Android Studio NDK C++11 use of undeclared identifier 'nullptr' [duplicate]

This question already has an answer here:

• Compiling C++11 sources for Android NDK 1 answer

I am using Android Studio 2.1.2 and I am not using Experimental Plugin for NDK.

I need to compile C++11 source into Android application.

I am done with all NDK setup done with sample JNI and NJI communication.

Now I need to try new keywords or features added in C++11 with Android.

Please check following files, and error I am getting.

HelloJni.cpp

char *pc = nullptr;     // OK
int  *pi = nullptr;     // OK Checking C++11

Application.mk

APP_ABI := all
APP_STL := gnustl_static

Android.mk

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE := ndksampleapp
LOCAL_SRC_FILES := HelloJni.cpp

LOCAL_CPPFLAGS := -std=gnu++11
LOCAL_CPP_FEATURES := exceptions

include $(BUILD_SHARED_LIBRARY)

build.gradle

android {
    compileSdkVersion 23
    buildToolsVersion "24.0.1"

    defaultConfig {
        applicationId "com.example.m1035325.ndksampleapp"
        minSdkVersion 15
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

    sourceSets.main {
        //jniLibs.srcDirs = [ 'src/main/libs' ]
        jniLibs.srcDir 'src/main/libs'
        //jni.srcDirs = []
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.4.0'
}

I am getting following error

Warning:Native C/C++ source code is found, but it seems that NDK option is not configured.  Note that if you have an Android.mk, it is not used for compilation.  The recommended workaround is to remove the default jni source code directory by adding:
 android {
    sourceSets {
        main {
            jni.srcDirs = []
        }
    }
}
to build.gradle, manually compile the code with ndk-build, and then place the resulting shared object in src/main/jniLibs.
 char *pc = nullptr;     // OK
            ^
C:\Users\AndroidStudioProjects\NDKSampleApp\app\src\main\jni\HelloJni.cpp
Error:(10, 12) error: 'nullptr' was not declared in this scope
Error:(11, 12) error: 'nullptr' was not declared in this scope
 int  *pi = nullptr;     // OK Checking C++11
            ^
make: *** [C:\Users\AndroidStudioProjects\NDKSampleApp\app\build\intermediates\ndk\debug\obj/local/arm64-v8a/objs/app/C_\Users\AndroidStudioProjects\NDKSampleApp\app\src\main\jni\HelloJni.o] Error 1
:app:compileDebugNdk FAILED
Error:Execution failed for task ':app:compileDebugNdk'.
> com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Users\AppData\Local\Android\Sdk\ndk-bundle\ndk-build.cmd'' finished with non-zero exit value 2
Information:BUILD FAILED