title: how to link boost with Xcode
body: <p>I've upgraded my OS to El Capitan. I've used Macports to install Boost. All tutorials I've seen use this folder <code>/usr/local/include</code> to include the header files. In my case, I can't see this folder listed in my system unless this folder is hidden.  I have no idea where the libraries installed via macports. Any suggestions?</p>