I'm working on a project where I need to bring in an outside library.
I found the library, and in order to make it a part of my project, my understanding is that I need to take the project provided (which includes the library I want) and then set the HEADER_SEARCH_PATHS to an appropriate value to be able to find the new library.
However whenever I try, I found that the "Source Trees" tab is missing from my XCode preferences pane. Does anybody have any idea why this might be? It feels very strange. Should I try downloading the program again?