diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 77977db9b..848eb8d3e 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -656,13 +656,6 @@ else()
 		set(RELEASE_WARNING_FLAGS "")
 	endif()
 
-	if(NOT APPLE AND NOT "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
-		CHECK_CXX_COMPILER_FLAG("-Wno-unused-but-set-variable" HAS_UNUSED_BUT_SET_VARIABLE_WARNING)
-		if(HAS_UNUSED_BUT_SET_VARIABLE_WARNING)
-			set(WARNING_FLAGS "${WARNING_FLAGS} -Wno-unused-but-set-variable")
-		endif(HAS_UNUSED_BUT_SET_VARIABLE_WARNING)
-	endif()
-
 	if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
 		# clang does not understand __extern_always_inline but libc headers use it
 		set(OTHER_FLAGS "${OTHER_FLAGS} \"-D__extern_always_inline=extern __always_inline\"")
diff --git a/src/client.h b/src/client.h
index 898fc4daa..9b1b63c0b 100644
--- a/src/client.h
+++ b/src/client.h
@@ -74,7 +74,7 @@ public:
 	MeshUpdateQueue();
 
 	~MeshUpdateQueue();
-	
+
 	/*
 		peer_id=0 adds with nobody to send to
 	*/
@@ -90,7 +90,7 @@ public:
 		JMutexAutoLock lock(m_mutex);
 		return m_queue.size();
 	}
-	
+
 private:
 	std::vector<QueuedMeshUpdate*> m_queue;
 	std::set<v3s16> m_urgents;
@@ -127,7 +127,7 @@ public:
 	MutexedQueue<MeshUpdateResult> m_queue_out;
 
 	IGameDef *m_gamedef;
-	
+
 	v3s16 m_camera_offset;
 };
 
@@ -152,8 +152,8 @@ struct ClientEvent
 {
 	ClientEventType type;
 	union{
-		struct{
-		} none;
+		//struct{
+		//} none;
 		struct{
 			u8 amount;
 		} player_damage;
@@ -171,8 +171,8 @@ struct ClientEvent
 			std::string *formspec;
 			std::string *formname;
 		} show_formspec;
-		struct{
-		} textures_updated;
+		//struct{
+		//} textures_updated;
 		struct{
 			v3f *pos;
 			v3f *vel;
@@ -315,7 +315,7 @@ public:
 			MtEventManager *event,
 			bool ipv6
 	);
-	
+
 	~Client();
 
 	/*
@@ -362,11 +362,11 @@ public:
 
 	ClientEnvironment& getEnv()
 	{ return m_env; }
-	
+
 	// Causes urgent mesh updates (unlike Map::add/removeNodeWithEvent)
 	void removeNode(v3s16 p);
 	void addNode(v3s16 p, MapNode n, bool remove_metadata = true);
-	
+
 	void setPlayerControl(PlayerControl &control);
 
 	void selectPlayerItem(u16 item);
@@ -378,7 +378,7 @@ public:
 	bool getLocalInventoryUpdated();
 	// Copies the inventory of the local player to parameter
 	void getLocalInventory(Inventory &dst);
-	
+
 	/* InventoryManager interface */
 	Inventory* getInventory(const InventoryLocation &loc);
 	void inventoryAction(InventoryAction *a);
@@ -416,13 +416,13 @@ public:
 	// Including blocks at appropriate edges
 	void addUpdateMeshTaskWithEdge(v3s16 blockpos, bool ack_to_server=false, bool urgent=false);
 	void addUpdateMeshTaskForNode(v3s16 nodepos, bool ack_to_server=false, bool urgent=false);
-	
+
 	void updateCameraOffset(v3s16 camera_offset)
 	{ m_mesh_update_thread.m_camera_offset = camera_offset; }
 
 	// Get event from queue. CE_NONE is returned if queue is empty.
 	ClientEvent getClientEvent();
-	
+
 	bool accessDenied()
 	{ return m_access_denied; }
 
@@ -476,14 +476,14 @@ private:
 	// Virtual methods from con::PeerHandler
 	void peerAdded(con::Peer *peer);
 	void deletingPeer(con::Peer *peer, bool timeout);
-	
+
 	void ReceiveAll();
 	void Receive();
-	
+
 	void sendPlayerPos();
 	// Send the item number 'item' as player item to the server
 	void sendPlayerItem(u16 item);
-	
+
 	float m_packetcounter_timer;
 	float m_connection_reinit_timer;
 	float m_avg_rtt_timer;
diff --git a/src/clientiface.cpp b/src/clientiface.cpp
index 1383d0b84..40d1ef811 100644
--- a/src/clientiface.cpp
+++ b/src/clientiface.cpp
@@ -179,7 +179,7 @@ void RemoteClient::GetNextBlocks(
 	s32 nearest_emerged_d = -1;
 	s32 nearest_emergefull_d = -1;
 	s32 nearest_sent_d = -1;
-	bool queue_is_full = false;
+	//bool queue_is_full = false;
 
 	s16 d;
 	for(d = d_start; d <= d_max; d++)
@@ -214,7 +214,7 @@ void RemoteClient::GetNextBlocks(
 			// Don't select too many blocks for sending
 			if(num_blocks_selected >= max_simul_dynamic)
 			{
-				queue_is_full = true;
+				//queue_is_full = true;
 				goto queue_full_break;
 			}
 
diff --git a/src/clientmap.cpp b/src/clientmap.cpp
index 0e53ab678..2db901f22 100644
--- a/src/clientmap.cpp
+++ b/src/clientmap.cpp
@@ -190,7 +190,7 @@ void ClientMap::updateDrawList(video::IVideoDriver* driver)
 	v3f camera_position = m_camera_position;
 	v3f camera_direction = m_camera_direction;
 	f32 camera_fov = m_camera_fov;
-	v3s16 camera_offset = m_camera_offset;
+	//v3s16 camera_offset = m_camera_offset;
 	m_camera_mutex.Unlock();
 
