Not able to build my project on xcode 4.2

Question

I have upgraded my xcode to 4.2 (using snow leopard).Previously i was using Xcode 3.2.6 and my project build successfully with it. Now I\'m unable to build it, instead Xcode emi

Answer 1

The first error means the linker (ld) in Xcode 4.2 encountered an option (-A) that is no longer supported.

If you no longer need to build the same Xcode project in Xcode 3.2.6 then

1. check your Project's Build Settings to ensure you don't have '-A' specified .
2. click on the "Validate Settings" button to identify any other project settings that may cause problem.

Your second error may be caused by Xcode 4.2 defaulting to armv7 build architecture that is unlisted your Xcode project (because it was built using Xcode 3.2.6). If you need to build binaries for armv6, then add that to your build architecture list.