ref: d7f37646965ee26214da0e1d97f3c1d54349ae2d
dir: /testdir/Compare.p/
oldawk=${oldawk-awk}
awk=${awk-../a.out}
echo oldawk=$oldawk, awk=$awk
for i
do
echo "$i:"
$oldawk -f $i test.countries test.countries >foo1
$awk -f $i test.countries test.countries >foo2
if cmp -s foo1 foo2
then true
else echo -n "$i: BAD ..."
fi
diff -b foo1 foo2 | sed -e 's/^/ /' -e 10q
done