diff --git a/build_files/cmake/macros.cmake b/build_files/cmake/macros.cmake
index 564dbea2c82..f34c88214a9 100644
--- a/build_files/cmake/macros.cmake
+++ b/build_files/cmake/macros.cmake
@@ -239,8 +239,7 @@ macro(setup_liblinks
 			${OPENGL_glu_LIBRARY}
 			${PNG_LIBRARIES}
 			${ZLIB_LIBRARIES}
-			${FREETYPE_LIBRARY}
-			${LAPACK_LIBRARIES})
+			${FREETYPE_LIBRARY})
 
 	# since we are using the local libs for python when compiling msvc projects, we need to add _d when compiling debug versions
 	if(WITH_PYTHON)  # AND NOT WITH_PYTHON_MODULE  # WIN32 needs
@@ -352,7 +351,9 @@ macro(setup_liblinks
 	if(WITH_INPUT_NDOF)
 		target_link_libraries(${target} ${NDOF_LIBRARIES})
 	endif()
-
+	if(WITH_MOD_CLOTH_ELTOPO)
+		target_link_libraries(${target} ${LAPACK_LIBRARIES})
+	endif()
 	if(WIN32 AND NOT UNIX)
 		target_link_libraries(${target} ${PTHREADS_LIBRARIES})
 	endif()
@@ -458,6 +459,12 @@ macro(remove_strict_flags)
 		add_cc_flag("${CC_REMOVE_STRICT_FLAGS}")
 	endif()
 
+	if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+		remove_cc_flag("-Wunused-parameter")
+		remove_cc_flag("-Wunused-variable")
+		remove_cc_flag("-Werror")
+	endif()
+
 	if(MSVC)
 		# TODO
 	endif()
diff --git a/intern/guardedalloc/cpp/mallocn.cpp b/intern/guardedalloc/cpp/mallocn.cpp
index 21f5e323cf2..da77f0e1c83 100644
--- a/intern/guardedalloc/cpp/mallocn.cpp
+++ b/intern/guardedalloc/cpp/mallocn.cpp
@@ -29,33 +29,33 @@
 #include "../MEM_guardedalloc.h"
 
 /* not default but can be used when needing to set a string */
-void *operator new(size_t size, const char *str)
+void *operator new(size_t size, const char *str) throw(std::bad_alloc)
 {
 	return MEM_mallocN(size, str);
 }
-void *operator new[](size_t size, const char *str)
+void *operator new[](size_t size, const char *str) throw(std::bad_alloc)
 {
 	return MEM_mallocN(size, str);
 }
 
 
-void *operator new(size_t size)
+void *operator new(size_t size) throw(std::bad_alloc)
 {
 	return MEM_mallocN(size, "C++/anonymous");
 }
-void *operator new[](size_t size)
+void *operator new[](size_t size) throw(std::bad_alloc)
 {
 	return MEM_mallocN(size, "C++/anonymous[]");
 }
 
 
-void operator delete(void *p)
+void operator delete(void *p) throw()
 {
 	/* delete NULL is valid in c++ */
 	if (p)
 		MEM_freeN(p);
 }
-void operator delete[](void *p)
+void operator delete[](void *p) throw()
 {
 	/* delete NULL is valid in c++ */
 	if (p)
diff --git a/source/blender/compositor/intern/COM_MemoryProxy.h b/source/blender/compositor/intern/COM_MemoryProxy.h
index f02da215b5f..130c5f5057a 100644
--- a/source/blender/compositor/intern/COM_MemoryProxy.h
+++ b/source/blender/compositor/intern/COM_MemoryProxy.h
@@ -50,12 +50,12 @@ private:
 	/**
 	 * @brief datatype of this MemoryProxy
 	 */
-	DataType m_datatype;
+	/* DataType m_datatype; */ /* UNUSED */
 	
