rpm -ql phonon-devel | grep Phonon | head -n1 /usr/include/kde4/KDE/Phonon pkg-config --cflags phonon -DQT_SHARED -I/usr/include/kde4 -I/usr/include/qt4 -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtDBus -I/usr/include/qt4/QtXml /usr/include/kde4/KDE/ нету-(( по идее надо перенести /usr/include/kde4/KDE/Phonon/* в /usr/include/kde4/Phonon и все будет хорошо.
Нужно использовать <phonon/Something>