equery

equery d media-libs/phonon-4.7.2
 * These packages depend on media-libs/phonon-4.7.2:
dev-qt/qtdemo-4.8.5-r1 (kde ? media-libs/phonon[aqua=])
                       (!kde ? media-libs/phonon[aqua=])
kde-base/kdelibs-4.13.3-r1 (>=media-libs/phonon-4.4.3)
kde-base/kdepimlibs-4.13.3 (media-libs/phonon[qt4])
kde-base/phonon-kde-4.13.3 (>=media-libs/phonon-4.4.3)
media-libs/phonon-gstreamer-4.6.3 (>=media-libs/phonon-4.6.0)