Unsupported compiler 'com.apple.compilers.llvmgcc42' selected for architecture 'armv7' Xcode5

刚刚将Xcode更新到Xcode5，一运行报如下错误：

Unsupported compiler 'com.apple.compilers.llvmgcc42' selected for architecture 'armv7'

解决方案：

Change your compiler for C/C++/ObjectiveC Go to 

Build Settings->Build OPtions->compiler for C/C++/ObjectiveC; select Default(Apple LLVM5.0)