 	/**
 	 * @brief channel information of this buffer
 	 */
-	ChannelInfo m_channelInfo[COM_NUMBER_OF_CHANNELS];
+	/* ChannelInfo m_channelInfo[COM_NUMBER_OF_CHANNELS]; */ /* UNUSED */
 
 	/**
 	 * @brief the allocated memory
diff --git a/source/blender/compositor/operations/COM_BlurBaseOperation.cpp b/source/blender/compositor/operations/COM_BlurBaseOperation.cpp
index d1ddecc0df6..696c0748d69 100644
--- a/source/blender/compositor/operations/COM_BlurBaseOperation.cpp
+++ b/source/blender/compositor/operations/COM_BlurBaseOperation.cpp
@@ -27,8 +27,9 @@ extern "C" {
 	#include "RE_pipeline.h"
 }
 
-BlurBaseOperation::BlurBaseOperation(DataType data_type=COM_DT_COLOR) : NodeOperation()
+BlurBaseOperation::BlurBaseOperation(DataType data_type) : NodeOperation()
 {
+	/* data_type is almost always COM_DT_COLOR except for alpha-blur */
 	this->addInputSocket(data_type);
 	this->addInputSocket(COM_DT_VALUE);
 	this->addOutputSocket(data_type);
diff --git a/source/blender/compositor/operations/COM_ChannelMatteOperation.h b/source/blender/compositor/operations/COM_ChannelMatteOperation.h
index 859df200020..5bc13736dda 100644
--- a/source/blender/compositor/operations/COM_ChannelMatteOperation.h
+++ b/source/blender/compositor/operations/COM_ChannelMatteOperation.h
@@ -32,7 +32,7 @@ class ChannelMatteOperation : public NodeOperation {
 private:
 	SocketReader *m_inputImageProgram;
 
-	int m_color_space;   /* node->custom1 */
+	/* int m_color_space; */  /* node->custom1 */ /* UNUSED */ /* TODO ? */
 	int m_matte_channel; /* node->custom2 */
 	int m_limit_method;  /* node->algorithm */
 	int m_limit_channel; /* node->channel */
diff --git a/source/blender/editors/interface/view2d.c b/source/blender/editors/interface/view2d.c
index 9a783b461a0..6dbf53cba72 100644
--- a/source/blender/editors/interface/view2d.c
+++ b/source/blender/editors/interface/view2d.c
@@ -1346,7 +1346,7 @@ void UI_view2d_multi_grid_draw(View2D *v2d, float step, int level_size, int totl
 		
 		glBegin(GL_LINES);
 		for (; start < v2d->cur.xmax; start += lstep, ++i) {
-			if (i == 0 || (level < totlevels-1 && i % level_size == 0))
+			if (i == 0 || (level < totlevels - 1 && i % level_size == 0))
 				continue;
 			glVertex2f(start, v2d->cur.ymin);
 			glVertex2f(start, v2d->cur.ymax);
@@ -1356,14 +1356,14 @@ void UI_view2d_multi_grid_draw(View2D *v2d, float step, int level_size, int totl
 		start = i * lstep;
 		
 		for (; start < v2d->cur.ymax; start += lstep, ++i) {
-			if (i == 0 || (level < totlevels-1 && i % level_size == 0))
+			if (i == 0 || (level < totlevels - 1 && i % level_size == 0))
 				continue;
 			glVertex2f(v2d->cur.xmin, start);
 			glVertex2f(v2d->cur.xmax, start);
 		}
 		
