$ grep -r HAVE_LIBJACK .
./configure:#define HAVE_LIBJACK
./configure.ac: AC_DEFINE([HAVE_LIBJACK], [], [])
./src/Settings.cpp:#ifdef HAVE_LIBJACK
./src/Player.hpp:#ifdef HAVE_LIBJACK
./src/Player.hpp:#ifdef HAVE_LIBJACK
./src/Player.hpp:#ifdef HAVE_LIBJACK
./src/Recorder.hpp:#ifdef HAVE_LIBJACK
./src/Recorder.hpp:#ifdef HAVE_LIBJACK
./src/Recorder.hpp:#ifdef HAVE_LIBJACK
./src/Player.cpp:#ifdef HAVE_LIBJACK
./src/Player.cpp:#ifdef HAVE_LIBJACK
./src/Player.cpp:#ifdef HAVE_LIBJACK
./src/Player.cpp:#ifdef HAVE_LIBJACK
./src/Player.cpp:#ifdef HAVE_LIBJACK
./src/Player.cpp:#ifdef HAVE_LIBJACK
./src/Player.cpp:#ifdef HAVE_LIBJACK
./src/config.h.in:#undef HAVE_LIBJACK
./src/Recorder.cpp:#ifdef HAVE_LIBJACK
./src/Recorder.cpp:#ifdef HAVE_LIBJACK
./src/Recorder.cpp:#ifdef HAVE_LIBJACK
./src/Recorder.cpp:#ifdef HAVE_LIBJACK
./src/Recorder.cpp:#ifdef HAVE_LIBJACK