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libiconv 1.16

    1: # wchar_t.m4 serial 4 (gettext-0.18.2)
    2: dnl Copyright (C) 2002-2003, 2008-2019 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 <stddef.h> has the 'wchar_t' type.
    9: dnl Prerequisite: AC_PROG_CC
   10: 
   11: AC_DEFUN([gt_TYPE_WCHAR_T],
   12: [
   13:   AC_CACHE_CHECK([for wchar_t], [gt_cv_c_wchar_t],
   14:     [AC_COMPILE_IFELSE(
   15:        [AC_LANG_PROGRAM(
   16:           [[#include <stddef.h>
   17:             wchar_t foo = (wchar_t)'\0';]],
   18:           [[]])],
   19:        [gt_cv_c_wchar_t=yes],
   20:        [gt_cv_c_wchar_t=no])])
   21:   if test $gt_cv_c_wchar_t = yes; then
   22:     AC_DEFINE([HAVE_WCHAR_T], [1], [Define if you have the 'wchar_t' type.])
   23:   fi
   24: ])