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ld: -pie can only be used when targeting iOS 4.2 or later clang: error: linker command failed with exit code 1 (use -v to see invocation) 解决方法： 把target设置高一点project->target->general->Deployment info-->Deployment Target 解决办法转自：http://blog.csdn.net/jasontech/article/details/44653931