2017-06-27 6:06 GMT-03:00 Dan Wilcox <danomatika@gmail.com>:

2. If you want to build from a clone from Github, you can install autoconf, automaker, & libtool, then the autopen script will work (this really only makes sense for developers).

Well, I'm attempting to be considered a developer :) 
 
Easiest way to do this is to use Homebrew. Once HB is installed:

    brew install autoconf automake libtool

yeah, I had HB, so I did it, tried this, and it all worked fine.

thanks for all your detailed help Dan, you're the best ;)