chapel-lang/chapel — pull request #775 by Kyle-B (2014-11-07 23:23:53+00:00)
Title: Fix qio_file_path_for_fd so it works in cygwin

qio_file_path_for_fd has three paths that are selected via ifdefs, cygwin was
hitting the fall-back case that always returned "unknown" as the file path.

cygwin can actually use the same code as linux for this operation, so I've
added a check for __CYGWIN__ to that `#if`.