diff --git a/spa/include/spa/graph/graph-scheduler1.h b/spa/include/spa/graph/graph-scheduler1.h
index 8f3f62174..72c2e7049 100644
--- a/spa/include/spa/graph/graph-scheduler1.h
+++ b/spa/include/spa/graph/graph-scheduler1.h
@@ -134,28 +134,28 @@ static inline bool spa_graph_data_iterate(struct spa_graph_data *data)
 
 static inline int spa_graph_impl_need_input(void *data, struct spa_graph_node *node)
 {
-	struct spa_graph_data *d = data;
+	struct spa_graph_data *d = (struct spa_graph_data *) data;
 	spa_debug("node %p start pull", node);
 	node->state = SPA_GRAPH_STATE_CHECK_IN;
 	d->node = node;
 	if (node->ready_link.next == NULL)
 		spa_list_append(&d->ready, &node->ready_link);
 
-	while(spa_graph_data_iterate(data));
+	while(spa_graph_data_iterate(d));
 
 	return 0;
 }
 
 static inline int spa_graph_impl_have_output(void *data, struct spa_graph_node *node)
 {
-	struct spa_graph_data *d = data;
+	struct spa_graph_data *d = (struct spa_graph_data *) data;
 	spa_debug("node %p start push", node);
 	node->state = SPA_GRAPH_STATE_OUT;
 	d->node = node;
 	if (node->ready_link.next == NULL)
 		spa_list_append(&d->ready, &node->ready_link);
 
-	while(spa_graph_data_iterate(data));
+	while(spa_graph_data_iterate(d));
 
 	return 0;
 }
diff --git a/spa/include/spa/pod/parser.h b/spa/include/spa/pod/parser.h
index b88f80da2..7550ec128 100644
--- a/spa/include/spa/pod/parser.h
+++ b/spa/include/spa/pod/parser.h
@@ -116,13 +116,14 @@ do {											\
 	case 's':									\
 		*va_arg(args, char**) =							\
 			(pod == NULL || (SPA_POD_TYPE(pod) == SPA_POD_TYPE_NONE)	\
-				? NULL : SPA_POD_CONTENTS(struct spa_pod_string, pod));	\
+				? NULL							\
+				: (char *)SPA_POD_CONTENTS(struct spa_pod_string, pod));	\
 		break;									\
 	case 'S':									\
 	{										\
 		char *dest = va_arg(args, char*);					\
 		uint32_t maxlen = va_arg(args, uint32_t);				\
-		strncpy(dest, SPA_POD_CONTENTS(struct spa_pod_string, pod), maxlen-1);	\
+		strncpy(dest, (char *)SPA_POD_CONTENTS(struct spa_pod_string, pod), maxlen-1);	\
 		break;									\
 	}										\
 	case 'z':									\
@@ -139,11 +140,12 @@ do {											\
 		break;									\
 	case 'B':									\
 		*va_arg(args, uint32_t **) =						\
-				SPA_POD_CONTENTS(struct spa_pod_bitmap, pod);		\
+			(uint32_t *) SPA_POD_CONTENTS(struct spa_pod_bitmap, pod);	\
 		break;									\
 	case 'p':									\
 	{										\
-		struct spa_pod_pointer_body *b = SPA_POD_BODY(pod);			\
+		struct spa_pod_pointer_body *b =					\
+				(struct spa_pod_pointer_body *) SPA_POD_BODY(pod);	\
 		*(va_arg(args, void **)) = b->value;					\
 		break;									\
 	}										\
@@ -247,7 +249,7 @@ static inline int spa_pod_parser_getv(struct spa_pod_parser *parser,
 		case ':':
 		{
 			uint32_t key = va_arg(args, uint32_t);
-			const struct spa_pod *obj = parser->iter[parser->depth].data;
+			const struct spa_pod *obj = (const struct spa_pod *) parser->iter[parser->depth].data;
 
 			prop = spa_pod_find_prop(obj, key);
 			if (prop != NULL && (prop->body.flags & SPA_POD_PROP_FLAG_UNSET) == 0)
diff --git a/spa/include/spa/support/log-impl.h b/spa/include/spa/support/log-impl.h
index c69224e2e..df63f74b4 100644
--- a/spa/include/spa/support/log-impl.h
+++ b/spa/include/spa/support/log-impl.h
@@ -24,6 +24,8 @@
 extern "C" {
 #endif
 
