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# Check for variable-length arrays.
#serial 2
# From Paul Eggert
# Copyright (C) 2001, 2009-2013 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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
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_cv_c_vararrays=yes,
ac_cv_c_vararrays=no)])
if test $ac_cv_c_vararrays = yes; then
AC_DEFINE([HAVE_C_VARARRAYS], [1],
[Define to 1 if C supports variable-length arrays.])
fi
])
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