[glandium]

I'd rather have people complaining about having to run configure a bunch of times to disable several features they don't have the libraries for than complaining that a feature doesn't work (because it ended up being disabled without them knowing).

Likewise, I'd rather distros figure out the hard way when a new release has a new feature and needs a new dependency rather than their users complain that a new feature is missing.

Principle of least surprises.