| # Finding valid warning flags for the C Compiler. -*-Autoconf-*- |
| # |
| # Copyright (C) 2001, 2002 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 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, write to the Free Software |
| # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| # 02110-1301 USA |
| |
| # serial 1 |
| |
| AC_DEFUN([BISON_WARNING], |
| [AC_MSG_CHECKING(whether compiler accepts $1) |
| AC_SUBST(WARNING_CFLAGS) |
| ac_save_CFLAGS="$CFLAGS" |
| CFLAGS="$CFLAGS $1" |
| AC_TRY_COMPILE(, |
| [int x;], |
| WARNING_CFLAGS="$WARNING_CFLAGS $1" |
| AC_MSG_RESULT(yes), |
| AC_MSG_RESULT(no)) |
| CFLAGS="$ac_save_CFLAGS"]) |
