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 22 AC_DEFUN([BISON_WARNING], 23 [AC_MSG_CHECKING(whether compiler accepts $1) 24 AC_SUBST(WARNING_CFLAGS) 25 ac_save_CFLAGS="$CFLAGS" 26 CFLAGS="$CFLAGS $1" 27 AC_TRY_COMPILE(, 28 [int x;], 29 WARNING_CFLAGS="$WARNING_CFLAGS $1" 30 AC_MSG_RESULT(yes), 31 AC_MSG_RESULT(no)) 32 CFLAGS="$ac_save_CFLAGS"]) 33
