Заранее извиняюсь за жирность у меня с вэйландом нет проблем.

Флаги такие попробуйте

emerge --info
Portage 3.0.30 (python 3.9.12-final-0, default/linux/amd64/17.1/desktop/plasma, gcc-12.1.0, glibc-2.34-r13, 5.17.7-lqx1-x86_64 x86_64)
=================================================================
System uname: Linux-5.17.7-lqx1-x86_64-x86_64-AMD_FX-tm-9590_Eight-Core_Processor-with-glibc2.34
KiB Mem:    16292836 total,  13715040 free
KiB Swap:   16252924 total,  16252924 free
Timestamp of repository gentoo: Sun, 15 May 2022 21:30:01 +0000
Head commit of repository gentoo: 8081b6274bfa519e00d7d4692b39d3e1dde220e0
sh bash 5.1_p16
ld GNU ld (Gentoo 2.37_p1 p2) 2.37
app-misc/pax-utils:        1.3.3::gentoo
app-shells/bash:           5.1_p16::gentoo
dev-java/java-config:      2.3.1::gentoo
dev-lang/perl:             5.34.0-r9::gentoo
dev-lang/python:           3.9.12::gentoo, 3.10.4::gentoo
dev-lang/rust:             1.60.0::gentoo
dev-util/cmake:            3.22.2::gentoo
dev-util/meson:            0.61.4-r2::gentoo
sys-apps/baselayout:       2.7-r3::gentoo
sys-apps/openrc:           0.44.10::gentoo
sys-apps/sandbox:          2.29::gentoo
sys-devel/autoconf:        2.13-r1::gentoo, 2.71-r1::gentoo
sys-devel/automake:        1.16.5::gentoo
sys-devel/binutils:        2.37_p1-r2::gentoo
sys-devel/binutils-config: 5.4.1::gentoo
sys-devel/clang:           14.0.3::gentoo
sys-devel/gcc:             12.1.0::gentoo
sys-devel/gcc-config:      2.5-r1::gentoo
sys-devel/libtool:         2.4.6-r6::gentoo
sys-devel/lld:             14.0.3::gentoo
sys-devel/llvm:            14.0.3::gentoo
sys-devel/make:            4.3::gentoo
sys-kernel/linux-headers:  5.17-r1::gentoo (virtual/os-headers)
sys-libs/glibc:            2.34-r13::gentoo
Repositories:

gentoo
    location: /usr/portage
    sync-type: rsync
    sync-uri: rsync://rsync.gentoo.org/gentoo-portage
    priority: -1000
    sync-rsync-verify-jobs: 1
    sync-rsync-extra-opts:
    sync-rsync-verify-max-age: 24
    sync-rsync-verify-metamanifest: yes

мой-оверлей
    location: /usr/local/overlay/portage
    masters: gentoo
    priority: 0

ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="*"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=native -O2 -fomit-frame-pointer -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/lib64/libreoffice/program/sofficerc /usr/share/config /usr/share/gnupg/qualified.txt"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-march=native -O2 -fomit-frame-pointer -pipe"
DISTDIR="/usr/portage/distfiles"
ENV_UNSET="CARGO_HOME DBUS_SESSION_BUS_ADDRESS DISPLAY GOBIN GOPATH PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR"
FCFLAGS="-march=native -O2 -fomit-frame-pointer -pipe"
FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs buildpkg-live config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync multilib-strict network-sandbox news parallel-fetch pid-sandbox preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-march=native -O2 -fomit-frame-pointer -pipe"
GENTOO_MIRRORS="http://distfiles.gentoo.org"
LANG="ru_RU.UTF-8"
LC_ALL="ru_RU.UTF-8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
LINGUAS="ru ru_RU en"
MAKEOPTS="-j6"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git"
PORTAGE_TMPDIR="/var/tmp"
SHELL="/bin/bash"
USE="X a52 aac aacs acl acpi activities all_sfx alsa alsa-plugin amd64 amr amrenc archive avif bcache bdplus bluray branding bs2b bzip2 cairo cdda cdio cdr clang cli conntrack cpudetection crypt cube custom-cflags dbus djbfft djvu dri dri3 drm dts dvd dvdr egl elogind encode eps exif fdk ffmpeg flac flite fontconfig fortran gbm gdbm gif gles1 gles2 glslang gme gmp gsm gtk gui hwloc iconv icu java jpeg jpeg2k kbd kde kdesu kwallet ladspa layers lcms libaom libdrm libglvnd libilbc libmpv libnotify libsamplerate libsoxr libtirpc libxml2 lm-sensors lv2 lz4 lzma lzo mad mjpeg mng modplug mp3 mp4 mpeg multilib musepack ncurses nls nptl ntp offload ogg ompt openal opencl opengl openh264 openmp openssl opus pam pango pcre pdf pdfimport plasma png policykit postproc ppds pulseaudio python qml qt5 rar raw readline sdl seccomp semantic-desktop snappy spell spirv-tools split-usr srt ssl startup-notification svg system-llvm theora tiff truetype twolame udev udisks unicode upower usb utils vaapi vapoursynth vorbis vulkan vulkan-overlay wayland webp widgets wxwidgets x264 x265 xattr xcb xml xv xvid zimg zip zlib zstd" ABI_X86="64 32" ADA_TARGET="gnat_2020" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="karbon sheets words" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="aes avx f16c fma3 fma4 mmx mmxext pclmul popcnt sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 xop" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="libinput" KERNEL="linux" L10N="ru en" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LLVM_TARGETS="AMDGPU BPF" LUA_SINGLE_TARGET="lua5-1" LUA_TARGETS="lua5-1" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php7-4 php8-0" POSTGRES_TARGETS="postgres12 postgres13" PYTHON_SINGLE_TARGET="python3_9" PYTHON_TARGETS="python3_9" RUBY_TARGETS="ruby26 ruby27" USERLAND="GNU" VIDEO_CARDS="amdgpu radeonsi" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq proto steal rawnat logmark ipmark dhcpmac delude chaos account"

Про кде

USE="dri3 glslang egl gles1 gles2 vaapi vulkan layers spirv-tools vulkan-overlay cube lm-sensors opencl theora ffmpeg conntrack pulseaudio rar lzo lzma zstd zip lz4 webp openal opus zimg postproc python pdfimport libsamplerate raw jpeg2k djvu ntp kbd djbfft x265 libsoxr openssl libdrm libaom ladspa fontconfig fdk cdio bs2b bluray aacs bdplus postproc mjpeg srt gmp java kdesu hwloc offload ompt all_sfx custom-cflags bcache alsa-plugin vapoursynth archive libmpv drm amr amrenc cpudetection flite gme gsm gbm libilbc twolame libxml2 lv2 modplug snappy musepack utils spell clang openh264 avif eps wayland system-llvm -unwind -vlc -vdpau -realtime -gpm -geolocation -handbook -bluetooth -telepathy -wireless -wallpapers -webengine -cups -emboss -declarative -ipv6 -networkmanager -phonon -gecko -libglvnd"