+%bcond_without srtp # SRTP (secure RTP) support
+# audio I/O
+%bcond_without alsa # ALSA sound I/O support
+%bcond_with arts # aRts sound I/O support
+%bcond_with portaudio # PortAudio sound I/O support
+%bcond_without pulseaudio # PulseAudio sound I/O support