I've put a project aside for the last year while I did some more Uni, and it compile way back then... I can't believe the changes they've made to XCode in that small amount of time!
To cut the long story short... I built Bullet Physics with gmake, I have framework, I installed the framework, I have also included the src folder of Bullet Physics so the compiler can find it... then my first compile I make ... I have so many errors it's hilarious.

unexpected type, expected expressions, semantic issues... unknown type name 'class' ... too many errors it ends up stopping because it spits out way too many. Everything I've done looks like it should work though!?