Making a free Windows NT POSIX subsystem?

[Mike Swanson]

I've read from archived messages that the microsoft POSIX subsystem in
Windows NT is not good enough for Cygwin.

I was curious as to weather it's possible to develop a free POSIX
subsystem for Windows NT and use that instead.  I don't know any of
the technical programming details and difficulties with it...

How possible is this? Would this allow case-sensitivity with NTFS, and
certain other features blocked by the Win32 subsystem?

More importantly, how easy would it to maintain an NT POSIX subsystem
port of Cygwin (assuming that a free one would be made with more
functionality than Microsoft's) and the Win32-based Cygwin (very
important for Windows 9x/Me)?

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/