IPhone + Twitter + LinkedIn + Facebook Error : Command /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 failed with exit code 1

Question

I am using MGTwitterEngine oAuth and LinkedIn iOS SDK in my iOS application with facebook-ios-sdk

TwitterEngine : https://github.com/bengottlieb/Twitter-OAuth-iPhone

Answer 1

'duplicate symbol' means one of your classes is #import'ing something twice that it shouldn't. If you look carefully, libLinkedInClientLibrary and libOAuth both symbolicate the same method '_EstimateBas64EncodedDataSize'. Check your #imports.