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confuse 3.3

    1: # wint_t.m4 serial 5 (gettext-0.18.2)
    2: dnl Copyright (C) 2003, 2007-2013 Free Software Foundation, Inc.
    3: dnl This file is free software; the Free Software Foundation
    4: dnl gives unlimited permission to copy and/or distribute it,
    5: dnl with or without modifications, as long as this notice is preserved.
    6: 
    7: dnl From Bruno Haible.
    8: dnl Test whether <wchar.h> has the 'wint_t' type.
    9: dnl Prerequisite: AC_PROG_CC
   10: 
   11: AC_DEFUN([gt_TYPE_WINT_T],
   12: [
   13:   AC_CACHE_CHECK([for wint_t], [gt_cv_c_wint_t],
   14:     [AC_COMPILE_IFELSE(
   15:        [AC_LANG_PROGRAM(
   16:           [[
   17: /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
   18:    <wchar.h>.
   19:    BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included
   20:    before <wchar.h>.  */
   21: #include <stddef.h>
   22: #include <stdio.h>
   23: #include <time.h>
   24: #include <wchar.h>
   25:             wint_t foo = (wchar_t)'\0';]],
   26:           [[]])],
   27:        [gt_cv_c_wint_t=yes],
   28:        [gt_cv_c_wint_t=no])])
   29:   if test $gt_cv_c_wint_t = yes; then
   30:     AC_DEFINE([HAVE_WINT_T], [1], [Define if you have the 'wint_t' type.])
   31:   fi
   32: ])