diff --git a/gst/autoplug/gstautoplugcache.c b/gst/autoplug/gstautoplugcache.c
index 3daf7dbd1d..d2f000c954 100644
--- a/gst/autoplug/gstautoplugcache.c
+++ b/gst/autoplug/gstautoplugcache.c
@@ -236,7 +236,7 @@ gst_autoplugcache_loop (GstElement *element)
       if (GST_STATE(cache) != oldstate) {
         gst_object_ref (GST_OBJECT (cache));
         GST_DEBUG(GST_CAT_AUTOPLUG, "state changed during signal, aborting");
-        gst_element_yield (cache);
+        gst_element_yield (GST_ELEMENT (cache));
       }
       gst_object_unref (GST_OBJECT (cache));
     }
diff --git a/gst/autoplug/gstautoplugger.c b/gst/autoplug/gstautoplugger.c
index d60714ba41..7428240398 100644
--- a/gst/autoplug/gstautoplugger.c
+++ b/gst/autoplug/gstautoplugger.c
@@ -94,9 +94,10 @@ static void	gst_autoplugger_external_sink_caps_changed	(GstPad *pad, GstCaps *ca
 static void	gst_autoplugger_external_src_caps_changed	(GstPad *pad, GstCaps *caps, GstAutoplugger *autoplugger);
 static void	gst_autoplugger_external_sink_caps_nego_failed	(GstPad *pad, gboolean *result, GstAutoplugger *autoplugger);
 static void	gst_autoplugger_external_src_caps_nego_failed	(GstPad *pad, gboolean *result, GstAutoplugger *autoplugger);
+/* defined but not used
 static void	gst_autoplugger_external_sink_connected		(GstPad *pad, GstPad *peerpad, GstAutoplugger *autoplugger);
 static void	gst_autoplugger_external_src_connected		(GstPad *pad, GstPad *peerpad, GstAutoplugger *autoplugger);
-
+*/
 static void	gst_autoplugger_cache_first_buffer		(GstElement *element,GstBuffer *buf,GstAutoplugger *autoplugger);
 static void	gst_autoplugger_cache_empty			(GstElement *element, GstAutoplugger *autoplugger);
 static void	gst_autoplugger_typefind_have_type		(GstElement *element, GstCaps *caps, GstAutoplugger *autoplugger);
@@ -200,16 +201,16 @@ gst_autoplugger_init (GstAutoplugger *autoplugger)
   gst_element_add_ghost_pad (GST_ELEMENT(autoplugger), autoplugger->cache_srcpad, "src");
 }
 
-
+/* defined but not used
 G_GNUC_UNUSED static void
 gst_autoplugger_external_sink_connected(GstPad *pad, GstPad *peerpad, GstAutoplugger *autoplugger)
 {
   GstPadTemplate *peertemplate;
   GstCaps *peercaps, *peertemplatecaps;
 
-  GST_INFO(GST_CAT_AUTOPLUG, "have cache:sink connected");
+  GST_INFO(GST_CAT_AUTOPLUG, "have cache:sink connected");*/
 /*  autoplugger->sinkpadpeer = peerpad; */
-
+/*
   if (autoplugger->sinkpadpeer) {
     peercaps = GST_PAD_CAPS(autoplugger->sinkpadpeer);
     if (peercaps)
@@ -232,9 +233,9 @@ gst_autoplugger_external_src_connected(GstPad *pad, GstPad *peerpad, GstAutoplug
   GstPadTemplate *peertemplate;
   GstCaps *peercaps, *peertemplatecaps;
 
-  GST_INFO(GST_CAT_AUTOPLUG, "have cache:src connected");
+  GST_INFO(GST_CAT_AUTOPLUG, "have cache:src connected");*/
 /*  autoplugger->srcpadpeer = peerpad; */
-
+/*
   if (autoplugger->srcpadpeer) {
     peercaps = GST_PAD_CAPS(autoplugger->srcpadpeer);
     if (peercaps)
@@ -246,13 +247,13 @@ gst_autoplugger_external_src_connected(GstPad *pad, GstPad *peerpad, GstAutoplug
       if (peertemplatecaps) {
         GST_INFO(GST_CAT_AUTOPLUG, "there are some caps on this pad's peer's padtemplate %s",
                  gst_caps_get_mime(peertemplatecaps));
-        autoplugger->sinktemplatecaps = peertemplatecaps;
+        autoplugger->sinktemplatecaps = peertemplatecaps;*/
 /*        GST_DEBUG(GST_CAT_AUTOPLUG, "turning on caps nego proxying in cache"); */
 /*        gtk_object_set(G_OBJECT(autoplugger->cache),"caps_proxy",TRUE,NULL);*/
-      }
+/*      }
     }
   }
-}
+}*/
 
