How to enable C++11 for android?

When trying to launch on android, I get compiler errors for C++11 code. (My C++11 code compiles and works when launching on the desktop.)

I have read that you just need to set some compiler options for the Android NDK to enable C++11:
http://www.drdobbs.com/cpp/accessing-c11-features-of-the-android-nd/240168385

But I cannot see where to do this when building from unreal. Any ideas?

Example error:
SocketReader.cpp(70,3) : error: use of undeclared identifier ‘this_thread’
LogPlayLevel: UnrealBuildTool: this_thread::sleep_for(millisecs);

Is c++11 supported now for android or does it still need to be manually enabled ? If so, any help on how ?

Same here. Have no clue, and i really need my std::atomic…