+void compute_output_file_names PARAMS((void));
+
+FILE *xfopen PARAMS ((const char *name, const char *mode));
+int xfclose PARAMS ((FILE *ptr));
+
+/* Compute the double inclusion guard's name. */
+char *compute_header_macro PARAMS ((void));
+
+const char *skeleton_find PARAMS ((const char *envvar,
+ const char *skeleton_name));
+
+/* Is SUFFIX ending STRING? */
+int strsuffix (const char* string, const char* suffix);
+
+/* Return a newly allocated string composed of the concatenation of
+ STRING1, and STRING2. */
+char* stringappend (const char* string1, const char* string2);
+
+/* Should we insert '.tab' in yacc-compatible parsers? */
+extern int tab_extension;
+
+/* Prefix used to generate output files names. */
+extern char* short_base_name;