targavfd does compile against VDR 2.3.4 but does prevent to run VDR ...
I have build targavfd latest bits against VDR 2.3.4, but the plugin does prevent to start VDR:
May 6 19:02:00 vdr4 vdr:  targaVFD: watch thread thread started (pid=9070, tid=9106, prio=high)
May 6 19:02:00 vdr4 vdr:  loading /var/cache/vdr/cam.data
May 6 19:02:00 vdr4 vdr:  ERROR: cStateKey::~cStateKey() called without releasing the lock first (tid=0, lock=Schedules, key=0x7f9a05ae3bd0)
May 6 19:02:00 vdr4 vdr:  ABORT!
After disabling vdr-plugin-targavfd, VDR does start flawless.