MRG: how to suspend or enable logging of qpid client library?

Issue

• We are using C++ qpid client. From time to time, the library writes to standard output some warning logs (i.e. connection is closed). As we require writing to standard output to be fully managed by our application, how can we switch off all such logging coming from the qpid client library?

• We need to debug C++ qpid client. How to enable its logging / put to more verbosity?