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)