android NDK(CMakeLists.txt) with c++11

Hi I'm making a face landmark detection app in ANDROID VERSION.

I'm using Android Studio 2.3(NDK SUPPORT) So far so good except build.gradle & CMakeLists.txt setting

CMakeList.txt

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")

build.grale

defaultConfig {
    externalNativeBuild {
        cmake {
            cppFlags "-frtti -fexceptions -std=c++11"
            arguments "-DANDROID_STL=c++_shared"
        }
    }

Like above, I have a error like linker command failed with exit code 1 (use -v to see invocation)

How can I use standard c+11 without Android.mk, Application.mk file