for extension in c y
do
    for file in *.$extension
    do ofile=`basename $file .$extension`.o
    grep '^# *include.*"' $file|sed "s/.*\"\(.*\)\".*/$ofile:	\1/"
    done
done | sort -u >depend
ed - Makefile <<'!'
/AUTOAUTOAUTO/+,$d
$r depend
w
q
!
rm -f depend