In a message dated 11/4/2002 6:05:11 AM Eastern Standard Time, ian@teliauk.com writes:

I'm 99% sure a out of the box build under cygwin autodetects X, and
gives you both X and native GUI
You can either get the sources and built it yourself or the installer version

I'm 100% sure that I just built 21.4 CVSit under Cygwin and it autodetected both X and the native GUI. The resultant executable will run the Windows GUI unless it detects a setting for the DISPLAY environment variable, in which case it tries to run under X.
I must admit, I haven't done much testing of the X version lately.

kguy@gmx.at wrote:
>I' am currently running a native windows installation of Xemacs on a
>Winxp machine. I have installed the cygwin tools (with x server) and will like to
>migrate from native windows to a cygwin installation that supports
>both X and Win32 Gui. The FAQs on www.xemacs.org could not instruct
>me on the status of the current release of cygwin-xemacs concerning
>the dual support of X and Win32 GUI.
>I would appreciate any comment on this topic. Any report on building
>xemacs with dual support is also welcome. (I have never build xemacs
>before).
>
>Thanks Guy