Created attachment 849537 [details] build.log If you emerge gui-libs/wlroots-0.16.1 with x11-backend USE flag enabled, it fails to configure because x11-libs/xcb-util-renderutil is missing. I attached the build log Manually running `emerge -1 x11-libs/xcb-util-renderutil` will allow compilation of wlroots.
Closed by https://bugs.gentoo.org/902889 *** This bug has been marked as a duplicate of bug 902889 ***