m4/warning.m4

   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"])