title: BlocksKit and Xcode 4.5
body: <p>I've just updated to Xcode 4.5 an am getting this error </p>
  
  <p>ld: file is universal (3 slices) but does not contain a(n) armv7s slice:</p>
  
  <p>I've tried compiling BlocksKit but get this error /Users/toddbates/Desktop/ios demos/BlocksKit/A2DynamicDelegate/libffi/ios/src/x86/darwin.S:34:10: 'fficonfig.h' file not found</p>
  
  <p>Any ideas?</p>