The strict aliasing rules are broken without this patch becase there
is defined a pointer to the "struct tag" and the structure is defined
later.
================================================================================
--- tags.c
+++ tags.c
@@ -63,8 +63,6 @@
 	struct tag *tl_first;
 	struct tag *tl_last;
 };
-#define TAG_END  ((struct tag *) &taglist)
-static struct taglist taglist = { TAG_END, TAG_END };
 struct tag {
 	struct tag *next, *prev; /* List links */
 	char *tag_file;		/* Source file containing the tag */
@@ -72,6 +70,8 @@
 	char *tag_pattern;	/* Pattern used to find the tag */
 	char tag_endline;	/* True if the pattern includes '$' */
 };
+#define TAG_END  ((struct tag *) &taglist)
+static struct taglist taglist = { TAG_END, TAG_END };
 static struct tag *curtag;
 
 #define TAG_INS(tp) \