I certainly understand that your company has no specific interest in making this port run (resp. build) on every platform (resp. in every development environment).
Believe me, we really WANT it to run on every Windows and build in every environment. I just wanted to say that, given the thousands of things boiling in the pot, people should not expect too much from us on this front :-/. This was clearly NOT aimed at you. From what you say the instructions are inexplicably poor. Probably at the time we last built the port stand-alone, the software built OK and who was responsible of creating the instructions thought a quick how-to was enough. Then things bit-rotted. We’ll fix our fault ;-).