* /var/tmp/portage/x11-libs/libdrm-2.4.74/work/libdrm-2.4.74/xf86drmMode.c:904:15: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] That's all it found though so hopefully it'll be a simpler fix.
It's now fixed upstream. I'm not really interested in such bugs. We're not going to pick them back to Gentoo. Please feel free to file them upstream, but there's no point in alerting x11@.