ref: 1c424b1b4d5931f2a4b87b6f0f75827bc53ff9d7
dir: /testdir/Compare.t/
oldawk=${oldawk-myawk}
awk=${awk-../a.out}
echo oldawk=$oldawk, awk=$awk
for i
do
echo "$i:"
$oldawk -f $i test.data >foo1
$awk -f $i test.data >foo2
if cmp -s foo1 foo2
then true
else echo -n "$i: BAD ..."
fi
diff -b foo1 foo2 | sed -e 's/^/ /' -e 10q
done