#if HAVE_SYS_SOUNDCARD_H
case 'o': backend = playrtp_oss; break;
#endif
#if HAVE_COREAUDIO_AUDIOHARDWARE_H
case 'c': backend = playrtp_coreaudio; break;
#endif
#if HAVE_SYS_SOUNDCARD_H
case 'o': backend = playrtp_oss; break;
#endif
#if HAVE_COREAUDIO_AUDIOHARDWARE_H
case 'c': backend = playrtp_coreaudio; break;
#endif