Using C++11 with cocos2d-x for iOS + XCode.

I really need to use part of its feature such as non-uniform random number generator in which I don’t really want to re-implement it by myself.
But anyway, I don’t really want to bring in boost which is rather huge and I don’t need it all.

I want some sounds here whether if there’s any performance issue or anything else that I should not enable it while using it with XCode for iOS game.

FYI: I enabled the feature of C11 inside XCode with this similar way but instead of C0x it’s C11.
EDIT:
I mean for general terms of using C
11 in XCode for iOS development whether there’s any reasons which pull anyone from not using it.