Local – Gentoo Packages

acct-user/git

acct-user/vdr

app-accessibility/at-spi2-core

dbus-broker

Use DBus broker implementation instead of default DBus daemon

app-accessibility/brltty

api

build brltty's application program interface

beeper

support the console tone generator

fm

support for the sound card synthesizer

louis

Use braille translator dev-libs/liblouis

midi

support the musical instrument digital interface

pcm

support for sound card digital audio

app-accessibility/emacspeak

espeak

Adds support for the espeak tts engine

app-accessibility/espeak-ng

async

Enables asynchronous commands

klatt

Enables Klatt formant synthesis and implementation

l10n_ru

Builds extended Russian Dictionary file

l10n_zh

Builds extended Chinese (Mandarin and Cantonese) Dictionary files

man

Builds and installs manpage with app-text/ronn-ng

mbrola

Adds support for mbrola voices

app-accessibility/flite

voices

Install synthetic voices

app-accessibility/freetts

jsapi

build Java Speech API (JSAPI)

mbrola

Adds support for mbrola voices

app-accessibility/orca

braille

Enable braille support

app-accessibility/speech-dispatcher

espeak

Adds support for espeak-ng speech engine

flite

Adds support for flite speech engine

app-admin/clsync

apidoc

Provide doxygen generated API docs.

cgroups

Use cgroups to limit /dev access.

clsync

Build clsync binary. Most likely you want it. However it is possible to build only libclsync without clsync itself.

cluster

Enable clustering support (allows master-master clsync on multiple hosts). Not fully implemented yet.

control-socket

Enable AF_UNIX control socket support.

extra-debug

Enable extra debugging. This will hurt performance badly. Be ready for tons of output.

extra-hardened

Enable extra security checks. This will hurt performance.

gio

Enable GIO for FS monitoring (glib based alternative to inotify interface, not recommended; if both are compiled, may be selected at runtime).

highload-locks

Allows to use spinlocks for short delays instead of mutexes, but only on SMP systems.

namespaces

Enable namespaces isolation.

socket-library

Build the control and monitoring socket library: libclsync.

app-admin/conky

apcupsd

Enable support for sys-power/apcupsd

bundled-toluapp

Enable support for bundled toluapp. This only makes sense in combination with the lua-* flags

cmus

Enable monitoring of music played by media-sound/cmus

colour-name-map

Include mappings of colour name

extras

Enable syntax highlighting for app-editors/nanoand app-editors/vim

ical

Enable support for events from iCalendar (RFC 5545) files using dev-libs/libical

intel-backlight

Enable support for Intel backlight

iostats

Enable support for per-task I/O statistics

irc

Enable support for displaying everything from an irc channel using net-libs/libircclient

lua-cairo

Enable if you want Lua Cairo bindings

lua-cairo-xlib

Enable support for Cairo and Xlib interoperability for Lua

lua-imlib

Enable if you want Lua Imlib2 bindings

lua-rsvg

Enable if you want Lua RSVG bindings

math

Enable support for glibc's libm math library

moc

Enable monitoring of music played by media-sound/moc

mouse-events

Enable support for mouse events"

mpd

Enable monitoring of music controlled by media-sound/mpd

nvidia

Enable reading of nvidia card temperature sensors via x11-drivers/nvidia-drivers

portmon

Enable support for tcp (ip4) port monitoring

thinkpad

Enable support for IBM/Lenovo notebooks

webserver

Enable support to act as a webserver serving conkys output using net-libs/libmicrohttpd

xinput

Enable support for Xinput 2 (slow)

xmms2

Enable monitoring of music played by media-sound/xmms2

app-admin/conserver

freeipmi

Compile in FreeIPMI support via sys-libs/freeipmi

app-admin/diradm

automount

Support for automount data in LDAP

irixpasswd

Support for storing separate IRIX passwords

app-admin/doas

persist

Adds support for "persist" feature (experimental)

app-admin/gkrellm

gnutls

Enable SSL support for mail checking with net-libs/gnutls (overrides 'ssl' USE flag)

lm-sensors

Enable monitoring sensors via sys-apps/lm-sensors

ntlm

Enable NTLM authentication for mail checking with net-libs/libntlm

ssl

Enable SSL support for mail checking with dev-libs/openssl

X

Build both the X11 gui (gkrellm) and the server (gkrellmd). Disabling this flag builds the server only

app-admin/gtkdiskfree

gtk2

Support GTK+ 2.x instead of GTK+ 3.x

app-admin/hddtemp

network-cron

Monthly cronjob to update hddtemp.db.

app-admin/keepass

aot

Generate native code at build time, rather than runtime.

app-admin/keepassxc

autotype

Add support to autotype the passwords into other applications

browser

Enables browser plugin support

keeshare

Enable KeeShare sharing integration

network

Enable network support

yubikey

Enable database unlocking via hardware keys supporting YubiKey-style HMAC-SHA1 protocol

app-admin/lnav

pcap

Enable support for pcap files.

app-admin/logcheck

cron

Adds file to enable hourly cron job to run logcheck"

app-admin/logrotate

acl

Installs acl support

cron

Installs cron file

selinux

Installs Security Enhanced Linux support

app-admin/logstash-bin

x-pack

Enable additional features (may need a license)

app-admin/openrc-settingsd

systemd

Use the versions of dbus and polkit files provided by sys-apps/systemd

app-admin/pass

dmenu

Add support for x11-misc/dmenu with the 'passmenu' program.

git

Use dev-vcs/git for password revisions.

importers

Allow importing passwords from other password managers using various contributed scripts.

X

Use x11-misc/xclip to copy passwords to the clipboard.

app-admin/pass-otp

qrcode

Add support for qrcodes using media-gfx/qrencode

app-admin/passwordsafe

qr

Enable QR code password display

xml

Enable XML import support

yubikey

Enable support for Yubikey

app-admin/perl-cleaner

pkgcore

Use sys-apps/pkgcore instead of sys-apps/portage and app-portage/portage-utils.

app-admin/puppet

augeas

Enable augeas support

diff

Enable diff support

hiera

Enable hiera support

rrdtool

Enable rrdtool support

shadow

Enable shadow support

app-admin/puppet-agent

puppetdb

Adds puppetdb support

app-admin/puppetserver

puppetdb

Adds support for connecting to puppetdb

app-admin/pwgen

livecd

Install init script for root password scrambling on boot

app-admin/rsyslog

clickhouse

Build the ClickHouse output module (requires net-misc/curl)

curl

Enable http_request() function in RainerScript (requires net-misc/curl)

dbi

Build the general database output module (requires dev-db/libdbi)

elasticsearch

Build the Elasticsearch output module (requires net-misc/curl)

gcrypt

Add support for encrypted log files using dev-libs/libgcrypt

gnutls

Build the GnuTLS network stream driver (requires net-libs/gnutls)

imhttp

Build the http input module (requires www-servers/civetweb)

impcap

Build the pcap input module (requires net-libs/libpcap)

kafka

Build the Apache Kafka input/output module (requires dev-libs/librdkafka)

kerberos

Build the GSSAPI input and output module (requires virtual/krb5)

kubernetes

Build the kubernetes modify plugin (requires net-misc/curl)

mdblookup

Build the MaxMind DB lookup message modify plugin using dev-libs/libmaxminddb

mongodb

Build the MongoDB output module (requires dev-libs/mongo-c-driver)

mysql

Build the MySQL database output module (requires virtual/mysql)

normalize

Build the normalize modify module (requires dev-libs/libee and dev-libs/liblognorm)

omhttp

Build the http output module (requires net-misc/curl)

omhttpfs

Build the httpfs output module (requires net-misc/curl)

omudpspoof

Build the udpspoof output module (requires net-libs/libnet)

openssl

Build the OpenSSL network stream driver (requires dev-libs/openssl)

postgres

Build the PostgreSQL database output module (requires dev-db/postgresql)

rabbitmq

Build the RabbitMQ output module (requires net-libs/rabbitmq-c)

redis

Build the Redis output module using (requires dev-libs/hiredis)

relp

Build the Reliable Event Logging Protocol (RELP) output module (requires dev-libs/librelp)

rfc3195

Build the rfc3195 input module (requires dev-libs/liblogging)

rfc5424hmac

Build the rfc5424hmac modify module (requires dev-libs/openssl)

snmp

Build the snmp modify and output module (requires net-analyzer/net-snmp)

ssl

Add support for encrypted client/server communication (requires net-libs/gnutls)

systemd

Build the journal input and output module (requires sys-apps/systemd)

uuid

Include UUIDs in messages (requires sys-apps/util-linux)

xxhash

Enable xxHash support in fmhash module (requires dev-libs/xxhash)

zeromq

Build the ZeroMQ input and output modules (requires net-libs/czmq)

app-admin/sagan

libdnet

Add support for dev-libs/libdnet

pcap

Add support for network packet capture via net-libs/libpcap

redis

Add support for the Redis database via dev-libs/hiredis

smtp

Build witch SMTP (E-Mail) support

app-admin/salt

cheetah

Enable support for dev-python/cheetah3

cherrypy

Enable support for using cherrypy.

genshi

Enable support for dev-python/genshi

gnupg

Enable support for gnupg via python-gnupg.

libcloud

Enable salt-cloud support via libcloud.

libvirt

Support managing virtual machines with app-emulation/libvirt.

mako

Add support for using the mako template engine for parsing salt states.

mongodb

Support returning data to a mongodb server.

neutron

Support the OpenStack neutron network service.

nova

Enable support for the OpenStack Nova API

openssl

Add support for using TLS via OpenSSL.

portage

Add support for package state enforcement using sys-apps/portage

raet

Add support for the new RAET transport.

redis

Support returning data to a redis database.

zeromq

Add support for the zeromq transport.

app-admin/sudo

gcrypt

Use message digest functions from dev-libs/libgcrypt instead of sudo's

offensive

Let sudo print insults when the user types the wrong password

secure-path

Replace PATH variable with compile time secure paths

sendmail

Allow sudo to send emails with sendmail

sssd

Add System Security Services Daemon support

app-admin/sysklogd

logger

Build the logger program

logrotate

use app-admin/logrotate for rotating logs rather than custom cron scripts

app-admin/syslog-ng

amqp

Enable support for AMQP destinations

geoip2

Add support for geo lookup based on IPs via dev-libs/libmaxminddb

grpc

Enable GRPC based driver support (OpenTelemetry) via net-libs/grpc

http

Enable support for HTTP destinations

json

Enable support for JSON template formatting via dev-libs/json-c

kafka

Enable support for Kafka destinations

mongodb

Enable support for mongodb destinations

mqtt

Enable MQTT support via net-libs/paho-mqtt-c

pacct

Enable support for reading Process Accounting files (EXPERIMENTAL, Linux only)

redis

Enable support for Redis destinations

smtp

Enable support for SMTP destinations

spoof-source

Enable support for spoofed source addresses

app-admin/sysstat

dcron

Adjust cronjobs to work properly under sys-process/dcron

app-admin/testdisk

ewf

Include ewf library

ntfs

Include the ability to read NTFS filesystems

reiserfs

Include reiserfs reading ability

sudo

Enable sudo helper integration

app-admin/tripwire

ssl

Adds support for Secure Socket Layer connections

static

Builds the package statically

tools

Installs app-admin/mktwpol, providing scripts for the installation/setup of tripwire, including generating the tripwire policy file and maintenance of the tripwire database

app-admin/ulogd

json

Build JSON output plugin to save packets in JSON file format

nfacct

Build NFACCT input plugin to support traffic accounting via nfnetlink_acct

nfct

Build NFCT input plugin to support stateful flow-based logging via nfnetlink_conntrack

nflog

Build NFLOG input plugin to support stateless packet-based logging via nfnetlink_log

pcap

Build PCAP output plugin to save packets in libpcap file format

ulog

Build ULOG input plugin to support deprecated packet-based logging via ULOG target

app-admin/vault

webui

Enable the Web UI

app-admin/webalizer

xtended

Include the 404 extension

app-admin/webapp-config

portage

Propagate python_targets dependencies to sys-apps/portage

app-alternatives/awk

busybox

Symlink to sys-apps/busybox

gawk

Symlink to sys-apps/gawk

mawk

Symlink to sys-apps/mawk (warning: mawk is not fully POSIX-compliant)

nawk

Symlink to sys-apps/nawk

app-alternatives/bc

gh

Symlink to bc-gh from sci-calculators/bc-gh

gnu

Symlink to GNU bc (sys-devel/bc)

app-alternatives/bzip2

lbzip2

Symlink to app-arch/lbzip2.

pbzip2

Symlink to app-arch/pbzip2.

reference

Symlink to app-arch/bzip2.

app-alternatives/cpio

gnu

Symlink to GNU cpio (app-arch/cpio)

libarchive

Symlink to bsdcpio from app-arch/libarchive

app-alternatives/gzip

pigz

Symlink to app-arch/pigz.

reference

Symlink to app-arch/gzip.

app-alternatives/lex

flex

Symlink to sys-devel/flex.

reflex

Symlink to sys-devel/reflex.

app-alternatives/ninja

reference

Symlink to dev-build/ninja.

samurai

Symlink to dev-build/samurai.

app-alternatives/sh

bash

Symlink to app-shells/bash

busybox

Symlink to sys-apps/busybox

dash

Symlink to app-shells/dash

ksh

Symlink to app-shells/ksh

lksh

Symlink to lksh from app-shells/mksh

mksh

Symlink to mksh from app-shells/mksh

app-alternatives/tar

gnu

Symlink to GNU tar (app-arch/tar)

libarchive

Symlink to bsdtar from app-arch/libarchive

app-alternatives/yacc

bison

Symlink to app-alternatives/yacc.

byacc

Symlink to dev-util/byacc.

reference

Symlink to dev-util/yacc.

app-antivirus/clamav

clamapp

Build applications (clamscan, clamd, clamdscan, clamonacc (also has its own USE flag), sigtool, clambc, clamav-milter (also requires milter USE flag), clamdtop, clamsubmit, clamconf).

clamdtop

A Top like tool which shows what clamd is currently scanning amongst other things

clamonacc

Build the clamonacc on-access scanner

clamsubmit

A tool to submit false positives / negatives

experimental

Enable experimental features

libclamav-only

Bypass building of libfreshclam and the ClamAV CLI applications.

metadata-analysis-api

Enables collection of file property metadata using ClamAV API for analysis by ClamAV bytecode programs.

rar

RAR support

system-mspack

Use dev-libs/libmspack instead of the version bundled with ClamAV

xml

DMG and XAR support

app-antivirus/clamtk

kde

Install the Dolphin plugin.

nautilus

Install the Nautilus plugin.

nemo

Install the Nemo plugin.

thunar

Install the Thunar plugin.

app-arch/7zip

jwasm

Use dev-lang/jwasm to include optimized code (doesn't support AES)

rar

Enable support for non-free rar decoder

uasm

Use dev-lang/uasm to include optimized code

app-arch/cabextract

extras

Install experimental extra tools: wince_info and wince_rename for examining and processing Windows CE installation cabinet header files; cabinfo for examining the structure of a cab file.

app-arch/createrepo_c

legacy

Build with support for legacy weakdeps and hashes (not recommended!)

app-arch/dpkg

libmd

Use app-crypt/libmd library for message digest functions

update-alternatives

Install update-alternatives

app-arch/dump

ermt

encrypted rmt support

uuid

Enable UUID support

app-arch/engrampa

caja

Enable engrampa to integrate with mate-base/caja by providing entries in its context menu

app-arch/file-roller

nautilus

Build contextual menu extension for gnome-base/nautilus.

app-arch/gzip

pic

disable optimized assembly code that is not PIC friendly

app-arch/innoextract

debug

Enable debug logging and the --debug command-line option

lzma

Enable support for extracting lzma-compressed installers using app-arch/xz-utils

app-arch/libarchive

blake2

Enable Blake2 hash support via app-crypt/libb2.

bzip2

Allow accessing bzip2-compressed archives through libbz2 (which comes with app-arch/bzip2). This only affects libarchive's native support: bsdtar will keep using bunzip2 as a filter if that's not built-in.

e2fsprogs

Use file flags from sys-fs/e2fsprogs headers instead of virtual/os-headers headers

nettle

Use dev-libs/nettle as crypto backend

app-arch/libdeflate

test

Build the test programs (requires sys-libs/zlib)

utils

Build the libdeflate-gzip program

app-arch/lrzip-next

largefile

Enables support for large files

year2038

Enables support for 64-bit 'time_t' (sets D_TIME_BITS=64; glibc only)

app-arch/p7zip

natspec

Use dev-libs/libnatspec to correctly decode non-ascii file names archived in Windows.

rar

Enable support for non-free rar decoder

app-arch/rar

all-sfx

Install all SFX (Self-Extracting) files rather than just the native format (allows creation of Windows EXEs on Linux ELF systems)

app-arch/rpm

sequoia

Use app-crypt/rpm-sequoia instead of the deprecated internal parser

app-arch/tar

minimal

just install `tar`

app-arch/unzip

natspec

Use dev-libs/libnatspec to correctly decode non-ascii file names archived in Windows.

app-arch/wimlib

fuse

Use fuse libraries

iso

Install app-cdr/cdrtools in order to prepare iso images

ntfs

Use libntfs-3g library from sys-fs/ntfs3g

yasm

Use yasm assembler instead of nasm

app-arch/xz-utils

extra-filters

Build additional filters that are not used in any of the default xz presets. This includes delta and BCJ coders, additional match finders and SHA256 checks.

pgo

Optimize the build using Profile Guided Optimization (PGO)

app-arch/zip

natspec

Use dev-libs/libnatspec to correctly decode non-ascii file names archived in Windows.

app-backup/amanda

ndmp

Support for the NDMP protocol

s3

Support for backing up to the Amazon S3 system

xfs

Support for backing up raw XFS filesystems using xfsdump

app-backup/backup-manager

s3

Support for backing up to the Amazon S3 system

app-backup/bacula

bacula-clientonly

Disable DB support, and just build a client

bacula-nodir

Disable building of director

bacula-nosd

Disable building of storage daemon

batch-insert

Enable batch insert into data base

ipv6

Support IPV6 protocol"

logwatch

Install support files for logwatch

app-backup/bareos

ceph

Enable sys-cluster/ceph support

clientonly

Only install file-daemon (client)

director

Install director

glusterfs

Enable sys-cluster/glusterfs storage backend

lmdb

enable build of dev-db/lmdb support for faster accurate backup

logwatch

Install support files for sys-apps/logwatch

ndmp

Enable support for NDMP (Network Data Management Protocol)

scsi-crypto

Enable low level SCSI crypto support

storage-daemon

Install storage daemon (bareos-sd)

vmware

Enable bareos-fd VMware plugin

app-backup/borgmatic

apprise

Allow backup monitoring to send notification to a wide variety of services, using dev-python/apprise

app-backup/btrbk

lsbtr

Enable the lsbtr command-line tool

mbuffer

Use sys-block/mbuffer to enable progress bar and buffering/limiting functionality

app-backup/dar

argon2

Enable password hashing algorithm from app-crypt/argon2

dar32

Enables --enable-mode=32 option, which replace infinite by 32 bit integers

dar64

Enables --enable-mode=64 option, which replace infinite by 64 bit integers

gcrypt

Enables strong encryption support

gpg

Enables usage of asymmetric encryption algorithms

rsync

Enables linking with net-libs/librsync for delta compression support

app-backup/duplicity

s3

Support for backing up to the Amazon S3 system

app-backup/rear

udev

Have ReaR start backup when attaching your USB drive.

app-backup/snapper

lvm

Enable LVM thinprovisioned snapshots support sys-fs/lvm2

xattr

Add support for getting and setting POSIX extended attributes, through sys-apps/attr.

app-backup/tsm

tsm-cit

IBM Tivoli Common Inventory Technology

tsm-hw

Difference snapshot support for NetApp and N-Series file servers

vmware

Install vmware data protection support

app-benchmarks/filebench

auto-completion

Enable command-line autocompletion using dev-libs/libtecla

app-benchmarks/httperf

idleconn

Build with the idleconn program

app-benchmarks/ioping

netdata

Add support for netdata

app-benchmarks/ramspeed

pic

Force shared libraries to be built as PIC (this is slower)

app-benchmarks/stress-ng

keyutils

Stress test the kernel's key generation facilities via sys-apps/keyutils

app-benchmarks/sysbench

aio

Add support for AIO.

attachsql

Add support for AttachSQL.

drizzle

Add support for Drizzles.

largefile

Add support for large files.

app-cdr/brasero

libburn

Enable dev-libs/libburn backend

nautilus

Build the gnome-base/nautilus extension

playlist

Enable support for playlists through dev-libs/totem-pl-parser

tracker

Enable audio playlist search using the app-misc/tracker indexer

app-cdr/cdemu

cdemu-daemon

Pull app-cdr/cdemu-daemon dependency, useful in chroot environment (bug #315491). Do not disable until you know what you are doing.

app-cdr/dvdisaster

debug

Enable memory debugging.

app-cdr/gaffitter

scripts

Install additional gaffitter scripts for external programs

app-cdr/mirage2iso

pinentry

Support app-crypt/pinentry password input backend.

app-containers/apptainer

network

Install network plug-ins

suid

Install SUID helper binary

app-containers/buildah

btrfs

Enables dependencies for the "btrfs" graph driver, including necessary kernel flags.

app-containers/containerd

btrfs

Support for BTRFS snapshot driver

cri

Support for Kubernetes CRI

device-mapper

Support for device mapper snapshot driver

app-containers/cri-o

btrfs

Enables dependencies for the "btrfs" graph driver, including necessary kernel flags.

device-mapper

Enables dependencies for the "devicemapper" graph driver, including necessary kernel flags.

app-containers/crun

bpf

Enable in Kernel, eBPF (enhanced Berkley Packet Filter) support for managing device controllers.

criu

Enable CRIU based checkpoint/restore support

app-containers/docker

btrfs

Enables dependencies for the "btrfs" graph driver, including necessary kernel flags.

container-init

Makes the a staticly-linked init system tini available inside a container.

overlay

Enables dependencies for the "overlay" graph driver, including necessary kernel flags.

overlay2

Enables dependencies for the "overlay2" graph driver, including necessary kernel flags.

app-containers/docker-credential-helpers

pass

Build pass helper for the pass utility.

app-containers/incus

fuidshift

Install the fuidshift binary - currently conflicts with app-containers/lxd

app-containers/lxc

io-uring

Enable io_uring support, and use io_uring instead of epoll

tools

Build and install additional command line tools

app-containers/nerdctl

rootless

Enables dependencies for running in rootless mode.

app-containers/podman

btrfs

Enables btrfs support (graph driver) in Podman

cgroup-hybrid

Use legacy (hybrid) cgroups instead of modern (unified) cgroups

fuse

Enables fuse dependencies (fuse-overlayfs is especially useful for rootless mode).

init

Enables catatonit dependency required for podman run --init.

rootless

Enables dependencies for running in rootless mode.

wrapper

Install wrapper which lets use podman for command `docker`

app-containers/runc

kmem

Enable Kernel Memory Accounting.

app-containers/skopeo

btrfs

Enables dependencies for the "btrfs" graph driver.

device-mapper

Compiles with libdevmapper

rootless

Compiles with libsubid

app-containers/snapd

forced-devmode

Automatically disable application confinement if feature detection fails.

app-crypt/aespipe

cpu_flags_x86_padlock

Use VIA padlock instructions, detected at run time, code still works on non-padlock processors

app-crypt/badkeys

dkim

Enable dkim scan mode via dev-python/dnspython.

ssh

Enable ssh scan mode via dev-python/paramiko.

app-crypt/ccid

twinserial

Enable twinserial reader

app-crypt/codecrypt

cryptopp

Build algorithms that need Crypto++ support dev-libs/crypto++

app-crypt/dehydrated

cron

Install cron job to sign/renew non-existent/changed/expiring certificates

app-crypt/eid-mw

dialogs

Enable "askaccess" dialog box, by using x11-libs/gtk+

gtk

All dialogs are available, by using x11-libs/gtk+

p11-kit

Support for app-crypt/p11-kit.

