# Check for variable-length arrays.
-#serial 1
+# serial 4
# From Paul Eggert
-# Copyright (C) 2001 Free Software Foundation, Inc.
-
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2, or (at your option)
-# any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-# 02110-1301, USA.
+# Copyright (C) 2001, 2009-2011 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
AC_DEFUN([AC_C_VARARRAYS],
[
AC_CACHE_CHECK([for variable-length arrays],
ac_cv_c_vararrays,
- [AC_TRY_COMPILE(
- [],
- [static int x; char a[++x]; a[sizeof a - 1] = 0; return a[0];],
+ [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
+ [],
+ [[static int x; char a[++x]; a[sizeof a - 1] = 0; return a[0];]])],
ac_cv_c_vararrays=yes,
ac_cv_c_vararrays=no)])
if test $ac_cv_c_vararrays = yes; then
- AC_DEFINE(HAVE_C_VARARRAYS, 1,
+ AC_DEFINE([HAVE_C_VARARRAYS], [1],
[Define to 1 if C supports variable-length arrays.])
fi
])