 
 static void
diff --git a/gst/autoplug/gstspideridentity.c b/gst/autoplug/gstspideridentity.c
index d5e4f18691..2d5c20cecd 100644
--- a/gst/autoplug/gstspideridentity.c
+++ b/gst/autoplug/gstspideridentity.c
@@ -126,17 +126,17 @@ gst_spider_identity_class_init (GstSpiderIdentityClass *klass)
   gstelement_class->change_state = GST_DEBUG_FUNCPTR(gst_spider_identity_change_state);
   gstelement_class->request_new_pad = GST_DEBUG_FUNCPTR(gst_spider_identity_request_new_pad);
 }
-
+/* defined but not used
 static GstBufferPool*
 gst_spider_identity_get_bufferpool (GstPad *pad)
-{
+{*/
   /* fix me */
-  GstSpiderIdentity *spider_identity;
+/*  GstSpiderIdentity *spider_identity;
 
   spider_identity = GST_SPIDER_IDENTITY (gst_pad_get_parent (pad));
 
   return gst_pad_get_bufferpool (spider_identity->src);
-}
+}*/
 
 static void 
 gst_spider_identity_init (GstSpiderIdentity *ident) 
@@ -188,7 +188,7 @@ gst_spider_identity_chain (GstPad *pad, GstBuffer *buf)
 	if (conn->sink == ident && (GstElement *) conn->src != conn->current)
 	{
 	  gst_element_set_eos (GST_ELEMENT (conn->src));
-          gst_pad_push (conn->src->src, gst_event_new (GST_EVENT_EOS));  
+          gst_pad_push (conn->src->src, GST_BUFFER (gst_event_new (GST_EVENT_EOS)));  
 	}
       }
     }
diff --git a/gst/autoplug/spidertest.c b/gst/autoplug/spidertest.c
index cd5c2c5b64..b46d55629f 100644
--- a/gst/autoplug/spidertest.c
+++ b/gst/autoplug/spidertest.c
@@ -127,7 +127,7 @@ int main(int argc,char *argv[])
     exit (-4);
   }
 
-  gst_bin_use_clock (GST_BIN (bin), gst_system_clock_obtain ());
+/*  gst_bin_use_clock (GST_BIN (bin), gst_system_clock_obtain ());*/
 
   /* start playing */
   gst_element_set_state(bin, GST_STATE_PLAYING);
diff --git a/gst/gstclock.c b/gst/gstclock.c
index 9fc75f4773..c220ea1a3e 100644
--- a/gst/gstclock.c
+++ b/gst/gstclock.c
@@ -423,6 +423,7 @@ gst_clock_notify_async (GstClock *clock, GstClockTime interval,
 		        GstClockCallback func, gpointer user_data) 
 {
   g_warning ("not supported");
+  return NULL;
 }
 
 /**
diff --git a/gst/gstevent.c b/gst/gstevent.c
index 35a878e801..3dbec8ebaf 100644
--- a/gst/gstevent.c
+++ b/gst/gstevent.c
@@ -23,6 +23,7 @@
 
 #include "gst/gstinfo.h"
 #include "gst/gstevent.h"
+#include <string.h>		/* memcpy */
 
 GType _gst_event_type;
 
diff --git a/gst/schedulers/gstfastscheduler.c b/gst/schedulers/gstfastscheduler.c
index 45a1264860..200d3119c2 100644
--- a/gst/schedulers/gstfastscheduler.c
+++ b/gst/schedulers/gstfastscheduler.c
@@ -114,9 +114,9 @@ static void     	gst_fast_scheduler_pad_disconnect 	(GstScheduler *sched, GstPad
 static GstPad*  	gst_fast_scheduler_pad_select 		(GstScheduler *sched, GList *padlist);
 static GstSchedulerState
 			gst_fast_scheduler_iterate    		(GstScheduler *sched);
-
+/* defined but not used
 static void     	gst_fast_scheduler_show  		(GstScheduler *sched);
-
+*/
 static GstSchedulerClass *parent_class = NULL;
 
 static GType
@@ -283,7 +283,6 @@ gst_fast_scheduler_getfunc_proxy (GstPad *pad)
 static gboolean
 gst_fast_scheduler_cothreaded_element (GstBin * bin, GstElement *element)
 {
-  GList *elements;
   cothread_func wrapper_function;
   GList *pads;
 
@@ -636,9 +635,7 @@ static void
 gst_fast_scheduler_reset (GstScheduler *sched)
 {
   cothread_context *ctx;
-  GstBin *bin = GST_BIN (GST_SCHEDULER_PARENT (sched));
   GList *elements = GST_FAST_SCHEDULER_CAST (sched)->elements;
-  GstFastScheduler *bsched = GST_FAST_SCHEDULER (sched);
 
   while (elements) {
     GST_ELEMENT_THREADSTATE (elements->data) = NULL;
@@ -858,7 +855,6 @@ gst_fast_scheduler_pad_connect (GstScheduler * sched, GstPad *srcpad, GstPad *si
 static void
 gst_fast_scheduler_pad_disconnect (GstScheduler * sched, GstPad * srcpad, GstPad * sinkpad)
 {
-  GstSchedulerChain *chain;
   GstElement *element1, *element2;
   GstSchedulerChain *chain1, *chain2;
   GstFastScheduler *bsched = GST_FAST_SCHEDULER (sched);
@@ -905,7 +901,6 @@ static GstPad *
 gst_fast_scheduler_pad_select (GstScheduler * sched, GList * padlist)
 {
   GstPad *pad = NULL;
-  GList *padlist2 = padlist;
 