app-crypt/ekeyd

minimal

Only install the ekey-egd-linux service rather than the full ekeyd package.

munin

Install a plugin for net-analyzer/munin to graph statistical data from ekeyd.

usb

Build the libusb-based userland daemon for accessing the EntropyKey (alternative to the CDC USB driver). It is suggested to use this option by default, as the CDC driver in the kernel often seems to be fragile (or the gadget implementation on the EntropyKey is too buggy), and can cause various problems.

app-crypt/gnupg

smartcard

Build scdaemon software. Enables usage of OpenPGP cards. For other type of smartcards, try app-crypt/gnupg-pkcs11-scd. Bring in dev-libs/libusb as a dependency; enable scdaemon.

tofu

Enable support for Trust on First use trust model; requires dev-db/sqlite.

tools

Install extra tools (including gpgsplit and gpg-zip).

tpm

Enable TPM support via app-crypt/tpm2-tss and build tpm2d.

usb

Build direct CCID access for scdaemon; requires dev-libs/libusb.

user-socket

try a socket directory which is not removed by init manager at session end

wks-server

Install the wks-server

app-crypt/gnupg-pkcs11-scd

proxy

Build the gnupg-pkcs11-scd-prox

app-crypt/gpgme

common-lisp

Install common-lisp files

app-crypt/hashcat

brain

Enable the hashcat brain

app-crypt/heimdal

hdb-ldap

Adds support for LDAP as a database backend

lmdb

Add support for using dev-db/lmdb for lookup tables

otp

Adds support for one-time passwords

app-crypt/ima-evm-utils

tpm

Enable TPM support

app-crypt/johntheripper-jumbo

opencl

Build with opencl/GPU cracking support

pcap

Build with pcap support

app-crypt/keybase

fuse

Enable app-crypt/kbfs support

app-crypt/kstart

afs

Enables afs support which means you can acquire an afs token and set PAGs. It's recommended to set this USE if you need authenticated access to an AFS cell for your daemon/app.

app-crypt/libb2

native-cflags

Use CFLAGS as determined by configure script. These flags will enable all CPU specific features it find available, to further optimise the implementation. This discards any existing CFLAGS set in make.conf or similar.

app-crypt/libsecret

tpm

Enable Trusted Platform Module support via app-crypt/tpm2-tss

app-crypt/libu2f-host

systemd

Use user ACLs rather than plugdev group to give user access to the HIDRAW device.

app-crypt/mit-krb5

doc

Creates and installs the API and implementation documentation. This is only useful if you want to develop software which depends on kerberos

keyutils

Enable for the keyring ccache using keyutils

lmdb

Add support for using dev-db/lmdb for lookup tables

openldap

Enable support for ldap as a database backend

pkinit

Enable pkinit support for the initial ticket

app-crypt/mkp224o

pcre

Search with a regex instead of prefix/suffix matching

app-crypt/ophcrack

tables

Require the additional tables used to carry out cracking (app-crypt/ophcrack-tables)

app-crypt/ophcrack-tables

vistafree

Installs the free Vista ophcrack tables

xpfast

Installs the fast XP ophcrack tables

xpsmall

Installs the small free XP ophcrack tables

app-crypt/pinentry

efl

Build dev-libs/efl based pinentry

app-crypt/qca

botan

Enable botan plugin

gcrypt

Enable gcrypt plugin

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

app-crypt/rpm-sequoia

nettle

Use dev-libs/nettle as a crypto backend

openssl

Use dev-libs/openssl as a crypto backend

app-crypt/seahorse

ldap

Enable seahorse to manipulate GPG keys on a LDAP server.

app-crypt/swtpm

fuse

Support sys-fs/fuse based /dev/tpm interface

app-crypt/tpm2-pkcs11

fapi

Enable feature API backend

app-crypt/tpm2-tools

fapi

Enable feature API tools

app-crypt/tpm2-totp

plymouth

Add sys-boot/plymouth support

app-crypt/tpm2-tss

fapi

Enable feature API (requires openssl as crypto backend)

mbedtls

Use net-libs/mbedtls as crypto engine

openssl

Use dev-libs/openssl as crypto engine

policy

Enable policy library (requires openssl as crypto backend)

app-crypt/tpm-tools

pkcs11

Build Token data management utilities based on OpenCryptoki's (dev-libs/opencryptoki) PKCS#11 implementation.

app-crypt/zulucrypt

kwallet

Enable encrypted storage of passwords with kde-frameworks/kwallet

udev

Whether udev will be consulted when deciding if a volume is system or not

app-dicts/aspell-be

classic

Support classic spelling by default

app-dicts/gwaei

hunspell

Enable app-text/hunspell spellchecking and morphological analysis

mecab

Enable app-text/mecab support

app-dicts/myspell-pt

preao

Use the pre ortographic agreement version of the dictionary

app-doc/csound-manual

html

Install HTML documentation

app-doc/devmanual

offline

Use alternative minimal stylesheet instead of Tyrian theme

app-doc/kicad-doc

html

Generate documentation in HTML format

pdf

Generate documentation in PDF format

app-doc/linuxfromscratch

htmlsingle

Install all-on-one-page HTML version.

app-doc/pms

html

Generate and install PMS as .html as well

twoside

Enable two-sided layout suitable for printing

app-doc/pms-bin

html

Install PMS as .html as well

app-doc/tldp-howto

html

Install multi-chapter HTML docs

htmlsingle

Install all-on-one-page HTML docs

pdf

Install pdf docs

text

Install plain-text docs

app-editors/bluefish

gucharmap

Enable gucharmap dictionary plugin

spell

Enable spell checking capabilities via enchant library

app-editors/emacs

athena

Enable the MIT Athena widget set (x11-libs/libXaw)

dynamic-loading

Enable loading of dynamic libraries (modules) at runtime

games

Support shared score files for games

gfile

Use gfile (dev-libs/glib) for file notification

gmp

Use the GNU multiple precision arithmetic library (dev-libs/gmp) instead of the bundled mini-gmp subset

gsettings

Use gsettings (dev-libs/glib) to read the system font name

gzip-el

Compress bundled Emacs Lisp source

harfbuzz

Use media-libs/harfbuzz as text shaping engine

imagemagick

Use media-gfx/imagemagick for image processing

jit

Compile with Emacs Lisp native compiler support via libgccjit

json

Compile with native JSON support using dev-libs/jansson

libxml2

Use dev-libs/libxml2 to parse XML instead of the internal Lisp implementations

mailutils

Retrieve e-mail using net-mail/mailutils instead of the internal movemail substitute

source

Install C source files and make them available for find-function

threads

Add elisp threading support

toolkit-scroll-bars

Use the selected toolkit's scrollbars in preference to Emacs' own scrollbars

tree-sitter

Support the dev-libs/tree-sitter parsing library

wide-int

Prefer wide Emacs integers (typically 62-bit). This option has an effect only on architectures where "long" and "long long" types have different size.

app-editors/fe

sendmail

Send mail after editor abend

app-editors/featherpad

X

Link application against X11 libraries which adds support for virtual desktop awareness and tab DND

app-editors/gedit-plugins

charmap

Insert special characters just by clicking on them

git

Shows document changes related to git's HEAD

terminal

Embed a terminal in the bottom pane

app-editors/gnome-latex

latexmk

Install dev-tex/latexmk (used by default for the build tools)

rubber

Install dev-tex/rubber (can be used for the build tools)

app-editors/gvim

crypt

Use dev-libs/libsodium for crypto support

cscope

Enable cscope interface

netbeans

Include netbeans external editor integration support

racket

Enable support for Scheme using dev-scheme/racket

app-editors/helix

grammar

Build and install grammar language files

app-editors/jasspa-microemacs

nanoemacs

Build NanoEmacs instead of MicroEmacs

app-editors/joe

xterm

Enable full xterm clipboard support

app-editors/leafpad

emacs

Enable Emacs key theme

app-editors/mousepad

shortcuts

Build the "shortcuts" plugin

app-editors/nano

debug

Enable debug messages and assert warnings. Note that these will all be sent straight to stderr rather than some logging facility.

justify

Enable justify/unjustify functions for text formatting.

magic

Add magic file support (sys-apps/file) to automatically detect appropriate syntax highlighting

minimal

Disable all fancy features, including ones that otherwise have a dedicated USE flag (such as spelling).

app-editors/neovim

nvimpager

Install nvimpager symlink to less.sh macro

app-editors/okteta

designer

Build plugins for dev-qt/designer

app-editors/qhexedit2

gui

Install Qt5 hex editor

app-editors/tea

aspell

Enable spellchecking using app-text/aspell

app-editors/vim

crypt

Use dev-libs/libsodium for crypto support

cscope

Enable cscope interface

racket

Enable support for Scheme using dev-scheme/racket

terminal

Enable terminal emulation support

vim-pager

Install vimpager and vimmanpager links

X

Link console vim against X11 libraries to enable title and clipboard features in xterm

app-editors/vis

tre

more memory efficient regex search using dev-libs/tre

app-editors/vscode

egl

Use EGL platform, enables smooth rending in high refresh rate monitors on X11/Xwayland

wayland

Run in wayland mode under wayland sessions, xwayland otherwise. This flag doesn't affect x11 sessions.

app-editors/vscodium

egl

Use EGL platform, enables smooth rending in high refresh rate monitors on X11/Xwayland

wayland

Run in wayland mode under wayland sessions, xwayland otherwise. This flag doesn't affect x11 sessions.

app-editors/xemacs

athena

Chooses the MIT Athena widget set

bignum

Support for OpenSSL bignum implementation

dnd

Enables support for the x11-libs/dnd drag-n-drop library

eolconv

Support detection and translation of newline conventions

mule

Add multi-language support to XEmacs

pop

Support POP for mail retrieval

xim

Enable X11 XiM input method

app-emacs/auctex

preview-latex

Use bundled preview-latex

app-emacs/bbdb

tex

Install plain TeX support files

vm

Add support for app-emacs/vm

wanderlust

Add support for app-emacs/wanderlust

app-emacs/calfw

howm

Add support for the app-emacs/howm note-taking tool

app-emacs/elscreen

wanderlust

Include support for app-emacs/wanderlust

app-emacs/emacs-common

games

Support shared score files for games

gsettings

Install schema file for gsettings (dev-libs/glib)

app-emacs/emacs-w3m

gzip-el

Compress bundled Emacs Lisp source

app-emacs/flim

oauth2

Support OAuth2 authentication (app-emacs/oauth2)

app-emacs/gap-mode

completion

Install GAP backend for app-emacs/company-mode to "complete anything."

lint

Support automatically linting GAP code via app-emacs/flycheck and dev-gap/gaplint.

app-emacs/mu-cite

bbdb

Include support for app-emacs/bbdb

app-emacs/org-mode

odt-schema

Install non-free schema files for OpenDocument Text exporter

app-emacs/remember

bbdb

Include support for app-emacs/bbdb

planner

Include support for app-emacs/planner

app-emacs/slime

xref

Install xref.lisp cross-referencing tool

app-emacs/sly

xref

Install xref.lisp cross-referencing tool

app-emacs/vm

bbdb

Include support for app-emacs/bbdb

app-emacs/wanderlust

bbdb

Include support for app-emacs/bbdb

app-emacs/wikipedia-mode

outline-magic

Enable support for outline-mode extensions (app-emacs/outline-magic)

app-emulation/86Box

experimental

Enable hardware from devbranch, which may be unstable or unusable.

fluidsynth

Enable MIDI support through media-sound/fluidsynth.

munt

Enable MIDI MT-32 support through media-libs/munt-mt32emu.

new-dynarec

Enable new dynamic recompiler from PCem 15, which should provide an even better emulation speed.

app-emulation/aranym

clipboard

Enable bidirectional clipboard transfer between the host and FreeMiNT

jit

Build Just-In-Time compiler variant with increased performance

lilo

Enable support for directly booting kernels such as Linux

osmesa

Allow images to be rendered in memory using the host CPU

pmmu

Build full PMMU variant, required for running mainline Linux

standard

Build standard (no JIT or PMMU) variant

app-emulation/bochs

3dnow

Enable support for emulating 3DNow! instructions (incomplete)

avx

Enable support for emulating Advanced Vector Extensions (AVX)

debugger

Enable debugger (slows down emulation)

gdb

Enable support for the remote GDB stub

x86-64

Enable support for emulation of 64-bit CPUs

app-emulation/crossover-bin

capi

Enable ISDN support via CAPI

osmesa

Add support for OpenGL in bitmaps using libOSMesa

pcap

Support packet capture software (e.g. wireshark)

app-emulation/dosemu

fluidsynth

use media-sound/fluidsynth for MIDI emulation

app-emulation/dxvk

crossdev-mingw

Use sys-devel/crossdev for the toolchain rather than dev-util/mingw64-toolchain (requires manual setting up)

d3d10

Enable support for DirectX 10 (d3d10.dll)

d3d11

Enable support for DirectX 11 (d3d11.dll)

d3d8

Enable support for DirectX 8 (d3d8.dll)

d3d9

Enable support for DirectX 9 (d3d9.dll)

dxgi

Enable support for the DirectX Graphics Infrastructure (dxgi.dll)

app-emulation/faudio

dumpvoices

FAudio dumps buffer data to individual files with RIFF/XWMA headers, usable with players like ffplay/testxwma.

app-emulation/fs-uae

fmv

Enable support for CD32 FMV (full motion video)

glew

Enable support for The OpenGL Extension Wrangler Library (media-libs/glew)

app-emulation/fs-uae-launcher

lha

Enable LHA archive support

app-emulation/fuse

backend-fbcon

Use framebuffer rendering backend

backend-gtk3

Use Gtk+ rendering backend

backend-sdl

Use SDL rendering backend

backend-svga

Use svgalib rendering backend

backend-X

Use X11 rendering backend

memlimit

Add compile-time memory usage limiting

app-emulation/fuse-utils

gcrypt

Use dev-libs/libgcrypt for low-level crypto of some features, including logfiles.

app-emulation/grub-xen-host

pvh

Build an additional grub bin for pvh.

app-emulation/hercules-sdl

object-rexx

Enable REXX support via Open Object Rexx (dev-lang/oorexx)

regina-rexx

Enable REXX support via Regina Rexx (dev-lang/regina-rexx)

app-emulation/libcacard

passthrough

Enable smartcard passthrough support via sys-apps/pcsc-lite

app-emulation/libguestfs

erlang

Build Erlang bindings

fuse

Enable image mount support via sys-fs/fuse

inspect-icons

Use media-gfx/icoutils for accessing/inspecting icon file within images

libvirt

Use app-emulation/libvirt to manipulate VMs

systemtap

Use dev-debug/systemtap to inspect VM via "probes"

app-emulation/libspectrum

gcrypt

Use dev-libs/libgcrypt for low-level crypto of some features, including logfiles.

app-emulation/libvirt

dtrace

Enable dtrace support via dev-debug/systemtap

firewalld

DBus interface to iptables/ebtables allowing for better runtime management of your firewall.

fuse

Allow LXC to use sys-fs/fuse for mountpoints

glusterfs

Enable GlusterFS support via sys-cluster/glusterfs

iscsi

Allow using an iSCSI remote storage server as pool for disk image storage

iscsi-direct

Allow using libiscsi for iSCSI storage pool backend

libssh

Use net-libs/libssh to communicate with remote libvirtd hosts, for example: qemu+libssh://server/system

libssh2

Use net-libs/libssh2 to communicate with remote libvirtd hosts, for example: qemu+libssh2://server/system

libvirtd

Builds the libvirtd daemon as well as the client utilities instead of just the client utilities

lvm

Allow using the Logical Volume Manager (sys-fs/lvm2) as pool for disk image storage

lxc

Support management of Linux Containers virtualisation (app-containers/lxc)

nbd

Allow using sys-block/nbdkit to access network disks

nfs

Allow using Network File System mounts as pool for disk image storage

numa

Use NUMA for memory segmenting via sys-process/numactl and sys-process/numad

openvz

Support management of OpenVZ virtualisation (openvz-sources)

parted

Allow using real disk partitions as pool for disk image storage, using sys-block/parted to create, resize and delete them.

pcap

Support auto learning IP addreses for routing

qemu

Support management of QEMU virtualisation (app-emulation/qemu)

rbd

Enable rados block device support via sys-cluster/ceph

virtiofsd

Drag in virtiofsd dependency app-emulation/virtiofsd

virt-network

Enable virtual networking (NAT) support for guests. Includes all the dependencies for NATed network mode. Effectively any network setup that relies on libvirt to setup and configure network interfaces on your host. This can include bridged and routed networks ONLY if you are allowing libvirt to create and manage the underlying devices for you. In some cases this requires enabling the 'netcf' USE flag (currently unavailable).

virtualbox

Support management of VirtualBox virtualisation (app-emulation/virtualbox)

wireshark-plugins

Build the net-analyzer/wireshark plugin for the Libvirt RPC protocol

xen

Support management of Xen virtualisation (app-emulation/xen)

zfs

Enable ZFS backend storage sys-fs/zfs

app-emulation/nemu

network-map

Adds possibility of exporting network map to SVG

ovf

Adds support for OVA/OVF import

remote-api

Adds API for remote control

spice

Adds Spice protocol support

vnc-client

Adds support for external VNC client

app-emulation/open-vm-tools

deploypkg

Build deploypkg plugin

dnet

Enable support for nicinfo

doc

Generate API documentation

fuse

Enable vmblock-fuse/vmhgfs-fuse

gtkmm

Compile with Gtkmm and sigc++ (Recommended)

multimon

Enable multimon (Requires X)

resolutionkms

Build the linux/unix resolutionkms module

vgauth

Build vgauth

app-emulation/pcem

networking

Enable support for emulation of network cards.

app-emulation/punes

cg

Add support for Nvidia CG Toolkit

app-emulation/q4wine

ico

Enable ico support via media-gfx/icoutils

iso

Support unprivileged mounting of ISO9660 images via sys-fs/fuseiso

wineappdb

Enable Wine AppDB browser support

app-emulation/qemu

accessibility

Adds support for braille displays using brltty

aio

Enables support for Linux's Async IO

alsa

Enable alsa output for sound emulation

bpf

Enable eBPF support for RSS implementation.

capstone

Enable disassembly support with dev-libs/capstone

curl

Support ISOs / -cdrom directives via HTTP or HTTPS.

fdt

Enables firmware device tree support

fuse

Enables FUSE block device export

glusterfs

Enables GlusterFS cluster fileystem via sys-cluster/glusterfs

gnutls

Enable TLS support for the VNC console server. For 1.4 and newer this also enables WebSocket support. For 2.0 through 2.3 also enables disk quorum support.

io-uring

Enable efficient I/O via sys-libs/liburing.

iscsi

Enable direct iSCSI support via net-libs/libiscsi instead of indirectly via the Linux block layer that sys-block/open-iscsi does.

jemalloc

Enable jemalloc allocator support

jpeg

Enable jpeg image support for the VNC console server

keyutils

Support Linux keyrings via sys-apps/keyutils

multipath

Enable multipath persistent reservation passthrough via sys-fs/multipath-tools.

ncurses

Enable the ncurses-based console

nfs

Enable NFS support

numa

Enable NUMA support

pin-upstream-blobs

Pin the versions of BIOS firmware to the version included in the upstream release. This is needed to sanely support migration/suspend/resume/snapshotting/etc... of instances. When the blobs are different, random corruption/bugs/crashes/etc... may be observed.

pipewire

Enable pipewire output for sound emulation

plugins

Enable qemu plugin API via shared library loading.

png

Enable png image support for the VNC console server

pulseaudio

Enable pulseaudio output for sound emulation

rbd

Enable rados block device backend support, see https://docs.ceph.com/en/mimic/rbd/qemu-rbd/

sdl

Enable the SDL-based console

sdl-image

SDL Image support for icons

slirp

Enable TCP/IP in hypervisor via net-libs/libslirp

spice

Enable Spice protocol support via app-emulation/spice

ssh

Enable SSH based block device support via net-libs/libssh2

static

Build the User and Software MMU (system) targets as well as tools as static binaries

static-user

Build the User targets as static binaries

systemtap

Enable SystemTap/DTrace tracing

usb

Enable USB passthrough via dev-libs/libusb

usbredir

Use sys-apps/usbredir to redirect USB devices to another machine over TCP

vde

Enable VDE-based networking

vhost-net

Enable accelerated networking using vhost-net, see https://www.linux-kvm.org/page/VhostNet

virgl

Enable experimental Virgil 3d (virtual software GPU)

virtfs

Enable VirtFS via virtio-9p-pci / fsdev. See https://wiki.qemu.org/Documentation/9psetup

vte

Enable terminal support (x11-libs/vte) in the GTK+ interface

xattr

Add support for getting and setting POSIX extended attributes, through sys-apps/attr. Requisite for the virtfs backend.

xdp

Enable support for XDP through net-libs/xdp-tools

xen

Enables support for Xen backends

app-emulation/ski

debug

enable extra binary emulation debugging via sys-libs/binutils-libs

app-emulation/spice

smartcard

Enable smartcard remoting using app-emulation/libcacard

app-emulation/uade

fuse

Enable sys-fs/fuse uadefs frontend for on-the-fly WAV conversion

app-emulation/vice

ethernet

Enable ethernet emulation

headless

Include the headless variant of the emulator

mpg123

Enable mp3@64 cartridge support

parport

Enable parallel port SID support

pci

Enable PCI device discovery using sys-apps/pciutils

app-emulation/virt-manager

policykit

Enables sys-auth/polkit authentication support, required when using app-emulation/libvirt with PolicyKit authentication

sasl

Depend on the proper libraries needed to connect to SASL-enabled libvirtd instances (e.g. Kerberos-protected instances).

app-emulation/virtualbox

dtrace

Install dtrace Extension Pack.

headless

Build without any graphic frontend.

lvm

Build VBoxVolInfo that needs devicemapper from sys-fs/lvm2.

pax-kernel

Apply patch needed for pax enabled kernels.

sdk

Enable building of SDK.

udev

Controls installation of special USB udev rules.

vboxwebsrv

Build and install the VirtualBox webservice.

vde

Support for VDE networking via net-misc/vde.

vmmraw

Enable 32-bit support on a 64-bit kernel.

app-emulation/virtualbox-kvm

dtrace

Install dtrace Extension Pack

hardened

Enable hardening and install binaries SUID

lvm

Build VBoxVolInfo that needs devicemapper from sys-fs/lvm2.

sdk

Enable building of SDK

udev

Controls installation of special USB udev rules.

vboxwebsrv

Build and install the VirtualBox webservice

vde

Support for VDE networking via net-misc/vde

vmmraw

Enable 32-bit support on a 64-bit kernel.

app-emulation/virt-viewer

libvirt

Support connecting to virtual machines managed by libvirt.

spice

Support connecting to SPICE-enabled virtual machines.

vnc

Support connecting to VNC-enabled virtual machines.

