extern void
print_sys_errmsg PARAMS ((char *, int));
-/* From regex.c */
+/* From regex.c or libc. BSD 4.4 declares this with the argument type as
+ "const char *" in unistd.h, so we can't declare the argument
+ as "char *". */
extern char *
-re_comp PARAMS ((char *));
+re_comp PARAMS ((const char *));
/* From symfile.c */