Originally Posted by Kai771
That's what I thought too, except luajit needs lua for it's make to succeed (if I remember correctly... I'm pretty sure it failed until I installed lua, but I'll check it again). In Ubuntu 12.04, just apt-get install lua doesn't get you anything - you need to specify version. So I went with latest. But will check that again, and get back to you (Checked - you need to specify version. It offers lua50, lua5.1 and lua5.2).
luajit implies: lua5.1, no luajit for 5.2 (as of a few weeks ago anyway).
Plus, PDFreader is a lua 5.1 application, not likely to move to lua 5.2 any time soon.