binutils-gdb/gnulib/import/m4/mbstate_t.m4
Tom Tromey dc6c21dabf Update gnulib
This updates gnulib to a relatively recent commit.  Most of this was
done by the gnulib import script; the only change I made was to
update-gnulib.sh.

Tested on x86-64 Fedora 34.  I also did a mingw cross build.
2022-04-18 10:14:04 -06:00

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# mbstate_t.m4 serial 14
dnl Copyright (C) 2000-2002, 2008-2022 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
# From Paul Eggert.
# BeOS 5 has <wchar.h> but does not define mbstate_t,
# so you can't declare an object of that type.
# Check for this incompatibility with Standard C.
# AC_TYPE_MBSTATE_T
# -----------------
AC_DEFUN([AC_TYPE_MBSTATE_T],
[
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) dnl for HP-UX 11.11
AC_CACHE_CHECK([for mbstate_t], [ac_cv_type_mbstate_t],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[AC_INCLUDES_DEFAULT[
#include <wchar.h>]],
[[mbstate_t x; return sizeof x;]])],
[ac_cv_type_mbstate_t=yes],
[ac_cv_type_mbstate_t=no])])
if test $ac_cv_type_mbstate_t = yes; then
AC_DEFINE([HAVE_MBSTATE_T], [1],
[Define to 1 if <wchar.h> declares mbstate_t.])
else
AC_DEFINE([mbstate_t], [int],
[Define to a type if <wchar.h> does not define.])
fi
])