vte

Enable terminal support (x11-libs/vte) in the GTK+ interface

app-emulation/virt-what

dmi

Use sys-apps/dmidecode to read firmware data

app-emulation/vkd3d

spirv-tools

Enable SPIRV shader debugging support using dev-util/spirv-tools

app-emulation/vkd3d-proton

crossdev-mingw

Use sys-devel/crossdev for the toolchain rather than dev-util/mingw64-toolchain (requires manual setting up)

extras

Install extra tools and demos in /usr/lib/vkd3d-proton

app-emulation/wine-gecko

shared

Install pre-unpacked files which do not need to be copied into the Wine prefix

app-emulation/wine-mono

shared

Install pre-unpacked files which do not need to be copied into the Wine prefix (note that this requires the default top-level Z: drive to be kept for out-of-prefix files to be readable)

app-emulation/wine-proton

crossdev-mingw

Use sys-devel/crossdev for the toolchain rather than dev-util/mingw64-toolchain (requires manual setting up)

gecko

Enable mshtml support using app-emulation/wine-gecko

mono

Enable .NET support using app-emulation/wine-mono

osmesa

Enable off-screen rendering (OpenGL in bitmaps) support

perl

Install helpers that require perl (winedump/winemaker)

sdl

Enable gamepad support using media-libs/libsdl2

vkd3d

Enable DirectX 12 support using app-emulation/vkd3d

wow64

Enable running 32bit applications without 32bit ELF multilib by mapping to 64bit calls (experimental, *may* have worse/unusable OpenGL performance or other issues compared to USE=abi_x86_32, also lacks 16bit support) -- still need dev-util/mingw64-toolchain with abi_x86_32 which itself does not need multilib

app-emulation/wine-staging

capi

Enable ISDN support using net-libs/libcapi

crossdev-mingw

Use sys-devel/crossdev for the toolchain rather than dev-util/mingw64-toolchain (requires manual setting up)

dos

Pull in games-emulation/dosbox to run DOS applications

gecko

Enable mshtml support using app-emulation/wine-gecko

mingw

Build PE files using a MinGW toolchain for better compatibility

mono

Enable .NET support using app-emulation/wine-mono

netapi

Enable support for configuring remote shares using net-fs/samba

osmesa

Enable off-screen rendering (OpenGL in bitmaps) support

pcap

Support packet capture software (e.g. wireshark)

perl

Install helpers that require perl (winedump/winemaker)

samba

Pull in net-fs/samba with winbind for NTLM auth support

sdl

Enable gamepad support using media-libs/libsdl2

wow64

app-emulation/winetricks

rar

Pull in app-arch/unrar for extraction of rar-compressed game files

app-emulation/wine-vanilla

capi

Enable ISDN support using net-libs/libcapi

crossdev-mingw

Use sys-devel/crossdev for the toolchain rather than dev-util/mingw64-toolchain (requires manual setting up)

dos

Pull in games-emulation/dosbox to run DOS applications

gecko

Enable mshtml support using app-emulation/wine-gecko

mingw

Build PE files using a MinGW toolchain for better compatibility

mono

Enable .NET support using app-emulation/wine-mono

netapi

Enable support for configuring remote shares using net-fs/samba

osmesa

Enable off-screen rendering (OpenGL in bitmaps) support

pcap

Support packet capture software (e.g. wireshark)

perl

Install helpers that require perl (winedump/winemaker)

samba

Pull in net-fs/samba with winbind for NTLM auth support

sdl

Enable gamepad support using media-libs/libsdl2

vkd3d

Enable DirectX 12 support using app-emulation/vkd3d

wow64

app-emulation/x48

readline

Enables support for libreadline

app-emulation/xe-guest-utilities

xenstore

Use xenstore binaries bundled by Citrix instead of building app-emulation/xen-tools

app-emulation/xen

boot-symlinks

Symlink xen.gz variants in /boot, disable on fat filesystems

flask

Enable the Flask XSM module from NSA

uefi

Adds UEFI boot support, requires LDFLAG -melf_x86_64 for amd64

app-emulation/xen-tools

api

Build the C libxenapi bindings

hvm

Enable support for hardware based virtualization (VT-x,AMD-v)

ipxe

Enable ipxe support

ovmf

Enable support to boot UEFI guest vm, needed by hvm

pygrub

Install the pygrub boot loader

qemu

Enable IOEMU support via the use of qemu-dm

qemu-traditional

Build the old qemu traditional device model (useful only if you cannot change to the new device model e.g. Windows VMs)

rombios

Enable rombios support, needed by ipxe

screen

Enable support for running domain U console in an app-misc/screen session

system-ipxe

Using sys-firmware/ipxe instead of the bundled one

system-qemu

Using app-emulation/qemu instead of the bundled one

system-seabios

Using sys-firmware/seabios instead of the bundled one

app-emulation/xtrs

ls-dos

Install LS-DOS disk images for Model 4P

app-eselect/eselect-php

fpm

Enable the FastCGI Process Manager SAPI

app-eselect/eselect-wine

xdg

Set XDG_DATA_DIRS to use the selected wine.desktop, allows e.g. 'xdg-open my.exe' for file managers

app-forensics/afflib

fuse

Enable extra fuse thingies

qemu

Enable qemu stuff

s3

Enable support for Amazon S3

app-forensics/aide

curl

Use curl for http,https and ftp backends

e2fs

Enable support for checking file attributes on ext2/ext3/ext4 filesystems

app-forensics/chkrootkit

cron

Install cron script for weekly rootkit scans

app-forensics/honggfuzz

clang

Enable clang support (pull sys-libs/blocksruntime dependency).

app-forensics/lynis

cron

Install /etc/cron.* files

app-forensics/sleuthkit

aff

Enable extra aff formats

ewf

Enable libewf support

app-forensics/volatility3

crypt

support plugins that decrypt passwords, password hashes, etc.

disasm

support plugins that perform malware analysis and disassemble code

jsonschema

improve error messages regarding improperly configured ISF files

leechcore

support memory acquisition via leechcore

snappy

support AVMLs native compression format

yara

support YARA pattern matching engine

app-forensics/yara

cuckoo

Enable cockoo module

dex

Enable dex module

dotnet

Enable dotnet module

macho

Enable macho module

magic

Enable magic module

profiling

Enable rules profiling

python

Pulls in python binding via dev-python/yara-python

app-i18n/fcitx

autostart

Enable XDG-compatible autostart of Fcitx

emoji

Enable emoji loading for CLDR

enchant

Enable Enchant backend (using app-text/enchant) for spelling hinting

gtk2

Install input method module for GTK+ 2

gtk3

Install input method module for GTK+ 3

keyboard

Enable key event translation with XKB and build keyboard engine

opencc

Enable OpenCC engine (using app-i18n/opencc) for converter between Simplified Chinese and Traditional Chinese

pango

Enable support for x11-libs/pango

presage

Enable presage for word predication (not stable)

server

Build a fcitx as server, disable this option if you want to use fcitx as an embedded library

table

Install table input methods for Simplified Chinese

xkb

Enable support for XKB (required for fcitx-xkb, fcitx-xkbdbus, part of fcitx-keyboard)

app-i18n/fcitx-chinese-addons

cloudpinyin

Build cloud pinyin addon

data

Build data

gui

Enable GUI support (qt5 or qt6)

opencc

Enable support for conversion between Traditional and Simplified Chinese

qt5

Enable configure qt5

webengine

Enable built-in browser using dev-qt/qtwebengine

app-i18n/fcitx-configtool

config-qt

Enable fcitx5-config-qt

kcm

Enable KDE KCM support

test

Enable Test

app-i18n/fcitx-gtk

gtk2

Install input method module for GTK+ 2

gtk3

Enable support for GTK+3

gtk4

Enable support for GTK 4

onlyplugin

Build only plugin

snooper

Enable key snooper for gtk app

app-i18n/fcitx-libpinyin

dictionary-manager

Install dictionary manager

app-i18n/fcitx-lua

dlopen

Use dlopen to load lua library

app-i18n/fcitx-qt

onlyplugin

Build only plugin

qt6

Build support for QT6

staticplugin

Build plugin as static

app-i18n/fcitx-rime

configuration-tool

Install configuration tool

app-i18n/fcitx-unikey

macro-editor

Install macro editor

app-i18n/ibus

emoji

Enable support for Emoji

gtk2

Enable the GTK-2 input method module

gtk3

Enable the GTK-3 input method module

gtk4

Enable the GTK-4 input method module

unicode

Enable support for Unicode choice

app-i18n/ibus-handwrite

zinnia

Enable support for app-i18n/zinnia

app-i18n/ibus-libpinyin

boost

Compile against dev-libs/boost libraries

opencc

Enable support for app-i18n/opencc

app-i18n/ibus-pinyin

boost

Enable support for dev-libs/boost

app-i18n/im-chooser

xfce

Enable support for XFCE panel

app-i18n/imsettings

xfconf

Enable support for xfce-base/xfconf

app-i18n/libime

data

Build data

app-i18n/librime

debug

Enable debugging (including logging of input of RIME input methods)

app-i18n/mozc

fcitx4

Enable support for app-i18n/fcitx 4

fcitx5

Enable support for app-i18n/fcitx 5

gui

Install graphical user interface tool (mozc_tool)

ibus

Enable support for app-i18n/ibus

renderer

Enable native candidate window

app-i18n/pyzy

boost

Enable support for dev-libs/boost

doc

Generate API documentation

opencc

Enable support for app-i18n/opencc

app-i18n/rime-data

extra

Install extra packages

app-i18n/scim

gtk3

Enable support for x11-libs/gtk+:3

app-i18n/scim-anthy

gtk3

Enable support for x11-libs/gtk+:3

kasumi

Use Anthy dictionary maintenance tool (app-dicts/kasumi)

app-i18n/tomoe

hyperestraier

Enable support for app-text/hyperestraier

app-i18n/uim

anthy

Enable support for app-i18n/anthy

eb

Enable support for dev-libs/eb

gtk2

Enable support for x11-libs/gtk+:2

skk

Enable support for app-i18n/skk-jisyo

app-laptop/hdapsd

libconfig

Require dev-libs/libconfig to allow the daemon to read a configuration file at startup

app-laptop/ibam

gkrellm

Enable building of app-admin/gkrellm module

app-laptop/laptop-mode-tools

apm

Add APM (Advanced Power Management) support

app-laptop/pbbuttonsd

ibam

Enable support for Intelligent Battery Monitoring

macbook

Enable support for the Macbook and Macbook Pro

app-laptop/thinkfan

atasmart

include libatasmart support to get disc temperature

nvidia

allow thinkfan to read GPU temperature from the proprietary nVidia driver

yaml

use YAML format for config file

app-laptop/tp_smapi

hdaps

Install a compatible HDAPS module

app-metrics/collectd

contrib

Install user-contributed files in the doc directory

filecaps

When set collectd daemon will have set required capabilities to run most plugins even if run as unprivileged user

java

Must be set (workaround for java-pkg-opt-2 eclass limitation) when you want java or genericjmx plugin

udev

Enable optional udev usage in disk plugin; Required for smart plugin

xfs

Enable optional capability to filter on XFS file system in df plugin; Requires XFS headers from sys-fs/xfsprogs

app-metrics/node_exporter

systemd

Enables systemd collector by default

app-metrics/prometheus-podman-exporter

btrfs

Collect metrics for btrfs filesystem

app-misc/anki

gui

Enable support for a graphical user interface. Disable for standalone sync server.

app-misc/blink1

mini-tool

Build and install command-line mini-tool blink1-mini-tool (normally used for embedded devices)

server

Build and install REST API server (currently hard-coded to TCP port 8080)

tool

Build and install command-line tool blink1-tool

app-misc/broot

X

X11 clipboard interaction

app-misc/byobu

screen

Use app-misc/screen as the default backend

app-misc/ca-certificates

cacert

Include root/class3 certs from CAcert (https://www.cacert.org/)

app-misc/carbon-c-relay

client

build and install sendmetric client utility

lz4

add support for LZ4 compressed transport

oniguruma

use dev-libs/oniguruma as regex implementation

pcre2

use dev-libs/libpcre2 as regex implementation

snappy

add support for Snappy compressed transport

app-misc/ddccontrol

pci

enable direct PCI memory access (the setuid ddcpci util)

app-misc/ddcutil

drm

Use x11-libs/libdrm for more verbose diagnostics.

usb-monitor

Adds support for monitors attached via USB.

user-permissions

Adds a udev rules to allow non-root users in the i2c group to access the /dev/i2c-* devices. If usb-monitor is selected, users will need to be added to the video group to access the USB monitor. Otherwise, only root will be able to use ddcutil.

app-misc/digitemp

ds2490

Build support for the ds2490 sensor

ds9097

Build support for the ds9097 sensor

ds9097u

Build support for the ds9097u sensor

app-misc/ebusd

contrib

Compile and install additional user contribued plugins.

knx

Enable support for connecting to KNX.

mqtt

Enable support for connecting to MQTT.

app-misc/fastfetch

chafa

Enables text/graphics renderer with media-gfx/chafa

ddcutil

Use app-misc/ddcutil to query monitor settings

drm

Enables support for X.org's x11-libs/libdrm

elf

Use libelf to extract strings from binaries

osmesa

Enables offscreen rendering support from media-libs/mesa

vulkan

Enables reading GPU via media-libs/vulkan-loader

xfce

Enables support for XFCE config

xrandr

Enables support for Xrandr

app-misc/FreeSSM

small-resolution

Build the app for small resolution screeens

app-misc/g810-led

hidapi

Use dev-libs/hidapi instead of virtual/libusb for talking to the device (advertised to be faster)

app-misc/geoclue

modemmanager

Enable geolocation through 3G or GPS enabled hardware through net-misc/modemmanager.

zeroconf

Enable retrieval of GPS location from Android devices with https://wiki.gnome.org/Apps/GeoclueShare

app-misc/gramps

geo

Enable rendering of geographical data using sci-geosciences/osm-gps-map

rcs

Adds support for family tree archives via dev-vcs/rcs

reports

All external software that is needed for graphical reports will be installed

app-misc/graphlcd-base

fontconfig

Add support for media-libs/fontconfig font names.

freetype

Add support for media-libs/freetype.

graphicsmagick

Add support for media-gfx/graphicsmagick.

imagemagick

Add support for media-gfx/imagemagick.

app-misc/irtrans-irserver

mono

Enable mono support

app-misc/jdupes

dedupe

Enable deduplication support

app-misc/jp

jpp

Install jpp which is an extended superset of the jp CLI for JMESPath

app-misc/jpipe

jpp-symlink

Install a jpp symlink that points to jpipe.

jp-symlink

Install a jp symlink that points to jpipe.

app-misc/jq

oniguruma

Use dev-libs/oniguruma for regular expression support

app-misc/kryoflux-dtc

demos

Install example floppy game files.

fast-firmware

Install fast firmware instead of slow firmware.

app-misc/lcd4linux

apm

Enable the APM plugin.

asterisk

Enable the Asterisk plugin.

button-exec

Enable the Button plugin, to execute something on keypress.

cpuinfo

Enable the cpuinfo plugin.

dbus

Enable the dbus plugin.

diskstats

Enable the diskstats plugin.

dvb

Enable support for the DVB plugin.

event

Enable the event plugin.

exec

Enable the exec plugin, to read output from external programs.

fifo

Enable the FIFO (First-In, First-Out) plugin.

file

Enable the file plugin, to read from input from files.

gps

Enable the gps plugin, for reading gps coordinates.

hddtemp

Enable the hddtemp plugin, to read from the hddtemp daemon.

huawei

Enable the huawei plugin, to read from a huawei device.

i2c-sensors

Enable the i2c_sensors plugin, to read sensor data.

iconv

Enable the iconv plugin, to convert between encodings.

isdn

Enable the isdn plugin, to get information about ISDN.

kvv

Enable the kvv plugin, to get realtime train schedule from the Karlsruher Verkehrsverbund.

loadavg

Enable the loadavg plugin, to get stats load

meminfo

Enable the meminfo plugin, to get memory statistics.

mpd

Enable the mpd plugin, to read from the Music Player Daemon.

mpris-dbus

Enable the mpris plugin, to read data via dbus for mpris.

mysql

Enable the mysql plugin, to get mysql database information.

netdev

Enable the netdev plugin, to get interface statistics.

netinfo

Enable the netinfo plugin, to get more interface statistic.

outb

Enable raw i/o access.

pop3

Enable the pop3 plugin, to get notified about new mails.

proc-stat

Enable the proc_stat plugin, to read data from the proc file system.

python

Enable support for dev-lang/python and enable the python plugin, to execute own python scripts.

qnaplog

Enable the qnaplog plugin, to read a log from a QNAP device.

raspi

Enable the raspi plugin, to read sensor data from a Raspberry Pi.

sample

Enable the sample plugin.

statfs

Enable the statfs plugin, to get statistics about the file system.

uname

Enable the uname plugin, to get the output of uname.

uptime

Enable the uptime plugin.

w1retap

Enable the w1retap plugin.

wireless

Enable the wireless plugin, to get wireless statistics.

app-misc/lcdproc

ethlcd

Enable support for ethlcd in the hd44780 driver.

extra-charmaps

Enable extra language specific charmaps.

nfs

Display NFS filesystem stats in the lcdproc client.

png

Enable support for media-libs/libpng in the glcd driver.

samba

Display SMBFS filesystem stats in the lcdproc client.

test-menu

Enable test menu support for the lcdproc server.

truetype

Enable support for media-libs/freetype in the glcd driver.

app-misc/libdatovka

openssl

Use openssl backend

app-misc/lirc

audio

Support using an audio device connected to an IR receiver

devinput

Support the devinput input device

ftdi

Support FTDI devices

gtk

Include GTK support which enables the use of lirc-setup

inputlirc

Add a dependency on app-misc/inputlircd

uinput

Enable support for uinput

app-misc/mc

edit

Compile and install the mcedit application

sftp

Add support for sftp (uses net-libs/libssh2 for it).

slang

Use sys-libs/slang instead of sys-libs/ncurses.

app-misc/mime-types

nginx

Enable mime-types support for www-servers/nginx package

app-misc/mosquitto

bridge

Enable bridge support in the MQTT broker.

persistence

Store messages and subscriptions to a file.

srv

Include SRV lookup support.

websockets

Support the WebSocket protocol.

app-misc/muttprint

doc

Builds documentation

app-misc/neofetch

X

Enable support for detecting DEs, WMs, screen resolutions, and showing images from an X terminal

app-misc/nnn

8contexts

Enable 8 contexts (instead of 4)

colemak

Key bindings for Colemak keyboard layout

colemak-dh

Key bindings for Colemak-DH keyboard layout

emoji

Display icons using emoji

gitstatus

Add git status column to the detail view

icons

Display icons using icons-in-terminal

namefirst

Print filenames first in the detail view

nerdfonts

Display icons using nerdfonts icons

qsort

Use Alexey Tourbin's quick sort implementation

restorepreview

Add pipe to close and restore preview-tui for internal undetached edits

app-misc/note

general

Add support for ascii flatfile backend

text

Add support for text backend

app-misc/ola

ftdi

Support FTDI devices

http

Enable built-in Web UI

rdm-tests

Install RDM responder tests

app-misc/pax-utils

python

Install a more powerful/faster version of lddtree

app-misc/recoll

camelcase

Enable indexing for camelCase sentences and words

chm

Enable CHM file support via dev-python/pychm

inotify

Use the Linux Kernel notification subsystem for monitoring file alterations in realtime

session

Stop monitoring file alterations when X11 session terminates

webengine

Use dev-qt/qtwebengine for fancy result list display

app-misc/rlwrap

debug

Enable debug

app-misc/screen

multiuser

Enable multiuser support (by setting correct permissions)

nethack

Express error messages in nethack style

app-misc/screenfetch

X

Use the media-gfx/scrot package to take screenshots

app-misc/sphinx

id64

use 64-bit document and word IDs

mariadb

Add mariadb database support

stemmer

Enable language stemming support

app-misc/task

sync

Enable "task sync" support

app-misc/tmux

utempter

Include libutempter support

app-misc/tracker

miners

Install the app-misc/tracker-miners package for actual data mining support for tracker

stemmer

Add word stemming via dev-libs/snowball-stemmer.

app-misc/tracker-miners

cue

Enable cue sheet parsing

gsf

Enable gnome-extra/libgsf based data extractor and for ODT.

iptc

Enable extraction of IPTC data from pictures

iso

Enable extraction of metadata from ISO disk images

playlist

Add support for playlists

xps

Add support for XPS file format through app-text/libgxps.

app-misc/unfoo

minimal

Do not install all support archive binaries

app-misc/vcontrold

vclient

Build the vclient helper program to talk to vcontrold

vsim

Build the vsim helper program (simulates the heating's answers, for development and debugging)

app-misc/vifm

extended-keys

Support for extended keys (arrows, home etc)

gtk

Use gtk+ to determine mimetypes

vim

Install the vifm vim plugin and vim-compatible documentation

app-misc/worker

avfs

Enable support for sys-fs/avfs

app-misc/yq

yq-symlink

Create a yq symlink to yq-python.

app-misc/yq-go

yq-symlink

Create a yq symlink to yq-go.

app-mobilephone/gammu

curl

Enables curl support

irda

Enables infrared support

mysql

Use mysql for data storage

nls

Enable native language support

odbc

Use ODBC as DB connector

postgres

Use PostgreSQL for data storage

usb

Enable USB suport

app-mobilephone/gnokii

ical

Enable support for dev-libs/libical

irda

Enable infrared support

pcsc-lite

Enable smartcard support with sys-apps/pcsc-lite

sms

Enable SMS support (build smsd)

app-mobilephone/smstools

stats

Enable statistic reporting

app-office/abiword

collab

Enable collaborative editing plugin

goffice

Enable goffice plugin

grammar

Enable grammar checking via dev-libs/link-grammar

map

Enable world map support through media-libs/libchamplain

math

Enable support for x11-libs/gtkmathview

ots

Enable Text Summarizer plugin

plugins

Enable plugins build (see http://www.abisource.com/wiki/PluginMatrix for more information). If your file cannot be opened due lack of support, try enabling this.

redland

Enables support redland and raptor libs.

thesaurus

Enable thesaurus support

wordperfect

Enable wordperfect file support via app-text/libwpd

app-office/calcurse

caldav

Support CalDAV

app-office/calligra

charts

Build chartshape plugin for creating business charts with dev-libs/kdiagram

import-filter

Enable support for various import filter file formats like WordPerfect, Visio and Apple Keynote

lcms

Build colorengine plugins using media-libs/lcms

okular

Enable bindings for kde-apps/okular

phonon

Build stage/eventplugins and videoshape plugin using media-libs/phonon

webengine

Enable Braindump support using dev-qt/qtwebengine

app-office/calligraplan

activities

Enable kactivities support

holidays

Enable kde-frameworks/kholidays integration

kwallet

Enable access to encrypted OpenDocument files with kde-frameworks/kwallet storage

app-office/glabels

barcode

Enable barcode support through external libraries.

app-office/gnucash

aqbanking

Connect to some internet banks via AqBanking

quotes

Enable online stock quote retrieval

register2

Use the new register (Experimental)

app-office/gnumeric

libgda

Enable database support through gnome-extra/libgda.

perl

Enable perl plugin loader.

app-office/grisbi

goffice

enable goffice graphic support

app-office/kexi

experimental

Enable features deemed experimental by upstream

marble

Enable displaying of maps using kde-apps/marble

mdb

Enable support for Microsoft Access database

app-office/kmymoney

activities

Enable kde-plasma/plasma-activities integration

addressbook

Enable kde-apps/akonadi contact integration

hbci

Enable HBCI support using net-libs/aqbanking

holidays

Enable kde-frameworks/kholidays integration

app-office/kraft

pim

Enable support for KDE PIM resources integration

app-office/libalkimia

webengine

Enable online quotes using dev-qt/qtwebengine

app-office/libreoffice

base

Enable full support for LibreOffice Base databases (involves additional bundled libs)

clang

Use Clang compiler instead of GCC

coinmp

Use sci-libs/coinor-mp as alternative solver

googledrive

Enable support for remote files on Google Drive

mariadb

Prefer mariadb connector over mysql connector

odk

Build the Office Development Kit

pdfimport

Enable PDF import via the Poppler library

vulkan

Enable Vulkan usage via the skia library (clang recommended)

app-office/libreoffice-l10n

offlinehelp

Install help files locally instead of using the LibreOffice Wiki

app-office/lyx

aspell

Add support for aspell spellchecking

dia

Add support for diagrams (app-office/dia)

dot

Add support for DOT import (media-gfx/graphviz)

enchant

Add support for enchant spellchecking wrapper (both aspell and hunspell can be used by LyX).

gnumeric

Add support for importing Gnumeric/OpenOffice/MS Excel spreadsheets into LyX.

