Can anyone help me use Bullet in my C++ Xcode Project?

[Pandiux]

Hey, Im using a mac and I downloaded Bullet and followed the instructions to produce the makefile. This installed the include path in /usr/local/include and a couple of .a libraries in /usr/local/lib. I opened my xcode project and added the include bullet path in Header search path in Xcode and in Libraries search path I added /usr/local/lib/. I can add the headers, but as soon as I try to add the most basic header #include <btBulletDynamicsCommon.h>, I keep getting 3 errors which are "undefined symbol" any ideas of why is this?
PS: besides adding the library search path I also dragged the .a files into my xcode project.
Thanks for your help