,6 @@ namespace MWGui
         , mSpellStatus(NULL)
         , mEffectBox(NULL)
         , mMinimap(NULL)
-        , mCompass(NULL)
         , mCrosshair(NULL)
         , mCellNameBox(NULL)
         , mDrowningFrame(NULL)
diff --git a/apps/openmw/mwgui/hud.hpp b/apps/openmw/mwgui/hud.hpp
index 3542f3ebf..73428c034 100644
--- a/apps/openmw/mwgui/hud.hpp
+++ b/apps/openmw/mwgui/hud.hpp
@@ -69,7 +69,6 @@ namespace MWGui
         MyGUI::Widget *mEffectBox, *mMinimapBox;
         MyGUI::Button* mMinimapButton;
         MyGUI::ScrollView* mMinimap;
-        MyGUI::ImageBox* mCompass;
         MyGUI::ImageBox* mCrosshair;
         MyGUI::TextBox* mCellNameBox;
         MyGUI::TextBox* mWeaponSpellBox;
diff --git a/apps/openmw/mwgui/spellbuyingwindow.hpp b/apps/openmw/mwgui/spellbuyingwindow.hpp
index 649aab3f2..3414c1b94 100644
--- a/apps/openmw/mwgui/spellbuyingwindow.hpp
+++ b/apps/openmw/mwgui/spellbuyingwindow.hpp
@@ -46,7 +46,7 @@ namespace MWGui
             void onMouseWheel(MyGUI::Widget* _sender, int _rel);
             void addSpell(const ESM::Spell& spell);
             void clearSpells();
-            int mLastPos,mCurrentY;
+            int mCurrentY;
 
             static const int sLineHeight;
 
diff --git a/apps/openmw/mwgui/statswindow.cpp b/apps/openmw/mwgui/statswindow.cpp
index bf505b00f..d3d487579 100644
--- a/apps/openmw/mwgui/statswindow.cpp
+++ b/apps/openmw/mwgui/statswindow.cpp
@@ -105,7 +105,7 @@ namespace MWGui
 
         std::stringstream out;
         out << val << "/" << max;
-        setText(tname, out.str().c_str());
+        setText(tname, out.str());
 
         pt->setProgressRange(std::max(0, max));
         pt->setProgressPosition(std::max(0, val));
diff --git a/apps/openmw/mwmechanics/aiwander.cpp b/apps/openmw/mwmechanics/aiwander.cpp
index 7f412b4d2..255874d88 100644
--- a/apps/openmw/mwmechanics/aiwander.cpp
+++ b/apps/openmw/mwmechanics/aiwander.cpp
@@ -451,11 +451,10 @@ namespace MWMechanics
         // Check if an idle actor is  too close to a door - if so start walking
         storage.mDoorCheckDuration += duration;
 
-        static float distance = MWBase::Environment::get().getWorld()->getMaxActivationDistance();
-
         if (storage.mDoorCheckDuration >= DOOR_CHECK_INTERVAL)
         {
             storage.mDoorCheckDuration = 0;    // restart timer
+            static float distance = MWBase::Environment::get().getWorld()->getMaxActivationDistance();
             if (mDistance &&            // actor is not intended to be stationary
                 proximityToDoor(actor, distance*1.6f))
             {
@@ -531,11 +530,10 @@ namespace MWMechanics
 
     void AiWander::evadeObstacles(const MWWorld::Ptr& actor, AiWanderStorage& storage, float duration, ESM::Position& pos)
     {
-        static float distance = MWBase::Environment::get().getWorld()->getMaxActivationDistance();
-
         if (mObstacleCheck.isEvading())
         {
             // first check if we're walking into a door
+            static float distance = MWBase::Environment::get().getWorld()->getMaxActivationDistance();
             if (proximityToDoor(actor, distance))
             {
                 // remove allowed points then select another random destination
diff --git a/apps/openmw/mwmechanics/combat.cpp b/apps/openmw/mwmechanics/combat.cpp
index 54ad75135..13cd4232d 100644
--- a/apps/openmw/mwmechanics/combat.cpp
+++ b/apps/openmw/mwmechanics/combat.cpp
@@ -424,26 +424,6 @@ namespace MWMechanics
         }
     }
 