 	// Use a higher fov to accomodate faster camera movements.
diff --git a/src/connection.cpp b/src/connection.cpp
index eff8a70d1..2ee6d2c6e 100644
--- a/src/connection.cpp
+++ b/src/connection.cpp
@@ -707,14 +707,14 @@ void Channel::UpdateTimers(float dtime,bool legacy_peer)
 
 		unsigned int packet_loss = 11; /* use a neutral value for initialization */
 		unsigned int packets_successfull = 0;
-		unsigned int packet_too_late = 0;
+		//unsigned int packet_too_late = 0;
 
 		bool reasonable_amount_of_data_transmitted = false;
 
 		{
 			JMutexAutoLock internal(m_internal_mutex);
 			packet_loss = current_packet_loss;
-			packet_too_late = current_packet_too_late;
+			//packet_too_late = current_packet_too_late;
 			packets_successfull = current_packet_successfull;
 
 			if (current_bytes_transfered > (unsigned int) (window_size*512/2))
diff --git a/src/content_sao.cpp b/src/content_sao.cpp
index 1edddec7b..d4b3079ec 100644
--- a/src/content_sao.cpp
+++ b/src/content_sao.cpp
@@ -53,7 +53,7 @@ public:
 	// And never save to disk
 	bool isStaticAllowed() const
 	{ return false; }
-	
+
 	static ServerActiveObject* create(ServerEnvironment *env, v3f pos,
 			const std::string &data)
 	{
@@ -99,7 +99,7 @@ public:
 	}
 	u8 getType() const
 	{ return ACTIVEOBJECT_TYPE_TEST; }
-	
+
 	static ServerActiveObject* create(ServerEnvironment *env, v3f pos,
 			const std::string &data)
 	{
@@ -170,7 +170,7 @@ class ItemSAO : public ServerActiveObject
 public:
 	u8 getType() const
 	{ return ACTIVEOBJECT_TYPE_ITEM; }
-	
+
 	float getMinimumSavedMovement()
 	{ return 0.1*BS; }
 
@@ -212,7 +212,7 @@ public:
 		if(m_move_interval.step(dtime, interval)==false)
 			return;
 		dtime = interval;
-		
+
 		core::aabbox3d<f32> box(-BS/3.,0.0,-BS/3., BS/3.,BS*2./3.,BS/3.);
 		collisionMoveResult moveresult;
 		// Apply gravity
@@ -223,13 +223,12 @@ public:
 		if(m_speed_f.getLength()*dtime > pos_max_d)
 			m_speed_f *= pos_max_d / (m_speed_f.getLength()*dtime);
 		v3f pos_f = getBasePosition();
-		v3f pos_f_old = pos_f;
 		v3f accel_f = v3f(0,0,0);
 		f32 stepheight = 0;
 		moveresult = collisionMoveSimple(m_env,m_env->getGameDef(),
 				pos_max_d, box, stepheight, dtime,
 				pos_f, m_speed_f, accel_f);
-		
+
 		if(send_recommended == false)
 			return;
 
@@ -327,7 +326,7 @@ public:
 				m_itemstring_changed = true;
 			}
 		}
-		
+
 		return 0;
 	}
 
@@ -392,7 +391,7 @@ LuaEntitySAO::LuaEntitySAO(ServerEnvironment *env, v3f pos,
 		ServerActiveObject::registerType(getType(), create);
 		return;
 	}
-	
+
 	// Initialize something to armor groups
 	m_armor_groups["fleshy"] = 100;
 }
@@ -407,11 +406,11 @@ LuaEntitySAO::~LuaEntitySAO()
 void LuaEntitySAO::addedToEnvironment(u32 dtime_s)
 {
 	ServerActiveObject::addedToEnvironment(dtime_s);
-	
+
 	// Create entity from name
 	m_registered = m_env->getScriptIface()->
 		luaentity_Add(m_id, m_init_name.c_str());
-	
+
 	if(m_registered){
 		// Get properties
 		m_env->getScriptIface()->
@@ -671,10 +670,10 @@ int LuaEntitySAO::punch(v3f dir,
 		return 0;
 	}
 
-	// It's best that attachments cannot be punched 
+	// It's best that attachments cannot be punched
 	if(isAttached())
 		return 0;
-	
+
 	ItemStack *punchitem = NULL;
 	ItemStack punchitem_static;
 	if(puncher){
@@ -687,11 +686,11 @@ int LuaEntitySAO::punch(v3f dir,
 			toolcap,
 			punchitem,
 			time_from_last_punch);
-	
+
 	if(result.did_punch)
 	{
 		setHP(getHP() - result.damage);
-		
+
 
 		std::string punchername = "nil";
 
