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+?RCS: $Id: d_byacc.U,v 1997/02/28 15:31:14 ram Exp $
+?RCS: Copyright (c) 1996, Andy Dougherty
+?RCS: Copyright (c) 1991-1993, Raphael Manfredi
+?RCS: You may redistribute only under the terms of the Artistic Licence,
+?RCS: as specified in the README file that comes with the distribution.
+?RCS: You may reuse parts of this distribution only within the terms of
+?RCS: that same Artistic Licence; a copy of which may be found at the root
+?RCS: of the source tree for dist 3.0.
+?RCS: $Log: d_byacc.U,v $
+?RCS: Revision 1997/02/28 15:31:14 ram
+?RCS: patch61: created
+?MAKE:d_byacc: byacc Setvar
+?MAKE: -pick add $@ %<
+?S: This variable indicates whether byacc is available.
+?S: If the user has specified 'portability', then Makefile.SH
+?S: sees $byacc='byacc' whether or not the user actually has
+?S: byacc. This variable allows us to determine in a makefile
+?S: if we really have byacc.
+?LINT:set d_byacc
+: Check if we really have byacc
+case "$byacc" in
+''|'byacc') val="$undef" ;;
+*) val="$define" ;;
+set d_byacc
+eval $setvar