I can't seem to compile arts from source code with JACK.  I can turn off the Jack option and all compiles correctly. This from the recent LinuxFromScratch build. Jack2-1.9.12 Trinity R14.0.4 from git pack Environment used: INFOPATH=/usr/share/info LD_LIBRARY_PATH=/opt/trinity/lib:/usr/local/tqt3/build-t/lib:/usr/local/tqt3/lib:/opt/trinity/include/jack MANPATH=/usr/share/man PATH=/usr/local/tqt3/bin:/usr/local/mysql/bin:/usr/local/sbin:/usr/local/bin:/bin:/usr/bin:/sbin:/usr/sbin:/opt/trinity/bin PKG_CONFIG_PATH=/opt/trinity/lib/pkgconfig:/usr/local/tqt3/build-t/lib/pkgconfig:/usr/local/lib/pkgconfig:/opt/trinity/include/jack DIRSTACK=() LIBDIR=/opt/trinity/lib MANDIR=/opt/trinity/man QTDIR=/usr/local/tqt3 SYSCONFDIR=/etc/trinity XDG_CONFIG_DIRS=/etc/xdg/ XDG_DATA_DIRS=/usr/share/ XDG_RUNTIME_DIR=/tmp/xdg-root     local DIR;     for DIR in ${!PATHVARIABLE};         if [ "$DIR" != "$1" ]; then             NEWPATH=${NEWPATH:+$NEWPATH:}$DIR; PREFIX=/opt/trinity XORG_PREFIX=/usr HOME=/root The error that kills the build: /sources/trinity/dependencies/arts/flow/audioiojack.cc:26:10: fatal error: jack/jack.h: No such file or directory locate jack.h finds /opt/trinity/include/jack/jack.h I notice that in the CMakeLists.txt, the files refers to var LIBJACK, which is not defined. I also remember seeing a reference to TQT3DIR somewhere, but can't find it not. did try TQT3DIR=/usr/local/tqt3 to no avail. If someone has dealt with this, a copy of your environment would be appreciated. any help before this makes me ......unrepairable.    Dave