Using Xcode workspace

Using Open Source Static Libraries in Xcode 4

http://blog.carbonfive.com/2011/04/04/using-open-source-static-libraries-in-xcode-4/

Easy Xcode Static Library Subprojects and Submodules

http://www.blog.montgomerie.net/easy-xcode-static-library-subprojects-and-submodules

Helping Xcode Find Library Headers

http://www.cocoanetics.com/2012/01/helping-xcode-find-library-headers/