@@ -701,7 +700,7 @@ int LuaEntitySAO::punch(v3f dir,
 		actionstream<<getDescription()<<" punched by "
 				<<punchername<<", damage "<<result.damage
 				<<" hp, health now "<<getHP()<<" hp"<<std::endl;
-		
+
 		{
 			std::string str = gob_cmd_punched(result.damage, getHP());
 			// create message and add to list
@@ -887,7 +886,7 @@ void LuaEntitySAO::sendPosition(bool do_interpolate, bool is_movement_end)
 	// If the object is attached client-side, don't waste bandwidth sending its position to clients
 	if(isAttached())
 		return;
-	
+
 	m_last_sent_move_precision = m_base_position.getDistanceFrom(
 			m_last_sent_position);
 	m_last_sent_position_timer = 0;
@@ -1272,7 +1271,7 @@ int PlayerSAO::punch(v3f dir,
 	ServerActiveObject *puncher,
 	float time_from_last_punch)
 {
-	// It's best that attachments cannot be punched 
+	// It's best that attachments cannot be punched
 	if(isAttached())
 		return 0;
 
@@ -1488,15 +1487,12 @@ bool PlayerSAO::checkMovementCheat()
 		*/
 
 		float player_max_speed = 0;
-		float player_max_speed_up = 0;
 		if(m_privs.count("fast") != 0){
 			// Fast speed
 			player_max_speed = m_player->movement_speed_fast;
-			player_max_speed_up = m_player->movement_speed_fast;
 		} else {
 			// Normal speed
 			player_max_speed = m_player->movement_speed_walk;
-			player_max_speed_up = m_player->movement_speed_walk;
 		}
 		// Tolerance. With the lag pool we shouldn't need it.
 		//player_max_speed *= 2.5;
diff --git a/src/drawscene.cpp b/src/drawscene.cpp
index 8ba2be1b0..b089e71e6 100644
--- a/src/drawscene.cpp
+++ b/src/drawscene.cpp
@@ -167,7 +167,7 @@ video::ITexture* draw_image(const v2u32& screensize,
 		image = images[1];
 	else
 		image = images[0];
-	
+
 	driver->setRenderTarget(image, true, true,
 			irr::video::SColor(255,
 					skycolor.getRed(), skycolor.getGreen(), skycolor.getBlue()));
@@ -421,79 +421,74 @@ void draw_scene(video::IVideoDriver* driver, scene::ISceneManager* smgr,
 		gui::IGUIEnvironment* guienv, std::vector<aabb3f> hilightboxes,
 		const v2u32& screensize, video::SColor skycolor, bool show_hud)
 {
-	//TODO check if usefull
-	u32 scenetime = 0;
-	{
-		TimeTaker timer("smgr");
+	TimeTaker timer("smgr");
 
-		bool draw_wield_tool = (show_hud &&
-				(player->hud_flags & HUD_FLAG_WIELDITEM_VISIBLE) &&
-				camera.getCameraMode() < CAMERA_MODE_THIRD );
+	bool draw_wield_tool = (show_hud &&
+			(player->hud_flags & HUD_FLAG_WIELDITEM_VISIBLE) &&
+			camera.getCameraMode() < CAMERA_MODE_THIRD );
 
-		bool draw_crosshair = ((player->hud_flags & HUD_FLAG_CROSSHAIR_VISIBLE) &&
-				(camera.getCameraMode() != CAMERA_MODE_THIRD_FRONT));
+	bool draw_crosshair = ((player->hud_flags & HUD_FLAG_CROSSHAIR_VISIBLE) &&
+			(camera.getCameraMode() != CAMERA_MODE_THIRD_FRONT));
 
 #ifdef HAVE_TOUCHSCREENGUI
-		try {
-			draw_crosshair = !g_settings->getBool("touchtarget");
-		}
-		catch(SettingNotFoundException) {}
+	try {
+		draw_crosshair = !g_settings->getBool("touchtarget");
+	}
+	catch(SettingNotFoundException) {}
 #endif
 
-		std::string draw_mode = g_settings->get("3d_mode");
+	std::string draw_mode = g_settings->get("3d_mode");
 
-		smgr->drawAll();
+	smgr->drawAll();
 
