internal_proto(xtoa);
extern void os_error (const char *) __attribute__ ((noreturn));
-internal_proto(os_error);
+iexport_proto(os_error);
extern void show_locus (st_parameter_common *);
internal_proto(show_locus);
extern void *internal_malloc_size (size_t);
internal_proto(internal_malloc_size);
-extern void internal_free (void *);
-iexport_proto(internal_free);
-
/* environ.c */
extern int check_buffered (int);