Support for GSS API in client APIs (Linux, C++, ODBC) for delegated credentials

Is there any way to pass a GSS credential (gss_cred_id_t) into the C++ ODBC client on Linux? The embedded credential is a delegated MIT Kerberos token. So far, the only GSS/Kerberos support I'm seeing is in vsql, but support for GSS/Kerberos is part of the core product. How do you see this working???