I'm having an issue installing the latest Facebook SDK to my iOS app. I'm using xcode to generate the app but as soon as I add the SDK via cocoapods I get an error when trying to build the app in xcode. has anyone experience the same issue. if so please let me know on what you did to get it sorted. the error I get on xcode is: "linker command failed with exit code 1(use -v to see invocation)"