1) I just tried that line out on my Fedora machine - it doesn't work, doesn't know what repo is.
2) after running 'make' does my computer turn into an Android device?
3) If not, what is the hardware I have to use
4) where are the instructions for loading the newly compiled code onto my device - I see a make, but no make install... I mean I like binaries as much as the next geek, but they aren't terribly interesting unless they, you know, run.
5) I tried loading the binary on my device, but it refused - something about unauthenticated code - what should I do to use your wonderful open system?
OK, obviously I'm trolling a little here, but Andy's tweet is every bit as much a troll. I doubt very much that RMS agrees with Andy as to the openness of Android... In fact, I just went and looked, here's his thoughts on the subject:
Android's source code is free software, but in many phones the binaries of Android are not free, because the phones are set up to refuse to run modified versions if the user installs them. [This practice is called ‘tivoization’, named after the product that pioneered it.] If the software in Android were under version 3 of the GNU General Public License (GNU GPL), users would be guaranteed the freedom to install their own modified versions.
Even when Android is not tivoized, it needs non-free drivers or firmware to run. As far as I know, no smartphone is made that can be run without proprietary software. None respects its users' freedom.
The shortest path to making it possible to run a smartphone without non-free software is to reverse engineer those non-free drivers or firmware and write free replacements - RMS
So that would be a 'no'