1 # mbstate_t.m4 serial 13 2 dnl Copyright (C) 2000-2002, 2008-2012 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 # From Paul Eggert. 8 9 # BeOS 5 has <wchar.h> but does not define mbstate_t, 10 # so you can't declare an object of that type. 11 # Check for this incompatibility with Standard C. 12 13 # AC_TYPE_MBSTATE_T 14 # ----------------- 15 AC_DEFUN([AC_TYPE_MBSTATE_T], 16 [ 17 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) dnl for HP-UX 11.11 18 19 AC_CACHE_CHECK([for mbstate_t], [ac_cv_type_mbstate_t], 20 [AC_COMPILE_IFELSE( 21 [AC_LANG_PROGRAM( 22 [AC_INCLUDES_DEFAULT[ 23 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before 24 <wchar.h>. 25 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be 26 included before <wchar.h>. */ 27 #include <stddef.h> 28 #include <stdio.h> 29 #include <time.h> 30 #include <wchar.h>]], 31 [[mbstate_t x; return sizeof x;]])], 32 [ac_cv_type_mbstate_t=yes], 33 [ac_cv_type_mbstate_t=no])]) 34 if test $ac_cv_type_mbstate_t = yes; then 35 AC_DEFINE([HAVE_MBSTATE_T], [1], 36 [Define to 1 if <wchar.h> declares mbstate_t.]) 37 else 38 AC_DEFINE([mbstate_t], [int], 39 [Define to a type if <wchar.h> does not define.]) 40 fi 41 ]) 42