html

Add support for HTML import

hunspell

Add support for spellchecking based on hunspell and reuse system-wide OpenOffice dictionaries. This also enable thesaurus dictionaries not accessible via aspell.

monolithic-build

This should speed up compilation significantly when you have enough RAM (> 600 MB)

rcs

Add support for revision control via dev-vcs/rcs

rtf

Add support for RTF import/export packages

app-office/magicpoint

contrib

Install additional contributed scripts

app-office/mdbtools

glib

Use functions provided by dev-libs/glib, not built-in

app-office/planner

libgda

PostgreSQL support via gnome-extra/libgda

app-office/sc-im

ods

Add ods import support

plots

Add sci-visualization/gnuplot for plotting support

tmux

Use app-misc/tmux for clipboard copy/paste

wayland

Use gui-apps/wl-clipboard for clipboard copy/paste

X

Use x11-misc/xclip for clipboard copy/paste

xls

Add xls support

xlsx

Add xlsx support

app-office/scribus

boost

Enable support for Boost based enhancement

hunspell

Enable support for spell checking with app-text/hunspell

minimal

Don't install headers (only required for e.g. plug-in developers)

osg

3D rendering via dev-games/openscenegraph

scripts

Install the scripts

templates

Document templates

tk

Install tk based scripts e.g. FontSample.py

app-office/skrooge

activities

Enable kactivities support

app-office/texmacs

netpbm

Add support for media-libs/netpbm

app-office/texstudio

video

Enable video player in pdf files

app-pda/gtkpod

clutter

Enable clutter support for displaying coverart

app-portage/conf-update

colordiff

Use colors when displaying diffs (app-misc/colordiff)

app-portage/eix

debug

Build with upstream's CXXFLAGS/LDFLAGS for debugging support; not recommended for normal use.

doc

Create description of the eix cache file additionally in html format

sqlite

Compile in support for portage's sqlite backend; to actually use it you need additional configuration of portage and eix

app-portage/gemato

gpg

Install dependencies needed for OpenPGP signature verification support

pretty-log

Pull dev-python/rich to enable pretty logs

tools

Install additional utilities (benchmarks, hash testing tools, fast Manifest generators) to /usr/share/gemato.

app-portage/grs

server

Install all the tools building systems

app-portage/hackport

profile

Enable profiling flags

app-portage/kuroneko

scraper

Include the dependencies necessary for Bugzilla scraping.

app-portage/nattka

depgraph-order

Process packages in depgraph order whenever possible.

app-portage/pfl

network-cron

Adds a cron job which does a weekly submit of the package database

app-portage/portage-utils

qmanifest

Build qmanifest applet, this adds additional dependencies for GPG, OpenSSL and BLAKE2B hashing

qtegrity

Build qtegrity applet, this adds additional dependencies for OpenSSL

app-portage/tatt

templates

Install template scripts to be used with tatt

app-shells/atuin

client

Enable the autin client

daemon

Enable the autin background daemon on the client

server

Enable the autin server

sync

Enable the server-sync feature in the autin client

app-shells/autojump

ipython

Add support for dev-python/ipython

app-shells/bash

bashlogger

Log ALL commands typed into bash; should ONLY be used in restricted environments such as honeypots

mem-scramble

Build with custom malloc/free overwriting allocated/freed memory

net

Enable /dev/tcp/host/port redirection

pgo

Optimize the build using Profile Guided Optimization (PGO)

plugins

Add support for loading builtins at runtime via 'enable'

app-shells/bash-completion

eselect

Support blacklisting of completions via 'eselect bashcomp'. This enables custom Gentoo patching of upstream completion loader.

app-shells/mksh

lksh

variant that uses POSIX-compliant arithmetics with the host “long” data type and is automatically in POSIX mode when called as /bin/sh

app-shells/nushell

plugins

Build official plugins

app-shells/pdsh

rsh

This allows the use of rsh (remote shell) and rcp (remote copy) for authoring websites. sftp is a much more secure protocol and is preferred.

app-shells/shish

diet

Use dev-libs/dietlibc

app-text/atril

caja

Enable property page extension in mate-base/caja

dvi

Enable build-in DVI viewer

epub

Enable build-in DVI viewer using net-libs/webkit-gtk

synctex

Enable search highlighting through synctex (virtual/tex-base)

t1lib

Enable the Type-1 fonts for the build-in DVI viewer (media-libs/t1lib)

xps

Enable XPS viewer using app-text/libgxps

app-text/blogc

git

Build blogc-git-receiver tool

httpd

Build blogc-runserver tool

make

Build blogc-make tool

app-text/calibre

font-subsetting

Enable font subsetting support

system-mathjax

Use a system copy of mathjax

unrar

Enable support for comic books compressed with the non-free Rar format

app-text/cmigemo

vim

Install Vim plugin for C/Migemo

app-text/crengine-ng

chm

Support chm format

fribidi

Support bidirectional text by dev-libs/fribidi

harfbuzz

Use media-libs/harfbuzz for kerning and ligatures

libunibreak

Use dev-libs/libunibreak for hyphenation

libutf8proc

Use dev-libs/libutf8proc for manipulating unicode strings

app-text/crm114

mew

Add support for using the mewdecode mime decoder (app-emacs/mew)

normalizemime

Add support for using the normalizemime (mail-filter/normalizemime)

app-text/crqt-ng

chm

Support chm format

fribidi

Support bidirectional text by dev-libs/fribidi

harfbuzz

Use media-libs/harfbuzz for kerning and ligatures

libunibreak

Use dev-libs/libunibreak for hyphenation

libutf8proc

Use dev-libs/libutf8proc for manipulating unicode strings

app-text/crwx-ng

chm

Support chm format

fribidi

Support bidirectional text by dev-libs/fribidi

harfbuzz

Use media-libs/harfbuzz for kerning and ligatures

libunibreak

Use dev-libs/libunibreak for hyphenation

libutf8proc

Use dev-libs/libutf8proc for manipulating unicode strings

app-text/dblatex

inkscape

Use inkscape to convert SVG. Disable to use gnome-base/librsvg instead.

app-text/dictd

judy

Build Judy-based (dev-libs/judy) plugin implementing fast "exact" and especially "lev" strategies

minimal

Don't build server but dict client, dictzip and dictfmt only.

app-text/docbook-sgml-utils

jadetex

Add support for processing tex files produced by the TeX backend of Jade

app-text/docbook-xsl-ns-stylesheets

ruby

Install the Ruby-based dbtoepub script; requires an interpreter compatible with app-eselect/eselect-ruby.

app-text/docbook-xsl-stylesheets

ruby

Install the Ruby-based dbtoepub script; requires an interpreter compatible with app-eselect/eselect-ruby.

app-text/doxygen

clang

support for sys-devel/clang assisted parsing

dot

allow to create dot graphs using media-gfx/graphviz

doxysearch

build doxyindexer and doxysearch.cgi

app-text/ebook-tools

lit2epub

Install lit2epub script

app-text/editorconfig-core-c

cli

Install command line interface.

app-text/enchant

aspell

Adds support for app-text/aspell spell checker

hunspell

Adds support for app-text/hunspell spell checker

nuspell

Adds support for app-text/nuspell spell checker

voikko

Adds support for dev-libs/libvoikko spell checker

app-text/evince

dvi

Enable the built-in DVI viewer

nautilus

Enable property page extension in gnome-base/nautilus

postscript

Enable support for PostScript and Adobe Illustrator documents with app-text/libspectre

spell

Enable inline spell check for annotations via app-text/gspell

xps

Enable XPS viewer using app-text/libgxps

app-text/feathernotes

X

Link application against X11 libraries which adds support for virtual desktop awareness and tab DND

app-text/ghostscript-gpl

unicode

Add support for unicode passwords via net-dns/libidn

app-text/groonga

abort

Enable query abortion

benchmark

Build benchmark programs

dynamic-malloc-change

Allow dynamic memory allocation change for testing

exact-alloc-count

Atomic counting for memory alloc count

fmalloc

Make memory allocation failed in specified condition for debug

futex

Use futex

libevent

Enable dev-libs/libevent used for suggestion

mecab

Use app-text/mecab for morphological analysis

msgpack

Enable dev-libs/msgpack used for suggestion

nfkc

Use nfkc based utf8 normalization

sphinx

Enable document generation by app-misc/sphinx

uyield

Build for detecting race conditions

zeromq

Enable net-libs/zeromq used for suggestion

app-text/htmltidy

deprecated

Install tools and header files which are now considered deprecated

app-text/hyperestraier

mecab

Enable app-text/mecab support for Estraier

app-text/kbibtex

webengine

Use dev-qt/qtwebengine for HTML previews

app-text/lcdf-typetools

kpathsea

Enable integration with kpathsea search library (TeX related)

app-text/libebook

tools

Build file conversion tools

app-text/libgepub

webkit

Build with GepubWidget based on Webkit

app-text/libmwaw

tools

Build file conversion tools

app-text/libqxp

tools

Build file conversion tools

app-text/libstaroffice

tools

Build conversion tools

zlib

Enable support for compressed data

app-text/libwpd

tools

Build file conversion tools

app-text/libwps

tools

Build file conversion tools

app-text/mandoc

cgi

build man.cgi web plugin for viewing man pages

system-man

set as the default man provider

app-text/mathtex

png

Generate png images by default instead of gif

app-text/msort

heap

Use heap instead of alloca()

icu

Use dev-libs/icu instead of dev-libs/libutf8proc.

libuninum

Use dev-libs/libuninum for conversion.

app-text/mupdf

archive

Enable support for CBR and other archive formats using libarchive

app-text/pandoc

embed-data-files

Embed data files in binary for relocatable executable.

trypandoc

Build trypandoc cgi executable.

app-text/pandoc-bin

pandoc-symlink

Install pandoc symlink that points to pandoc-bin

app-text/pandoc-cli

lua

Support custom modifications and conversions with the pandoc Lua scripting engine.

nightly

Add '-nightly-COMPILEDATE' to the output of '--version'.

server

Include support for running pandoc as an HTTP server.

app-text/pdfgrep

unac

Removing accents and ligatures before search

app-text/pdfjam

extra

Install unsupported wrapper scripts, for example pdf90, pdfnup, pdfjoin

app-text/pdfpc

gstreamer

Compile support for movie playback (media-libs/gstreamer)

soup

Compile support for REST server (net-libs/libsoup)

webkit

Enable viewing Markdown notes (net-libs/webkit-gtk)

app-text/pelican

markdown

Markdown support

app-text/podofo

boost

Add support for boost

tools

Build and install commandline tools.

app-text/poppler

boost

Use boost::small_vector for a serious performance gain

gpgme

Enable signatures handling with app-crypt/gpgme

nss

Enable signatures handling with dev-libs/nss

utils

Install command-line PDF converters and various utilities.

app-text/qpdfview

fitz

Use experimental fitz rendering, provided by app-text/mupdf, instead of poppler

synctex

Add support for searching TeX sources

app-text/robodoc

examples

Installs usage examples in /usr/share for Perl

app-text/sdcv

darkterm

Improve readability of color output on terminals with dark background.

app-text/sigil

plugins

Installed needed Python packages for using Sigil plugins

system-mathjax

Use the system-wide dev-libs/mathjax instead of bundled

app-text/sword

clucene

Use dev-cpp/clucene for lucene search support

app-text/tessdata_best

osd

Enable support orientation and script detection.

app-text/tessdata_fast

osd

Enable support orientation and script detection.

app-text/tessdata_legacy

math

Enable support for recognition of equations.

osd

Enable support orientation and script detection.

app-text/tesseract

float32

Support float for model training and text recognition (faster, requires less RAM)

opencl

Enable opencl support for speedup using GPU computation.

training

Install training applications to add support for new languages.

app-text/texlive

context

Add support for the ConTeXt format (dev-texlive/texlive-context)

extra

Add support for extra TeXLive packages

games

Add typesetting support for games (chess, etc.) (dev-texlive/texlive-games)

graphics

Add support for several graphics packages (pgf, tikz,...)

humanities

Add LaTeX support for the humanities (dev-texlive/texlive-humanities)

luatex

Install TeX Live packages that require luatex

metapost

Add support for metapost: A tool for creating graphics in scalable PostScript

music

Add support for music typesetting (dev-texlive/texlive-music)

pdfannotextractor

Add dev-tex/pdfannotextractor support, for extracting annotations from PDF files

pstricks

Add pstricks packages (dev-texlive/texlive-pstricks)

publishers

Add support for publishers (dev-texlive/texlive-publishers)

science

Add typesetting support for natural and computer sciences (dev-texlive/texlive-mathscience)

tex4ht

Add support for dev-tex/tex4ht (for converting (La)TeX to (X)HTML, XML and OO.org)

texi2html

Add support for app-text/texi2html which converts texi files to HTML

xetex

Add support for XeTeX macros (dev-texlive/texlive-xetex)

app-text/texlive-core

luajittex

Add support for LuaJitTeX: LuaTeX based on LuaJIT which is usually faster.

xetex

Add support for XeTeX: a TeX system with Unicode and modern font technologies.

xindy

Add support for Xindy: A general-purpose index processor.

app-text/wdiff

experimental

Build experimental utilities (mdiff, unify, wdiff2)

app-text/webgen

builder

Enable programmatic HTML/XML generation

highlight

Enable syntax highlighting for certain plugins

markdown

Markdown support

app-text/writerperfect

abiword

Add support for abiword format using app-text/libabw

ebook

Add support for various ebook formats using app-text/libebook

epub

Add support for conversion to ePub format using app-text/libepubgen

freehand

Add support for freehand format using media-libs/libfreehand

gsf

Add support for structured files using gnome-extra/libgsf

keynote

Add support for keynote format using app-text/libetonyek

mspub

Add support to mspub format using app-text/libmspub

mwaw

Add support to mwaw formats using app-text/libmwaw

pagemaker

Add support to pagemaker formats using media-libs/libpagemaker

qxp

Add support for QuarkXpress documents using app-text/libqxp

visio

Add support for visio format using media-libs/libvisio

wpd

Add support for wpd format using app-text/libwpd

wpg

Add support for wpg format using app-text/libwpg

wps

Add support for wps format using app-text/libwps

zmf

Add support for Zoner Callisto/Draw documents format using media-libs/libzmf

app-text/wv

tools

Install optional utilities considered deprecated in favor of using AbiWord.

app-text/xmlto

text

Support conversion from XML to plain text

app-text/xpdf

cmyk

Include support for CMYK rasterization

i18n

Enable support non-UTF8 national charsets

icons

Generate desktop PNG icons using rsvg-convert from gnome-base/librsvg

libpaper

Use app-text/libpaper to get paper preferences

metric

Use A4 instead of US Letter paper size by default for PostScript output. This option has effect only if libpaper USE flag is disabled

opi

Include support for OPI (Open Prepress Interface) comments

textselect

Allow text selection

utils

Install command-line PDF converters and various utilities

app-text/zathura

synctex

Use libsynctex to get latex codeline from pdf

app-text/zathura-meta

cb

Install plug-in for ComicBook support

app-text/zeal

X

Enable global shortcut support on X11

app-vim/gentoo-syntax

ignore-glep31

Remove GLEP 31 (UTF-8 file encodings) settings

app-xemacs/xemacs-packages-all

mule

Add multi-language support to XEmacs

dev-ada/AdaSAT

shared

Build shared library

static-pic

Build static library with pic code

dev-ada/aws

shared

Build shared library

wsdl

Used to convert ada to wsdl

dev-ada/gnatcoll-bindings

shared

Build shared library

static-pic

Build shared library

dev-ada/gnatcoll-core

shared

Build shared library

static-pic

Build static library with pic code

dev-ada/gnatcoll-db

db2ada

Build gnatcoll_db2ada

gnatinspect

Build gnatinspect

shared

Build shared library

sql

Build sql library

static-pic

Build shared library

xref

Build xref library

dev-ada/gpr

shared

Build shared library

static-pic

Build static library with pic code

dev-ada/gpr-unit-provider

shared

Build shared library

static-pic

Build static library with pic code

dev-ada/gtkada

shared

Build gtkada as shared library

static-pic

Build static library with pic code

dev-ada/lal-refactor

shared

Build shared library

static-pic

Build static library with pic code

dev-ada/langkit

shared

Build shared library

static-pic

Build static library with pic code

dev-ada/libadalang

static-pic

Build static library with pic code

dev-ada/libadalang-tools

shared

Build shared library

static-pic

Build static library with pic code

dev-ada/libgpr

shared

Build shared library

static-pic

Build static library with pic code

dev-ada/spawn

glib

Add support to dev-libs/glib-based mainloop.

shared

Build shared library

static-pic

Build static library with pic code

dev-ada/templates-parser

shared

Build shared library

dev-ada/VSS

shared

Build shared library

static-pic

Build static library with pic code

dev-ada/xmlada

shared

Build shared library

static-pic

Build static library with pic code

dev-build/bazelisk

bazel-symlink

Install bazel symlink that points to bazelisk

dev-build/cmake

dap

Build debugger for CMake with Debug Adapter Protocol support via dev-cpp/cppdap

dev-build/muon

archive

Enable extracting wraps using app-arch/libarchive.

libpkgconf

Enable looking up packages via dev-util/pkgconf.

dev-cpp/benchmark

exceptions

Enable the use of exceptions in the benchmark library

libcxx

Use sys-libs/libcxx instead of libstdc++ as the default stdlib

libpfm

Enable dev-libs/libpfm support

tools

Install some additional Python tools

dev-cpp/eigen

adolc

Add test support for Adolc (sci-libs/adolc)

benchmark

Build benchmark suite

boost

Add test support for Boost.Multiprecision (dev-libs/boost)

cholmod

Add test support for CHOLMOD (sci-libs/cholmod)

clang

Use clang for cuda units compilation

fftw

Add test support for fftw (sci-libs/fftw)

hip

Enable HIP GPU computing support

klu

Add test support for KLU (sci-libs/klu)

mathjax

Use MathJax for rendering math in HTML docs (dev-libs/mathjax)

opengl

Add test support for OpenGL

openmp

Add test support for the OpenMP (support parallel computing)

pastix

Add test support for PaStiX (sci-libs/pastix)

sparsehash

Add test support for GoogleHash (dev-cpp/sparsehash)

spqr

Add test support for SPQR (sci-libs/spqr)

superlu

Add test support for SuperLU (sci-libs/superlu)

umfpack

Add test support for UMFPACK (sci-libs/umfpack)

dev-cpp/glog

gflags

Use dev-cpp/gflags for flag parsing

libunwind

Use libunwind library (sys-libs/libunwind or sys-libs/llvm-libunwind) instead of built-in fallback implementation for stack unwinding

dev-cpp/jwt-cpp

picojson

Enable use of dev-cpp/picojson

dev-cpp/libcmis

tools

Build client tool for testing and viewing features

dev-cpp/libjson-rpc-cpp

http-client

Build support for HTTP client using net-misc/curl

http-server

Build support for HTTP server using net-libs/libmicrohttpd

redis-client

Build support for Redis client using dev-libs/hiredis

redis-server

Build support for Redis server using dev-libs/hiredis

stubgen

Build header stub code generator (needed for development and when pregenerated headers are not bundled)

dev-cpp/msgpack-cxx

boost

Enable boost support

dev-cpp/opentelemetry-cpp

jaeger

Include the jaeger exporter

prometheus

include the Prometheus Client in the SDK

dev-cpp/sdbus-c++

systemd

Use external libsystemd instead of statically-linked build

tools

Install interface stub code generator

dev-db/etcd

server

Installs etcd daemon

dev-db/firebird

server

Install the server components of Firebird, not just the client

xinetd

Install ClassicServer

dev-db/mariadb

backup

Build mariadb-backup which supports SST and hot backup of InnoDB, Aria and MyISAM including compression and encryption

columnstore

Build the ColumnStore storage engine

extraengine

Add support for alternative storage engines (Archive, CSV, Blackhole, Federated(X), Partition)

galera

Enables galera replication

innodb-lz4

Enables lz4 compression methods for InnoDB/XtraDB

innodb-lzo

Enables lzo compression methods for InnoDB/XtraDB

innodb-snappy

Enables snappy compression methods for InnoDB/XtraDB using app-arch/snappy

jdbc

Enable the CONNECT engine to access foreign databases via JDBC

latin1

Use LATIN1 encoding instead of UTF8

mroonga

Add support for the Mroonga engine for interfacing with the Groonga text search

numa

Enable NUMA support using sys-process/numactl (NUMA kernel support is also required)

oqgraph

Add support for the Open Query GRAPH engine

pam

Enable the optional PAM authentication plugin for the server

profiling

Add support for statement profiling (requires USE=community).

rocksdb

Add support for RocksDB; a key/value, LSM database optimized for flash storage

s3

Build the S3 storage engine

server

Build the server program

sphinx

Add suport for the sphinx full-text search engine

sst-mariabackup

Add tools needed to support the mariabackup SST method

sst-rsync

Add tools needed to support the rsync SST method

systemtap

Build support for profiling and tracing using dev-debug/systemtap

test

Install upstream testsuites for end use.

yassl

Enable SSL connections and crypto functions using the bundled yaSSL

dev-db/mongodb

mongosh

Install the MongoDB shell from app-admin/mongosh-bin

tools

Install the MongoDB tools (mongoimport, mongodump...) from app-admin/mongo-tools

dev-db/mycli

ssh

Add support for connection over SSH tunnel

dev-db/mysql

cjk

Add CJK support for InnoDB fulltext search using app-text/mecab

client-libs

Build the client libraries from the server package instead of the C Connector packages (not recommended)

experimental

Build experimental features aka "rapid" plugins

latin1

Use LATIN1 encoding instead of UTF8

numa

Enable NUMA support using sys-process/numactl (NUMA kernel support is also required)

profiling

Add support for statement profiling (requires USE=community).

router

Build the MySQL router program

server

Build the server program

systemtap

Build support for profiling and tracing using dev-debug/systemtap

test

Install upstream testsuites for end use.

dev-db/mysql-connector-c++

legacy

Build the legacy 1.x API as well as the DevX API

dev-db/oracle-instantclient

jdbc

Support for XA, Internationalization, and RowSet operations under JDBC

odbc

Libraries for enabling ODBC applications

precomp

"proc" binary and related files to precompile a Pro*C application

sdk

Header files and an example makefile for developing Oracle applications

sqlplus

The SQL*Plus command line tool for SQL and PL/SQL queries

tools

Data Pump, SQL*Loader and Workload Replay Client

dev-db/percona-server

cjk

Add CJK support for InnoDB fulltext search using app-text/mecab

latin1

Use LATIN1 encoding instead of UTF8

numa

Enable NUMA support using sys-process/numactl (NUMA kernel support is also required)

profiling

Add support for statement profiling (requires USE=community).

rocksdb

Add support for RocksDB; a key/value, LSM database optimized for flash storage

router

Build the MySQL router program

server

Build the server program

tokudb

Add support for TokuDB storage engine

tokudb-backup-plugin

Builds the TokuDB backup plugin

dev-db/pgbouncer

c-ares

Use c-ares as the DNS backend instead of evdns (libevent).

udns

Use udns as the DNS backend instead of evdns (libevent). Supports IPv4 only.

dev-db/pgpool2

memcached

Use memcached for query caching.

dev-db/phpmyadmin

setup

Installs the phpMyAdmin setup utility. Users who don't use the utility should disable this USE flag for security reasons as the setup tool was the target of various exploits in the past.

dev-db/postgis

address-standardizer

Normalize US and CA postal addresses

gtk

Build graphical interface for shp2pgsql (shp2pgsql-gui)

topology

Build topology spatial types and functions

dev-db/postgresql

llvm

Add support for llvm JIT engine

server

Disable to build and install the clients and libraries only.

uuid

Enable server side UUID generation (via dev-libs/ossp-uuid).

dev-db/psqlodbc

iodbc

Use dev-db/libiodbc. Disable to use dev-db/unixODBC.

