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libiconv 1.16

    1: # mbstate_t.m4 serial 13
    2: dnl Copyright (C) 2000-2002, 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: # 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: ])