1# Finding valid warning flags for the C Compiler. -*-Autoconf-*- 2# 3# Copyright (C) 2001, 2002 Free Software Foundation, Inc. 4# 5# This program is free software; you can redistribute it and/or modify 6# it under the terms of the GNU General Public License as published by 7# the Free Software Foundation; either version 2 of the License, or 8# (at your option) any later version. 9# 10# This program is distributed in the hope that it will be useful, 11# but WITHOUT ANY WARRANTY; without even the implied warranty of 12# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13# GNU General Public License for more details. 14# 15# You should have received a copy of the GNU General Public License 16# along with this program; if not, write to the Free Software 17# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 18# 02110-1301 USA 19 20# serial 1 21 22AC_DEFUN([BISON_WARNING], 23[AC_MSG_CHECKING(whether compiler accepts $1) 24AC_SUBST(WARNING_CFLAGS) 25ac_save_CFLAGS="$CFLAGS" 26CFLAGS="$CFLAGS $1" 27AC_TRY_COMPILE(, 28[int x;], 29WARNING_CFLAGS="$WARNING_CFLAGS $1" 30AC_MSG_RESULT(yes), 31AC_MSG_RESULT(no)) 32CFLAGS="$ac_save_CFLAGS"]) 33