Index: drc.h
===================================================================
--- drc.h	(revision 21137)
+++ drc.h	(revision 21138)
@@ -29,8 +29,10 @@
 #ifndef PCB_DRC_H
 #define PCB_DRC_H
 
+#include <genlist/gendlist.h>
 #include "unit.h"
 
+typedef struct drc_violation_s pcb_drc_violation_t;
 struct drc_violation_s {
 	char *title;
 	char *explanation;
@@ -42,8 +44,25 @@
 	int object_count;
 	long int *object_id_list;
 	int *object_type_list;
+
+	gdl_elem_t link;              /* always part of a list */
 };
 
-typedef struct drc_violation_s pcb_drc_violation_t;
+void pcb_drc_list_free_fields(pcb_drc_violation_t *drc);
+void pcb_drc_list_free(pcb_drc_violation_t *drc);
 
+/* List of drc violations */
+#define TDL(x)      pcb_drc_list_ ## x
+#define TDL_LIST_T  pcb_drc_list_t
+#define TDL_ITEM_T  pcb_drc_violation_t
+#define TDL_FIELD   link
+#define TDL_SIZE_T  size_t
+#define TDL_FUNC
+
+#define pcb_drc_list_foreach(list, iterator, loop_elem) \
+	gdl_foreach_((&((list)->lst)), (iterator), (loop_elem))
+
+#include <genlist/gentdlist_impl.h>
+#include <genlist/gentdlist_undef.h>
+
 #endif