The other day, I tried to compile the Fudgets library with GHC-MinGW. It didn't work, of course, and having GHC for Cygwin would presumably significantly reduce the amount of pain required to port it. (Support for certain Posix system calls and symbolic links would be helpful.)

At first I assumed that it would be fairly easy to create GHC-Cygwin from GHC-MinGW, but then I read the explicit statement in the documentation, that Cygwin is not supported, and was rather discouraged...

We would happily support it, but we don't have the resources. It'll be supported if someone steps up to take on the responsiblity - the advantage would be that you would get your name in lights on http://www.haskell.org/ghc/contributors.html Cheers, Simon