extern void constant_expression_warning PROTO((tree));
extern void decl_attributes PROTO((tree, tree));
extern void declare_function_name PROTO((void));
+extern tree convert_and_check PROTO((tree, tree));
+extern void constant_expression_warning PROTO((tree));
+extern void overflow_warning PROTO((tree));
+extern void unsigned_conversion_warning PROTO((tree, tree));
/* Read the rest of the current #-directive line. */
#if 0
extern char *get_directive_line PROTO((FILE *));