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+?RCS: $Id: yacc.U,v 3.0.1.1 1994/05/13 15:28:48 ram Exp $
+?RCS:
+?RCS: Copyright (c) 1991-1993, Raphael Manfredi
+?RCS:
+?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:
+?RCS: $Log: yacc.U,v $
+?RCS: Revision 3.0.1.1 1994/05/13 15:28:48 ram
+?RCS: patch27: added byacc as another alternative (ADO)
+?RCS:
+?RCS: Revision 3.0 1993/08/18 12:10:03 ram
+?RCS: Baseline for dist 3.0 netwide release.
+?RCS:
+?MAKE:yacc yaccflags: Guess Myread Oldconfig byacc bison cat test
+?MAKE: -pick add $@ %<
+?S:yacc:
+?S: This variable holds the name of the compiler compiler we
+?S: want to use in the Makefile. It can be yacc, byacc, or bison -y.
+?S:.
+?S:yaccflags:
+?S: This variable contains any additional yacc flags desired by the
+?S: user. It is up to the Makefile to use this.
+?S:.
+?T:comp
+: determine compiler compiler
+case "$yacc" in
+'')
+ dflt=yacc;;
+*)
+ dflt="$yacc";;
+esac
+echo " "
+comp='yacc'
+if $test -f "$byacc"; then
+ dflt="$byacc"
+ comp="byacc or $comp"
+fi
+if $test -f "$bison"; then
+ comp="$comp or bison -y"
+fi
+rp="Which compiler compiler ($comp) shall I use?"
+. ./myread
+yacc="$ans"
+case "$yacc" in
+*bis*)
+ case "$yacc" in
+ *-y*) ;;
+ *)
+ yacc="$yacc -y"
+ echo "(Adding -y option to bison to get yacc-compatible behaviour.)"
+ ;;
+ esac
+ ;;
+esac
+
+@if yaccflags
+: see if we need extra yacc flags
+dflt="$yaccflags"
+case "$dflt" in
+'') dflt=none;;
+esac
+$cat <<EOH
+
+Your yacc program may need extra flags to normally process the parser sources.
+Do NOT specify any -d or -v flags here, since those are explicitely known
+by the various Makefiles. However, if your machine has strange/undocumented
+options (like -Sr# on SCO to specify the maximum number of grammar rules), then
+please add them here. To use no flags, specify the word "none".
+
+EOH
+rp="Any additional yacc flags?"
+. ./myread
+case "$ans" in
+none) yaccflags='';;
+*) yaccflags="$ans";;
+esac
+
+@end