+#ifndef _WCTYPE_H
+
+#ifndef _ISOMAC
+/* We try to get wint_t from <stddef.h>, but not all GCC versions define it
+ there. So define it ourselves if it remains undefined. */
+# define __need_wint_t
+# include <stddef.h>
+# ifndef _WINT_T
+/* Integral type unchanged by default argument promotions that can
+ hold any value corresponding to members of the extended character
+ set, as well as at least one value that does not correspond to any
+ member of the extended character set. */
+# define _WINT_T
+typedef unsigned int wint_t;
+# endif
+
+/* Need to repeat these prototypes here, as wctype/wctype.h defines all
+ these as macros and thus we couldn't add libc_hidden_proto. */
+
+extern int iswalpha (wint_t __wc);
+extern int iswalnum (wint_t __wc);
+extern int iswdigit (wint_t __wc);
+extern int iswlower (wint_t __wc);
+extern int iswspace (wint_t __wc);
+extern int iswxdigit (wint_t __wc);
+extern wint_t towlower (wint_t __wc);
+extern wint_t towupper (wint_t __wc);
+
+libc_hidden_proto (iswalpha)
+libc_hidden_proto (iswalnum)
+libc_hidden_proto (iswdigit)
+libc_hidden_proto (iswlower)
+libc_hidden_proto (iswspace)
+libc_hidden_proto (iswxdigit)
+libc_hidden_proto (towlower)
+libc_hidden_proto (towupper)
+#endif
+
#include <wctype/wctype.h>
+
+#ifndef _ISOMAC
+/* Internal interfaces. */
+extern int __iswspace (wint_t __wc);
+extern int __iswctype (wint_t __wc, wctype_t __desc);
+extern wctype_t __wctype (const char *__property);
+extern wctrans_t __wctrans (const char *__property);
+extern wint_t __towctrans (wint_t __wc, wctrans_t __desc);
+
+extern __typeof (iswalnum_l) __iswalnum_l;
+extern __typeof (iswalpha_l) __iswalpha_l;
+extern __typeof (iswblank_l) __iswblank_l;
+extern __typeof (iswcntrl_l) __iswcntrl_l;
+extern __typeof (iswdigit_l) __iswdigit_l;
+extern __typeof (iswlower_l) __iswlower_l;
+extern __typeof (iswgraph_l) __iswgraph_l;
+extern __typeof (iswprint_l) __iswprint_l;
+extern __typeof (iswpunct_l) __iswpunct_l;
+extern __typeof (iswspace_l) __iswspace_l;
+extern __typeof (iswupper_l) __iswupper_l;
+extern __typeof (iswxdigit_l) __iswxdigit_l;
+extern __typeof (towlower_l) __towlower_l;
+extern __typeof (towupper_l) __towupper_l;
+
+libc_hidden_proto (__towctrans)
+libc_hidden_proto (__iswctype)
+libc_hidden_proto (__iswalnum_l)
+libc_hidden_proto (__iswalpha_l)
+libc_hidden_proto (__iswblank_l)
+libc_hidden_proto (__iswcntrl_l)
+libc_hidden_proto (__iswdigit_l)
+libc_hidden_proto (__iswlower_l)
+libc_hidden_proto (__iswgraph_l)
+libc_hidden_proto (__iswprint_l)
+libc_hidden_proto (__iswpunct_l)
+libc_hidden_proto (__iswspace_l)
+libc_hidden_proto (__iswupper_l)
+libc_hidden_proto (__iswxdigit_l)
+libc_hidden_proto (__towlower_l)
+libc_hidden_proto (__towupper_l)
+
+/* The spec says that isdigit must only match the decimal digits. We
+ can check this without a memory access. */
+# if IS_IN (libc)
+# undef iswdigit
+# define iswdigit(c) ({ wint_t __c = (c); __c >= L'0' && __c <= L'9'; })
+# undef iswdigit_l
+# define iswdigit_l(c, l) ({ wint_t __c = (c); __c >= L'0' && __c <= L'9'; })
+# undef __iswdigit_l
+# define __iswdigit_l(c, l) ({ wint_t __c = (c); __c >= L'0' && __c <= L'9'; })
+# endif
+
+#endif
+#endif