#define required_argument 1
#define optional_argument 2
-extern int
+int
wgetopt (int argc, wchar_t *const *argv, const wchar_t *optstring);
-extern int
+int
wgetopt_long(int argc, wchar_t * const *argv, const wchar_t *options,
const struct woption *long_options, int *opt_index);
-extern int
+int
wgetopt_long_only(int argc, wchar_t *const *argv, const wchar_t *options,
const struct woption *long_options, int *opt_index);