 		/* X and Y axis */
-		UI_ThemeColorShade(TH_BACK, offset-8);
+		UI_ThemeColorShade(TH_BACK, offset - 8);
 		glVertex2f(0.0f, v2d->cur.ymin);
 		glVertex2f(0.0f, v2d->cur.ymax);
 		glVertex2f(v2d->cur.xmin, 0.0f);
diff --git a/source/blender/editors/transform/transform.c b/source/blender/editors/transform/transform.c
index 4dee3514142..928b9c2fc62 100644
--- a/source/blender/editors/transform/transform.c
+++ b/source/blender/editors/transform/transform.c
@@ -4992,6 +4992,7 @@ void projectSVData(TransInfo *t, int final)
 	BMEditMesh *em = sld->em;
 	SmallHash visit;
 	int i;
+	short has_uv;
 
 	if (!em)
 		return;
@@ -5004,6 +5005,8 @@ void projectSVData(TransInfo *t, int final)
 	if (em->bm->shapenr > 1)
 		return;
 
+	has_uv = CustomData_has_layer(&(em->bm->ldata), CD_MLOOPUV);
+
 	BLI_smallhash_init(&visit);
 	
 	for (i = 0, sv = sld->sv; i < sld->totsv; sv++, i++) {
@@ -5011,8 +5014,6 @@ void projectSVData(TransInfo *t, int final)
 		BMFace *f;
 		BMIter liter_v;
 		BMLoop *l_v;
-		float uv_med[2] = {0.0, 0.0};
-		int tot_loops = 0;
 		
 		/* BMESH_TODO, this interpolates between vertex/loops which are not moved
 		 * (are only apart of a face attached to a slide vert), couldn't we iterate BM_LOOPS_OF_VERT
@@ -5141,17 +5142,22 @@ void projectSVData(TransInfo *t, int final)
 
 		/* make sure every loop of the vertex has identical uv data. Use this temporarily to
 		 * fix #31581 until proper data correction/ support for islands is done */
-		BM_ITER_ELEM (l_v, &liter_v, sv->v, BM_LOOPS_OF_VERT) {
-			MLoopUV *uv = CustomData_bmesh_get(&em->bm->ldata, l_v->head.data, CD_MLOOPUV);
-			add_v2_v2(uv_med, uv->uv);
-			tot_loops++;
-		}
+		/* XXX - this only does the active UV layer which is not really good, should do _all_ uv's - campbell */
+		if (has_uv) {
+			float uv_med[2] = {0.0, 0.0};
+			int tot_loops = 0;
+			BM_ITER_ELEM (l_v, &liter_v, sv->v, BM_LOOPS_OF_VERT) {
+				MLoopUV *uv = CustomData_bmesh_get(&em->bm->ldata, l_v->head.data, CD_MLOOPUV);
+				add_v2_v2(uv_med, uv->uv);
+				tot_loops++;
+			}
 
-		mul_v2_fl(uv_med, 1.0/tot_loops);
+			mul_v2_fl(uv_med, 1.0/tot_loops);
 
-		BM_ITER_ELEM (l_v, &liter_v, sv->v, BM_LOOPS_OF_VERT) {
-			MLoopUV *uv = CustomData_bmesh_get(&em->bm->ldata, l_v->head.data, CD_MLOOPUV);
-			copy_v2_v2(uv->uv, uv_med);
+			BM_ITER_ELEM (l_v, &liter_v, sv->v, BM_LOOPS_OF_VERT) {
+				MLoopUV *uv = CustomData_bmesh_get(&em->bm->ldata, l_v->head.data, CD_MLOOPUV);
+				copy_v2_v2(uv->uv, uv_med);
+			}
 		}
 	}
 
diff --git a/source/blender/makesrna/intern/makesrna.c b/source/blender/makesrna/intern/makesrna.c
index 9cab08cbc34..32ca1bca107 100644
--- a/source/blender/makesrna/intern/makesrna.c
+++ b/source/blender/makesrna/intern/makesrna.c
@@ -51,6 +51,13 @@
 #  define __func__ __FUNCTION__
 #endif
 
+/* copied from BKE_utildefines.h ugh */
+#ifdef __GNUC__
+#  define UNUSED(x) UNUSED_ ## x __attribute__((__unused__))
+#else
+#  define UNUSED(x) x
+#endif
+
 /* Replace if different */
 #define TMP_EXT ".tmp"
 
