diff --git a/doomsday/CMakeLists.txt b/doomsday/CMakeLists.txt
index 24735950f9..11d261a51f 100644
--- a/doomsday/CMakeLists.txt
+++ b/doomsday/CMakeLists.txt
@@ -307,8 +307,8 @@ IF (APPLE)
         SET (CMAKE_OSX_DEPLOYMENT_TARGET 10.4)
         SET (CMAKE_OSX_ARCHITECTURES "ppc;i386") # 32-bit
         SET (CMAKE_OSX_SYSROOT "/Developer/SDKs/MacOSX10.4u.sdk")
-	    SET (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mmacosx-version-min=10.4" )
-	    SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mmacosx-version-min=10.4" )
+        SET (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mmacosx-version-min=10.4 -Wunused-variable" )
+        SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mmacosx-version-min=10.4 -Wunused-variable" )
     	# 10.4 doesn't appear to have libpng.dylib as a system library.
     	# So we'll use a statically linked one instead.
     	SET (USE_STATIC_PNG "YES")
@@ -318,8 +318,8 @@ IF (APPLE)
         SET (CMAKE_OSX_DEPLOYMENT_TARGET 10.6)
         SET (CMAKE_OSX_ARCHITECTURES "i386")
 	    SET (CMAKE_OSX_SYSROOT "/Developer/SDKs/MacOSX10.6.sdk")
-	    SET (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mmacosx-version-min=10.6" )
-	    SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mmacosx-version-min=10.6" )
+		SET (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mmacosx-version-min=10.6 -Wunused-variable" )
+		SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mmacosx-version-min=10.6 -Wunused-variable" )
     ENDIF()
 
 	SET (BUILDSYSTEM MACOSX)
diff --git a/doomsday/engine/portable/src/cl_frame.c b/doomsday/engine/portable/src/cl_frame.c
index fbefc4b805..17954109c4 100644
--- a/doomsday/engine/portable/src/cl_frame.c
+++ b/doomsday/engine/portable/src/cl_frame.c
@@ -214,7 +214,7 @@ VERBOSE2( Con_Printf("Cl_ConvertSetToOrdinal: Wraparound, now base is %i.\n",
  */
 void Cl_Frame2Received(int packetType)
 {
-    byte        set = Msg_ReadByte(), oldSet, resend, deltaType;
+    byte        set = Msg_ReadByte(), deltaType;
     //byte        resendAcks[300];
     //int         i, numResendAcks = 0;
     boolean     skip = false;
diff --git a/doomsday/engine/portable/src/cl_player.c b/doomsday/engine/portable/src/cl_player.c
index cbb67bc55b..47725fca5a 100644
--- a/doomsday/engine/portable/src/cl_player.c
+++ b/doomsday/engine/portable/src/cl_player.c
@@ -229,9 +229,9 @@ void ClPlayer_ApplyPendingFixes(int plrNum)
 void ClPlayer_HandleFix(void)
 {
     player_t           *plr = &ddPlayers[consolePlayer];
-    mobj_t             *clmo = ClPlayer_ClMobj(consolePlayer);
+    //mobj_t             *clmo = ClPlayer_ClMobj(consolePlayer);
     ddplayer_t         *ddpl = &plr->shared;
-    mobj_t             *mo = ddpl->mo;
+    //mobj_t             *mo = ddpl->mo;
     int                 fixes = Msg_ReadLong();
     clplayerstate_t    *state = ClPlayer_State(consolePlayer);
 
diff --git a/doomsday/engine/portable/src/net_buf.c b/doomsday/engine/portable/src/net_buf.c
index ee99be69fd..0dd8408aa7 100644
--- a/doomsday/engine/portable/src/net_buf.c
+++ b/doomsday/engine/portable/src/net_buf.c
@@ -260,8 +260,8 @@ void N_SendPacket(int flags)
     // Figure out the destination DPNID.
     if(netServerMode)
     {
-        player_t           *plr = &ddPlayers[netBuffer.player];
-        ddplayer_t         *ddpl = &plr->shared;
+        //player_t           *plr = &ddPlayers[netBuffer.player];
+        //ddplayer_t         *ddpl = &plr->shared;
 
         if(netBuffer.player >= 0 && netBuffer.player < DDMAXPLAYERS)
         {
diff --git a/doomsday/engine/portable/src/p_mobj.c b/doomsday/engine/portable/src/p_mobj.c
index 7b504f2456..919c61f47c 100644
--- a/doomsday/engine/portable/src/p_mobj.c
+++ b/doomsday/engine/portable/src/p_mobj.c
@@ -91,17 +91,17 @@ typedef struct {
 // PRIVATE DATA DEFINITIONS ------------------------------------------------
 
 // Slide variables.
-static float bestSlideFrac;
-static float secondSlideFrac;
-static linedef_t *bestSlideLine;
-static linedef_t *secondSlideLine;
+//static float bestSlideFrac;
+//static float secondSlideFrac;
+//static linedef_t *bestSlideLine;
+//static linedef_t *secondSlideLine;
 
-static mobj_t *slideMo;
+//static mobj_t *slideMo;
 
-static boolean noFit;
+//static boolean noFit;
 
-static float tmpDropOffZ;
-static float tmpMom[3];
+//static float tmpDropOffZ;
+//static float tmpMom[3];
 
 static mobj_t *unusedMobjs = NULL;
 
diff --git a/doomsday/engine/portable/src/sys_network.c b/doomsday/engine/portable/src/sys_network.c
index 9c400a9a88..4926bd674e 100644
--- a/doomsday/engine/portable/src/sys_network.c
+++ b/doomsday/engine/portable/src/sys_network.c
@@ -143,7 +143,7 @@ boolean netServerMode = false;
 static TCPsocket serverSock;
 //static volatile UDPsocket inSock;
 //static Uint16 recvUDPPort;
-static mutex_t mutexInSock;
+//static mutex_t mutexInSock;
 static netnode_t netNodes[MAX_NODES];
 static SDLNet_SocketSet sockSet;
 //static thread_t hTransmitter;