-		if (draw_mode == "anaglyph")
-		{
-			draw_anaglyph_3d_mode(camera, show_hud, hud, hilightboxes, driver,
-					smgr, draw_wield_tool, client, guienv);
-			draw_crosshair = false;
-		}
-		else if (draw_mode == "interlaced")
-		{
-			draw_interlaced_3d_mode(camera, show_hud, hud, hilightboxes, driver,
-					smgr, screensize, draw_wield_tool, client, guienv, skycolor);
-			draw_crosshair = false;
-		}
-		else if (draw_mode == "sidebyside")
-		{
-			draw_sidebyside_3d_mode(camera, show_hud, hud, hilightboxes, driver,
-					smgr, screensize, draw_wield_tool, client, guienv, skycolor);
-			show_hud = false;
-		}
-		else if (draw_mode == "topbottom")
-		{
-			draw_top_bottom_3d_mode(camera, show_hud, hud, hilightboxes, driver,
-					smgr, screensize, draw_wield_tool, client, guienv, skycolor);
-			show_hud = false;
-		}
-		else {
-			draw_plain(camera, show_hud, hud, hilightboxes, driver,
-					draw_wield_tool, client, guienv);
-		}
-
-		/*
-			Post effects
-		*/
-		{
-			client.getEnv().getClientMap().renderPostFx(camera.getCameraMode());
-		}
-
-		//TODO how to make those 3d too
-		if (show_hud)
-		{
-			if (draw_crosshair)
-				hud.drawCrosshair();
-			hud.drawHotbar(client.getPlayerItem());
-			hud.drawLuaElements(camera.getOffset());
-		}
-
-		guienv->drawAll();
-
-		scenetime = timer.stop(true);
+	if (draw_mode == "anaglyph")
+	{
+		draw_anaglyph_3d_mode(camera, show_hud, hud, hilightboxes, driver,
+				smgr, draw_wield_tool, client, guienv);
+		draw_crosshair = false;
+	}
+	else if (draw_mode == "interlaced")
+	{
+		draw_interlaced_3d_mode(camera, show_hud, hud, hilightboxes, driver,
+				smgr, screensize, draw_wield_tool, client, guienv, skycolor);
+		draw_crosshair = false;
+	}
+	else if (draw_mode == "sidebyside")
+	{
+		draw_sidebyside_3d_mode(camera, show_hud, hud, hilightboxes, driver,
+				smgr, screensize, draw_wield_tool, client, guienv, skycolor);
+		show_hud = false;
+	}
+	else if (draw_mode == "topbottom")
+	{
+		draw_top_bottom_3d_mode(camera, show_hud, hud, hilightboxes, driver,
+				smgr, screensize, draw_wield_tool, client, guienv, skycolor);
+		show_hud = false;
+	}
+	else {
+		draw_plain(camera, show_hud, hud, hilightboxes, driver,
+				draw_wield_tool, client, guienv);
 	}
 
+	/*
+		Post effects
+	*/
+	{
+		client.getEnv().getClientMap().renderPostFx(camera.getCameraMode());
+	}
+
+	//TODO how to make those 3d too
+	if (show_hud)
+	{
+		if (draw_crosshair)
+			hud.drawCrosshair();
+		hud.drawHotbar(client.getPlayerItem());
+		hud.drawLuaElements(camera.getOffset());
+	}
+
+	guienv->drawAll();
+
+	timer.stop(true);
 }
 
 /*
diff --git a/src/environment.h b/src/environment.h
index 03c21b08c..13c0c0efe 100644
--- a/src/environment.h
+++ b/src/environment.h
@@ -77,7 +77,7 @@ public:
 	Player * getNearestConnectedPlayer(v3f pos);
 	std::list<Player*> getPlayers();
 	std::list<Player*> getPlayers(bool ignore_disconnected);
-	
+
 	u32 getDayNightRatio();
 
 	// 0-23999
@@ -96,7 +96,7 @@ public:
 	void stepTimeOfDay(float dtime);
 
 	void setTimeOfDaySpeed(float speed);
-	
+
 	float getTimeOfDaySpeed();
 
 	void setDayNightRatioOverride(bool enable, u32 value)
@@ -132,7 +132,7 @@ protected:
 	 *       a later release.
 	 */
 	bool m_cache_enable_shaders;
-	
+
 private:
 	JMutex m_lock;
 
@@ -150,7 +150,7 @@ class ActiveBlockModifier
 public:
 	ActiveBlockModifier(){};
 	virtual ~ActiveBlockModifier(){};
-	
+
 	// Set of contents to trigger on
 	virtual std::set<std::string> getTriggerContents()=0;
 	// Set of required neighbors (trigger doesn't happen if none are found)
@@ -255,7 +255,7 @@ public:
 		Returns 0 if not added and thus deleted.
 	*/
 	u16 addActiveObject(ServerActiveObject *object);
-	
+
 	/*
 		Add an active object as a static object to the corresponding
 		MapBlock.
@@ -264,7 +264,7 @@ public:
 		(note:  not used, pending removal from engine)
 	*/
 	//bool addActiveObjectAsStatic(ServerActiveObject *object);
-	
+
 	/*
 		Find out what new objects have been added to
 		inside a radius around a position
@@ -282,7 +282,7 @@ public:
 			s16 player_radius,
 			std::set<u16> &current_objects,
 			std::set<u16> &removed_objects);
-	
+
 	/*
 		Get the next message emitted by some active object.
 		Returns a message with id=0 if no messages are available.
@@ -311,16 +311,16 @@ public:
 	bool setNode(v3s16 p, const MapNode &n);
 	bool removeNode(v3s16 p);
 	bool swapNode(v3s16 p, const MapNode &n);
-	
+
 	// Find all active objects inside a radius around a point
 	std::set<u16> getObjectsInsideRadius(v3f pos, float radius);
-	
+
 	// Clear all objects, loading and going through every MapBlock
 	void clearAllObjects();
-	
+
 	// This makes stuff happen
 	void step(f32 dtime);
-	
+
 	//check if there's a line of sight between two positions
 	bool line_of_sight(v3f pos1, v3f pos2, float stepsize=1.0, v3s16 *p=NULL);
 
@@ -328,9 +328,9 @@ public:
 
 	void reportMaxLagEstimate(float f) { m_max_lag_estimate = f; }
 	float getMaxLagEstimate() { return m_max_lag_estimate; }
-	
+
 	std::set<v3s16>* getForceloadedBlocks() { return &m_active_blocks.m_forceloaded_list; };
-	
+
 private:
 
 	/*
@@ -349,17 +349,17 @@ private:
 		Returns 0 if not added and thus deleted.
 	*/
 	u16 addActiveObjectRaw(ServerActiveObject *object, bool set_changed, u32 dtime_s);
-	
+
 	/*
 		Remove all objects that satisfy (m_removed && m_known_by_count==0)
 	*/
 	void removeRemovedObjects();
-	
+
 	/*
 		Convert stored objects from block to active
 	*/
 	void activateObjects(MapBlock *block, u32 dtime_s);
-	
+
 	/*
 		Convert objects that are not in active blocks to static.
 
