What does GNU Bayonne use?

GNU Common C++: portable core runtime library for threads, sockets, XML parsing, and synchronization.

GNU ccAudio: portable processing of audio files and samples.

GNU ccScript: generic high availability runtime class extensible scripting engine.

GNU ccRTP: threaded scalable multiport RTP media streaming library.

GNU oSIP: threaded scalable SIP stack for use in both user agent and server development.