$ emerge --info
Portage 3.0.28 (python 3.9.7-final-0, default/linux/amd64/17.1/desktop/plasma/systemd, gcc-10.3.0, glibc-2.33-r7, 5.11.22-gentoo-x86_64 x86_64)
=================================================================
                         System Settings
=================================================================
System uname: Linux-5.11.22-gentoo-x86_64-AMD_Ryzen_9_5950X_16-Core_Processor-with-glibc2.33
KiB Mem:    32858480 total,  17261804 free
KiB Swap:   67108860 total,  53044732 free
Timestamp of repository gentoo: Sat, 13 Nov 2021 21:36:36 +0000
Head commit of repository gentoo: 621915f5e16e52d9151a0a483a4fe9a65053ec98

sh bash 5.1_p8
ld GNU ld (Gentoo 2.37_p1 p0) 2.37
app-shells/bash:          5.1_p8::gentoo
dev-java/java-config:     2.3.1::gentoo
dev-lang/perl:            5.34.0-r3::gentoo
dev-lang/python:          3.9.7_p1::gentoo
dev-lang/rust:            1.56.1::gentoo
dev-util/cmake:           3.20.5::gentoo
sys-apps/baselayout:      2.7::gentoo
sys-apps/sandbox:         2.28::gentoo
sys-devel/autoconf:       2.13-r1::gentoo, 2.71-r1::gentoo
sys-devel/automake:       1.16.4::gentoo
sys-devel/binutils:       2.37_p1::gentoo
sys-devel/gcc:            10.3.0-r2::gentoo, 11.2.0::gentoo
sys-devel/gcc-config:     2.4::gentoo
sys-devel/libtool:        2.4.6-r6::gentoo
sys-devel/make:           4.3::gentoo
sys-kernel/linux-headers: 5.10::gentoo (virtual/os-headers)
sys-libs/glibc:           2.33-r7::gentoo
Repositories:

gentoo
    location: /var/db/repos/gentoo
    sync-type: git
    sync-uri: git://<redacted (local mirror)>/portage
    priority: -1000

steam-overlay
    location: /var/lib/layman/steam-overlay
    sync-type: laymansync
    sync-uri: https://github.com/anyc/steam-overlay.git
    masters: gentoo
    priority: 50

ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="@FREE"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=native -O2 -pipe -ggdb"
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 /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c"
CXXFLAGS="-march=native -O2 -pipe -ggdb"
DISTDIR="/var/cache/distfiles"
EMERGE_DEFAULT_OPTS="--jobs=32 --load-average=30"
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 -pipe -ggdb"
FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs cgroup compressdebug config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync mount-sandbox multilib-strict network-sandbox news parallel-fetch parallel-install pid-sandbox preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms splitdebug strict test unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-march=native -O2 -pipe -ggdb"
GENTOO_MIRRORS="http://distfiles.gentoo.org"
LANG="en_US.utf8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,--hash-style=gnu"
MAKEOPTS="--jobs=32 --load-average=30"
PKGDIR="/var/cache/binpkgs"
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"
USE="X a52 aac acl acpi activities alsa alsa-plugin amd64 bash-completion bluetooth branding bzip2 cairo cdda cdr cli corefonts crypt cups dbus declarative device-mapper dmraid dri dts dvd dvdr egl emboss encode exif fat flac fortran gdbm gif gles2 graphite grub gtk gui gzip iconv icu initramfs introspection iostats ipv6 jpeg kde kipi kms kwallet lcms libglvnd libkms libnotify libtirpc lto lzma mad magic mdadm mng mp3 mp4 mpeg multilib ncurses nls nptl ntfs ogg opengl openmp pam pango pcre pcre32 pdf pgo pic pie pipewire plasma png policykit ppds privsep pulseaudio python qml qt5 readline sdl seccomp semantic-desktop spell split-usr ssl startup-notification svg sync-plugin-portage systemd test tiff truetype udev udisks unicode upower usb vaapi vdpau vim-syntax vorbis vulkan widgets wxwidgets x264 xattr xcb xkb xml xscreensaver xv xvfb xvid zlib zstd" ABI_X86="64" ADA_TARGET="gnat_2019" 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 avx2 f16c fma3 mmx mmxext pclmul popcnt rdrand sha sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3" 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="en-US en" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LUA_SINGLE_TARGET="lua5-1" LUA_TARGETS="lua5-1" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php7-3 php7-4" POSTGRES_TARGETS="postgres12 postgres13" PYTHON_SINGLE_TARGET="python3_9" PYTHON_TARGETS="python3_9" RUBY_TARGETS="ruby26 ruby27" USERLAND="GNU" VIDEO_CARDS="amdgpu fbdev radeon 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"
Unset:  CC, CPPFLAGS, CTARGET, CXX, INSTALL_MASK, LC_ALL, LINGUAS, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, RUSTFLAGS

$ emerge -pv mesa

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild     U  ] media-libs/mesa-21.2.5::gentoo [21.1.7::gentoo] USE="X classic egl gallium gbm gles2 llvm test vaapi vdpau vulkan wayland zstd -d3d9 -debug -gles1 -lm-sensors -opencl -osmesa (-selinux) -unwind -valgrind -vulkan-overlay -xa -xvmc -zink (-dri3%*)" ABI_X86="32 (64) (-x32)" CPU_FLAGS_X86="sse2%*" VIDEO_CARDS="radeon radeonsi -crocus% (-freedreno) -i915 -i965 -intel -iris (-lima) -nouveau (-panfrost) -r100 -r200 -r300 -r600 (-v3d) (-vc4) -virgl (-vivante) -vmware" 0 KiB

Total: 1 package (1 upgrade), Size of downloads: 0 KiB