-int __xargmatch_internal (char const *context,
- char const *arg, char const *const *arglist,
- char const *vallist, size_t valsize,
- argmatch_exit_fn exit_fn);
+ptrdiff_t __xargmatch_internal (char const *context,
+ char const *arg, char const *const *arglist,
+ char const *vallist, size_t valsize,
+ argmatch_exit_fn exit_fn);