-#serial 4
+# serial 6
-# Copyright (C) 2002 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2005, 2009-2011 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_BISON],
[
- # getdate.y works with bison only.
+ # parse-datetime.y works with bison only.
: ${YACC='bison -y'}
- AC_SUBST(YACC)
+dnl
+dnl Declaring YACC & YFLAGS precious will not be necessary after GNULIB
+dnl requires an Autoconf greater than 2.59c, but it will probably still be
+dnl useful to override the description of YACC in the --help output, re
+dnl parse-datetime.y assuming `bison -y'.
+ AC_ARG_VAR([YACC],
+[The `Yet Another C Compiler' implementation to use. Defaults to `bison -y'.
+Values other than `bison -y' will most likely break on most systems.])dnl
+ AC_ARG_VAR([YFLAGS],
+[YFLAGS contains the list arguments that will be passed by default to Bison.
+This script will default YFLAGS to the empty string to avoid a default value of
+`-d' given by some make applications.])dnl
])