It's Open Source, but we're not going to tell you how to build it (opens in new tab)

This title is very misleading. The situation is nuanced. The thread seems to demonstrate that the requester is getting build information from the maintainer but is not to their personal satisfaction as someone with less experience that requires something turn-key.

That's an extremely comprehensive reply, containing all the information anyone would need to know in order to do both release builds and development builds on any of the supported platforms. If you're still having trouble building it, reread the line that says "use cmake".