ld: duplicate symbol _objc_retainedObject on iOS 4.3 , but not on iOS 5.0

Question

Some background - I\'ve built a custom Framework using Diney\'s guide at http://db-in.com/blog/2011/07/universal-framework-iphone-ios-2-0/

Its built for both armv

Answer 1

I'm struggling with the same problem. The workaround is so set the deployment target of your framework to iOS5 (check if that doesn't make other problems though).

Then you must use ARC in the master project if targeting iOS4, else libarclite will be missing. My solution will be to supply two frameworks, depending if they use ARC or not.

Here's two links to Apple's dev forum with a little bit more info: https://devforums.apple.com/message/539344#539344

https://devforums.apple.com/message/588316#588316

Update: There is a better way. Just build your static library with iOS5 minimum target, and manually add /Developer/Platforms/iPhoneOS.platform/Developer/usr/lib/arc/libarclite_iphoneos.a (and /Developer/usr/lib/arc/libarclite_iphonesimulator.a) if your project is not using ARC and needs iOS4-support.

Update 2: Actually, just use the linker flag -fobjc-arc ; this will link libarclite with the library if it's not already in there. Best solution.