Created attachment 799491 [details] Build Log emerge -avuDN @world [ebuild R ] dev-qt/qtmultimedia-5.15.5-r1:5/5.15::gentoo USE="alsa gstreamer pulseaudio* qml widgets -debug -gles2-only -openal -test" 0 KiB emerge -pqv '=dev-qt/qtmultimedia-5.15.5-r1::gentoo' [ebuild R ] dev-qt/qtmultimedia-5.15.5-r1 USE="alsa gstreamer pulseaudio* qml widgets -debug -gles2-only -openal -test"
Created attachment 799493 [details] emerge --info
I think Qt does some detection of whether your CPU supports various instructions, but then because you're not using -march=foo, you get this.
(In reply to Sam James from comment #2) > I think Qt does some detection of whether your CPU supports various > instructions, but then because you're not using -march=foo, you get this. ok, maybe I should add march=xxx again?
Another way, maybe empty tree will solve this problem.
I have been rollback to march=skylake, the problem solved temporarily. I will try 'empty tree' without march=skylake. May I keep this issue open when I finish this job ?
Empty tree will solve problem.