-    bool isEnvironmentCompatible(const MWWorld::Ptr& attacker, const MWWorld::Ptr& victim)
-    {
-        const MWWorld::Class& attackerClass = attacker.getClass();
-        MWBase::World* world = MWBase::Environment::get().getWorld();
-
-        // If attacker is fish, victim must be in water
-        if (attackerClass.isPureWaterCreature(attacker))
-        {
-            return world->isWading(victim);
-        }
-        
-        // If attacker can't swim, victim must not be in water
-        if (!attackerClass.canSwim(attacker))
-        {
-            return !world->isSwimming(victim);
-        }
-
-        return true;
-    }
-
     float getFightDistanceBias(const MWWorld::Ptr& actor1, const MWWorld::Ptr& actor2)
     {
         osg::Vec3f pos1 (actor1.getRefData().getPosition().asVec3());
diff --git a/apps/openmw/mwmechanics/combat.hpp b/apps/openmw/mwmechanics/combat.hpp
index 12961dc4b..8b93ca204 100644
--- a/apps/openmw/mwmechanics/combat.hpp
+++ b/apps/openmw/mwmechanics/combat.hpp
@@ -39,10 +39,6 @@ void getHandToHandDamage (const MWWorld::Ptr& attacker, const MWWorld::Ptr& vict
 /// Apply the fatigue loss incurred by attacking with the given weapon (weapon may be empty = hand-to-hand)
 void applyFatigueLoss(const MWWorld::Ptr& attacker, const MWWorld::Ptr& weapon, float attackStrength);
 
-/// Can attacker operate in victim's environment?
-/// e.g. If attacker is a fish, is victim in water? Or, if attacker can't swim, is victim on land?
-bool isEnvironmentCompatible(const MWWorld::Ptr& attacker, const MWWorld::Ptr& victim);
-
 float getFightDistanceBias(const MWWorld::Ptr& actor1, const MWWorld::Ptr& actor2);
 }
 
diff --git a/apps/openmw/mwphysics/physicssystem.cpp b/apps/openmw/mwphysics/physicssystem.cpp
index 7f880d716..34932e360 100644
--- a/apps/openmw/mwphysics/physicssystem.cpp
+++ b/apps/openmw/mwphysics/physicssystem.cpp
@@ -702,8 +702,6 @@ namespace MWPhysics
         const char* env = getenv("OPENMW_PHYSICS_FPS");
         if (env)
         {
-            std::string str(env);
-
             float physFramerate = std::atof(env);
             if (physFramerate > 0)
             {
diff --git a/components/nifbullet/bulletnifloader.cpp b/components/nifbullet/bulletnifloader.cpp
index 3865b17a5..9e9fe3759 100644
--- a/components/nifbullet/bulletnifloader.cpp
+++ b/components/nifbullet/bulletnifloader.cpp
@@ -49,7 +49,7 @@ BulletNifLoader::~BulletNifLoader()
 {
 }
 
-osg::ref_ptr<Resource::BulletShape> BulletNifLoader::load(const Nif::NIFFilePtr nif)
+osg::ref_ptr<Resource::BulletShape> BulletNifLoader::load(const Nif::NIFFilePtr& nif)
 {
     mShape = new Resource::BulletShape;
 
diff --git a/components/nifbullet/bulletnifloader.hpp b/components/nifbullet/bulletnifloader.hpp
index a30bf8fdf..fff51933f 100644
--- a/components/nifbullet/bulletnifloader.hpp
+++ b/components/nifbullet/bulletnifloader.hpp
@@ -50,7 +50,7 @@ public:
         abort();
     }
 
-    osg::ref_ptr<Resource::BulletShape> load(const Nif::NIFFilePtr file);
+    osg::ref_ptr<Resource::BulletShape> load(const Nif::NIFFilePtr& file);
 
 private:
     bool findBoundingBox(const Nif::Node* node, int flags = 0);
diff --git a/components/nifosg/nifloader.cpp b/components/nifosg/nifloader.cpp
index 8810f171a..a3b81338e 100644
--- a/components/nifosg/nifloader.cpp
+++ b/components/nifosg/nifloader.cpp
@@ -1191,8 +1191,8 @@ namespace NifOsg
             if (pixelData->mipmaps.empty())
                 return NULL;
 
