$ make -C bld -j 4
make: Entering directory `/home/gio/sources/jass-0.9.3/bld'
make[1]: Entering directory `/home/gio/sources/jass-0.9.3/bld'
make[2]: Entering directory `/home/gio/sources/jass-0.9.3/bld'
[  2%] [  5%] [  8%] [ 10%] Generating jass.hxx, jass.cxx
Generating moc_keyboard_channel_widget.cxx
Generating moc_sample_range_widget.cxx
Generating moc_waveform_widget.cxx
[ 13%] [ 16%] [ 18%] Generating moc_main_window.cxx
Generating moc_velocity_range_widget.cxx
Generating moc_velocity_widget.cxx
[ 21%] Generating moc_dial_widget.cxx
[ 24%] [ 27%] Generating moc_keyboard_widget.cxx
[ 29%] Generating moc_adsr_widget.cxx
Generating moc_qfunctor.cxx
[ 32%] [ 35%] Generating moc_engine.cxx
Generating moc_generator_widget.cxx
Scanning dependencies of target jass
make[2]: Leaving directory `/home/gio/sources/jass-0.9.3/bld'
make[2]: Entering directory `/home/gio/sources/jass-0.9.3/bld'
[ 37%] [ 40%] Building CXX object CMakeFiles/jass.dir/voice.cc.o
[ 43%] [ 45%] Building CXX object CMakeFiles/jass.dir/adsr_widget.cc.o
Building CXX object CMakeFiles/jass.dir/generator_widget.cc.o
Building CXX object CMakeFiles/jass.dir/keyboard_widget.cc.o
[ 48%] Building CXX object CMakeFiles/jass.dir/waveform_widget.cc.o
In file included from /home/gio/sources/jass-0.9.3/keyboard_widget.h:13,
                 from /home/gio/sources/jass-0.9.3/keyboard_widget.cc:1:
/home/gio/sources/jass-0.9.3/engine.h: In constructor ‘engine::engine(const char*)’:
/home/gio/sources/jass-0.9.3/engine.h:94: error: ‘JackSessionID’ was not declared in this scope
In file included from /home/gio/sources/jass-0.9.3/waveform_widget.h:20,
                 from /home/gio/sources/jass-0.9.3/waveform_widget.cc:1:
/home/gio/sources/jass-0.9.3/engine.h: In constructor ‘engine::engine(const char*)’:
/home/gio/sources/jass-0.9.3/engine.h:94: error: ‘JackSessionID’ was not declared in this scope
In file included from /home/gio/sources/jass-0.9.3/adsr_widget.h:22,
                 from /home/gio/sources/jass-0.9.3/adsr_widget.cc:1:
/home/gio/sources/jass-0.9.3/engine.h: In constructor ‘engine::engine(const char*)’:
/home/gio/sources/jass-0.9.3/engine.h:94: error: ‘JackSessionID’ was not declared in this scope
In file included from /home/gio/sources/jass-0.9.3/waveform_widget.h:20,
                 from /home/gio/sources/jass-0.9.3/generator_widget.h:13,
                 from /home/gio/sources/jass-0.9.3/generator_widget.cc:1:
/home/gio/sources/jass-0.9.3/engine.h: In constructor ‘engine::engine(const char*)’:
/home/gio/sources/jass-0.9.3/engine.h:94: error: ‘JackSessionID’ was not declared in this scope
make[2]: *** [CMakeFiles/jass.dir/keyboard_widget.cc.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: *** [CMakeFiles/jass.dir/adsr_widget.cc.o] Error 1
make[2]: *** [CMakeFiles/jass.dir/waveform_widget.cc.o] Error 1
make[2]: *** [CMakeFiles/jass.dir/generator_widget.cc.o] Error 1
make[2]: Leaving directory `/home/gio/sources/jass-0.9.3/bld'
make[1]: *** [CMakeFiles/jass.dir/all] Error 2
make[1]: Leaving directory `/home/gio/sources/jass-0.9.3/bld'
make: *** [all] Error 2
make: Leaving directory `/home/gio/sources/jass-0.9.3/bld'