ClassLoader::classloader_type() is only defined when INCLUDE_CDS is true. It's called from following code in classLoaderExt.hpp, which causes build failure when INCLUDE_CDS is 0.

    instanceKlassHandle record_result(Symbol* class_name,
                                      ClassPathEntry* e,
                                      const s2 classpath_index,
                                      instanceKlassHandle result, TRAPS) {
      if (ClassLoader::add_package(_file_name, classpath_index, THREAD)) {
        if (DumpSharedSpaces) {
          s2 classloader_type = ClassLoader::classloader_type(
                          class_name, e, classpath_index, CHECK_(result));
          result->set_shared_classpath_index(classpath_index);
          result->set_class_loader_type(classloader_type);
        }
        return result;
      } else {
        return instanceKlassHandle(); // NULL
      }
    }