diff --git a/meson.build b/meson.build
index 2acf85e28..bcdae9fc3 100644
--- a/meson.build
+++ b/meson.build
@@ -2,7 +2,7 @@ project('pipewire', ['c' ],
   version : '0.3.2',
   license : 'MIT',
   meson_version : '>= 0.50.0',
-  default_options : [ 'warning_level=1',
+  default_options : [ 'warning_level=3',
                       'c_std=gnu99',
                       'buildtype=debugoptimized' ])
 
@@ -54,14 +54,28 @@ if cc.get_id() == 'gcc'
 			'-Wformat-security',
 			'-Werror=suggest-attribute=format',
 			'-Wmissing-braces',
-		        '-Wno-missing-field-initializers',
-		        '-Wno-unused-parameter',
 			'-Wtype-limits',
 			'-Wold-style-declaration',
 			'-Wvariadic-macros',
-#			'-DSPA_DEBUG_MEMCPY',
+		        '-Wno-missing-field-initializers',
+		        '-Wno-unused-parameter',
+			'-Wno-pedantic',
 			'-DFASTPATH',
+#			'-DSPA_DEBUG_MEMCPY',
 			language : 'c')
+  add_global_arguments('-fvisibility=hidden',
+			'-Wsign-compare',
+			'-Wimplicit-fallthrough',
+			'-Wpointer-arith',
+			'-Wformat-security',
+			'-Werror=suggest-attribute=format',
+			'-Wmissing-braces',
+			'-Wtype-limits',
+			'-Wvariadic-macros',
+		        '-Wno-missing-field-initializers',
+		        '-Wno-unused-parameter',
+			'-Wno-pedantic',
+			language : 'cpp')
 endif
 
 sse_args = '-msse'
diff --git a/spa/include/spa/pod/builder.h b/spa/include/spa/pod/builder.h
index 644f7b83b..b3d487796 100644
--- a/spa/include/spa/pod/builder.h
+++ b/spa/include/spa/pod/builder.h
@@ -563,7 +563,7 @@ spa_pod_builder_addv(struct spa_pod_builder *builder, va_list args)
 {
 	int res = 0;
 	struct spa_pod_frame *f = builder->state.frame;
-	uint32_t ftype = f ? f->pod.type : SPA_TYPE_None;
+	uint32_t ftype = f ? f->pod.type : (uint32_t)SPA_TYPE_None;
 
 	do {
 		const char *format;
diff --git a/spa/include/spa/pod/parser.h b/spa/include/spa/pod/parser.h
index ddf13d67b..99b9927a4 100644
--- a/spa/include/spa/pod/parser.h
+++ b/spa/include/spa/pod/parser.h
@@ -445,7 +445,7 @@ do {											\
 static inline int spa_pod_parser_getv(struct spa_pod_parser *parser, va_list args)
 {
 	struct spa_pod_frame *f = parser->state.frame;
-        uint32_t ftype = f ? f->pod.type : SPA_TYPE_Struct;
+        uint32_t ftype = f ? f->pod.type : (uint32_t)SPA_TYPE_Struct;
 	const struct spa_pod_prop *prop = NULL;
 	int count = 0;
 
diff --git a/src/gst/gstpipewiresrc.c b/src/gst/gstpipewiresrc.c
index 697c0ee82..95d262373 100644
--- a/src/gst/gstpipewiresrc.c
+++ b/src/gst/gstpipewiresrc.c
@@ -194,10 +194,15 @@ clock_disabled:
   }
 }
 
+static void unref_queue_item(gpointer data, gpointer user_data)
+{
+  gst_mini_object_unref(data);
+}
+
 static void
 clear_queue (GstPipeWireSrc *pwsrc)
 {
-  g_queue_foreach (&pwsrc->queue, (GFunc) gst_mini_object_unref, NULL);
+  g_queue_foreach (&pwsrc->queue, unref_queue_item, pwsrc);
   g_queue_clear (&pwsrc->queue);
 }