@@ -310,7 +317,7 @@ static void rna_print_data_get(FILE *f, PropertyDefRNA *dp)
 		fprintf(f, "	%s *data= (%s*)(ptr->data);\n", dp->dnastructname, dp->dnastructname);
 }
 
-static void rna_print_id_get(FILE *f, PropertyDefRNA *dp)
+static void rna_print_id_get(FILE *f, PropertyDefRNA *UNUSED(dp))
 {
 	fprintf(f, "	ID *id= ptr->id.data;\n");
 }
@@ -1179,7 +1186,7 @@ static char *rna_def_property_lookup_int_func(FILE *f, StructRNA *srna, Property
 	return func;
 }
 
-static char *rna_def_property_next_func(FILE *f, StructRNA *srna, PropertyRNA *prop, PropertyDefRNA *dp,
+static char *rna_def_property_next_func(FILE *f, StructRNA *srna, PropertyRNA *prop, PropertyDefRNA *UNUSED(dp),
                                         const char *manualfunc)
 {
 	char *func, *getfunc;
@@ -1206,7 +1213,7 @@ static char *rna_def_property_next_func(FILE *f, StructRNA *srna, PropertyRNA *p
 	return func;
 }
 
-static char *rna_def_property_end_func(FILE *f, StructRNA *srna, PropertyRNA *prop, PropertyDefRNA *dp,
+static char *rna_def_property_end_func(FILE *f, StructRNA *srna, PropertyRNA *prop, PropertyDefRNA *UNUSED(dp),
                                        const char *manualfunc)
 {
 	char *func;
@@ -2006,7 +2013,7 @@ static void rna_generate_blender(BlenderRNA *brna, FILE *f)
 	fprintf(f, "};\n\n");
 }
 
-static void rna_generate_property_prototypes(BlenderRNA *brna, StructRNA *srna, FILE *f)
+static void rna_generate_property_prototypes(BlenderRNA *UNUSED(brna), StructRNA *srna, FILE *f)
 {
 	PropertyRNA *prop;
 	StructRNA *base;
@@ -2029,7 +2036,7 @@ static void rna_generate_property_prototypes(BlenderRNA *brna, StructRNA *srna,
 	fprintf(f, "\n");
 }
 
-static void rna_generate_parameter_prototypes(BlenderRNA *brna, StructRNA *srna, FunctionRNA *func, FILE *f)
+static void rna_generate_parameter_prototypes(BlenderRNA *UNUSED(brna), StructRNA *srna, FunctionRNA *func, FILE *f)
 {
 	PropertyRNA *parm;
 
@@ -2068,7 +2075,7 @@ static void rna_generate_function_prototypes(BlenderRNA *brna, StructRNA *srna,
 		fprintf(f, "\n");
 }
 
-static void rna_generate_static_parameter_prototypes(BlenderRNA *brna, StructRNA *srna, FunctionDefRNA *dfunc, FILE *f)
+static void rna_generate_static_parameter_prototypes(BlenderRNA *UNUSED(brna), StructRNA *srna, FunctionDefRNA *dfunc, FILE *f)
 {
 	FunctionRNA *func;
 	PropertyDefRNA *dparm;
@@ -2483,7 +2490,7 @@ static void rna_generate_property(FILE *f, StructRNA *srna, const char *nest, Pr
 	}
 }
 
-static void rna_generate_struct(BlenderRNA *brna, StructRNA *srna, FILE *f)
+static void rna_generate_struct(BlenderRNA *UNUSED(brna), StructRNA *srna, FILE *f)
 {
 	FunctionRNA *func;
 	FunctionDefRNA *dfunc;
@@ -2761,7 +2768,7 @@ static void rna_generate(BlenderRNA *brna, FILE *f, const char *filename, const
 	}
 }
 
