// Token concatenation ## does not macro expand macro function args, so is usually wrapped by another macro function
            #define CONCAT_FUNCTION2(X, Y) X ## Y
            #define CONCAT_FUNCTION(X, Y) CONCAT_FUNCTION2(X, Y)
        """

        def headerFile = file("app/src/main/headers/hello.h") << """
            #define MESSAGE "one"
        """

        appSourceFile.text = """