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POTypes are incomplete due to include guards
 

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    <p>I am trying to get a project to compile, and I am running into a problem with incomplete types. Here is the output from make:</p> <pre><code>In file included from ../common/ClientCommunication.h:13, from EchoService_stub.h:9, from EchoService_stub.cpp:1: ../common/Naming_stub.h:16: error: field ‘clientCommunication’ has incomplete type In file included from EchoService_stub.h:9, from EchoService_stub.cpp:1: ../common/ClientCommunication.h:20: error: field ‘serverEndpoint’ has incomplete type make: *** [EchoService_stub.o] Error 1 </code></pre> <p>Here are my header files in question:</p> <p>In Naming_stub.h:</p> <pre><code>ifndef NAMING_STUB_H__ #define NAMING_STUB_H__ #include &lt;string&gt; #include &lt;string.h&gt; #include "Naming.h" class ClientCommunication; class Naming_stub : public Naming { private: ClientCommunication clientCommunication; protected: // Protected Methods Here. public: // Public Methods Here. }; #endif </code></pre> <p>In Naming.h</p> <pre><code>#ifndef NAMING_H__ #define NAMING_H__ #include "Remote.h" #include "../util/RemoteException.h" class Naming { private: protected: public: virtual Remote* lookup(std::string lookupURL) throw (RemoteException); virtual void bind() throw (RemoteException); ~Naming(); }; #endif // NAMING_H__ </code></pre> <p>Finally, there is the ClientCommunication.h file:</p> <pre><code>#ifndef CLIENT_COMMUNICATION_H__ #define CLIENT_COMMUNICATION_H__ #include &lt;iostream&gt; #include &lt;cstdlib&gt; #include &lt;sys/types.h&gt; #include &lt;sys/socket.h&gt; #include &lt;arpa/inet.h&gt; #include "../util/RemoteTypes.h" #include "Naming_stub.h" struct Endpoint; class ClientCommunication { private: int socket_fd; struct Endpoint serverEndpoint; protected: public: ClientCommunication(const struct Endpoint&amp; serverEndpoint_in); struct Buffer send(struct Buffer&amp; callBuffer); ~ClientCommunication(); }; #endif // CLIENT_COMMUNICATION_H__ </code></pre> <p>Sorry that this is so long, but there is one more header file. The Endpoint struct is declare in RemoteTypes.h, which looks like the following: </p> <pre><code>#ifndef REMOTE_EXCEPTION_H__ #define REMOTE_EXCEPTION_H__ #include &lt;netinet/in.h&gt; struct Endpoint { int port; char* service_id; char* server_ip; struct sockaddr_in host_name; }; struct Buffer { char* contents; int size; }; #endif </code></pre> <p>Thanks!</p>
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    1. CODon't use double-underscores in your identifiers, [they're reserved](http://stackoverflow.com/questions/228783/what-are-the-rules-about-using-an-underscore-in-a-c-identifier).
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