-static void rna_generate_header(BlenderRNA *brna, FILE *f)
+static void rna_generate_header(BlenderRNA *UNUSED(brna), FILE *f)
 {
 	StructDefRNA *ds;
 	PropertyDefRNA *dp;
@@ -2929,7 +2936,7 @@ static const char *cpp_classes = ""
 "};\n"
 "\n";
 
-static void rna_generate_header_cpp(BlenderRNA *brna, FILE *f)
+static void rna_generate_header_cpp(BlenderRNA *UNUSED(brna), FILE *f)
 {
 	StructDefRNA *ds;
 	PropertyDefRNA *dp;
diff --git a/source/blender/makesrna/intern/rna_define.c b/source/blender/makesrna/intern/rna_define.c
index 02d8cbef4a3..7a92ac56006 100644
--- a/source/blender/makesrna/intern/rna_define.c
+++ b/source/blender/makesrna/intern/rna_define.c
@@ -497,6 +497,9 @@ void RNA_struct_free_extension(StructRNA *srna, ExtensionRNA *ext)
 	ext->free(ext->data);                     /* decref's the PyObject that the srna owns */
 	RNA_struct_blender_type_set(srna, NULL);  /* this gets accessed again - XXX fixme */
 	RNA_struct_py_type_set(srna, NULL);       /* NULL the srna's value so RNA_struct_free wont complain of a leak */
+#else
+	(void)srna;
+	(void)ext;
 #endif
 }
 
diff --git a/source/blender/makesrna/intern/rna_scene.c b/source/blender/makesrna/intern/rna_scene.c
index 072df099cea..7a2f0736e98 100644
--- a/source/blender/makesrna/intern/rna_scene.c
+++ b/source/blender/makesrna/intern/rna_scene.c
@@ -736,7 +736,7 @@ static void rna_ImageFormatSettings_file_format_set(PointerRNA *ptr, int value)
 }
 
 static EnumPropertyItem *rna_ImageFormatSettings_file_format_itemf(bContext *C, PointerRNA *ptr,
-                                                                   PropertyRNA *UNUSED(prop), int *free)
+                                                                   PropertyRNA *UNUSED(prop), int *UNUSED(free))
 {
 	ID *id = ptr->id.data;
 	if (id && GS(id->name) == ID_SCE) {
diff --git a/source/blender/makesrna/intern/rna_sensor.c b/source/blender/makesrna/intern/rna_sensor.c
index cce0612bd68..00e8ed5289f 100644
--- a/source/blender/makesrna/intern/rna_sensor.c
+++ b/source/blender/makesrna/intern/rna_sensor.c
@@ -231,7 +231,7 @@ static void rna_Sensor_level_set(struct PointerRNA *ptr, int value)
 		sens->tap = 0;
 }
 
-static void rna_Sensor_Armature_update(Main *bmain, Scene *scene, PointerRNA *ptr)
+static void rna_Sensor_Armature_update(Main *UNUSED(bmain), Scene *UNUSED(scene), PointerRNA *ptr)
 {
 	bSensor *sens = (bSensor *)ptr->data;
 	bArmatureSensor *as = sens->data;
diff --git a/source/blender/makesrna/intern/rna_sequencer_api.c b/source/blender/makesrna/intern/rna_sequencer_api.c
index 3a534cd22b4..6c54b7c2cf3 100644
--- a/source/blender/makesrna/intern/rna_sequencer_api.c
+++ b/source/blender/makesrna/intern/rna_sequencer_api.c
@@ -99,7 +99,7 @@ static Sequence *alloc_generic_sequence(Editing *ed, const char *name, int start
 	return seq;
 }
 
-static Sequence *rna_Sequences_new_clip(ID *id, Editing *ed, ReportList *reports,
+static Sequence *rna_Sequences_new_clip(ID *id, Editing *ed,
                                         const char *name, MovieClip *clip, int channel,
                                         int start_frame)
 {
@@ -118,7 +118,7 @@ static Sequence *rna_Sequences_new_clip(ID *id, Editing *ed, ReportList *reports
 	return seq;
 }
 
