AC_CHECK_HEADERS([libintl.h])
AC_CHECK_FUNCS_ONCE([isblank iswctype wcscoll])
AC_CHECK_DECLS([isblank], [], [], [[#include <ctype.h>]])
AC_CHECK_HEADERS([libintl.h])
AC_CHECK_FUNCS_ONCE([isblank iswctype wcscoll])
AC_CHECK_DECLS([isblank], [], [], [[#include <ctype.h>]])