dev-db/recutils

curl

Enable support for remote descriptors using net-misc/curl

mdb

Build the mdb2rec utility using app-office/mdbtools

dev-db/redict

tcmalloc

Use tcmalloc from dev-util/google-perftools for allocations.

dev-db/redis

tcmalloc

Use tcmalloc from dev-util/google-perftools for allocations.

dev-db/spatialite

geos

Add the sci-libs/geos library for exact topological tests

proj

Add the sci-libs/proj library for reprojection features

rttopo

Add the sci-geosciences/librttopo library for topology support

xls

Add the dev-libs/freexl library for xls import support

dev-db/sqldeveloper

sybase

Add support for the Sybase SQL Database Server

dev-db/sqlite

secure-delete

Enable overwriting of deleted content with zeros by default (http://sqlite.org/pragma.html#pragma_secure_delete), causing some performance penalty

tools

Install additional tools, among which are included: sqlite3-analyzer, sqlite3-changeset, sqlite3-db-dump, sqlite3-diff, sqlite3-rbu, sqlite3-expert and others.

dev-db/sqlitebrowser

sqlcipher

Allow to open and to edit databases encrypted using dev-db/sqlcipher

dev-db/sqlitestudio

cli

Build CLI interface

dev-db/timescaledb

proprietary-extensions

Enable proprietary features/extensions licensed under the TimeScale License

dev-db/unixODBC

minimal

Disable bundled drivers and extra libraries (most users don't need these)

odbcmanual

Administrator, Internal Structure, Programmer and User documentation

dev-debug/bpftrace

fuzzing

Build bpftrace for fuzzing

lldb

Parse debug info usingdev-debug/lldb

dev-debug/dtrace

test-install

Install the testsuite for manual use. It is not suitable for automatic execution within the ebuild because it requires root privlieges.

dev-debug/gdb

cet

Enable Intel Control-flow Enforcement Technology.

debuginfod

Enable debuginfod support via dev-libs/elfutils libdebuginfod

lzma

Support lzma compression in ELF debug info

multitarget

Support all known targets in one gdb binary

python

Enable support for the new internal scripting language, as well as extended pretty printers

server

Install the "gdbserver" program (useful for embedded/remote targets)

sim

Build gdb's simulators for various hardware platforms. See https://sourceware.org/gdb/wiki/Sim.

source-highlight

Enable listing highlighting via dev-util/source-highlight

xml

Support parsing XML data files needed (at least) for cpu features, memory maps, and syscall tracing

xxhash

Use dev-libs/xxhash to speed up internal hashing.

dev-debug/lldb

debuginfod

Expose the transitive dependencies on net-misc/curl and dev-cpp/cpp-httplib) to match sys-devel/llvm.

dev-debug/ltrace

elfutils

Use libdwfl from dev-libs/elfutils for frame unwinding support

unwind

Use sys-libs/libunwind for frame unwinding support

dev-debug/strace

aio

Enable dev-libs/libaio support for tracing Asynchronous I/O operations

elfutils

Enable stack backtraces (-k flag) via dev-libs/elfutils

unwind

Enable stack backtraces (-k flag) via sys-libs/libunwind

dev-debug/sysdig

modules

Build kernel modules needed for tracing local events. Disable this only if you intend to use sysdig purely to work with dumpfiles.

dev-debug/systemtap

debuginfod

Enable debuginfod support via dev-libs/elfutils libdebuginfod

dtrace-symlink

Provide /usr/bin/dtrace symlink pointing to /usr/bin/stap-dtrace. This prevents coinstallation with dev-debug/dtrace.

libvirt

Support probing of libvirt domains.

dev-embedded/avrdude

ftdi

Enable support for USB FTDI chips via dev-embedded/libftdi

dev-embedded/libftdi

tools

build ftdi_eeprom helper tool

dev-embedded/openocd

capstone

Use dev-libs/capstone for disassembly support

cmsis-dap

Support for CMSIS-DAP compliant adapters

dummy

Build the dummy port driver

ftdi

Enable support for USB FTDI chips via dev-embedded/libftdi

gpiod

Enable Linux GPIO bitbang support via libgpiod

jlink

Build the SEGGER J-Link driver

parport

Enable support for parport JTAG devices

verbose-io

Verbose IO and comm JTAG and USB messages

dev-embedded/rpi-eeprom

pi4

Install firmware files for the Raspberry Pi 4

pi5

Install firmware files for the Raspberry Pi 5

dev-embedded/sdcc

avr

Add support for AVR -- not supported upstream

boehm-gc

Enable Hans Boehm's garbage collector dev-libs/boehm-gc

device-lib

Enable built of devices libraries

ds390

Add support for Dallas DS390

ds400

Add support for Dallas DS400

ez80-z80

Add support for EZ80-Z80

gbz80

Add support for Gameboy gbz80

hc08

Add support for Freescale/Motorola HC08 based

mcs51

Add support for Intel mcs51

mos6502

Add support for MOS 6502

mos65c02

Add support for MOS 65C02

non-free

Enable non-free runtime library parts

packihx

Enable Intel HEX files pack utility

pdk13

Add support for PDK13

pdk14

Add support for PDK14

pdk15

Add support for PDK15

pdk16

Add support for PDK16

pic14

Add support for Microchip 14 bits PICs

pic16

Add support for Microchip 16 bits PICs

r2k

Add support for Rabbit 2000

r2ka

Add support for Rabbit 2000A

r3ka

Add support for Rabbit 3000A

s08

Add support for Freescale/Motorola S08

sdbinutils

Enable SDCC library archive utilities sdar, sdranlib, sdnm

sdcdb

Enable SDCC source level debugger

sdcpp

Enable SDCC preprocessor based on GCC cpp

sm83

Add support for Gameboy SM83

stm8

Add support for STMicroelectronics STM8

tlcs90

Add support for TLCS-90

ucsim

Enable software simulator for microcontrollers

z180

Add support for Zilog Z180

z80

Add support for Zilog Z80

z80n

Add support for Zilog Z80N

dev-embedded/u-boot-tools

envtools

Build only the target-side environment tools

dev-embedded/urjtag

ftd2xx

Enable support for USB FTDI chips via dev-embedded/libftd2xx

ftdi

Enable support for USB FTDI chips via dev-embedded/libftdi

dev-games/godot

deprecated

Enable support for deprecated features

raycast

Enable the raycast Editor module using media-libs/embree

tools

Enable the Godot Editor for game development

dev-games/guichan

allegro

Build the Allegro frontend

dev-games/mygui

l10n_ru

Install some additional russian docs if 'doc' useflag enabled

ogre

Use the ogre render subsystem. (cannot combine with opengl)

opengl

Use the opengl render subsystem. (cannot combine with ogre)

plugins

Build MyGUI plugins

samples

Install MyGUI demos (needs ogre USE flag)

tools

Build the tools for development

dev-games/ode

double-precision

more precise calculations at the expense of speed

gyroscopic

enable gyroscopic term (may cause instability)

dev-games/ogre

assimp

Use media-libs/assimp to import assets from 3D files

boost

Enable boost support

bullet

Use sci-physics/bullet for physics plugin

cache

Enable GL state cache support

cg

NVIDIA toolkit plugin

deprecated

Build deprecated nodeless positioning of Lights and Cameras.

double-precision

More precise calculations at the expense of speed

egl

Use egl instead of glx

fine-granularity

Enable fine light mask granularity. This impacts on performance and should not be enabled unless an application really needs it.

freeimage

Support images via media-libs/freeimage

gl3plus

Build OpenGL 3+ RenderSystem

gles3

Enable OpenGL ES 3.x Features

json

Use dev-libs/rapidjson (needed by Hlms JSON materials)

legacy-animations

Use the skeletal animation from 1.x. It's much slower, but the new system is still experimental.

ois

Pull in Object-oriented Input System library dev-games/ois for samples

poco

When USE=threads, use poco for threading

resman-pedantic

Resource Manager PEDANTIC : require an explicit resource group. Case sensitive lookup. Some demos might not work with this setting. (default: case-insensitive + sensitive lookup in all groups)

tbb

When USE=threads, use tbb for threading

tools

Build and install AssimpConverter (assimp USE flag is enabled), MeshUpgrader, VRMLConverter and XMLConverter

dev-games/openscenegraph

collada

Enable DAE file support via dev-libs/collada-dom

dicom

Enable DICOM medical image file support via sci-libs/dcmtk

fox

Build examples using x11-libs/fox library

gdal

Enable support for sci-libs/gdal library

las

Enable support for geospatial data LAS LiDAR format using sci-geosciences/liblas

openinventor

Build OpenInventor plugin

osgapps

Build osg applications

sdl2

Use media-libs/libsdl2 additionally to media-libs/libsdl

xrandr

Enable support for the X xrandr extension

dev-games/openscenegraph-openmw

collada

Enable DAE file support via dev-libs/collada-dom

dicom

Enable DICOM medical image file support via sci-libs/dcmtk

fox

Build examples using x11-libs/fox library

gdal

Enable support for sci-libs/gdal library

las

Enable support for geospatial data LAS LiDAR format using sci-geosciences/liblas

openinventor

Build OpenInventor plugin

osgapps

Build osg applications

sdl2

Use media-libs/libsdl2 additionally to media-libs/libsdl

xrandr

Enable support for the X xrandr extension

dev-games/physfs

7zip

Enable 7zip/lzma archive support

grp

Enable Build Engine GRP archive support

hog

Enable Descent I/II HOG archive support

iso

Enable ISO9660 file support

mvl

Enable Descent I/II MVL archive support

qpak

Enable Quake I/II QPAK archive support

slb

Enable Independence War SLB archive support

vdf

Enable Gothic/Gothic II VDF archive support

wad

Enable Doom WAD archive support

dev-games/simgear

dns

Enable DNS resolver via net-libs/udns

gdal

Enable alternative terrain engine based on pagedLOD via sci-libs/gdal

subversion

Enable terrasync scenery downloader

dev-games/tiled

minimal

Exclude optional plugins and development headers

dev-gap/grape

bliss

Use sci-libs/bliss instead of sci-mathematics/nauty as the backend.

dev-haskell/abstract-deque

usecas

Enable the reference implementation to use hardware compare-and-swap.

dev-haskell/aeson

cffi

Controls whether to include c-ffi bits or pure haskell. Default to False for security.

ordered-keymap

Use ordered @Data.Map.Strict@ for KeyMap implementation.

dev-haskell/aeson-pretty

executable

build/install the command-line tool as well as the library

lib-only

don't build 'aeson-pretty' executable.

dev-haskell/ansi-terminal

example

Build the example application

dev-haskell/assoc

tagged

You can disable the use of the `tagged` package using `-f-tagged`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.

dev-haskell/atomic-primops

debug

Enable extra internal checks.

dev-haskell/bifunctors

semigroups

You can disable the use of the `semigroups` package using `-f-semigroups`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.

tagged

You can disable the use of the `tagged` package using `-f-tagged`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.

dev-haskell/bitvec

gmp

Link against the GMP library for the ultimate performance of `zipBits`, `invertBits` and `countBits`. Users are strongly encouraged to enable this flag whenever possible.

dev-haskell/boring

tagged

You can disable the use of the `tagged` package using `-f-tagged`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.

dev-haskell/c2hs

regression

Enable regression suite build.

dev-haskell/cabal-install

lukko

Use @lukko@ for file-locking

native-dns

Enable use of the [resolv](https://hackage.haskell.org/package/resolv) & [windns](https://hackage.haskell.org/package/windns) packages for performing DNS lookups

dev-haskell/cairo

svg

Build the Scalable Vector Graphics (SVG) backend of Cairo.

dev-haskell/chell

color-output

use colors in program output

dev-haskell/citeproc

executable

Build citeproc executable

icu

Use Haskell bindings to the ICU library

dev-haskell/cmdargs

examples

Build the cmdargs-demo program

quotation

Build the Quote module

testprog

Build the test program

dev-haskell/comonad

indexed-traversable

You can disable the use of the `indexed-traversable` package using `-f-indexed-traversable`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If disabled we will not supply instances of `FunctorWithIndex`

dev-haskell/contravariant

semigroups

You can disable the use of the `semigroups` package using `-f-semigroups`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.

statevar

You can disable the use of the `StateVar` package using `-f-StateVar`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.

tagged

You can disable the use of the `tagged` package on older versons of GHC using `-f-tagged`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.

dev-haskell/criterion

embed-data-files

Embed the data files in the binary for a relocatable executable. (Warning: This will increase the executabl size significantly.)

dev-haskell/crypto-api

all-cpolys

Build all the CMAC polynomes up to 10000 bits instead of just the usual ones

dev-haskell/cryptohash-sha256

executable

Build the cryptohash-sha256sum executable

dev-haskell/crypton

check-alignment

extra check on alignment in C layers, which cause lowlevel assert errors. for debugging only.

integer-gmp

Whether or not to use GMP for some functions

old-toolchain-inliner

use -fgnu89-inline to workaround an old compiler / linker / glibc issue.

support-aesni

allow compilation with AESNI on system and architecture that supports it

support-deepseq

add deepseq instances for cryptographic types

support-pclmuldq

Allow compilation with pclmuldq on architecture that supports it

support-rdrand

allow compilation with RDRAND on system and architecture that supports it

support-sse

Use SSE optimized version of (BLAKE2, ARGON2)

target-attributes

use GCC / clang function attributes instead of global target options.

dev-haskell/cryptonite

integer-gmp

Whether or not to use GMP for some functions

target-attributes

use GCC / clang function attributes instead of global target options.

dev-haskell/dlist

werror

Enable -Werror

dev-haskell/doctest-driver-gen

executable

Build the doctest-driver-gen executable

dev-haskell/entropy

donotgetentropy

Avoid use of the getentropy() *nix function. By default getentropy will be used if detected during compilation (this plays poorly with cross compilation).

halvm

Build for the HaLVM.

dev-haskell/foldable1-classes-compat

tagged

You can disable the use of the `tagged` package using `-f-tagged`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.

dev-haskell/foundation

experimental

Enable building experimental features, known as highly unstable or without good support cross-platform

dev-haskell/glib

closure-signals

Use the the GClosure-based signals implementation.

dev-haskell/gtk2hs-buildtools

closuresignals

Use the the GClosure-based signals implementation.

dev-haskell/hackage-security

lukko

Use @lukko@ for file-locking, otherwise use @GHC.IO.Handle.Lock@

dev-haskell/hashable

random-initial-seed

Randomly initialize the seed on every executable invocation. This is not a security feature and is intended only for testing (it can affect legitimate use cases).

dev-haskell/hashtables

bounds-checking

if on, use bounds-checking array accesses

detailed-profiling

add detailed profiling information to profiled build-depends

dev-haskell/haskeline

terminfo

Use the terminfo package for POSIX consoles.

dev-haskell/hdbc-sqlite3

splitbase

Choose the new smaller, split-up package.

dev-haskell/hslua-cli

executable

Compile `hslua` standalone executable.

dev-haskell/hslua-repl

executable

Compile `luarepl` standalone executable.

dev-haskell/hsyaml

exe

Enable @exe:yaml-test@ component

dev-haskell/http-api-data

text-show

Use text-show library for efficient ToHttpApiData implementations.

dev-haskell/httpd-shed

buildexamples

Build example executables.

dev-haskell/juicypixels

mmap

Enable the file loading via mmap (memory map)

dev-haskell/libyaml

system-libyaml

Use the system-wide libyaml instead of the bundled copy

unicode

Enable unicode output. Otherwise, unicode characters will be escaped.

dev-haskell/lpeg

rely-on-shared-lpeg-library

Do not build lpeg from source, but trust that lpeg is made available in other ways, e.g., through a system-wide installation. The loader will be replaced with a placeholder function that only emits a message.

dev-haskell/lua

system-lua

Use @pkg-config@ to discover library and include paths. Setting this flag implies `pkg-config`.

dev-haskell/markdown-unlit

executable

Build executable

dev-haskell/monad-logger

template-haskell

Enable Template Haskell support

dev-haskell/monad-par

chaselev

Use Chase-Lev Deques for higher-perf work-stealing.

dev-haskell/nats

binary

enable binary instances

hashable

enable hashable instances

template-haskell

enable template_haskell

dev-haskell/network

devel

using tests for developers

dev-haskell/nothunks

bytestring

Provide instances for bytestring

text

Provide instances for text

vector

Provide instances for vector

dev-haskell/pandoc

embed-data-files

Embed data files in binary for relocatable executable.

dev-haskell/parsec-numbers

parsec1

use dev-haskell/parsec1 instead of dev-haskell/parsec

dev-haskell/parsers

attoparsec

You can disable the use of the `attoparsec` package using `-f-attoparsec`.

binary

You can disable the use of the `binary` package using `-f-binary`.

parsec

You can disable the use of the `parsec` package using `-f-parsec`.

dev-haskell/persistent-sqlite

build-sanity-exe

Build a sanity check test executable

dev-haskell/prettyprinter

buildreadme

Build the readme generator

text

While it's a core value of @prettyprinter@ to use @Text@, there are rare circumstances (mostly when @prettyprinter@ arises as a dependency of test suites of packages like @bytestring@ or @text@ themselves) when this is inconvenient. In this case one can disable this flag, so that @prettyprinter@ fallbacks to @String@.

dev-haskell/quickcheck

template-haskell

Build Test.QuickCheck.All, which uses Template Haskell.

dev-haskell/quickcheck-classes

aeson

You can disable the use of the `aeson` package using `-f-aeson`. This may be useful for accelerating builds in sandboxes for expert users.

binary-laws

Include infrastructure for testing class laws of binary type constructors. It is required that this flag match the value that the `unary-laws` flag was given when building `quickcheck-classes-base`. Disabling `unary-laws` while keeping `binary-laws` enabled is an unsupported configuration.

semigroupoids

You can disable the use of the `semigroupoids` package using `-f-semigroupoids`. This may be useful for accelerating builds in sandboxes for expert users.

semirings

You can disable the use of the `semirings` package using `-f-semirings`. This may be useful for accelerating builds in sandboxes for expert users.

unary-laws

Include infrastructure for testing class laws of unary type constructors. It is required that this flag match the value that the `unary-laws` flag was given when building `quickcheck-classes-base`.

vector

You can disable the use of the `vector` package using `-f-vector`. This may be useful for accelerating builds in sandboxes for expert users.

dev-haskell/quickcheck-classes-base

binary-laws

Include infrastructure for testing class laws of binary type constructors. Disabling `unary-laws` while keeping `binary-laws` enabled is an unsupported configuration.

unary-laws

Include infrastructure for testing class laws of unary type constructors.

dev-haskell/random-bytestring

pcg

compile with support for PCG from pcg-random

dev-haskell/sandi

conduit

Build with conduit

dev-haskell/semialign

semigroupoids

Build with semigroupoids dependency

dev-haskell/sha

exe

Build a sha1 and a sha384 executable similar to 'md5sum'.

dev-haskell/shelly

lifted

run the tests against Shelly.Lifted

dev-haskell/simple-sendfile

allow-bsd

Allow use of BSD sendfile (disable on GNU/kFreeBSD)

dev-haskell/skein

big-endian

When manually selecting the endianness, use big-endian (default is little-endian).

force-endianness

Use a manually selected endian when compiling (see flag 'big-endian').

reference

Use the reference implementation instead of the optimized one.

dev-haskell/skylighting

executable

Whether to build the skylighting program

dev-haskell/skylighting-core

executable

Build skylighting-extract tool

dev-haskell/some

newtype-unsafe

Use implementation using @newtype@ and unsafe @Any@, instead of GADT

dev-haskell/splitmix

optimised-mixer

Use JavaScript for mix32

dev-haskell/tasty

clock

Depend on the clock package for more accurate time measurement

dev-haskell/texmath

executable

Compile test executable.

server

Compile webserver.

dev-haskell/text-short

debug

Enable runtime-checks via 'assert'

dev-haskell/tls

compat

Accept SSLv2 client hello for beginning SSLv3 / TLS handshake

network

Use the base network library

dev-haskell/transformers-base

orphaninstances

Build instances for orphan datatypes.

dev-haskell/typst

executable

Compile executable to be used in testing and development.

dev-haskell/unicode-collation

doctests

Run doctests as part of test suite. Use with: @--write-ghc-environment-files=always@.

executable

Build the unicode-collate executable.

dev-haskell/unix-compat

old-time

build against old-time package

dev-haskell/vector

boundschecks

Enable bounds checking

internalchecks

Enable internal consistency checks at the cost of a significant performance penalty

unsafechecks

Enable bounds checking in unsafe operations at the cost of a significant performance penalty

dev-haskell/vector-algorithms

bench

Build a benchmarking program to test vector-algorithms performance

boundschecks

Enable bounds checking

internalchecks

Enable internal consistency checks at the cost of a significant performance penalty.

properties

Enable the quickcheck tests

unsafechecks

Enable bounds checking in unsafe operations at the cost of a significant performance penalty.

dev-haskell/void

safe

dissable effective but unsafe coersions

dev-haskell/wai-app-static

print

print debug info.

dev-haskell/warp

allow-sendfilefd

Allow use of sendfileFd (not available on GNU/kFreeBSD)

x509

Adds a dependency on the x509 library to enable getting TLS client certificates.

dev-haskell/wcwidth

cli

Enable command line tool

dev-haskell/yaml

executable

Install the yaml2json and json2yaml executables

dev-haskell/yesod-form

network-uri

Get Network.URI from the network-uri package

dev-haskell/zip-archive

executable

Build the Zip executable.

dev-haskell/zlib

bundled-c-zlib

Use the bundled zlib C sources. Requires pkg-config to be False. For windows, this is the default.

non-blocking-ffi

The (de)compression calls can sometimes take a long time, which prevents other Haskell threads running. Enabling this flag avoids this unfairness, but with greater overall cost.

dev-java/ant

antlr

Enable ANTLR Ant tasks

bcel

Enable bcel (bytecode manipulation) Ant tasks

bsf

Enable support for Apache Bean Scripting Framework (dev-java/bsf)

commonslogging

Enable commons-logging Ant tasks

commonsnet

Enable commons-net Ant tasks

imageio

Enable imageio Ant tasks

jai

Enable JAI (Java Imaging) Ant task

jakartamail

Enable Jakartamail Ant task

javamail

Enable JavaMail Ant task

jdepend

Enable Jdepend Ant tasks

jmf

Enable JMF (Java Media Framework) Ant tasks

jsch

Disable Jsch (ssh, scp and related) Ant tasks

junit

Enable JUnit Ant tasks

junit4

Enable JUnit4 Ant tasks

junitlauncher

Enable JUnit5 Ant tasks

log4j

Enable Apache log4j Ant tasks

oro

Enable Apache Oro Ant tasks

regexp

Enable Apache Regexp Ant tasks

resolver

Enable Apache Resolver Ant tasks

swing

Enable Swing Ant tasks

testutil

Enable optional test util classes

xalan

Enable Apache Xalan2 Ant tasks

xz

Enable XZ Ant tasks

dev-java/commons-logging

log4j

Add optional support for log4j

dev-java/dom4j

jaxen

Includes org.jaxen.dom4j package

dev-java/emma

launcher

Install /usr/bin/emma. Collides with sci-biology/emboss.