@@ -374,7 +374,7 @@ private:
 	/*
 		Member variables
 	*/
-	
+
 	// The map
 	ServerMap *m_map;
 	// Lua state
@@ -433,8 +433,8 @@ struct ClientEnvEvent
 {
 	ClientEnvEventType type;
 	union {
-		struct{
-		} none;
+		//struct{
+		//} none;
 		struct{
 			u8 amount;
 			bool send_to_server;
@@ -463,7 +463,7 @@ public:
 
 	virtual void addPlayer(Player *player);
 	LocalPlayer * getLocalPlayer();
-	
+
 	/*
 		ClientSimpleObjects
 	*/
@@ -473,7 +473,7 @@ public:
 	/*
 		ActiveObjects
 	*/
-	
+
 	ClientActiveObject* getActiveObject(u16 id);
 
 	/*
@@ -501,11 +501,11 @@ public:
 	/*
 		Client likes to call these
 	*/
-	
+
 	// Get all nearby objects
 	void getActiveObjects(v3f origin, f32 max_d,
 			std::vector<DistanceSortedActiveObject> &dest);
-	
+
 	// Get event from queue. CEE_NONE is returned if queue is empty.
 	ClientEnvEvent getClientEvent();
 
@@ -521,7 +521,7 @@ public:
 	{ m_camera_offset = camera_offset; }
 	v3s16 getCameraOffset()
 	{ return m_camera_offset; }
-	
+
 private:
 	ClientMap *m_map;
 	scene::ISceneManager *m_smgr;
diff --git a/src/guiEngine.cpp b/src/guiEngine.cpp
index 814a7504a..de6f44134 100644
--- a/src/guiEngine.cpp
+++ b/src/guiEngine.cpp
@@ -364,15 +364,14 @@ void GUIEngine::cloudPostProcess()
 {
 	float fps_max = g_settings->getFloat("fps_max");
 	// Time of frame without fps limit
-	float busytime;
 	u32 busytime_u32;
+
 	// not using getRealTime is necessary for wine
 	u32 time = m_device->getTimer()->getTime();
 	if(time > m_cloud.lasttime)
 		busytime_u32 = time - m_cloud.lasttime;
 	else
 		busytime_u32 = 0;
-	busytime = busytime_u32 / 1000.0;
 
 	// FPS limiter
 	u32 frametime_min = 1000./fps_max;
diff --git a/src/jthread/pthread/jthread.cpp b/src/jthread/pthread/jthread.cpp
index e90c03456..414d8fde5 100644
--- a/src/jthread/pthread/jthread.cpp
+++ b/src/jthread/pthread/jthread.cpp
@@ -146,10 +146,7 @@ bool JThread::IsSameThread()
 
 void *JThread::TheThread(void *param)
 {
-	JThread *jthread;
-	void *ret;
-
-	jthread = (JThread *)param;
+	JThread *jthread = (JThread *)param;
 
 	jthread->continuemutex2.Lock();
 	jthread->running = true;
@@ -157,7 +154,7 @@ void *JThread::TheThread(void *param)
 	jthread->continuemutex.Lock();
 	jthread->continuemutex.Unlock();
 
-	ret = jthread->Thread();
+	jthread->Thread();
 
 	jthread->running = false;
 
diff --git a/src/localplayer.cpp b/src/localplayer.cpp
index a5ce147c1..69d4ec7ef 100644
--- a/src/localplayer.cpp
+++ b/src/localplayer.cpp
@@ -74,8 +74,6 @@ void LocalPlayer::move(f32 dtime, Environment *env, f32 pos_max_d,
 
 	v3f position = getPosition();
 
-	v3f old_speed = m_speed;
-
 	// Copy parent position if local player is attached
 	if(isAttached)
 	{
@@ -100,7 +98,7 @@ void LocalPlayer::move(f32 dtime, Environment *env, f32 pos_max_d,
 	/*
 		Collision detection
 	*/
-	
+
 	bool is_valid_position;
 	MapNode node;
 	v3s16 pp;
@@ -191,7 +189,7 @@ void LocalPlayer::move(f32 dtime, Environment *env, f32 pos_max_d,
 		v3f lwn_f = intToFloat(m_sneak_node, BS);
 		position.X = rangelim(position.X, lwn_f.X-maxd, lwn_f.X+maxd);
 		position.Z = rangelim(position.Z, lwn_f.Z-maxd, lwn_f.Z+maxd);
-		
+
 		if(!is_climbing)
 		{
 			f32 min_y = lwn_f.Y + 0.5*BS;
@@ -211,7 +209,7 @@ void LocalPlayer::move(f32 dtime, Environment *env, f32 pos_max_d,
 #ifdef __ANDROID__
 	player_stepheight += (0.5 * BS);
 #endif
-	
+
 	v3f accel_f = v3f(0,0,0);
 
 	collisionMoveResult result = collisionMoveSimple(env, m_gamedef,
@@ -226,7 +224,7 @@ void LocalPlayer::move(f32 dtime, Environment *env, f32 pos_max_d,
 	*/
 	bool touching_ground_was = touching_ground;
 	touching_ground = result.touching_ground;
-    
+
     //bool standing_on_unloaded = result.standing_on_unloaded;
 
