+/* If semantic parser, output a .h file that defines YYSTYPE... */
+extern struct obstack attrs_obstack;
+
+/* ... and output yyguard, containing all the guard code. */
+extern struct obstack guard_obstack;
+
+/* The verbose output. */
+extern struct obstack output_obstack;
+
+/* The VCG graph output. */
+extern struct obstack graph_obstack;