dev-java/java-config

compat

Install bin/java-config-2 symlink pointing to java-config

dev-java/javacup

ant-task

Build and register the ant-task

dev-java/jaxen

dom4j

Includes org.jaxen.dom4j package

jdom

Includes org.jaxen.jdom package

xom

Includes org.jaxen.xom package

dev-java/jflex

ant-task

Build and register the ant-task

dev-java/junit

migration-support

Include the junit-jupiter-migrationsupport module, which helps with migration from JUnit 4 to JUnit Jupiter

suite

Include the JUnit Platform Suite Engine, which adds test suite support

vintage

Include JUnit Vintage, which allows JUnit 5 to run JUnit 3 and JUnit 4 tests

dev-java/openjdk

headless-awt

Don't install the X backend for AWT, needed by some GUIs

javafx

Import OpenJFX modules at build time, via dev-java/openjfx

jbootstrap

Build OpenJDK twice, the second time using the result of the first

source

Install JVM sources

system-bootstrap

Bootstrap using installed openjdk

systemtap

Enable SystemTap/DTrace tracing

dev-java/openjdk-bin

headless-awt

Don't install the X backend for AWT, needed by some GUIs (used to be X flag)

source

Install JVM sources

dev-java/openjdk-jre-bin

headless-awt

Don't install the X backend for AWT, needed by some GUIs (used to be X flag)

dev-java/openjfx

media

Compile media module, based on gstreamer-minimal (does not pull gstreamer)

source

Install JavaFX sources

dev-java/pdfbox

tools

Build and install pdfbox-tools

dev-java/protobuf-java

system-protoc

Use protoc provided by dev-libs/protobuf

dev-java/qdox

ant-task

Build the ant-task

dev-java/rxtx

lfd

Installs and uses LockFileServer daemon (lfd)

dev-java/saxon

ant-task

BUILD and register the ant-task

dev-java/sbt

binary

Install from (Gentoo-compiled) binary instead of building from sources. Set this when you run out of memory during build.

dev-lang/algol68g

mpfr

Add support for multiprecision floating point rouding

dev-lang/ammonite-repl-bin

scala2-13

Install Ammonite for Scala 2.13

scala3-0

Install Ammonite for Scala 3.0

scala3-1

Install Ammonite for Scala 3.1

scala3-2

Install Ammonite for Scala 3.2

dev-lang/bas

lr0

Use the LR0 parser instead of the recursive descending parser

dev-lang/crystal

debug

Build each module as a separate object file. Speeds build up.

dev-lang/erlang

kpoll

Enable kernel polling support

dev-lang/gdl

eigen

Build matrix manipulation with dev-cpp/eigen

glpk

Use GNU Linear Programming Kit sci-mathematics/glpk

gshhs

Add support for projection adn continent maps with sci-geosciences/gshhs-data

hdf

Add support for the Hierarchical Data Format v.4

proj

Add support for sci-libs/proj (geographic projections)

shapelib

Add support for manipulating ESRI Shapefiles with sci-libs/shapelib

udunits

Add support for manipulating units of physical quantities

dev-lang/gforth

check

Enable build-time sanity check.

dev-lang/ghc

binary

Install the binary version directly, rather than using it to build the source version.

elfutils

Enable DWARF-based backtraces using dev-libs/elfutils.

ghcbootstrap

Internal: Bootstrap GHC from an existing GHC installation.

ghcmakebinary

Internal: Build binary friendly for redistribution.

gmp

Use dev-libs/gmp for integer operations (works faster, but an external depend).

llvm

Pull in dependencies for the sys-devel/llvm codegen backend.

numa

Enable NUMA thread balancing policy using sys-process/numactl.

unregisterised

Create an unregisterised build in which only the C codegen backend will be available.

dev-lang/gnat-gpl

ada

Build the ADA language (GNAT) frontend

cet

Enable support for Intel Control Flow Enforcement Technology (CET)

d

Enable support for the D programming language

default-stack-clash-protection

Build packages with stack clash protection on by default

default-znow

Request full relocation on start from ld.so by default

fixed-point

Enable fixed-point arithmetic support for MIPS targets in gcc (Warning: significantly increases compile time!)

go

Build the GCC Go language frontend.

graphite

Add support for the framework for loop optimizations based on a polyhedral intermediate representation

libssp

Build SSP support into a dedicated library rather than use the code in the C library (DO NOT ENABLE THIS IF YOU DON'T KNOW WHAT IT DOES)

modula2

Build the GCC Modula-2 language frontend.

objc

Build support for the Objective C code language

objc++

Build support for the Objective C++ language

objc-gc

Build support for the Objective C code language Garbage Collector

pgo

Build GCC using Profile Guided Optimization (PGO)

rust

Build support for the Rust language, installs gccrs.

sanitize

Build support for various sanitizer functions (ASAN/TSAN/etc...)

ssp

Build packages with stack smashing protector on by default

system-bootstrap

Bootstrap using installed Ada compiler

systemtap

enable systemtap static probe points

vtv

Build support for virtual table verification (a C++ hardening feature)

dev-lang/gnucobol

json

Enable support for JSON template formatting via dev-libs/json-c

dev-lang/idris2

chez

build using dev-scheme/chez

racket

build using dev-scheme/racket

test-full

pull in depedndencies to run all tests

dev-lang/inform

tools

Install blorbtools for manipulating Blorb files

dev-lang/ispc

gpu

Enable Level0 GPU support in ispcrt.

openmp

Build with OpenMP task model (otherwise, TBB task model is used).

dev-lang/janet

static-libs

install janet static library archive, you must enable this flag for using `jpm build`

dev-lang/jerryscript

debugger

Install jerry-debugger

dev-lang/jsonnet

custom-optimization

Build with user-specified compiler optimizations (-Os, -O0, -O1, -O2, -O3) from CFLAGS (unsupported)

dev-lang/lazarus

extras

Build a lot of extra packages, including lhelp chm viewer program.

gtk2

Use gtk:2 for widgets.

gui

Build GUI IDE.

minimal

Don't build extra packages from the bigide component

dev-lang/logtalk

fop

Support for generating pdf documentation using fop

xslt

Support for generating html documentation using xslt

dev-lang/lua

deprecated

make deprecated data structures/routines available

dev-lang/luajit

lua52compat

Enable some upwards-compatible features from Lua 5.2 that are unlikely to break existing code.

dev-lang/mercury

trail

Support Mercury trail grades

dev-lang/mercury-extras

tommath

Enable support for tommath library

dev-lang/mlton

binary

install a binary version

bootstrap-smlnj

Boostrap mlton with dev-lang/smlnj (takes a long time)

pax-kernel

Enable if the user plans to run the package under a pax enabled hardened kernel

stage3

After bootstrap building mlton with dev-lang/smlnj, rebuild mlton with the second stage build of mlton (recommended).

dev-lang/moarvm

asan

Enable clang's Address Sanitizer functionality. Expect longer compile time.

clang

Use clang compiler instead of GCC

jit

Enable Just-In-Time-Compiler. Has no effect except on AMD64 and Darwin.

optimize

Enable optimization via CFLAGS

ubsan

Enable clang's Undefined Behavior Sanitizer functionality. Expect longer compile time.

dev-lang/mono

pax-kernel

Enable if the user plans to run the package under a pax enabled hardened kernel

xen

Make mono generate code that is considerably faster on xen VMs but slightly slower on for normal systems.

dev-lang/neko

apache

Build Apache modules

dev-lang/nim

test-js

Enable tests that require Node.js

dev-lang/nqp

clang

Toggle usage of the clang compiler in conjunction with MoarVM

moar

Build the MoarVM backend (experimental/broken)

dev-lang/ocaml

flambda

Enables the Flambda optimizer: A new intermediate representation (introduced in ocaml 4.03) in the depths of the compiler designed to allow for better inlining.

spacetime

Enables the Spacetime memory profiler. See https://caml.inria.fr/pub/docs/manual-ocaml/spacetime.html for more information.

dev-lang/php

apparmor

Support FPM application confinement through sys-libs/libapparmor

argon2

Enable password hashing algorithm from app-crypt/argon2

bcmath

Enable the BCMath Arbitrary Precision Mathematics extension

capstone

Support opcache JIT disassembly through dev-libs/capstone

cli

Enable the Command-Line Interface (CLI) SAPI

coverage

Include gcov symbols for test coverage and lcov reports. Only useful for extension developers, and requires GCC.

ctype

Enable the Character type checking (ctype) extension

embed

Enable embed SAPI

enchant

Enable the Enchant spelling library extension using app-text/enchant

ffi

Enable the Foreign Function Interface (FFI) extension using dev-libs/libffi

fileinfo

Enable the File Information extension

filter

Enable the Data Filtering extension

flatfile

Add dbm support for flat files

fpm

Enable the FastCGI Process Manager SAPI

gd

Enable the Image Processing and GD extension (requires media-libs/libjpeg-turbo and media-libs/libpng)

inifile

Add dbm support for .ini files

intl

Enables the intl extension for extended internalization support

ipv6

Support IPv6 connectivity in fopen and friends, and v6 address conversions in functions like inet_pton and inet_ntop.

jit

Enable PCRE JIT support

ldap-sasl

Add SASL support for the PHP LDAP extension using dev-libs/cyrus-sasl

lmdb

Enable support for dev-db/lmdb db backend

opcache

Enables built-in opcode cache, replacing pecl-apc et al.

opcache-jit

Enable Just In Time (JIT) compilation within the opcache extension

pcntl

Enable the Process Control extension

pdo

Enable the PHP Data Objects extension

phar

Enables the phar extension to provide phar archive support

phpdbg

Enable the PHP Debug Command Line SAPI (like gdb for php)

session-mm

Include dev-libs/mm support for session storage

sharedmem

Enable the shmop extension

simplexml

Enable the SimpleXML extension

sodium

Enable support for crypto through dev-libs/libsodium

sysvipc

Enable the PHP System-V semaphore, shared memory and IPC extension

tokenizer

Add support for the PHP file parser

tokyocabinet

Enable support for dev-db/tokyocabinet db backend

xmlreader

Enable the XMLReader extension

xmlwriter

Enable the XMLWriter extension

xslt

Build the XSL extension

dev-lang/polyml

portable

Build the portable interpreter version of Poly/ML instead of native

dev-lang/python

bluetooth

Build Bluetooth protocol support in socket module

ensurepip

Install the ensurepip module that uses bundled wheels to bootstrap pip and setuptools (if disabled, it will be only possible to use venv `--without-pip`)

gil

Build with Global Interpreter Lock. Disable to use the experimental freethreading mode.

jit

Enable experimental Just-In-Time compilation support.

libedit

Link readline extension against dev-libs/libedit instead of sys-libs/readline

pgo

Optimize the build using Profile Guided Optimization (PGO) by running Python's test suite and collecting statistics based on its performance. This will take longer to build.

valgrind

Disable pymalloc when running under dev-debug/valgrind is detected (may incur minor performance penalty even when valgrind is not used)

wininst

Install Windows executables required to create an executable installer for MS Windows

dev-lang/python-exec

native-symlinks

Install generic symlinks like python and python3. If this flag is disabled, only versioned python3.X executables will be available to end users and ebuilds not using python eclasses.

dev-lang/qu-prolog

pedro

Pedro subscription/notification communications system

dev-lang/R

libdeflate

Use app-arch/libdeflate rather than sys-libs/zlib for lazy-loaded R objects.

dev-lang/rakudo

clang

Use Clang to compile the MoarVM backend

moar

Use the MoarVM as backend

dev-lang/ruby

rdoc

Install dev-ruby/rdoc after installing Ruby.

systemtap

Enable SystemTap/DTrace tracing

dev-lang/rust

clippy

Install clippy, Rust code linter

dist

Install dist tarballs (used for bootstrapping)

miri

Install miri, an interpreter for Rust's mid-level intermediate representation (requires USE=nightly, sometimes is broken)

nightly

Enable nightly (UNSTABLE) features (NOTE: it does not install nightly version, just enables features marked as nightly at time of release)

parallel-compiler

Build a multi-threaded rustc (experimental, not tested by upstream)

profiler

Build the profiler runtime and rust-demangler tool (needed for '-C profile-generate' or '-C instrument-coverage' codegen opts)

rust-analyzer

Install rust-analyzer, A Rust compiler front-end for IDEs (language server)

rustfmt

Install rustfmt, Rust code formatter

rust-src

Install rust-src, needed by developer tools and for build-std (cross)

system-bootstrap

Bootstrap using installed rust compiler

system-llvm

Use the system LLVM installation

wasm

Build support for the wasm32-unknown-unknown target

dev-lang/rust-bin

clippy

Install clippy, Rust code linter

profiler

Build the profiler runtime and rust-demangler tool (needed for '-C profile-generate' or '-C instrument-coverage' codegen opts)

rust-analyzer

Install rust-analyzer, A Rust compiler front-end for IDEs (language server)

rustfmt

Install rustfmt, Rust code formatter

rust-src

Install rust-src, needed by developer tools and for build-std (cross)

dev-lang/souffle

ffi

Support c++ functors with arbitrary number of arguments

swig

Enable SWIG usage, needed for Java and Python bindings

dev-lang/spidermonkey

clang

Use Clang compiler instead of GCC

debug

Enable assertions to allow for easier debugging of programs that link to spidermonkey -- note this will often crash software on regular end-user systems

dev-lang/swig

ccache

build ccache-swig(a fast compiler cache)

dev-lang/swi-prolog

archive

Use libarchive for extension packs

cli

Add support for CLI interfaces based on readline and libedit

ipc

Add support for TIPC inter-process communication

pgo

Optimize the build using Profile Guided Optimization (PGO)

yaml

Use libyaml for YAML pack

dev-lang/vala

valadoc

Installs valadoc documentation generation tool

dev-lang/xsb

mariadb

Enable support for the mariadb database backend

dev-lang/yap

R

Enable support for connecting R to Prolog

raptor

Enable support for Raptor RDF syntax libarary

dev-lang/zig

llvm

Build with LLVM backend and extensions enabled.

dev-libs/aml

examples

Build and install examples

dev-libs/antlr-c

debugger

Compiles debug info into the library

dev-libs/apache-arrow

compute

Build the Arrow Compute Modules

dataset

Build the Arrow Dataset Modules

json

Enables read/write json format

parquet

Enables read/write parquet data format

re2

Build with support for regular expressions using the re2 library

dev-libs/appstream

apt

Enables Debians APT support

dev-libs/appstream-glib

fonts

Enable fonts support for appstream-builder.

stemmer

Add word stemming via dev-libs/snowball-stemmer.

dev-libs/apr

old-kernel

Enable compatibility with older kernels

urandom

Use /dev/urandom instead of /dev/random

dev-libs/apr-util

nss

Install apr_crypto_nss module

openssl

Install apr_crypto_openssl module

dev-libs/atcore

gui

Build test GUI

dev-libs/bitset

tcmalloc

Use tcmalloc from dev-util/google-perftools for allocations

dev-libs/boehm-gc

large

optimize for large heap size (also increases max root sets)

dev-libs/boost

context

Build and install the Boost.Context (and Boost.Fiber) library and all other Boost libraries that depend on it

debug

Build and install only the debug version of the Boost libraries. Only enable this flag if you're developing against boost.

doc

Install the full API documentation documentation. This takes over 200MB of extra disk space.

nls

Build libboost_locale. This library requires compatible C library interfaces, which might not be provided by uClibc or other embedded libraries.

numpy

Optionally build NumPy extensions when Boost.Python is enabled

stacktrace

Build the full Boost.Stacktrace dynamic library instead of relying on the header-only implementation

tools

Build and install the boost tools (bcp, quickbook, inspect, wave)

dev-libs/botan

boost

Use dev-libs/boost

tools

Install optional tools for e.g. hashing

dev-libs/check

subunit

Enable support for the subunit unit test protocol

dev-libs/cyberjack

tools

Build and install optional management tools.

dev-libs/cyrus-sasl

authdaemond

Add Courier-IMAP authdaemond unix socket support (net-mail/courier-imap, mail-mta/courier)

ldapdb

Enable ldapdb plugin

openldap

Add ldap support for saslauthd

sample

Enable sample client and server

srp

Enable SRP authentication

urandom

Use /dev/urandom instead of /dev/random

dev-libs/date

only-c-locale

Build only the C locale

dev-libs/dbus-c++

ecore

Use Ecore integration

glib

Use glib integration

dev-libs/eekboard

libcanberra

Enable support for media-libs/libcanberra

xtest

Enable support for x11-libs/libXtst

dev-libs/efl

bmp

Enable WBMP image loader

dds

Enable DDS image loader

drm

Enable DRM engine

eet

Enable Eet image loader

efl-one

Combine multiple core libraries into one libefl.so

fribidi

Enable bidirectional text support

glib

Enable dev-libs/glib support

harfbuzz

Enable complex text shaping and layout support

hyphen

Enable text hyphenation support

ibus

Enable Intelligent Input Bus

ico

Enable Ico image loader

json

Enable lottie animation support

mono

Enable mono bindings

physics

Enable Bullet physics effects and support

pmaps

Enable PMAPS image loader

psd

Enable PSD image loader

scim

Enable Smart Common Input Method

system-lz4

Use system liblz4 instead of bundled one

tga

Enable Tga image loader

tgv

Enable Tgv image loader

tslib

Enable x11-libs/tslib for touchscreen events

unwind

Enable debug support via sys-libs/libunwind

xcf

Enable XCF image loader

xim

Enable X Input Method

xpresent

Enable x11-libs/libXpresent support

dev-libs/elfutils

debuginfod

Enable debuginfod support, both the debuginfod server and the libdebuginfod client library

lzma

Support automatic decompression of LZMA-compressed files and kernel images

utils

Install command-line utilities (all the eu-* programs)

dev-libs/fcgi

html

Install HTML documentation

dev-libs/folks

telepathy

Load contacts from the Telepathy framework

utils

Build the folks-inspect utility

dev-libs/fstrm

utils

Build fstrm utility programs

dev-libs/gf2x

custom-tune

Extra long compile time for tuning hardware specific low-level routines

fft

Build an FFT API for multiplication of 2 polynomials over GF(2)

dev-libs/gjs

sysprof

Enable profiling data capture support using dev-util/sysprof-capture

dev-libs/glib

dbus

Enable dependencies required by glib libraries using dbus service to manage settings saving

elf

Enable support for listing and extracting from ELF resource files with gresource tool

introspection

Enable generating introspection data (requires dev-libs/gobject-introspection )

mime

Pull in shared MIME database that many glib-based applications require at runtime to detect or open files. Warning: do not disable this flag unless installing on a headless server.

sysprof

Enable profiling data capture support using dev-util/sysprof-capture

systemtap

Build support for profiling and tracing using dev-debug/systemtap

utils

Install gtester-report utility to generate test report files for your software; build gresource utility with ELF support.

dev-libs/gmime

smime

Enable experimental S/MIME support

dev-libs/gmp

cpudetection

Enables runtime CPU detection (useful for binpkgs, compatibility on other CPUs). This only works on amd64/x86 at present. If this flag is enabled, GMP will work on a variety of amd64/x86 CPUs and load accelerated routines for use at runtime depending on the CPU in use. This makes it suitable for binary packages (binpkgs). If this flag is disabled, GMP will be tuned for the CPU being used at build-time and may not be usable on other machines.

pic

Force static libraries to be built as PIC to avoid TEXTRELs.

dev-libs/gobject-introspection

doctool

Install g-ir-doc-tool for generating documentation from introspected data

dev-libs/hiredict

shim

Install header shims for the hiredis api.

dev-libs/imath

large-stack

Enables code to take advantage of large stack support

dev-libs/input-pad

eekboard

Enable support for dev-libs/eekboard

xtest

Enable support for x11-libs/libXtst

dev-libs/intel-compute-runtime

l0

Install the oneAPI Level Zero driver alongside the OpenCL one

vaapi

Support the sharing of surfaces with Video Acceleration API (OpenCL Extension #36)

dev-libs/jemalloc

lazy-lock

Enable lazy locking (only lock when multi-threaded)

prof

Enable allocation profiling

stats

Enable statistics calculation/reporting

xmalloc

Add support for xmalloc (abort-on-out-of-memory)

dev-libs/json-glib

nls

Enable native language support (translations)

dev-libs/kreport

marble

Enable displaying of maps using kde-apps/marble

scripting

Support Qml scripting using dev-qt/qtdeclarative

dev-libs/ktextaddons

designer

Build plugins for dev-qt/designer

dev-libs/libbase58

tools

Build command line base58 tool

dev-libs/libbytesize

tools

Build bscalc python CLI tool

dev-libs/libcdio

minimal

Only build the libcdio library and little more, just to be used to link against from multimedia players. With this USE flag enabled, none of the command-line utilities are built, nor is the CDDA library.

dev-libs/libcec

cubox

Enable support for enable support for the TDA995x

exynos

Enable support for Exynos chipsets

kernel-cec

Enable support for Linux kernel CEC framework

raspberry-pi

Enable support for the Raspberry Pi

tools

Enable build of cec-client and other test and demo executable tools

udev

Enable detection of USB-CEC port by udev

xrandr

Enable detection of active HDMI using xrandr extensions

dev-libs/libcgroup

daemon

Install the configuration tools and init/config files.

tools

Install the cgroup rules processing daemon and init/config files.

dev-libs/libclc

spirv

Build SPIRV targets

dev-libs/libdbusmenu

gtk

Enable support for GTK+2

gtk3

Enable support for GTK+3

dev-libs/libdex

eventfd

Allow use of eventfd

liburing

Allow use of liburing (io_uring)sys-libs/liburing

sysprof

Enable profiling data capture support using dev-util/sysprof-capture

dev-libs/libevent

clock-gettime

Disable use of clock_gettime even if it is available

debug

Support for running in debug mode

malloc-replacement

Support for replacing the memory management functions

mbedtls

Support for net-libs/mbedtls encryption

ssl

Support for dev-libs/openssl encryption

verbose-debug

Support for verbose debug logging

dev-libs/libffi

exec-static-trampoline

Don't rely on dynamic code generation for trampolines.

pax-kernel

Use PaX emulated trampolines, for we can't use PROT_EXEC

dev-libs/libffi-compat

pax-kernel

Use PaX emulated trampolines, for we can't use PROT_EXEC

dev-libs/libfido2

nfc

Enable experimental NFC support

dev-libs/libflatarray

cuda

Enables plugins for NVIDIA GPUs (e.g. CUDAAllocator)

dev-libs/libgcrypt

getentropy

Use getentropy function to obtain randomness from the kernel

dev-libs/libgdata

crypt

Use app-crypt/gcr for keeping tokens and passwords in non-pageable memory for improved security

gnome-online-accounts

Enable net-libs/gnome-online-accounts support

dev-libs/libgit2

gssapi

Enable GSSAPI support for SPNEGO auth

ssh

Enable SSH transport support

trace

Enable tracing support

dev-libs/libgit2-glib

ssh

Enable SSH transport support

dev-libs/libgpg-error

common-lisp

Install common-lisp files

dev-libs/libgpiod

tools

Build some useful gpio tools that use libgpiod.

dev-libs/libical

glib

Enable dev-libs/glib interface support

dev-libs/libisoburn

external-filters

Allow the use of external processes as file content filters (Note: this is a potential security risk)

external-filters-setuid

Also allow the use of external setuid processes as file content filters (Note: this is a potential security risk)

frontend-optional

Use dev-tcltk/bwidget which is not strictly required for the frontend

launch-frontend

Enable the tcl gui for xorriso

launch-frontend-setuid

Enable the tcl gui for xorriso under setuid

dev-libs/libisofs

verbose-debug

Enable verbose debug messages

dev-libs/libjcat

ed25519

Enable ED25519 verification support via dev-libs/nettle and net-libs/gnutls

gpg

Enable GPG verification support via app-crypt/gpgme

pkcs7

Enable PKCS7 verification support via net-libs/gnutls

dev-libs/libjwt

openssl

Use openssl libs for crypto functions

dev-libs/liblogging

rfc3195

Enables RFC 3195 protocol (aka syslog-reliable) support. If you don't know what this is, you don't need it!

stdlog

Enables liblogging's core component (think of it as a the next version of the syslog(3) API).

dev-libs/libmemcached

hsieh

Use Hsieh hash algorithm.

libevent

Use the libevent event loop interface.

sasl

Use sasl auth for communications.

dev-libs/libmemcached-awesome

libevent

Use the libevent event loop interface.

sasl

Use sasl auth for communications.

dev-libs/libnfc

pcsc-lite

Enable NFC drivers that require pcsc-lite

dev-libs/libnl

python

Install experimental dev-lang/python bindings

utils

Install command line interface utils

dev-libs/liborcus

spreadsheet-model

Enable the spreadsheet model implementation

tools

Build various low-level parsers

dev-libs/libowfat

diet

Compile against dev-libs/dietlibc

dev-libs/libp11

doc

Generate and install API documentation for the package.

