mario@Sibling ~ $ sudo emerge --depclean --verbose libdrm
Password:

Calculating dependencies... done!
  x11-libs/libdrm-2.4.100 pulled in by:
    dev-libs/efl-1.22.6 requires x11-libs/libdrm
    kde-plasma/kwin-5.17.4-r1 requires x11-libs/libdrm
    media-libs/gst-plugins-bad-1.14.5 requires >=x11-libs/libdrm-2.4.55[abi_x86_32(-),abi_x86_64(-)]
    media-libs/gst-plugins-base-1.14.5-r1 requires x11-libs/libdrm
    media-libs/mesa-19.1.8 requires >=x11-libs/libdrm-2.4.97[video_cards_radeon], >=x11-libs/libdrm-2.4.97[video_cards_amdgpu], >=x11-libs/libdrm-2.4.97[abi_x86_32(-),abi_x86_64(-)]
    sys-auth/consolekit-1.2.1 requires x11-libs/libdrm:=, x11-libs/libdrm:0/0=
    x11-base/xorg-server-1.20.5 requires >=x11-libs/libdrm-2.4.89
    x11-drivers/xf86-video-ati-19.1.0 requires >=x11-libs/libdrm-2.4.89[video_cards_radeon], x11-libs/libdrm
    x11-libs/libva-1.7.3 requires >=x11-libs/libdrm-2.4.46[abi_x86_32(-),abi_x86_64(-)]
    x11-misc/compton-0.1_beta2 requires x11-libs/libdrm

>>> No packages selected for removal by depclean
Packages installed:   1088
Packages in world:    112
Packages in system:   43
Required packages:    1088
Number removed:       0