Appreciate the script and the response. X)
I had run through the instructions, also using Ubuntu on a VM. However, the compile seems to timeout at 48% on the 2.1.5 build I'm attempting. With both GCC v5 and Clang, same result. No indications of errors, just no progress in the terminal. I had let it run for 2 hours just in case, but when I returned it was still where it was.
I got mingw installed, but I haven't gotten to attempt a Windows cross compile. Though I'll probably keep doing this on Windows, unless it becomes more convenient to do them all together in the same environment.
For a last attempt I will try out some other distro tonight, because I would like to at least get a Linux template made in some setup before carrying on with it.