Thanks to hhm, who pointed me at [KBOX](http://kevinboone.net/kbox.html),
I have verified that I can build haskell programs that work on Android.

After hacking on it all day, I've succeeded in making an initial build of
git-annex for Android. It links! It runs!

Which is not to say it's usable yet; for one thing I need to get a port
of git before it can do anything useful. (Some of the other things git-annex
needs, like ssh and sha256sum, are helpfully provided by KBOX.)

Next step will be to find or built a git port for Android. I know there's
one in the "Terminal IDE" app. Once I can use git-annex at the command line
on Android, I'll be able to test it out some (I can also port the test
suite program and run it on Android), and get a feeling for what is needed
to get the port to a usable command-line state.

And then on to the webapp, and an Android app, I suppose. So far, the port
doesn't include the webapp, but does include the assistant. The webapp
needs ghci/template haskell for arm. A few people have been reporting they
have that working, but I don't yet.