x11-drivers/xf86-video-amdgpu should depend on virtual/libudev:= via "udev" USE-flag - just like x11-drivers/xf86-video-ati.
$ ldd /usr/lib64/xorg/modules/drivers/amdgpu_drv.so | grep udev libudev.so.1 => /lib64/libudev.so.1 (0x00007f530e620000) $ grep -rl udev /var/db/pkg/x11-drivers/xf86-video-amdgpu-18.1.0/ /var/db/pkg/x11-drivers/xf86-video-amdgpu-18.1.0/NEEDED /var/db/pkg/x11-drivers/xf86-video-amdgpu-18.1.0/NEEDED.ELF.2 /var/db/pkg/x11-drivers/xf86-video-amdgpu-18.1.0/REQUIRES $
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=a2ffd7261021575395aa15181a1d873f58a6ce76 commit a2ffd7261021575395aa15181a1d873f58a6ce76 Author: Alexander Tsoy <alexander@tsoy.me> AuthorDate: 2018-10-26 14:33:53 +0000 Commit: Matt Turner <mattst88@gentoo.org> CommitDate: 2018-10-27 19:35:48 +0000 x11-drivers/xf86-video-amdgpu: add "udev" USE flag This fixes automagic dependency on udev. Closes: https://bugs.gentoo.org/667058 Closes: https://github.com/gentoo/gentoo/pull/10236 Signed-off-by: Alexander Tsoy <alexander@tsoy.me> Signed-off-by: Matt Turner <mattst88@gentoo.org> .../xf86-video-amdgpu/xf86-video-amdgpu-18.1.0.ebuild | 10 ++++++++-- x11-drivers/xf86-video-amdgpu/xf86-video-amdgpu-9999.ebuild | 12 +++++++++--- 2 files changed, 17 insertions(+), 5 deletions(-)