+#include <stdio.h>
+
 #include <spa/support/log.h>
 
 static inline void spa_log_impl_logv(struct spa_log *log,
diff --git a/spa/include/spa/support/type-map-impl.h b/spa/include/spa/support/type-map-impl.h
index b6e0aad9c..d5416a37f 100644
--- a/spa/include/spa/support/type-map-impl.h
+++ b/spa/include/spa/support/type-map-impl.h
@@ -26,10 +26,16 @@ extern "C" {
 
 #include <spa/support/type-map.h>
 
+struct spa_type_map_impl_data {
+	struct spa_type_map map;
+	unsigned int n_types;
+	char **types;
+};
+
 static inline uint32_t
 spa_type_map_impl_get_id (struct spa_type_map *map, const char *type)
 {
-	struct { struct spa_type_map map; uint32_t n_types; char *types[1]; } *impl = (void*) map;
+	struct spa_type_map_impl_data *impl = (struct spa_type_map_impl_data *) map;
 	uint32_t i = 0;
 
 	for (i = 1; i <= impl->n_types; i++) {
@@ -44,7 +50,7 @@ spa_type_map_impl_get_id (struct spa_type_map *map, const char *type)
 static inline const char *
 spa_type_map_impl_get_type (const struct spa_type_map *map, uint32_t id)
 {
-	struct { struct spa_type_map map; uint32_t n_types; char *types[1]; } *impl = (void*) map;
+	struct spa_type_map_impl_data *impl = (struct spa_type_map_impl_data *) map;
         if (id <= impl->n_types)
                 return impl->types[id];
         return NULL;
@@ -52,7 +58,7 @@ spa_type_map_impl_get_type (const struct spa_type_map *map, uint32_t id)
 
 static inline size_t spa_type_map_impl_get_size (const struct spa_type_map *map)
 {
-	struct { struct spa_type_map map; uint32_t n_types; char *types[1]; } *impl = (void*) map;
+	struct spa_type_map_impl_data *impl = (struct spa_type_map_impl_data *) map;
 	return impl->n_types;
 }
 
diff --git a/spa/include/spa/utils/ringbuffer.h b/spa/include/spa/utils/ringbuffer.h
index 36df4f231..ade6a7e2a 100644
--- a/spa/include/spa/utils/ringbuffer.h
+++ b/spa/include/spa/utils/ringbuffer.h
@@ -97,9 +97,9 @@ spa_ringbuffer_read_data(struct spa_ringbuffer *rbuf,
 			 uint32_t offset, void *data, uint32_t len)
 {
 	uint32_t l0 = SPA_MIN(len, size - offset), l1 = len - l0;
-	memcpy(data, buffer + offset, l0);
+	memcpy(data, SPA_MEMBER(buffer, offset, void), l0);
 	if (SPA_UNLIKELY(l1 > 0))
-		memcpy(data + l0, buffer, l1);
+		memcpy(SPA_MEMBER(data, l0, void), buffer, l1);
 }
 
 /**
@@ -147,9 +147,9 @@ spa_ringbuffer_write_data(struct spa_ringbuffer *rbuf,
 			  uint32_t offset, const void *data, uint32_t len)
 {
 	uint32_t l0 = SPA_MIN(len, size - offset), l1 = len - l0;
-	memcpy(buffer + offset, data, l0);
+	memcpy(SPA_MEMBER(buffer, offset, void), data, l0);
 	if (SPA_UNLIKELY(l1 > 0))
-		memcpy(buffer, data + l0, l1);
+		memcpy(buffer, SPA_MEMBER(data, l0, void), l1);
 }
 
 /**