[Yaffs] building yaffs direct...

Hi,
What is the status of building "yaffs direct"? Based on a different thread
(http://www.aleph1.co.uk/lurker/message/20120614.203459.f1b2edbf.en.html),
am
I correct to assume that this is under construction??

I suppose I have two levels of non-standard complexity in my attempt to
do this...
First, I wanna build yaffs direct to run os-less.
Second I'd like to be able to build on Cygwin.

I didn't find much text on this, so before I start building my own makefile
I figured I'd ask if there is a documented procedure for doing this.

Thanks,
Ed