 	/*
@@ -277,7 +275,7 @@ void LocalPlayer::move(f32 dtime, Environment *env, f32 pos_max_d,
 			f32 max_axis_distance_f = MYMAX(
 					fabs(player_p2df.X-node_p2df.X),
 					fabs(player_p2df.Y-node_p2df.Y));
-					
+
 			if(distance_f > min_distance_f ||
 					max_axis_distance_f > 0.5*BS + sneak_max + 0.1*BS)
 				continue;
@@ -301,7 +299,7 @@ void LocalPlayer::move(f32 dtime, Environment *env, f32 pos_max_d,
 			min_distance_f = distance_f;
 			new_sneak_node = p;
 		}
-		
+
 		bool sneak_node_found = (min_distance_f < 100000.0*BS*0.9);
 
 		m_sneak_node = new_sneak_node;
@@ -314,12 +312,12 @@ void LocalPlayer::move(f32 dtime, Environment *env, f32 pos_max_d,
 		if(sneak_node_found && control.sneak)
 			touching_ground = true;
 	}
-	
+
 	/*
 		Set new position
 	*/
 	setPosition(position);
-	
+
 	/*
 		Report collisions
 	*/
@@ -367,7 +365,7 @@ void LocalPlayer::move(f32 dtime, Environment *env, f32 pos_max_d,
 	*/
 	m_old_node_below = floatToInt(position - v3f(0,BS/2,0), BS);
 	m_old_node_below_type = nodemgr->get(map->getNodeNoEx(m_old_node_below)).name;
-	
+
 	/*
 		Check properties of the node on which the player is standing
 	*/
@@ -400,10 +398,10 @@ void LocalPlayer::applyControl(float dtime)
 
 	v3f move_direction = v3f(0,0,1);
 	move_direction.rotateXZBy(getYaw());
-	
+
 	v3f speedH = v3f(0,0,0); // Horizontal (X, Z)
 	v3f speedV = v3f(0,0,0); // Vertical (Y)
-	
+
 	bool fly_allowed = m_gamedef->checkLocalPrivilege("fly");
 	bool fast_allowed = m_gamedef->checkLocalPrivilege("fast");
 
@@ -415,7 +413,7 @@ void LocalPlayer::applyControl(float dtime)
 
 	// Whether superspeed mode is used or not
 	bool superspeed = false;
-	
+
 	if(g_settings->getBool("always_fly_fast") && free_move && fast_move)
 		superspeed = true;
 
@@ -425,7 +423,7 @@ void LocalPlayer::applyControl(float dtime)
 		// If free movement and fast movement, always move fast
 		if(free_move && fast_move)
 			superspeed = true;
-		
+
 		// Auxiliary button 1 (E)
 		if(control.aux1)
 		{
@@ -548,7 +546,7 @@ void LocalPlayer::applyControl(float dtime)
 			{
 				speedJ.Y = movement_speed_jump * physics_override_jump;
 				setSpeed(speedJ);
-				
+
 				MtEvent *e = new SimpleTriggerEvent("PlayerJump");
 				m_gamedef->event()->put(e);
 			}
diff --git a/src/map.cpp b/src/map.cpp
index 434243a10..bd3636c7b 100644
--- a/src/map.cpp
+++ b/src/map.cpp
@@ -3220,8 +3220,6 @@ bool ServerMap::loadSectorMeta(v2s16 p2d)
 {
 	DSTACK(__FUNCTION_NAME);
 
-	MapSector *sector = NULL;
-
 	// The directory layout we're going to load from.
 	//  1 - original sectors/xxxxzzzz/
 	//  2 - new sectors2/xxx/zzz/
@@ -3241,7 +3239,7 @@ bool ServerMap::loadSectorMeta(v2s16 p2d)
 	}
 
 	try{
-		sector = loadSectorMeta(sectordir, loadlayout != 2);
+		loadSectorMeta(sectordir, loadlayout != 2);
 	}
 	catch(InvalidFilenameException &e)
 	{
diff --git a/src/mapblock.cpp b/src/mapblock.cpp
index 255b661b0..4cc0abc81 100644
--- a/src/mapblock.cpp
+++ b/src/mapblock.cpp
@@ -62,7 +62,7 @@ MapBlock::MapBlock(Map *parent, v3s16 pos, IGameDef *gamedef, bool dummy):
 	data = NULL;
 	if(dummy == false)
 		reallocate();
-	
+
 #ifndef SERVER
 	mesh = NULL;
 #endif
@@ -73,7 +73,7 @@ MapBlock::~MapBlock()
 #ifndef SERVER
 	{
 		//JMutexAutoLock lock(mesh_mutex);
-		
+
 		if(mesh)
 		{
 			delete mesh;
@@ -115,7 +115,7 @@ MapNode MapBlock::getNodeParent(v3s16 p, bool *is_valid_position)
 /*
 	Propagates sunlight down through the block.
 	Doesn't modify nodes that are not affected by sunlight.
-	
+
 	Returns false if sunlight at bottom block is invalid.
 	Returns true if sunlight at bottom block is valid.
 	Returns true if bottom block doesn't exist.
@@ -138,16 +138,16 @@ bool MapBlock::propagateSunlight(std::set<v3s16> & light_sources,
 
