https://github.com/protobuf-c/protobuf-c/pull/673

Index: protoc-c/c_service.h
--- protoc-c/c_service.h.orig
+++ protoc-c/c_service.h
@@ -100,8 +100,6 @@ class ServiceGenerator {
 
   const ServiceDescriptor* descriptor_;
   std::map<std::string, std::string> vars_;
-
-  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ServiceGenerator);
 };
 
 }  // namespace c