[LAU] Building linux sampler from source with Jack support

Hey all, I know I saw somewhere that there is an argument needed for configure to enable jack support. Can someone point me to documentation regarding how to build this? I have it up and running, but the only output option is ALSA. Here is the message that it starts with: LinuxSampler 0.5.1 Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck Copyright (C) 2005-2007 Christian Schoenebeck Detected features: MMX SSE SSE2 Creating Sampler...OK Registered sampler engines: 'GIG' Registered MIDI input drivers: ALSA Registered audio output drivers: ALSA Loading instrument editor plugins...OK Registered instrument editors: Starting LSCP network server (0.0.0.0:8888)...OK LinuxSampler initialization completed. :-) Thank you! Kjel