 	// Whether the sunlight at the top of the bottom block is valid
 	bool block_below_is_valid = true;
-	
+
 	v3s16 pos_relative = getPosRelative();
-	
+
 	for(s16 x=0; x<MAP_BLOCKSIZE; x++)
 	{
 		for(s16 z=0; z<MAP_BLOCKSIZE; z++)
 		{
 #if 1
 			bool no_sunlight = false;
-			bool no_top_block = false;
+			//bool no_top_block = false;
 
 			// Check if node above block has sunlight
 
@@ -168,8 +168,8 @@ bool MapBlock::propagateSunlight(std::set<v3s16> & light_sources,
 			}
 			else
 			{
-				no_top_block = true;
-				
+				//no_top_block = true;
+
 				// NOTE: This makes over-ground roofed places sunlighted
 				// Assume sunlight, unless is_underground==true
 				if(is_underground)
@@ -211,19 +211,19 @@ bool MapBlock::propagateSunlight(std::set<v3s16> & light_sources,
 					<<", is_underground="<<is_underground
 					<<", no_sunlight="<<no_sunlight
 					<<std::endl;*/
-		
+
 			s16 y = MAP_BLOCKSIZE-1;
-			
+
 			// This makes difference to diminishing in water.
 			bool stopped_to_solid_object = false;
-			
+
 			u8 current_light = no_sunlight ? 0 : LIGHT_SUN;
 
 			for(; y >= 0; y--)
 			{
 				v3s16 pos(x, y, z);
 				MapNode &n = getNodeRef(pos);
-				
+
 				if(current_light == 0)
 				{
 					// Do nothing
@@ -236,7 +236,7 @@ bool MapBlock::propagateSunlight(std::set<v3s16> & light_sources,
 				{
 					// A solid object is on the way.
 					stopped_to_solid_object = true;
-					
+
 					// Light stops.
 					current_light = 0;
 				}
@@ -252,7 +252,7 @@ bool MapBlock::propagateSunlight(std::set<v3s16> & light_sources,
 				{
 					n.setLight(LIGHTBANK_DAY, current_light, nodemgr);
 				}
-				
+
 				if(diminish_light(current_light) != 0)
 				{
 					light_sources.insert(pos_relative + pos);
@@ -275,7 +275,7 @@ bool MapBlock::propagateSunlight(std::set<v3s16> & light_sources,
 
 				Check if the node below the block has proper sunlight at top.
 				If not, the block below is invalid.
-				
+
 				Ignore non-transparent nodes as they always have no light
 			*/
 
@@ -311,7 +311,7 @@ void MapBlock::copyTo(VoxelManipulator &dst)
 {
 	v3s16 data_size(MAP_BLOCKSIZE, MAP_BLOCKSIZE, MAP_BLOCKSIZE);
 	VoxelArea data_area(v3s16(0,0,0), data_size - v3s16(1,1,1));
-	
+
 	// Copy from data to VoxelManipulator
 	dst.copyFrom(data, data_area, v3s16(0,0,0),
 			getPosRelative(), data_size);
@@ -321,7 +321,7 @@ void MapBlock::copyFrom(VoxelManipulator &dst)
 {
 	v3s16 data_size(MAP_BLOCKSIZE, MAP_BLOCKSIZE, MAP_BLOCKSIZE);
 	VoxelArea data_area(v3s16(0,0,0), data_size - v3s16(1,1,1));
-	
+
 	// Copy from VoxelManipulator to data
 	dst.copyTo(data, data_area, v3s16(0,0,0),
 			getPosRelative(), data_size);
@@ -520,18 +520,18 @@ void MapBlock::serialize(std::ostream &os, u8 version, bool disk)
 {
 	if(!ser_ver_supported(version))
 		throw VersionMismatchException("ERROR: MapBlock format not supported");
-	
+
 	if(data == NULL)
 	{
 		throw SerializationError("ERROR: Not writing dummy block.");
 	}
-	
+
 	// Can't do this anymore; we have 16-bit dynamically allocated node IDs
 	// in memory; conversion just won't work in this direction.
 	if(version < 24)
 		throw SerializationError("MapBlock::serialize: serialization to "
 				"version < 24 not possible");
-		
+
 	// First byte
 	u8 flags = 0;
 	if(is_underground)
@@ -543,7 +543,7 @@ void MapBlock::serialize(std::ostream &os, u8 version, bool disk)
 	if(m_generated == false)
 		flags |= 0x08;
 	writeU8(os, flags);
-	
+
 	/*
 		Bulk node data
 	*/
@@ -573,7 +573,7 @@ void MapBlock::serialize(std::ostream &os, u8 version, bool disk)
 		MapNode::serializeBulk(os, version, data, nodecount,
 				content_width, params_width, true);
 	}
-	
+
 	/*
 		Node metadata
 	*/
@@ -599,7 +599,7 @@ void MapBlock::serialize(std::ostream &os, u8 version, bool disk)
 
