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42 lines
1.4 KiB
Plaintext
42 lines
1.4 KiB
Plaintext
# mbstate_t.m4 serial 13
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dnl Copyright (C) 2000-2002, 2008-2020 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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# From Paul Eggert.
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# BeOS 5 has <wchar.h> but does not define mbstate_t,
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# so you can't declare an object of that type.
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# Check for this incompatibility with Standard C.
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# AC_TYPE_MBSTATE_T
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# -----------------
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AC_DEFUN([AC_TYPE_MBSTATE_T],
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[
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AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) dnl for HP-UX 11.11
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AC_CACHE_CHECK([for mbstate_t], [ac_cv_type_mbstate_t],
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[AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[AC_INCLUDES_DEFAULT[
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/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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<wchar.h>.
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BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
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included before <wchar.h>. */
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#include <stddef.h>
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#include <stdio.h>
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#include <time.h>
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#include <wchar.h>]],
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[[mbstate_t x; return sizeof x;]])],
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[ac_cv_type_mbstate_t=yes],
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[ac_cv_type_mbstate_t=no])])
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if test $ac_cv_type_mbstate_t = yes; then
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AC_DEFINE([HAVE_MBSTATE_T], [1],
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[Define to 1 if <wchar.h> declares mbstate_t.])
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else
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AC_DEFINE([mbstate_t], [int],
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[Define to a type if <wchar.h> does not define.])
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fi
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])
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