FL=succes
TRIES=
case X$# in
X0)
	if (.Xlex) > /dev/null 2>&1
	then
		TRY=`.Xlex`
	else	TRY=-lln
	fi
	echo "trying to find your lex library ..."
	cat > x.l <<'EOF'
%%
[A-Z]	putchar(yytext[0]+'a'-'A');
EOF
	if lex x.l > /dev/null 2>&1 && cc -c lex.yy.c > /dev/null 2>&1
	then :
	else echo "Sorry, your lex does not seem to work"
	     exit 2
	fi
	cat > trylib <<'EOF'
if cc lex.yy.o $1 > /dev/null 2>&1
then
	rm -f lex.yy.* a.out
	exit 0
else
	exit 1
fi
EOF
	if sh trylib $TRY
	then
		LEX=$TRY
	else
		exec $0 -ll $TRY
	fi
	;;
*)	if sh trylib $1
	then
		LEX=$1
	else
		TRIES="$2 and $1"
		FL=fail
	fi
	;;
esac
case X$FL in
Xfail)	echo 'What option do I have to give to cc to get the LEX library?'
	echo "I tried " $TRIES "but these don't seem to work."
	echo -n 'LEX library option: '
	if read ANSWER
	then :
	else echo "Sorry, got EOF while reading your answer"
	     exit 9
	fi
	exec $0 $ANSWER "$TRIES"
	;;
Xsucces)
	for i in ../util/opt ../util/cgg ../util/ncgg ../lang/occam/comp
	do
	    (	cd $i
		cp Makefile makefile
		ed - makefile << EOF
/^LEXLIB/c
LEXLIB = $LEX
.
w
q
EOF
	    )
	done
	;;
esac
rm -f x.l trylib lex.yy.*
echo echo "$LEX" > .Xlex
chmod +x .Xlex
echo "apparently, \"cc ... $LEX\" works"