 		// Write block-specific node definition id mapping
 		nimap.serialize(os);
-		
+
 		if(version >= 25){
 			// Node timers
 			m_node_timers.serialize(os, version);
@@ -626,7 +626,7 @@ void MapBlock::deSerialize(std::istream &is, u8 version, bool disk)
 {
 	if(!ser_ver_supported(version))
 		throw VersionMismatchException("ERROR: MapBlock format not supported");
-	
+
 	TRACESTREAM(<<"MapBlock::deSerialize "<<PP(getPos())<<std::endl);
 
 	m_day_night_differs_expired = false;
@@ -702,13 +702,13 @@ void MapBlock::deSerialize(std::istream &is, u8 version, bool disk)
 		TRACESTREAM(<<"MapBlock::deSerialize "<<PP(getPos())
 				<<": Static objects"<<std::endl);
 		m_static_objects.deSerialize(is);
-		
+
 		// Timestamp
 		TRACESTREAM(<<"MapBlock::deSerialize "<<PP(getPos())
 				<<": Timestamp"<<std::endl);
 		setTimestamp(readU32(is));
 		m_disk_timestamp = m_timestamp;
-		
+
 		// Dynamically re-set ids based on node names
 		TRACESTREAM(<<"MapBlock::deSerialize "<<PP(getPos())
 				<<": NameIdMapping"<<std::endl);
@@ -722,7 +722,7 @@ void MapBlock::deSerialize(std::istream &is, u8 version, bool disk)
 			m_node_timers.deSerialize(is, version);
 		}
 	}
-		
+
 	TRACESTREAM(<<"MapBlock::deSerialize "<<PP(getPos())
 			<<": Done."<<std::endl);
 }
@@ -809,7 +809,7 @@ void MapBlock::deSerialize_pre22(std::istream &is, u8 version, bool disk)
 				databuf_nodelist[i*ser_length + 1] = s[i];
 			}
 		}
-	
+
 		if(version >= 10)
 		{
 			// Uncompress and set param2 data
@@ -852,7 +852,7 @@ void MapBlock::deSerialize_pre22(std::istream &is, u8 version, bool disk)
 			databuf_nodelist[i*ser_length + 1] = s[i+nodecount];
 			databuf_nodelist[i*ser_length + 2] = s[i+nodecount*2];
 		}
-		
+
 		/*
 			NodeMetadata
 		*/
@@ -989,12 +989,12 @@ std::string analyze_block(MapBlock *block)
 		return "NULL";
 
 	std::ostringstream desc;
-	
+
 	v3s16 p = block->getPos();
 	char spos[20];
 	snprintf(spos, 20, "(%2d,%2d,%2d), ", p.X, p.Y, p.Z);
 	desc<<spos;
-	
+
 	switch(block->getModified())
 	{
 	case MOD_STATE_CLEAN:
@@ -1051,21 +1051,21 @@ std::string analyze_block(MapBlock *block)
 			else
 				full_air = false;
 		}
-		
+
 		desc<<"content {";
-		
+
 		std::ostringstream ss;
-		
+
 		if(full_ignore)
 			ss<<"IGNORE (full), ";
 		else if(some_ignore)
 			ss<<"IGNORE, ";
-		
+
 		if(full_air)
 			ss<<"AIR (full), ";
 		else if(some_air)
 			ss<<"AIR, ";
-		
+
 		if(ss.str().size()>=2)
 			desc<<ss.str().substr(0, ss.str().size()-2);
 
diff --git a/src/mapgen.cpp b/src/mapgen.cpp
index ef3daf305..ba1b16d6a 100644
--- a/src/mapgen.cpp
+++ b/src/mapgen.cpp
@@ -310,7 +310,6 @@ void Mapgen::spreadLight(v3s16 nmin, v3s16 nmax)
 {
 	//TimeTaker t("spreadLight");
 	VoxelArea a(nmin, nmax);
-	v3s16 em = vm->m_area.getExtent();
 
 	for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
 		for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
diff --git a/src/mapgen_v6.cpp b/src/mapgen_v6.cpp
index 1abf95e01..95cdbd279 100644
--- a/src/mapgen_v6.cpp
+++ b/src/mapgen_v6.cpp
@@ -438,7 +438,6 @@ void MapgenV6::makeChunk(BlockMakeData *data)
 	this->ndef = data->nodedef;
 
 	// Hack: use minimum block coords for old code that assumes a single block
-	v3s16 blockpos = data->blockpos_requested;
 	v3s16 blockpos_min = data->blockpos_min;
 	v3s16 blockpos_max = data->blockpos_max;
 
diff --git a/src/script/lua_api/l_mainmenu.cpp b/src/script/lua_api/l_mainmenu.cpp
index c8389d889..0f903ba5e 100644
--- a/src/script/lua_api/l_mainmenu.cpp
+++ b/src/script/lua_api/l_mainmenu.cpp
@@ -1025,10 +1025,6 @@ int ModApiMainMenu::l_download_file(lua_State *L)
 /******************************************************************************/
 int ModApiMainMenu::l_get_video_drivers(lua_State *L)
 {
-	unsigned int index = 1;
-	lua_newtable(L);
-	int top = lua_gettop(L);
-
 	std::vector<irr::video::E_DRIVER_TYPE> drivers
 		= porting::getSupportedVideoDrivers();
 
diff --git a/src/script/lua_api/l_mapgen.h b/src/script/lua_api/l_mapgen.h
index dd96a009e..e17d1b85a 100644
--- a/src/script/lua_api/l_mapgen.h
+++ b/src/script/lua_api/l_mapgen.h
@@ -23,7 +23,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "lua_api/l_base.h"
 
 class INodeDefManager;
-class NodeResolveInfo;
+struct NodeResolveInfo;
 class DecoSimple;
 class DecoSchematic;