Global USE flags

Flag	Description	Packages
dbus		4
debug		4
doc		2
gcrypt	Enable gcrypt plugin	2
nls		2
qt6		3
static-libs		3
test		2

Category USE flags

net-im

Flag	Description	Packages
extras	Enable Psi+ patchset	2

sys-fs

Flag	Description	Packages
static		2
udev		2

Local USE flags

app-crypt

qca

Flag	Description
botan	Enable botan plugin
examples
gpg	Enable GnuPG plugin
logger	Enable logger plugin
nss	Enable NSS plugin
pkcs11	Enable PKCS#11 plugin
sasl	Enable SASL plugin
softstore	Enable softstore plugin
ssl

app-misc

qtnote

Flag	Description
gnome
kde
spell
unity	Enable Unity/Ubuntu plugin

app-text

qstardict

Flag	Description
stardict	Build backend plugin to use stardict dictionaties
web	Build backend plugin to use online dictionaties

games-action

oolite

Flag	Description
${IUSE}

media-sound

qomp

Flag	Description
cuteradioplugin	cuteRadio plugin
lastfmplugin	Last.FM plugin
mprisplugin	MPRIS plugin
myzukaruplugin	myzuka.ru plugin
notificationsplugin	notifications plugin
poiskmplugin	poiskm.me plugin
tunetofileplugin	Tune To File plugin
urlplugin	URL Plugin
yandexmusicplugin	Yandex.Music plugin

net-im

psi

Flag	Description
X
aspell	Enable spellchecking using <pkg>app-text/aspell</pkg>
enchant	Enable spellchecking using <pkg>app-text/enchant</pkg>
hunspell	Enable spellchecking using <pkg>app-text/hunspell</pkg>
iconsets	Install additional iconsets, some of them have no clear licensing
keyring	Enable storing password in system keyring manager
webengine	Enable themed, html-based chatlogs using <pkg>dev-qt/qtwebengine</pkg>

psi-plugins-meta

Flag	Description
attention	Enable Psi plugin for making attention (XEP-0224)
autoreply	Enable Psi plugin to gnerate automatic replies.
birthdayreminder	Enable Psi plugin to remind contact's birthdays
chess	Enable Psi plugin to play chess with your friends
cleaner	Enable Psi plugin for profile cleaning for specified contacts.
clientswitcher	Enable Psi plugin for client version masking
conferencelogger	Enable Psi plugin which saves logs of conferences
contentdownloader	Enable Psi plugin for downloading extras
enummessages	Enable Psi plugin to enumarate messages added to chat
extendedmenu	Enable Psi plugin which adds special submenu to contacts
extendedoptions	Enable Psi plugin for UI for some hidden options
gnupg	Enable Psi plugin for GnuPG message encryption
gomokugame	Enable Psi plugin for Gomoku game
historykeeper	Enable Psi plugin to keep certain contacts history clean
icqdie	Enable Psi plugin generating weird replies to icq transport contacts.
image	Enable Psi plugin for sending in-band images
imagepreview	Enable Psi plugin to preview images in chat log
jabberdisk	Enable Psi plugin for file sharing via jabber disk
juick	Enable Psi plugin for juick.com service
messagefilter	Enable Psi plugin to filter out messages by various conditions
omemo	Enable Psi plugin for OMEMO
openpgp	Enable Psi plugin to manager OpenPGP keys and settings
otr	Enable Psi plugin for OTR message ecnryption
pepchangenotify	Enable Psi plugin to show PEP change notifications
qipxstatuses	Enable Psi plugin for QIP xStatus to xmpp user moods translation
screenshot	Enable Psi plugin to quickly make screenshots
skins	Enable Psi plugin for skins support.
stopspam	Enable Psi plugin for spam blocking
storagenotes	Enable Psi plugin for Jabber notes protocol extension
translate	Enable Psi plugin to fix incorrect input
videostatus	Enable Psi plugin for settings some status during video watching
watcher	Enable Psi plugin for watching on contacts

psimedia

Flag	Description
demo	Build demo application and its version of the plugin
psi	Build a plugin for <pkg>net-im/psi</pkg>

net-libs

jdns

Flag	Description
qt5
tools	Enable jdns test tools

net-print

samsung-unified-driver

Flag	Description
cups
network	Enable network printing support
scanner

sys-fs

cryptsetup

Flag	Description
argon2	Enable password hashing algorithm from <pkg>app-crypt/argon2</pkg>
fips	Enable FIPS mode restrictions
gcryptargon2	Use <pkg>dev-libs/libgcrypt</pkg> for Argon2 support. Otherwise use implmentation based on <pkg>app-crypt/argon2</pkg> if enabled
hwopal
kernel	Use kernel crypto backend (mainly for embedded systems)
nettle	Use <pkg>dev-libs/nettle</pkg> crypto backend
openssl	Use <pkg>dev-libs/openssl</pkg> crypto backend
pwquality	Use <pkg>dev-libs/libpwquality</pkg> for password quality checking
ssh	Build cryptsetup-ssh for experimental support of token via SSH-server
urandom	Use /dev/urandom instead of /dev/random

lvm2

Flag	Description
lvm	Build all of LVM2 including daemons and tools like lvchange, not just the device-mapper library (for other packages to use). If your system uses LVM2 for managing disks and partitions, enable this flag.
readline
sanlock	Enable lvmlockd with support for sanlock
selinux
systemd
thin	Support for thin volumes
valgrind

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