Building RingRTC and webrtc for Whisperfish

NOTE Sept 2025: Whisperfish does not have support for calling, yet. To include support for calling, we need a lot more work than just compiling the RingRTC library. This blog post documents the process of building and linking the RingRTC system into Whisperfish, but some users have interpreted this as to imply voice and video calling support. This is not the case. Currently, Whisperfish correctly…