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

Index: protoc-c/c_enum.h
--- protoc-c/c_enum.h.orig
+++ protoc-c/c_enum.h
@@ -106,8 +106,6 @@ class EnumGenerator {
  private:
   const EnumDescriptor* descriptor_;
   std::string dllexport_decl_;
-
-  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(EnumGenerator);
 };
 
 }  // namespace c