+/* --verbose. */
+extern char *spec_verbose_file;
+
+/* File name specified for the output VCG graph. */
+extern char *spec_graph_file;
+
+/* File name specified with --defines. */
+extern char *spec_defines_file;
+
+/* Read grammar specifications. */
+extern FILE *finput;
+
+
+/* If semantic parser, output a .h file that defines YYSTYPE... */
+extern struct obstack pre_prologue_obstack;
+extern struct obstack post_prologue_obstack;
+
+/* The file name as given on the command line.
+ Not named "input_file" because Flex uses this name for an argument,
+ and therefore GCC warns about a name clash. */
+extern uniqstr grammar_file;
+
+/* The current file name. Might change with %include, or with #line. */
+extern uniqstr current_file;
+
+void compute_output_file_names (void);
+
+FILE *xfopen (const char *name, const char *mode);
+void xfclose (FILE *ptr);
+
+/* Prefix used to generate output file names. */
+extern char *short_base_name;