There are at least a dozen threads on the same topic, including guides on how to set it up. I am surprised that the "start a new thread" page did not throw you some suggestions as you were typing the thread title. I would throw you a bunch of links myself if I wasn't typing this on the Jolla which makes thngs like cut'n'paste a bit tricky (N900 is much better).

I for one am doing ALL my development for the N900 on the device. The only exception is using Qt Creator on the PC, but only for big changes. For minor alterations I skip that and use Leafpad on the device as well.