I googled and found this github page. I assume that is what you are using.

I'm not sure what the sdk is supposed to do, but I went ahead and just tried to get that file to run. I have a Debian partition and not Cygwin so any differences may of course be caused by the OS. I had a couple errors from libraries that weren't installed but after I installed them it got started for me. It errored out after ~30s of compiling due something or other. But it spit out a bunch of text.

I would suggest adding an echo to various lines so you can see how far it gets before exiting. That may give you an idea of what is causing the problem. Alternatively you can try setting up a virtual machine or using WSL and see if either gives better results. I haven't messed with Cygwin but I kinda doubt that it is the problem by itself but a fresh start may work if there is some system config that is causing the problem. If you give me a more detailed account of what you did I may be able to be more helpful. I don't know if @Vogtinator is still around...

Off topic, but why did you choose Cygwin over WSL?

Hello, @E37. Yeah as lolpro11 said the wiki asks you to use Cygwin so that's why I chose it. I'm new to the Ndless scene and haven't dabbled much in C or C++ before that so I'm not actually sure what WSL is. I'll look into it though and see if it helps with anything, thanks. Also, the wiki said that on windows you had to fix a few symlinks in the files before building. I only fixed the one it mentioned with zehn.h, but yeah that's probably why it's not running. I have a Manjaro partition so I'll see if that gives me better luck.