Hints? Sure, try asking in the correct forum
http://www.qtcentre.org/forums/3-Qt-Tools


Also try reading your linker error.
/usr/bin/ld: /usr/local/lib/libosgViewer.so: undefined reference to symbol 'osgUtil::IntersectionVisitor::IntersectionVisitor(osgUtil::Intersector*, osgUtil::IntersectionVisitor::ReadCallback*)'

/usr/bin/ld: note: 'osgUtil::IntersectionVisitor::IntersectionVisitor(osgUtil::Intersector*, osgUtil::IntersectionVisitor::ReadCallback*)' is defined in DSO /usr/local/lib/libosgUtil.so so try adding it to the linker command line