From OpenTom

Does anybody success on compiling Opentom in cygwin?

8 June 2007: I have had some success on cygwin. Crosscompiling a small hello world application and the Hello Ghoti demo worked. However I never tried to compile a kernel, I'd rather go for Roadnav. Roadnav requires wxWidgets, which require NanoX, which requires the Tomtom Framebuffer. With Roadnav you can make use of OpenStreetMap which allows you to edit the map yourself.

I think there are some problems when compiling "diet".

Please, does anybody give an idea how to solve it?