-static Sequence *rna_Sequences_new_mask(ID *id, Editing *ed, ReportList *reports,
+static Sequence *rna_Sequences_new_mask(ID *id, Editing *ed,
                                         const char *name, Mask *mask, int channel,
                                         int start_frame)
 {
@@ -137,7 +137,7 @@ static Sequence *rna_Sequences_new_mask(ID *id, Editing *ed, ReportList *reports
 	return seq;
 }
 
-static Sequence *rna_Sequences_new_scene(ID *id, Editing *ed, ReportList *reports,
+static Sequence *rna_Sequences_new_scene(ID *id, Editing *ed,
                                          const char *name, Scene *sce_seq, int channel,
                                          int start_frame)
 {
@@ -455,7 +455,7 @@ void RNA_api_sequences(BlenderRNA *brna, PropertyRNA *cprop)
 	RNA_def_struct_ui_text(srna, "Sequences", "Collection of Sequences");
 
 	func = RNA_def_function(srna, "new_clip", "rna_Sequences_new_clip");
-	RNA_def_function_flag(func, FUNC_USE_REPORTS | FUNC_USE_SELF_ID);
+	RNA_def_function_flag(func, FUNC_USE_SELF_ID);
 	RNA_def_function_ui_description(func, "Add a new movie clip sequence");
 	parm = RNA_def_string(func, "name", "Name", 0, "", "New name for the sequence");
 	RNA_def_property_flag(parm, PROP_REQUIRED);
@@ -472,7 +472,7 @@ void RNA_api_sequences(BlenderRNA *brna, PropertyRNA *cprop)
 	RNA_def_function_return(func, parm);
 
 	func = RNA_def_function(srna, "new_mask", "rna_Sequences_new_mask");
-	RNA_def_function_flag(func, FUNC_USE_REPORTS | FUNC_USE_SELF_ID);
+	RNA_def_function_flag(func, FUNC_USE_SELF_ID);
 	RNA_def_function_ui_description(func, "Add a new movie clip sequence");
 	parm = RNA_def_string(func, "name", "Name", 0, "", "New name for the sequence");
 	RNA_def_property_flag(parm, PROP_REQUIRED);
@@ -489,7 +489,7 @@ void RNA_api_sequences(BlenderRNA *brna, PropertyRNA *cprop)
 	RNA_def_function_return(func, parm);
 
 	func = RNA_def_function(srna, "new_scene", "rna_Sequences_new_scene");
-	RNA_def_function_flag(func, FUNC_USE_REPORTS | FUNC_USE_SELF_ID);
+	RNA_def_function_flag(func, FUNC_USE_SELF_ID);
 	RNA_def_function_ui_description(func, "Add a new scene sequence");
 	parm = RNA_def_string(func, "name", "Name", 0, "", "New name for the sequence");
 	RNA_def_property_flag(parm, PROP_REQUIRED);
diff --git a/source/blender/render/intern/raytrace/bvh.h b/source/blender/render/intern/raytrace/bvh.h
index fab0bb94618..9318e1758a6 100644
--- a/source/blender/render/intern/raytrace/bvh.h
+++ b/source/blender/render/intern/raytrace/bvh.h
@@ -75,7 +75,7 @@ inline int test_bb_group4(__m128 *bb_group, const Isect *isec)
  * Based on Tactical Optimization of Ray/Box Intersection, by Graham Fyffe
  *  [http://tog.acm.org/resources/RTNews/html/rtnv21n1.html#art9]
  */
-static int rayobject_bb_intersect_test(const Isect *isec, const float *_bb)
+static inline int rayobject_bb_intersect_test(const Isect *isec, const float *_bb)
 {
 	const float *bb = _bb;