- project
    - app
       - src.../cpp/
       - src.../java/
    - other modules...

externalNativeBuild {
    cmake {
        path "CMakeLists.txt"
    }
}

buildTypes {
   ...
    debug {
        debuggable true
        jniDebuggable true
        externalNativeBuild {
            cmake {
                arguments "-DCMAKE_BUILD_TYPE=Debug"
                abiFilters "armeabi-v7a", "armeabi", "x86"
            }
        }
    }
}

productFlavors {
    ...
    experimental {
        externalNativeBuild {
            cmake {
                targets "sqlite_gcd_func"
            }
        }
    }
}

cmake_minimum_required(VERSION 3.6)

add_library( # Specifies the name of the library.
         sqlite_gcd_func
         # Sets the library as a shared library.
         MODULE
         # Provides a relative path to your source file(s).
         src/Experimental/cpp/GreatCircleDistance.cpp )
# Specifies a path to native header files.
include_directories(src/Experimental/cpp/include/)

Select load_extension('libsqlite_gcd_func', null)

java.lang.System.loadLibrary("sqlite_gcd_func");