With some more building, it seems compiling qtbase with GCC5 does not help in enabling the upstream (now default in Qt 5.5 & 5.4.2) patches, bringing back the -Bsymbolic for armhf and using the -reduce-relocations option. The symptoms are similar with this qtbase compiled with GCC5. I've saved the compilation at https://launchpad.net/~timo-jyrinki/+archive/ubuntu/qt-reduce-relocations and attaching unity8.log (with "Cannot assign object to list").
With some more building, it seems compiling qtbase with GCC5 does not help in enabling the upstream (now default in Qt 5.5 & 5.4.2) patches, bringing back the -Bsymbolic for armhf and using the -reduce-relocations option. The symptoms are similar with this qtbase compiled with GCC5. I've saved the compilation at https:/ /launchpad. net/~timo- jyrinki/ +archive/ ubuntu/ qt-reduce- relocations and attaching unity8.log (with "Cannot assign object to list").