-            unsigned int width = 0;
-            unsigned int height = 0;
+            int width = 0;
+            int height = 0;
 
             std::vector<unsigned int> mipmapVector;
             for (unsigned int i=0; i<pixelData->mipmaps.size()-3; ++i)
diff --git a/components/resource/bulletshapemanager.cpp b/components/resource/bulletshapemanager.cpp
index 53b08b8be..a3d09311a 100644
--- a/components/resource/bulletshapemanager.cpp
+++ b/components/resource/bulletshapemanager.cpp
@@ -63,7 +63,7 @@ class NodeToShapeVisitor : public osg::NodeVisitor
 public:
     NodeToShapeVisitor()
         : osg::NodeVisitor(TRAVERSE_ALL_CHILDREN)
-        , mTriangleMesh(NULL)
+        , mTriangleMesh(nullptr)
     {
 
     }
@@ -71,11 +71,11 @@ public:
     virtual void apply(osg::Drawable &drawable)
     {
         if (!mTriangleMesh)
-            mTriangleMesh = new btTriangleMesh;
+            mTriangleMesh.reset(new btTriangleMesh);
 
         osg::Matrixf worldMat = osg::computeLocalToWorld(getNodePath());
         osg::TriangleFunctor<GetTriangleFunctor> functor;
-        functor.setTriMesh(mTriangleMesh);
+        functor.setTriMesh(mTriangleMesh.get());
         functor.setMatrix(worldMat);
         drawable.accept(functor);
     }
@@ -86,14 +86,12 @@ public:
             return osg::ref_ptr<BulletShape>();
 
         osg::ref_ptr<BulletShape> shape (new BulletShape);
-        TriangleMeshShape* meshShape = new TriangleMeshShape(mTriangleMesh, true);
-        shape->mCollisionShape = meshShape;
-        mTriangleMesh = NULL;
+        shape->mCollisionShape = new TriangleMeshShape(mTriangleMesh.release(), true);
         return shape;
     }
 
 private:
-    btTriangleMesh* mTriangleMesh;
+    std::unique_ptr<btTriangleMesh> mTriangleMesh;
 };
 
 BulletShapeManager::BulletShapeManager(const VFS::Manager* vfs, SceneManager* sceneMgr, NifFileManager* nifFileManager)
diff --git a/components/sceneutil/util.cpp b/components/sceneutil/util.cpp
index 3add3bb23..eec302965 100644
--- a/components/sceneutil/util.cpp
+++ b/components/sceneutil/util.cpp
@@ -42,13 +42,4 @@ osg::Vec4f colourFromRGB(unsigned int clr)
     return colour;
 }
 
-osg::Vec4f colourFromRGBA(unsigned int clr)
-{
-    osg::Vec4f colour(((clr >> 0) & 0xFF) / 255.0f,
-                      ((clr >> 8) & 0xFF) / 255.0f,
-                      ((clr >> 16) & 0xFF) / 255.0f,
-                      ((clr >> 24) & 0xFF) / 255.0f);
-    return colour;
-}
-
 }
diff --git a/components/sceneutil/util.hpp b/components/sceneutil/util.hpp
index d8fefdb29..109099740 100644
--- a/components/sceneutil/util.hpp
+++ b/components/sceneutil/util.hpp
@@ -15,8 +15,6 @@ namespace SceneUtil
 
     osg::Vec4f colourFromRGB (unsigned int clr);
 
-    osg::Vec4f colourFromRGBA (unsigned int clr);
-
 }
 
 #endif
diff --git a/components/sceneutil/workqueue.cpp b/components/sceneutil/workqueue.cpp
index cc40506f0..2cd1ec806 100644
--- a/components/sceneutil/workqueue.cpp
+++ b/components/sceneutil/workqueue.cpp
@@ -119,6 +119,7 @@ unsigned int WorkQueue::getNumActiveThreads() const
 
 WorkThread::WorkThread(WorkQueue *workQueue)
     : mWorkQueue(workQueue)
+    , mActive(false)
 {
 }