dev-libs/libpcre

bzip2

Add support for pcregrep command to search within bzip2-compressed files (via app-arch/bzip2).

pcre16

Build PCRE library for 16 bit characters (e.g. UTF-16).

pcre32

Build PCRE library for 32 bit characters (e.g. UTF-32).

readline

Add support for command line editing to pcretest, through sys-libs/readline.

zlib

Add support for pcregrep command to search within gzip-compressed files (via sys-libs/zlib).

dev-libs/libpcre2

bzip2

Add support for pcregrep command to search within bzip2-compressed files (via app-arch/bzip2).

pcre16

Build PCRE library for 16 bit characters (e.g. UTF-16).

pcre32

Build PCRE library for 32 bit characters (e.g. UTF-32).

readline

Add support for command line editing to pcretest, through sys-libs/readline.

zlib

Add support for pcregrep command to search within gzip-compressed files (via sys-libs/zlib).

dev-libs/libpeas

glade

Install the glade catalog

python

Build support for loading dev-lang/python plugins

dev-libs/libpy

sparsehash

Include libpy wrappers for dev-cpp/sparsehash

dev-libs/librdkafka

lz4

Enable support for Kafka's LZ4 compression based on KIP-57 (uses app-arch/lz4)

dev-libs/librelp

gnutls

Use GnuTLS

openssl

Use OpenSSL

dev-libs/libsecp256k1

ecdh

Enable ECDH shared secret computation

ellswift

Enable ElligatorSwift encoding for public keys

endomorphism

Enable endomorphism

experimental

Allow experimental USE flags

extrakeys

Enable extrakeys module

lowmem

Reduce runtime memory usage at the expense of performance (ecmult window size 4, gen precision 2)

recovery

Enable ECDSA pubkey recovery module

schnorr

Enable Schnorr signature module

test-openssl

Enable OpenSSL comparison tests

dev-libs/libslz

tools

Install additional tools (zenc, zdec)

dev-libs/libsodium

urandom

Use /dev/urandom instead of /dev/random

dev-libs/libtermkey

demos

Install demos, which pulls in dev-libs/glib

dev-libs/libtomcrypt

libtommath

Uses dev-libs/libtommath for mathematical operations

tomsfastmath

Uses dev-libs/tomsfastmath for mathematical operations

dev-libs/libucl

regex

Enable regex support

sign

Enable signatures check

urls

Enable URLs fetch

utils

Install utils for checking other configs

dev-libs/libunibreak

doc

Install html API documentation.

dev-libs/libverto

glib

Support event loops using dev-libs/glib

libev

Support event loops using dev-libs/libev

libevent

Support event loops using dev-libs/libevent

dev-libs/libvoikko

expvfst

Enable experimental features of VFST morphology backend

hfst

Enable HFST morphology backend

dev-libs/libxlsxwriter

openssl

Use dev-libs/openssl for MD5 digest

dev-libs/libxmlb

stemmer

Enable language stemming support

dev-libs/libzia

ftdi

Enable support for FTDI USB chips

dev-libs/libzip

mbedtls

Use net-libs/mbedtls as TLS provider

tools

Install binary tools to compare, modify and merge zip files

dev-libs/link-grammar

aspell

Adds support for app-text/aspell spell checker

hunspell

Adds support for app-text/hunspell spell checker

dev-libs/log4cplus

explicit-initialization

Require explicit initialization

iconv

Use inconv for wchar_t <-> char conversions. See also log4cplus's unicode.txt documentation

server

Build the logging server

dev-libs/log4cxx

smtp

Offer SMTP support via net-libs/libesmtp

dev-libs/m17n-lib

anthy

Enable support for app-i18n/anthy input method

athena

Enable the MIT Athena widget set (x11-libs/libXaw)

gd

Build API and utilities based on media-libs/gd. This flag is only meaningful if the X USE flag is also enabled

libotf

Use dev-libs/libotf to handle OpenType fonts

libxml2

Use dev-libs/libxml2 to parse XML

X

Build the Graphical User Interface API and utilities

dev-libs/mimalloc

hardened

Enable exploit mitigations

dev-libs/modsecurity

fuzzyhash

Support fuzzy hash computations (to detect malware, for example) using the app-crypt/ssdeep package.

geoip2

Pull in dev-libs/libmaxminddb for use by the SecGeoLookupDb directive.

json

Suppose JSON in the request body parser through dev-libs/yajl.

lmdb

Add LMDB backend support

pcre2

Use dev-libs/libpcre2 as regex implementation

dev-libs/ncnn

tools

Enable installation of various tools in addition to the library

dev-libs/nss

cacert

Include root/class3 certs from CAcert (https://www.cacert.org/)

test-full

Run all available tests, instead of the standard set only

utils

Compile and install all extra binaries, such as certutil, modutil and few more

dev-libs/nwjs

ffmpeg-chromium

Use Chromium FFmpeg fork (media-video/ffmpeg-chromium) rather than mainline FFmpeg (media-video/ffmpeg)

dev-libs/oneDNN

cblas

Use virtual/cblas for sgemm routines

mkl

Use sci-libs/mkl for sgemm routines

dev-libs/onigmo

combination-explosion-check

enable combination explosion check

crnl-as-line-terminator

enable CR+NL as line terminator

dev-libs/oniguruma

crnl-as-line-terminator

Enable CR+NL as line terminator

dev-libs/opencryptoki

tpm

Enable support for Trusted Platform Module (TPM) using app-crypt/trousers

dev-libs/openct

debug

Add debug output to the driver library for pcsc-lite.

pcsc-lite

Build a driver library for sys-apps/pcsc-lite, providing PC/SC API access to devices supported by OpenCT.

dev-libs/openobex

irda

Enable IrDA support

dev-libs/opensc

ctapi

Use CT-API for accessing Smartcard hardware

notify

Enable notifications

openct

Use dev-libs/openct (and CT-API) for accessing Smartcard hardware

pace

Use dev-libs/openpace for EAC version 2 support

pcsc-lite

Use sys-apps/pcsc-lite (and PC/SC API) for accessing Smartcard hardware

secure-messaging

Enable secure messaging

dev-libs/openssl

bindist

Disable/Restrict EC algorithms (as they seem to be patented) -- note: changes the ABI

fips

Enable FIPS provider

ktls

Enable support for Kernel implementation of TLS (kTLS)

quic

Enable support for QUIC (RFC 9000); a UDP-based protocol intended to replace TCP

rfc3779

Enable support for RFC 3779 (X.509 Extensions for IP Addresses and AS Identifiers)

sslv2

Support for the old/insecure SSLv2 protocol -- note: not required for TLS/https

sslv3

Support for the old/insecure SSLv3 protocol -- note: not required for TLS/https

tls-compression

Enable support for discouraged TLS compression

tls-heartbeat

Enable the Heartbeat Extension in TLS and DTLS

weak-ssl-ciphers

Build support for SSL/TLS ciphers that are considered "weak"

dev-libs/openssl-compat

bindist

Disable/Restrict EC algorithms (as they seem to be patented) -- note: changes the ABI

rfc3779

Enable support for RFC 3779 (X.509 Extensions for IP Addresses and AS Identifiers)

sslv2

Support for the old/insecure SSLv2 protocol -- note: not required for TLS/https

sslv3

Support for the old/insecure SSLv3 protocol -- note: not required for TLS/https

tls-compression

Enable support for discouraged TLS compression

tls-heartbeat

Enable the Heartbeat Extension in TLS and DTLS

weak-ssl-ciphers

Build support for SSL/TLS ciphers that are considered "weak"

dev-libs/optix

headers-only

Download and install only the header files

dev-libs/pkcs11-helper

nss

Enable NSS crypto engine

dev-libs/pocl

accel

Enable the generic hardware accelerator device driver

conformance

Ensures that certain build options which would result in non-conformant pocl build stay disabled. Note that this does not quarantee a fully conformant build of pocl.

float-conversion

When enabled, OpenCL printf() call's f/e/g formatters are handled by pocl. When disabled, these are handled by system C library.

hardening

Enable hardening against various attacks. May worsen performance

hwloc

Enable hwloc support

memmanager

Enables custom memory manager. Except for special circumstances, this should be disabled

dev-libs/poco

7z

Add Support for the 7z archive format

activerecord

Add ActiveRecord support

cppparser

Build and install a minimal C++ parser

data

Database abstraction layer to easily send/retrieve data to/from various databases

file2pagecompiler

Utility to convert ordinary files to Page Compiler source files

json

Add JSON support

jwt

Add JSON Web Token support

mariadb

Prefer dev-db/mariadb-connector-c over dev-db/mysql-connector-c

mongodb

Add dev-db/mongodb support

net

Classes to write network clients & servers

pagecompiler

Simple compiler translating HTML pages containing embedded C++ code into HTTPRequestHandler classes

pocodoc

POCO documentation generator

prometheus

Add prometheus monitoring system support

ssl

Encryption and digital signing classes

util

Several utility classes (like logger, timer, config file parser)

zip

Add support for the zip & gz archive formats

dev-libs/ppl

cdd

Build the ppl_lcdd program for vertex/facet enumeration accepting the same input format as the programs shipped with sci-libs/cddlib and sci-libs/lrslib

lpsol

Build the ppl_lpsol linear program solver that uses sci-mathematics/glpk for its input routines

dev-libs/protobuf

conformance

Build conformance tests

libprotoc

Build libprotoc

libupb

Build libupb

protobuf

Build protobuf libraries and protoc compiler

protoc

Build libprotoc and protoc compiler

dev-libs/qcoro

network

Build dev-qt/qtbase network support

qml

Enable QML/QtQuick support via dev-qt/qtdeclarative

websockets

Build dev-qt/qtwebsockets support

dev-libs/qcoro5

network

Build dev-qt/qtnetwork support

qml

Enable QML/QtQuick support via dev-qt/qtdeclarative

testlib

Install coroutine-friendly versions of dev-qt/qttest macros

websockets

Build dev-qt/qtwebsockets support

dev-libs/qhotkey

qt6

Use Qt6 dependencies

dev-libs/quazip

qt5

Build with Qt5 support

qt6

Build with Qt6 support

dev-libs/raft

zfs

ZFS support

dev-libs/re2

benchmark

Build a benchmark binary, install it as re2-bench

test-full

Run additional, quite slow tests

dev-libs/rocksdb

numa

Enable NUMA support

tbb

Enable support for dev-cpp/tbb

dev-libs/sentry-native

breakpad

Use dev-util/breakpad as the crash handler

curl

Enable support for automated uploading of crash reports

dev-libs/serd

tools

Build command line utilities

dev-libs/serdisplib

tools

Build optional tools.

dev-libs/sexpp

cli

Build sexp console application

dev-libs/simdjson

all-impls

Enable all implementations rather than only onem

tools

Build and install extra command line tools

dev-libs/softhsm

gost

Enable gost algorithm

migration-tool

Build db migration tool

dev-libs/sord

tools

Build command line utilities

dev-libs/starpu

gcc-plugin

Enable GCC extension plugin (experimental)

spinlock-check

Enable spinlock check

dev-libs/thrift

libevent

Build support for dev-libs/libevent

dev-libs/tinyxml

stl

Compile with TIXML_USE_STL support

dev-libs/tntnet

server

Enable tntnet server daemon

dev-libs/totem-pl-parser

archive

Enables ISO detection with app-arch/libarchive

crypt

Support AmazonAMZ decoding with dev-libs/libgcrypt

uchardet

Enable charset discovery via app-i18n/uchardet

dev-libs/tre

agrep

Build agrep tool

alloca

Enable if you want TRE to use alloca() instead of malloc() when allocating memory needed for regexec operations

approx

Enable the approximate matching functionality

dev-libs/uriparser

unicode

Add support for functions working with character type wchar_t (e.g. uriParseSingleUriW with trailing "W") which increases compile time and resulting binary file size by roughly factor 2.

dev-libs/weston

desktop

Enable the desktop shell

drm

Enable drm compositor support

editor

Install wayland-editor example application

fullscreen

Enable fullscreen shell

gles2

Enable the GLESv2 renderer, not just the x11-libs/pixman-based software fallback

headless

Headless backend and a noop renderer, mainly for testing purposes

ivi

Enable the IVI shell

kiosk

Enable the kiosk shell

pipewire

Enable virtual remote output with Pipewire on DRM backend

rdp

Enable Remote Desktop Protocol compositor support

remoting

Enable plugin to stream output to remote hosts using media-libs/gstreamer

resize-optimization

Increase performance, allocate more RAM. Recommended to disable on Raspberry Pi

screen-sharing

Enable screen-sharing through RDP

wayland-compositor

Enable Wayland compositor support

xwayland

Enable ability support native X11 applications

dev-libs/xerces-c

iconv

Use iconv (virtual/libiconv) as message loader and transcoder (in general it would be possible to use iconv only as message loader and something else like icu or the native method as transcoder and vice-versa, but this is a less common case and hard to handle)

threads

Enable threading support through pthread (or other libraries on AIX, IRIX, HPUX, Solars). Highly recommended

dev-libs/xmlrpc-c

abyss

Build the Abyss mini web-server.

libxml2

Use dev-libs/libxml2 to parse XML instead of the internal expat library.

threads

Controls whether to build the Abyss web-server with pthreads or fork 'threading'.

dev-libs/xmlsec

gcrypt

Install xmlsec-gcrypt library

gnutls

Install xmlsec-gnutls library

http

Allow fetching over HTTP via libxml2.

nss

Install xmlsec-nss library

openssl

Install xmlsec-openssl library

dev-libs/yaz

ziffy

Install ziffy, a promiscuous Z39.50 APDU sniffer

dev-lisp/clisp

hyperspec

Use local hyperspec instead of online version

svm

Build CLISP with support for the Support Vector Machine module

dev-lisp/clx

doc

Builds documentation

dev-lisp/cmucl

doc

Installs package documentation

gui

Build CLX, CLM, or Hemlock

source

Include source code for CMUCL in installation

dev-lisp/ecl

gengc

Use generational garbage collection (experimental)

precisegc

Use type information during garbage collection (experimental)

unicode

Make the produced lisp support unicode

dev-lisp/gcl

ansi

Build a GCL with ANSI support (else build a traditional CLtL1 image)

athena

Build xgcl - an interface to x11-libs/libXaw

dev-lisp/sbcl

system-bootstrap

Bootstrap SBCL using either system SBCL installation or dev-lisp/clisp

unicode

Make the produced lisp support unicode

dev-lua/lua-cjson

internal-fpconv

Enable internal number conversion routines, can increase overall performance by up to 50%

dev-ml/lablgtk

glade

Enable gnome-base/libglade bindings compilation

gnomecanvas

Enable gnome-base/libgnomecanvas bindings compilation

sourceview

Enable GtkSourceView (x11-libs/gtksourceview) support

dev-ml/logs

cli

Enables the Logs_cli library that provides command line support for controlling Logs.

fmt

Enables the Logs_fmt reporter.

lwt

Enables the Logs_lwt library that provides Lwt logging functions.

dev-ml/ocaml-fileutils

ocamlopt

Whether the OCaml native code compiler is used. Must be set globally and match dev-lang/ocaml.

dev-ml/ocaml-gettext

ocamlopt

Whether the OCaml native code compiler is used. Must be set globally and match dev-lang/ocaml.

dev-ml/ocaml-gettext-camomile

ocamlopt

Whether the OCaml native code compiler is used. Must be set globally and match dev-lang/ocaml.

dev-ml/ocaml-gettext-stub

ocamlopt

Whether the OCaml native code compiler is used. Must be set globally and match dev-lang/ocaml.

dev-ml/ocamlnet

httpd

Enables net-httpd web server component

zip

Enables netzip support to read/write gzip data using object channels

dev-ml/stdlib-shims

ocamlopt

Whether the OCaml native code compiler is used. Must be set globally and match dev-lang/ocaml.

dev-ml/tiny_httpd

camlzip

Interface to camlzip for tiny_httpd

dev-ml/uutf

utftrip

Builds and install the utftrip executable: Among other things, reads unicode on stdin and rewrites it on stdout.

dev-perl/App-Nopaste

browser

Spawn browser with pasted page

clipboard

copying of URLs with -x/--copy

gitlab

Ensure git is installed for reading/passing GitLab authentication

pastebin

pastebin.com support

dev-perl/Boulder

genbank

Provide support with Boulder::Genbank for decoding Genbank data records

store

Provide support with Boulder::Store for persisting Stone objects

dev-perl/Business-ISBN

barcode

Install dev-perl/GD-Barcode for rendering ISBN numbers as barcodes

dev-perl/Config-Any

conf

Install dev-perl/Config-General to support decoding .conf/.cnf files

ini

Install dev-perl/Config-Tiny to support decoding INI config files

json

Install support libraries to support decoding JSON config files

xml

Install support libraries to support decoding XML config files

yaml

Install support libraries to support decoding YAML config files

dev-perl/Cookie-Baker

xs

Install dev-perl/Cookie-Baker-XS for accelerated performance

dev-perl/Coro

ev

Build support for using dev-perl/EV as an event-loop via Coro::EV

event

Build support for using dev-perl/Event as an event-loop via Coro::Event

dev-perl/DBD-MariaDB

mariadb

Use dev-db/mariadb-connector-c as the client library

mysql

Use dev-db/mysql-connector-c as the client library

dev-perl/DBD-mysql

mariadb

Use dev-db/mariadb-connector-c as the client library

mysql

Use dev-db/mysql-connector-c as the client library

ssl

Compile in support for SSL connections via libmysqlclient

dev-perl/DBD-SQLite

system-sqlite

Use the system-wide dev-db/sqlite installation

dev-perl/DBIx-Class

admin

Modules required for the DBIx::Class administrative library

admin-script

Modules required for the CLI DBIx::Class interface dbicadmin

deploy

Modules required for "deploy" in DBIx::Class::Storage::DBI and "deploymen_statements" in DBIx::Class::Storage::DBI

replicated

Modules required for DBIx::Class::Storage::DBI::Replicated

dev-perl/File-HomeDir

xdg

Ensure XDG Semantics for returned paths via x11-misc/xdg-user-dirs

dev-perl/File-Which

pwhich

Install dev-perl/App-pwhich which used to be a part of this package

dev-perl/GD

animgif

Enable animated gif support

fcgi

Build for FastCGI compatibility via dev-libs/fcgi instead of using PerlIO

dev-perl/HTML-Mason

modperl

Enable www-apache/mod_perl support

dev-perl/HTTP-Entity-Parser

xs

Install C-Based dependieces for faster performance

dev-perl/JSON

xs

Install C-based dev-perl/JSON-XS for faster performance

dev-perl/JSON-MaybeXS

xs

Install a C-Based backend to make JSON encode/decode fast

dev-perl/List-MoreUtils

xs

Install C-Based backend implementation for performance

dev-perl/Mail-IMAPClient

md5

Install support for DIGEST-MD5 and CRAM-MD5 Authentication

ntlm

Install support for NTLM Authentication

ssl

Install support for SSL Connections

zlib

Install support for COMPRESS DEFLATE connections

dev-perl/MCE

sereal

Install dev-perl/Sereal-Encoder and decoder for faster worker IPC

dev-perl/Net-SSH2

gcrypt

Use libgcrypt instead of openssl

dev-perl/PDL

badval

Enable bad values support

hdf

Enable HDF (version 4) format support

netpbm

Enable NETPBM and MPEG support

pdl2

Build pdf2 shell (requires Devel-REPL)

pgplot

Enable PGPLOT plotting capabilities

dev-perl/perl-headers

debug

Add source locations in generated .ph files to assist with debugging when errors occur

sizeof-warning

Include logic to warn when a .ph file tries to use a sizeof() that is unknown

dev-perl/Ref-Util

xs

Install C-Based dev-perl/Ref-Util-XS for accelerated performance

dev-perl/Sub-Name

dev-perl/Sysadm-Install

hammer

Enable hammer() funtion to run a command in the shell and simulate a user hammering the ENTER key to accept defaults on prompts

dev-perl/Test-Warnings

dev-perl/Text-CSV

xs

Install dev-perl/Text-CSV_XS for accelerated decoding

dev-perl/WWW-Form-UrlEncoded

xs

Install C-Based dependieces for faster performance

dev-php/maxmind-db-reader

extension

Build the C extension that uses dev-libs/libmaxminddb

dev-php/pecl-apcu

lock-pthreadmutex

Enable pthread mutex locking

lock-pthreadrw

Enable pthread read/write locking

lock-semaphore

Enable semaphore locks instead of fcntl

lock-spinlock

Enable spin locks (EXPERIMENTAL)

dev-php/pecl-event

extra

Add support of the Libevent extra API

dev-php/pecl-memcached

igbinary

Enable support for the igbinary serializer

json

Enable support for json serialization

dev-php/pecl-redis

igbinary

Enables igbinary serialisation support

json

Enables json serializer support

dev-python/amqp

extras

Install extra tools to generate initial Python mod from an AMQP XML file

dev-python/apprise

dbus

Support sending notifications to the desktop over D-Bus

mqtt

Support sending notifications over MQTT

dev-python/autobahn

xbr

Add support for XBR decentralized data markets and etherium blockchain

dev-python/blake3

rust

Build the Rust implementation (if disabled, the "experimental" C implementation is used instead).

dev-python/bpython

clipboard

Enable copying to clipboard using dev-python/pyperclip

jedi

Enable autocompletion using dev-python/jedi

watch

Enable watching paths using dev-python/watchdog

dev-python/cbor2

native-extensions

Compiles native "C" extensions (speedups, instead of using python fallback code).

dev-python/cvxopt

dsdp

Use interior point library sci-libs/dsdp

glpk

Use GNU Linear Programming Kit sci-mathematics/glpk

dev-python/dnspython

dnssec

Use dev-python/cryptography to enable low-level DNSSEC RSA, DSA, ECDSA and EdDSA signature validation.

dev-python/editorconfig

cli

Install command line interface as well as python library

dev-python/fritzconnection

qrcode

Install dependencies needed to generate QR Codes for WiFi login.

dev-python/frozenlist

native-extensions

Compile native C extensions (speedups, instead of using Python fallback code).

dev-python/httpx

cli

Install the CLI "httpx" client.

dev-python/hypothesis

cli

Install a CLI tool used to write tests.

dev-python/icalendar

doc

Generate examples and other extra documentation

dev-python/immutables

native-extensions

Compiles native "C" extensions (speedups, instead of using Python fallback code).

dev-python/ipython

nbconvert

Enable support for converting notebooks to various formats using app-text/pandoc

notebook

Install requirements for the web notebook based on dev-python/tornado

dev-python/markdown-exec

ansi

Enable support for rendering ANSI colours in HTML code blocks

dev-python/matplotlib

excel

Pull dev-python/xlwt for the exceltools toolkit

gtk3

Enable x11-libs/gtk+:3 support

webagg

Enable webagg backend that uses dev-python/tornado

dev-python/mido

portmidi

Support using media-libs/portmidi as MIDI back-end

rtmidi

Support using media-libs/rtmidi as MIDI back-end

dev-python/mkdocs-material

social

Install the dependencies of the "social" plugin.

dev-python/msgpack

native-extensions

Compiles native "C" extensions (speedups, instead of using python fallback code).

dev-python/multidict

native-extensions

Compile native C extensions (speedups, instead of using Python fallback code).

dev-python/mypy

native-extensions

Compiles native C extensions (speedups, instead of using Python fallback code).

dev-python/netcdf4

blosc

Allow using blosc compression via dev-libs/c-blosc

dev-python/pandas

full-support

Pull all packages to give pandas full support

dev-python/paramiko

server

Enable server feature

dev-python/peewee

native-extensions

Compiles native C extension for more complete SQLite3 support.

