Building Architecture List: armeabi-v7a arm64-v8a x86 x86_64 Envirionment Variables: ANDROID_SDK_ROOT : Setting the Android NDK path ('../ndk' is built-in Android NDK). ABI : Setting the Architecture. If you are going to compile all architectures ./build-all.sh. If you are going to compile a single architecture: ANDROID_SDK_ROOT=../ndk ABI=selectedarchitecture ./build.sh