Cant link latest git version - solved (GCC updated during build!)
Did a git pull about 2 hrs ago and make release got to linking and
/home/tom/Programming/MuseScore/mscore/importmidi/importmidi_beat.cpp:292: undefined reference to `BeatTracker::beatTrack(std::__cxx11::list > const&)'
collect2: error: ld returned 1 exit status