why cannot I see serial devices using ls

JonMcG cygwin@mcgugan.co.uk
Wed Sep 22 13:26:00 GMT 2010

I have decided to  port some code to cygwin from linux. It uses serial ports
and under linux I can 
ls -l /dev/tty*
If I do this under cygwin I get nothing. If I do 
ls -l /dev 
I only get a few device. However if I do 
ls -l /dev/ttyS0 
ls -l /dev/com1 
then I get what I would expect.
I have searched cygwin FAQ etc and this forum but didn't find anything.
Anybody any ideas what I have to do?
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