From: Roger Pack <rogerdpack@...>
Date: 2009-07-20T23:56:14+09:00
Subject: [ruby-core:24458] Re: Meaning of RUBY_PLATFORM

> On Cygwin, Gem.win_platform? returns true, but Cygwin emulates a POSIX
> layer on top of Windows.
>
> Please use with precaution and double-check prior assuming you're 100%
> on Windows ;-)

Tricky thing :)
=r