   GST_INFO (GST_CAT_SCHEDULING, "imlement me!!");
 
@@ -918,8 +913,6 @@ gst_fast_scheduler_iterate (GstScheduler * sched)
   GstBin *bin = GST_BIN (sched->parent);
   GList *chains;
   GstSchedulerChain *chain;
-  GstElement *entry;
-  GList *elements;
   gint scheduled = 0;
   GstFastScheduler *bsched = GST_FAST_SCHEDULER (sched);
   GstSchedulerState state;
@@ -1039,7 +1032,7 @@ exit:
   return state;
 }
 
-
+/* defined but not used
 static void
 gst_fast_scheduler_show (GstScheduler * sched)
 {
@@ -1093,3 +1086,4 @@ gst_fast_scheduler_show (GstScheduler * sched)
     g_print ("\n");
   }
 }
+*/
diff --git a/libs/gst/bytestream/bstest.c b/libs/gst/bytestream/bstest.c
index 7fe35b3fd3..bdfb894207 100644
--- a/libs/gst/bytestream/bstest.c
+++ b/libs/gst/bytestream/bstest.c
@@ -215,6 +215,8 @@ gst_identity_loop (GstElement *element)
     }
 
     exit(1);
+    /* implicit declaration of function `GST_ELEMENT_IS_COTHREAD_STOPPING' */
+    #define GST_ELEMENT_IS_COTHREAD_STOPPING(element) GST_FLAG_IS_SET((element), GST_ELEMENT_SCHEDULER_PRIVATE1)
   } while (!GST_ELEMENT_IS_COTHREAD_STOPPING(element));
 /**/
 }
diff --git a/tests/bufspeed/gstmempool.c b/tests/bufspeed/gstmempool.c
index ffd5862c58..2e967c4c50 100644
--- a/tests/bufspeed/gstmempool.c
+++ b/tests/bufspeed/gstmempool.c
@@ -1,4 +1,5 @@
 #include "gstmempool.h"
+#include <string.h>		/* memset */
 
 #ifdef __SMP__
 #define POOL_LOCK "lock ; "
diff --git a/tests/bufspeed/test1.c b/tests/bufspeed/test1.c
index 7bedae68d8..aef66860a0 100644
--- a/tests/bufspeed/test1.c
+++ b/tests/bufspeed/test1.c
@@ -1,4 +1,5 @@
 #include "gstbuffer.h"
+#include <gst/gst.h>
 
 int 
 main (int argc, char *argv[])
diff --git a/tests/lat.c b/tests/lat.c
index 8b8a9950bb..eb08877b03 100644
--- a/tests/lat.c
+++ b/tests/lat.c
@@ -1,5 +1,6 @@
 #include <gst/gst.h>
 #include <stdlib.h>
+#include <string.h>
 
 /* FIXME: WTF does this do? */
 
diff --git a/tests/memchunk/gmemchunktest.c b/tests/memchunk/gmemchunktest.c
index b3301f13dd..fe36e1a4f7 100644
--- a/tests/memchunk/gmemchunktest.c
+++ b/tests/memchunk/gmemchunktest.c
@@ -1,4 +1,5 @@
 #include <gst/gst.h>
+#include <string.h>		/* strerror */
 
 #define MAX_THREADS  100
 
diff --git a/tests/memchunk/gstmemchunk.c b/tests/memchunk/gstmemchunk.c
index f51e7d6295..26b46643b3 100644
--- a/tests/memchunk/gstmemchunk.c
+++ b/tests/memchunk/gstmemchunk.c
@@ -1,4 +1,5 @@
 #include "gstmemchunk.h"
+#include <string.h>		/* memset */
 
 #ifdef __SMP__
 #define CHUNK_LOCK "lock ; "
diff --git a/tests/memchunk/gstmemchunktest.c b/tests/memchunk/gstmemchunktest.c
index 05acccb104..267503e4ba 100644
--- a/tests/memchunk/gstmemchunktest.c
+++ b/tests/memchunk/gstmemchunktest.c
@@ -1,5 +1,6 @@
 #include <gst/gst.h>
 #include "gstmemchunk.h"
+#include <string.h>		/* strerror */
 
 #define MAX_THREADS  100
 
diff --git a/tools/gst-launch.c b/tools/gst-launch.c
index c8d769462a..3890b01dfe 100644
--- a/tools/gst-launch.c
+++ b/tools/gst-launch.c
@@ -165,9 +165,9 @@ main(int argc, char *argv[])
   argvn = g_new0 (char *,argc);
   memcpy (argvn, argv+1, sizeof (char*) * (argc-1));
   if (strstr (argv[0], "gst-xmllaunch")) {
-    pipeline = xmllaunch_parse_cmdline (argvn);
+    pipeline = xmllaunch_parse_cmdline ((const gchar **) argvn);
   } else {
-    pipeline = (GstElement*) gst_parse_launchv (argvn);
+    pipeline = (GstElement*) gst_parse_launchv ((const gchar **) argvn);
   }
 
   if (!pipeline) {