objective c - -fobjc-nonfragile-abi2 on LLVM compiler 2.0: unknow argument? -

i tried built project on xcode llvm compiler 2.0 , gives error:

error: unknown argument: '-fobjc-nonfragile-abi2' 

i'm not familiar llvm compilers, has solution?

removing argument doesn't solve problem, because code has errors in situation.

that option no longer necessary default setting in latest version of llvm.