FL=succes
TRIES='-ll and -lln'
case X$# in
X0)
	myecho "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
	then :
	else myecho "Sorry, your lex does not seem to work"
	     exit 2
	fi
	cat > trylib <<'EOF'
if cc $1 lex.yy.c > /dev/null 2>&1
then
	rm -f lex.yy.* a.out
	exit 0
else
	exit 1
fi
EOF
	if sh trylib -ll
	then
		LEX=-ll
	elif sh trylib -ln
	then
		LEX=-lln
	else
		FL=fail
	fi
	;;
*)	if sh trylib $1
	then
		LEX=$1
	else
		TRIES="$2 and $1"
		FL=fail
	fi
	;;
esac
case X$FL in
Xfail)	myecho 'What option do I have to give to cc to get the LEX library?'
	myecho "I tried " $TRIES "but these don't seem to work."
	myecho -n 'LEX library option: '
	if read ANSWER
	then :
	else myecho "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
		ed - Makefile << EOF
/^LEXLIB/c
LEXLIB = $LEX
.
w
q
EOF
	    )
	done
	;;
esac
rm -f x.l trylib