Add warning about unused parameters to CMake config and fix code accordingly

CMakeLists.txt

@@ -32,7 +32,7 @@ set(SOURCE
   ${LAYER_SELECTOR_SOURCES}
 )
 
-add_compile_options(-Wall -Wold-style-declaration -Wuninitialized -Wmaybe-uninitialized)
+add_compile_options(-Wall -Wold-style-declaration -Wuninitialized -Wmaybe-uninitialized -Wunused-parameter)
 
 add_executable(${PROJECT_NAME} ${SOURCE} ${CMAKE_CURRENT_BINARY_DIR}/resources/resources.c)
 add_dependencies(${PROJECT_NAME} glib-resources)

cell-selector/lib-cell-renderer.c

@@ -42,6 +42,7 @@ enum {
 
 void lib_cell_renderer_init(LibCellRenderer *self)
 {
+	(void)self;
 	/* Nothing to do */
 }
 
@@ -111,6 +112,8 @@ static void lib_cell_renderer_get_property(GObject      *object,
 					   GValue	*value,
 					   GParamSpec   *pspec)
 {
+	(void)value;
+
 	switch (param_id) {
 	default:
 		G_OBJECT_WARN_INVALID_PROPERTY_ID(object, param_id, pspec);

gds-render-gui.c

@@ -86,6 +86,7 @@ G_DEFINE_TYPE(GdsRenderGui, gds_render_gui, G_TYPE_OBJECT)
 static gboolean on_window_close(gpointer window, GdkEvent *event, gpointer user)
 {
 	GdsRenderGui *self;
+	(void)event;
 
 	self = RENDERER_GUI(user);
 	/* Don't close window in case of error */

geometric/bounding-box.c

@@ -91,6 +91,17 @@ void bounding_box_prepare_empty(union bounding_box *box)
 	box->vectors.upper_right.y = -DBL_MAX;
 }
 
+/**
+ * @brief Calculate path miter points for a pathwith a \p width and the anchors \p a \p b \p c.
+ * @param[in] a
+ * @param[in] b
+ * @param[in] c
+ * @param[out] m1
+ * @param[out] m2
+ * @param[in] width
+ * @return Miter points in \p m1 and \p m2
+ * @note This function is currently unused (and untested). Ignore any compiler warning regarding this function.
+ */
 static void calculate_path_miter_points(struct vector_2d *a, struct vector_2d *b, struct vector_2d *c,
 					struct vector_2d *m1, struct vector_2d *m2, double width)
 {

layer/layer-selector.c

@@ -158,6 +158,14 @@ static void layer_selector_drag_data_received(GtkWidget *widget, GdkDragContext
 	GtkWidget *source;
 	int pos;
 
+	/* Handle unused parameters */
+	(void)context;
+	(void)x;
+	(void)y;
+	(void)info;
+	(void)time;
+	(void)data;
+
 	row_before = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "row-before"));
 	row_after = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "row-after"));
 
@@ -196,6 +204,10 @@ static gboolean layer_selector_drag_motion(GtkWidget *widget, GdkDragContext *co
 	GtkWidget *drag_row;
 	GtkWidget *row_before;
 	GtkWidget *row_after;
+	(void)context;
+	(void)x;
+	(void)y;
+	(void)time;
 
 	row = GTK_WIDGET(gtk_list_box_get_row_at_y(GTK_LIST_BOX(widget), y));
 
@@ -249,6 +261,8 @@ static void layer_selector_drag_leave(GtkWidget *widget, GdkDragContext *context
 	GtkWidget *drag_row;
 	GtkWidget *row_before;
 	GtkWidget *row_after;
+	(void)context;
+	(void)time;
 
 	drag_row = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "drag-row"));
 	row_before = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "row-before"));
@@ -664,6 +678,7 @@ static void layer_selector_load_mapping_clicked(GtkWidget *button, gpointer user
 	GtkWidget *dialog;
 	gint res;
 	gchar *file_name;
+	(void)button;
 
 	sel = LAYER_SELECTOR(user_data);
 
@@ -723,6 +738,7 @@ static void layer_selector_save_mapping_clicked(GtkWidget *button, gpointer user
 	gint res;
 	gchar *file_name;
 	LayerSelector *sel;
+	(void)button;
 
 	sel = LAYER_SELECTOR(user_data);
 

output-renderers/gds-output-renderer.c

@@ -321,6 +321,8 @@ static void gds_output_renderer_async_wrapper(GTask *task,
 	GdsOutputRenderer *renderer;
 	GdsOutputRendererPrivate *priv;
 	int ret;
+	(void)task_data;
+	(void)cancellable;
 
 	renderer = GDS_RENDER_OUTPUT_RENDERER(source_object);
 	priv = gds_output_renderer_get_instance_private(renderer);