dev-python/pillow

imagequant

Build with Image Quantization Library support

dev-python/pivy

quarter

Use media-libs/quarter for GUI bindings

soqt

Use media-libs/SoQt for GUI bindings

dev-python/pyarrow

parquet

Enables read/write parquet data format

dev-python/pyglet

image

Enable support for image formats other than PNG and BMP

dev-python/pymongo

native-extensions

Compiles native C extensions

test-full

Run test suite in full, including tests that run a local database instance.

dev-python/pyopengl-accelerate

numpy

Building NumPy native format handlers.

dev-python/pypax

ptpax

Enable PT_PAX_FLAGS support.

xtpax

Enable XATTR_PAX_FLAGS support.

dev-python/pypy

full-stdlib

Install complete stdlib as necessary to use PyPy for general purpose programs. By default, only a limited subset that is used when building PyPy3 executables is installed. Note that PyPy2.7's stdlib contains multiple known vulnerabilities.

dev-python/pypy3

test-install

Install the test suite packages, that are required to run tests in a few reverse dependencies.

dev-python/pypy3_10

ensurepip

Install the ensurepip module that uses bundled wheels to bootstrap pip and setuptools (if disabled, it will be only possible to use venv `--without-pip`)

test-install

Install the test suite packages, that are required to run tests in a few reverse dependencies.

dev-python/pypy3_10-exe

low-memory

Build using PyPy with the engine configured towards low memory footprint. This makes it possible to build PyPy using ~3.5G of RAM on amd64 and ~half of that on x86, at the cost of lengthened build time.

dev-python/pypy3_9

ensurepip

Install the ensurepip module that uses bundled wheels to bootstrap pip and setuptools (if disabled, it will be only possible to use venv `--without-pip`)

dev-python/pypy3_9-exe

low-memory

dev-python/pypy-exe

low-memory

dev-python/PyQt5

bluetooth

Build bindings for the QtBluetooth module

dbus

Build bindings for the QtDBus module

declarative

Build bindings for the QtQml and QtQuick modules and enable the qmlscene plugin

designer

Build bindings for the QtDesigner module and enable the designer plugin

gui

Build bindings for the QtGui module

help

Build bindings for the QtHelp module

location

Build bindings for the QtLocation module

multimedia

Build bindings for the QtMultimedia module

network

Build bindings for the QtNetwork module

opengl

Build bindings for the QtOpenGL module

positioning

Build bindings for the QtPositioning module

printsupport

Build bindings for the QtPrintSupport module

sensors

Build bindings for the QtSensors module

serialport

Build bindings for the QtSerialPort module

speech

Build bindings for the QtTextToSpeech module

sql

Build bindings for the QtSql module

svg

Build bindings for the QtSvg module

testlib

Build bindings for the QtTest module

webchannel

Build bindings for the QtWebChannel module

websockets

Build bindings for the QtWebSockets module

widgets

Build bindings for the QtWidgets module

x11extras

Build bindings for the QtX11Extras module

xmlpatterns

Build bindings for the QtXmlPatterns module

dev-python/PyQt6

bluetooth

Build bindings for the QtBluetooth module

dbus

Build bindings for the QtDBus module

designer

Build bindings for the QtDesigner module and enable the designer plugin

gui

Build bindings for the QtGui module

help

Build bindings for the QtHelp module

multimedia

Build bindings for the QtMultimedia module

network

Build bindings for the QtNetwork module

nfc

Build bindings for the QtNfc module

opengl

Build bindings for the QtOpenGL module

pdfium

Build bindings for the QtPdf module (uses pdfium from dev-qt/qtwebengine)

positioning

Build bindings for the QtPositioning module

printsupport

Build bindings for the QtPrintSupport module

qml

Build bindings for the QtQml module and enable the qml plugin

quick

Build bindings for the QtQuick module

quick3d

Build bindings for the QtQuick3D module

remoteobjects

Build bindings for the QtRemoteObjects module

sensors

Build bindings for the QtSensors module

serialport

Build bindings for the QtSerialPort module

spatialaudio

Build bindings for the QtSpatialAudio module

speech

Build bindings for the QtTextToSpeech module

sql

Build bindings for the QtSql module

svg

Build bindings for the QtSvg module

testlib

Build bindings for the QtTest module

webchannel

Build bindings for the QtWebChannel module

websockets

Build bindings for the QtWebSockets module

widgets

Build bindings for the QtWidgets module

xml

Build bindings for the QtXml module

dev-python/PyQt6-WebEngine

quick

Build bindings for the QtWebEngineQuick module

widgets

Build bindings for the QtWebEngineWidgets module

dev-python/pyrsistent

native-extensions

Compiles native C extensions (speedups, instead of using python fallback code).

dev-python/pyside2

3d

Build Qt3DCore, Qt3DAnimation, Qt3DExtras, Qt3DInput, Qt3DLogic, and Qt3DRender modules

charts

Build QtCharts module

concurrent

Build QtConcurrent module

datavis

Build QtDataVisualization module

designer

Build QtDesigner and QtUiTools modules

gles2-only

Build QtGui "QOpenGL*" classes

gui

Build QtGui module

help

Build QtHelp module

location

Build QtLocation module

multimedia

Build QtMultimedia and QtMultimediaWidgets modules

network

Build QtNetwork module

positioning

Build QtPositioning module

printsupport

Build QtPrintSupport module

qml

Build QtQml module

quick

Build QtQuick and QtQuickWidgets modules

scxml

Build QtScxml module

sensors

Build QtSensors module

speech

Build QtTextToSpeech module

sql

Build QtSql module

svg

Build QtSvg module

testlib

Build QtTest module

webchannel

Build QtWebChannel module

webengine

Build QtWebEngine and QtWebEngineWidgets modules

websockets

Build QtWebSockets module

widgets

Build QtWidgets module

x11extras

Build QtX11Extras module

xml

Build QtXml module

xmlpatterns

Build QtXmlPatterns module

dev-python/pyside6

3d

Build Qt3DCore, Qt3DAnimation, Qt3DExtras, Qt3DInput, Qt3DLogic, and Qt3DRender modules

bluetooth

Build QtBluetooth module

charts

Build QtCharts module

concurrent

Build QtConcurrent module

designer

Build QtDesigner and QtUiTools modules

gles2-only

Build QtGui "QOpenGL*" classes

gui

Build QtGui module

help

Build QtHelp module

location

Build QtLocation module

multimedia

Build QtMultimedia and QtMultimediaWidgets modules

network

Build QtNetwork module

network-auth

Build QtNetworkAuth module

nfc

Build QtNfc module

pdfium

Build QtPdf module

positioning

Build QtPositioning module

printsupport

Build QtPrintSupport module

qml

Build QtQml module

quick

Build QtQuick and QtQuickWidgets modules

quick3d

Build QtQuick3D and QtQuickWidgets modules

scxml

Build QtScxml module

sensors

Build QtSensors module

serialport

Build QtSerialPort modules

spatialaudio

Build QtSpatialAudio module

speech

Build QtTextToSpeech module

sql

Build QtSql module

svg

Build QtSvg module

testlib

Build QtTest module

webchannel

Build QtWebChannel module

webengine

Build QtWebEngine and QtWebEngineWidgets modules

websockets

Build QtWebSockets module

widgets

Build QtWidgets module

xml

Build QtXml module

dev-python/python-box

native-extensions

Compiles native C extensions

dev-python/python-lsp-server

all-plugins

Pull in all optional plugins

dev-python/python-mpd2

twisted

Enable twisted support

dev-python/python-stdnum

vies

Enable VIES

dev-python/pyudev

qt5

Install PyQt5 bindings

dev-python/pyzmq

drafts

Enable draft API support

dev-python/qiskit

visualization

Enable visualization modules

dev-python/QtPy

designer

Pull in bindings for the QtDesigner module and enable the designer plugin

gui

Pull in bindings for the QtGui module

help

Pull in bindings for the QtHelp module

multimedia

Pull in QtMultimedia and QtMultimediaWidgets modules

network

Pull in bindings for the QtNetwork module

opengl

Pull in bindings for the QtOpenGL module

positioning

Pull in bindings for the QtPositioning module

printsupport

Pull in bindings for the QtPrintSupport module

pyqt5

Use dev-python/PyQt5 as Qt for Python implementation

pyqt6

Use dev-python/PyQt6 as Qt for Python implementation

pyside2

Use dev-python/pyside2 as Qt for Python implementation

pyside6

Use dev-python/pyside6 as Qt for Python implementation

qml

Build bindings for the QtQml

quick

Build bindings for the QtQuick

sensors

Pull in bindings for the QtSensors module

serialport

Pull in bindings for the QtSerialPort module

speech

Pull in bindings for the QtTextToSpeech module

sql

Pull in bindings for the QtSql module

svg

Pull in bindings for the QtSvg module

testlib

Pull in bindings for the QtTest module

webchannel

Pull in bindings for the QtWebChannel module

webengine

Pull in QtWebEngine and QtWebEngineWidgets modules

websockets

Pull in bindings for the QtWebSockets module

widgets

Pull in bindings for the QtWidgets module

xml

Pull in QtXml module

dev-python/rarfile

compressed

Enables the module to support compressed v3 archives by calling the app-arch/unrar.

dev-python/reedsolo

native-extensions

Compile native C extensions.

dev-python/rfc3986

idna

enable support for the IDNA specification (RFC 5891)

dev-python/rpyc

gdb

Run tests depending on dev-debug/gdb

numpy

Run tests depending on dev-python/numpy, dev-python/pandas

dev-python/shiboken2

docstrings

Expose documentation as Python docstrings (recommended)

numpy

Implicitly convert passed NumPy arrays to Qt lists

vulkan

Generate "QSurface::VulkanSurface" bindings

dev-python/shiboken6

docstrings

Expose documentation as Python docstrings (recommended)

numpy

Implicitly convert passed NumPy arrays to Qt lists

vulkan

Generate "QSurface::VulkanSurface" bindings

dev-python/simplejson

native-extensions

Compiles native "C" extensions (speedups, instead of using Python fallback code).

dev-python/stripe

telemetry

Enable sending "telemetry to Stripe regarding request latency and feature usage" by default. Upstream enables it by default in their PyPI distribution; it can also be explicitly controlled via stripe.enable_telemetry variable (boolean).

dev-python/subprocess-tee

test-full

Enable full test mode. Pulls in many additional dependencies, and requires having been emerged without this flag first in order to avoid a circular dependency.

dev-python/sympy

imaging

Add support for dev-python/pillow

ipython

Add support for dev-python/ipython

mathml

Add support for mathml

pyglet

Use dev-python/pyglet for plots and print preview

symengine

Add support for a dev-python/symengine backend

texmacs

Add app-office/texmacs interface

dev-python/tables

cpudetection

Enables runtime CPU detection (useful for bindist, compatibility on other CPUs)

dev-python/tpm2-pytss

fapi

Enable feature API (requires tpm2-tss be compile with thes same)

dev-python/translate-toolkit

html

Support conversion between po and html files

ical

Support conversion between po and ical files

ini

Support conversion between po and ini files

subtitles

Support conversion between po and sub files

yaml

Support YAML format

dev-python/twisted

conch

include Twisted SSHv2 implementation

serial

include serial port support

dev-python/websockets

native-extensions

Compiles native C extensions

dev-python/wrapt

native-extensions

Compiles native C extensions (speedups, instead of using python fallback code).

dev-python/zeep

async

Add async support

dev-qt/designer

declarative

Build the qdeclarativeview plugin

dev-qt/linguist-tools

qml

Enable QML support in lupdate

dev-qt/qdoc

qml

Enable QML/JS parsing support

dev-qt/qt3d

gamepad

Add support for gamepad hardware via dev-qt/qtgamepad

qml

Build QML/QtQuick bindings

dev-qt/qt5compat

qml

Build QML/QtQuick bindings and imports

dev-qt/qtbase

concurrent

Build Qt6Concurrent module

dbus

Build Qt6DBus module

eglfs

Build the EGL Full Screen/Single Surface platform plugin

evdev

Enable support for input devices via evdev

gssapi

Enable support for GSSAPI (virtual/krb5)

gtk

Build the GTK platform theme plugin

gui

Build Qt6Gui module

journald

Log messages using sys-apps/systemd's journald rather than output to stderr (override with the QT_FORCE_STDERR_LOGGING=1 env var)

libinput

Enable support for input devices via dev-libs/libinput

libproxy

Use net-libs/libproxy for automatic HTTP/SOCKS proxy configuration

network

Build Qt6Network module

renderdoc

Enable support for capturing graphic's API calls using media-gfx/renderdoc

sql

Build Qt6Sql module

syslog

Log messages using syslog rather than output to stderr (override with the QT_FORCE_STDERR_LOGGING=1 env var)

tslib

Enable support for touchscreen devices via x11-libs/tslib

widgets

Build Qt6Widgets module

X

Build the XCB platform plugin and enable X11 integration

dev-qt/qtbluetooth

qml

Build QML/QtQuick bindings and imports

dev-qt/qtcharts

qml

Build QML/QtQuick bindings and imports

dev-qt/qtconnectivity

neard

Use net-wireless/neard to access NFC devices

nfc

Enable support for the Near Field Communication protocol

dev-qt/qtcore

old-kernel

Disable syscalls not available on Linux kernels older than 4.11

dev-qt/qt-creator

clang

Build clang-based plugins for C/C++ development (code model, formatting, static analysis)

designer

Enable designer for QtWidgets-based UIs

help

Enable the integrated dev-qt/qt-docs viewer (also needed for examples)

plugin-dev

Install the 'Devel' component needed to build external Qt Creator plugins

qmldesigner

Build QmlDesigner and related plugins (Insight, StudioWelcome)

serialterminal

Build the serial terminal plugin

tracing

Build plugins for tracing requiring extra dependencies (AppStatisticsMonitor, CtfVisualizer, PerfProfiler, QmlProfiler)

webengine

Use dev-qt/qtwebengine with the help USE rather than bundled litehtml

dev-qt/qtdatavis3d

qml

Build QML/QtQuick bindings and imports

dev-qt/qtdeclarative

localstorage

Build the LocalStorage import for QtQuick (requires QtSql)

network

Enable QtNetwork support

opengl

Enable OpenGL support

qmlls

Build the qmlls tool using dev-qt/qtlanguageserver

sql

Enable QtSQL support

widgets

Enable QtWidgets support

dev-qt/qtdiag

network

Report network information

widgets

Report widget style information

dev-qt/qt-docs

3d

Install documentation for dev-qt/qt3d

activeqt

Install documentation for ActiveQt (unpackaged, Windows-only)

assistant

Install documentation for dev-qt/assistant

bluetooth

Install documentation for dev-qt/qtbluetooth

charts

Install documentation for dev-qt/qtcharts

concurrent

Install documentation for dev-qt/qtconcurrent

connectivity

Install documentation for dev-qt/qtconnectivity

datavis

Install documentation for dev-qt/qtdatavis3d (unpackaged for Qt6)

declarative

Install documentation for dev-qt/qtdeclarative

designer

Install documentation for dev-qt/designer

gamepad

Install documentation for dev-qt/qtgamepad (available in qt overlay only)

graphicaleffects

Install documentation for dev-qt/qtgraphicaleffects

graphs

Install documentation for QtGraphs (unpackaged)

grpc

Install documentation for QtGRPC (unpackaged)

gui

Install documentation for dev-qt/qtgui

help

Install documentation for dev-qt/qthelp

html

Install documentation in HTML format

httpserver

Install documentation for QtHTTPServer (unpackaged)

imageformats

Install documentation for dev-qt/qtimageformats

linguist

Install documentation for dev-qt/linguist

location

Install documentation for dev-qt/qtlocation

lottie

Install documentation for QtLottie (unpackaged)

multimedia

Install documentation for dev-qt/qtmultimedia

network

Install documentation for dev-qt/qtnetwork

networkauth

Install documentation for dev-qt/qtnetworkauth

positioning

Install documentation for dev-qt/qtpositioning

printsupport

Install documentation for dev-qt/qtprintsupport

qch

Install documentation in QCH format

qdoc

Install documentation for dev-qt/qdoc

qt5compat

Install documentation for dev-qt/qt5compat

quick3d

Install documentation for dev-qt/qtquick3d

quick3dphysics

Install documentation for QtQuick3DPhysics (unpackaged)

quickcontrols

Install documentation for dev-qt/qtquickcontrols

quickcontrols2

Install documentation for dev-qt/qtquickcontrols2

quickeffectmaker

Install documentation for QtQuickEffectMaker (unpackaged)

remoteobjects

Install documentation for QtRemoteObjects (unpackaged)

script

Install documentation for dev-qt/qtscript

scxml

Install documentation for dev-qt/qtscxml

sensors

Install documentation for dev-qt/qtsensors

serialbus

Install documentation for dev-qt/qtserialbus (unpacakged for Qt6)

serialport

Install documentation for dev-qt/qtserialport

shadertools

Install documentation for dev-qt/qtshadertools

speech

Install documentation for dev-qt/qtspeech

sql

Install documentation for dev-qt/qtsql

svg

Install documentation for dev-qt/qtsvg

timeline

Install documentation for dev-qt/qtquicktimeline

tools

Install documentation for dev-qt/qttools

virtualkeyboard

Install documentation for dev-qt/qtvirtualkeyboard

wayland

Install documentation for dev-qt/qtwayland

webchannel

Install documentation for dev-qt/qtwebchannel

webengine

Install documentation for dev-qt/qtwebengine

websockets

Install documentation for dev-qt/qtwebsockets

webview

Install documentation for dev-qt/qtwebview (unpackaged for Qt6)

widgets

Install documentation for dev-qt/qtwidgets

x11extras

Install documentation for dev-qt/qtx11extras

xmlpatterns

Install documentation for dev-qt/qtxmlpatterns

dev-qt/qtgamepad

evdev

Enable support for input devices via evdev

qml

Build QML bindings

dev-qt/qtgui

eglfs

Build the EGL Full Screen/Single Surface platform plugin

evdev

Enable support for input devices via evdev

ibus

Build the IBus input method plugin

libinput

Enable support for input devices via dev-libs/libinput

linuxfb

Enable Linux framebuffer support for embedded devices

tslib

Enable support for touchscreen devices via x11-libs/tslib

tuio

Build plugin to receive touch events over the TUIO protocol

wayland

Provide dev-qt/qtwayland to ensure Qt applications can be run as Wayland clients

X

Build the XCB platform plugin and enable X11 integration

dev-qt/qthttpserver

websockets

Enable websockets support using dev-qt/qtwebsockets

dev-qt/qtmultimedia

eglfs

Enable screen capture support with Qt's EGL Full Screen/Single Surface platform plugin

gstreamer

Enable audio support via media-libs/gstreamer

qml

Build QML/QtQuick bindings and imports

widgets

Build the QtMultimediaWidgets module

dev-qt/qtnetwork

gssapi

Enable support for GSSAPI (virtual/krb5)

libproxy

Use net-libs/libproxy for automatic HTTP/SOCKS proxy configuration

dev-qt/qtpositioning

geoclue

Use enhanced location information from app-misc/geoclue

nmea

Build plugin for parsing NMEA (National Marine Electronics Association) sentences

qml

Build QML bindings

dev-qt/qtquickcontrols

widgets

Enable QtWidgets support

dev-qt/qtquickcontrols2

widgets

Enable QtWidgets support

dev-qt/qtremoteobjects

qml

Build QML/QtQuick bindings and imports

dev-qt/qtscript

scripttools

Build the QtScriptTools module (requires QtWidgets)

dev-qt/qtscxml

qml

Build QML/QtQuick bindings and imports

dev-qt/qtsensors

qml

Build QML bindings

dev-qt/qtspeech

flite

Enable text-to-speech synthesizer plugin using app-accessibility/flite engine

qml

Build QML/QtQuick bindings and imports

speechd

Enable text-to-speech synthesizer plugin using app-accessibility/speech-dispatcher engine

dev-qt/qttools

assistant

Build Qt Assistant and the QtHelp module

clang

Enable using libclang for code parsing (linguist/qdoc)

designer

Build Qt Designer

distancefieldgenerator

Build Qt Distance Field Generator

linguist

Build Qt Linguist (GUI requires USE=widgets)

pixeltool

Build Qt Pixeltool

qdbus

Build the Qt D-Bus Interface (D-Bus Viewer requires USE=widgets)

qdoc

Build Qt Documentation Generator

qml

Build QML/QtQuick bindings and imports

qmlls

Build the QtHelp plugin for the QML language server

qtattributionsscanner

Build Qt Source Code Attribution Scanner

qtdiag

Build Qt Diag

qtplugininfo

Build Qt Plugin Info

widgets

Enable QtWidgets support

dev-qt/qtvirtualkeyboard

handwriting

Adds handwriting recognition integration support

dev-qt/qtwayland

compositor

Enable support for the wayland compositor / server APIs

gnome

Build the GNOME-like decoration plugin (loaded by default with GNOME)

qml

Build QML/QtQuick bindings and imports

vulkan

Enable support for Vulkan-based server buffer integration

dev-qt/qtwebchannel

qml

Build QML/QtQuick bindings and imports

dev-qt/qtwebengine

designer

Install the QWebEngineView plugin used to add widgets in dev-qt/designer forms that display web pages.

jumbo-build

Combine source files to speed up build process.

pdfium

Build the QtPdf module based on chromium's PDFium library

qml

Build QML/QtQuick bindings and imports

system-icu

Use the system-wide dev-libs/icu instead of bundled.

webdriver

Build tool for automated testing (ChromeDriver equivalent)

widgets

Enable QtWidgets support

dev-qt/qtwebsockets

qml

Build QML bindings

dev-qt/qtwidgets

gtk

Build the GTK platform theme plugin

dev-qt/qtxmlpatterns

qml

Build the XmlListModel import for QtQuick (requires QtDeclarative)

dev-ruby/activesupport

msgpack

Support ActiveSupport::MessagePack module

dev-ruby/asciidoctor-diagram

barcode

Enable diagrams with dev-ruby/rqrcode and dev-ruby/barby

ditaa

Enable diagrams with media-gfx/ditaa

lilypond

Enable diagrams with media-sound/lilypond

meme

Enable diagrams with media-gfx/imagemagick

mscgen

Enable diagrams with media-gfx/mscgen

plantuml

Enable diagrams with media-gfx/plantuml

tikz

Enable diagrams with dev-tex/pgf

dev-ruby/barby

cairo

Add support for writing images (PNG, PS, EPS and, if supported, PDF and SVG) using dev-ruby/rcairo. Not available on JRuby.

png

Add support for writing PNG images using dev-ruby/chunky_png.

prawn

Add support for writing PDF documents using dev-ruby/prawn.

qrcode

Add support for QRCode 2D codes using dev-ruby/rqrcode.

rmagick

Add support for writing images (among others PNG, GIF and JPEG) using dev-ruby/rmagick. Not available on JRuby.

dev-ruby/faraday_middleware

mashify

Include FaradayMiddleware::Mashify

oauth

Include FaradayMiddleware::OAuth

parsexml

Include FaradayMiddleware::ParseXml

rashify

Include FaradayMiddleware::Rashify

dev-ruby/io-event

io-uring

Enable io_uring support, and use io_uring instead of epoll

dev-ruby/jwt

eddsa

Support EdDSA algorithm using dev-ruby/rbnacl

dev-ruby/maruku

highlight

Enable source code highlighting via dev-ruby/syntax

dev-ruby/mysql2

mariadb

Use mariadb bindings

dev-ruby/net-ssh

chacha20

Use dev-ruby/rbnacl for chacha20-poly1305@openssh.com support

ed25519

Use dev-ruby/ed25519 for Ed25519 support

dev-ruby/rrdtool-bindings

graph

Enable support for graphing functions

dev-ruby/rspec-core

highlight

Enable source code highlighting via dev-ruby/coderay

dev-ruby/rubygems

server

Install support for the rubygems server

dev-ruby/vcr

json

Add support for casettes serialized with JSON

dev-scheme/bigloo

avahi

Enable Avahi support

gpg

Enable GPG support

libuv

Enable libuv support

dev-scheme/gauche-gl

cg

Enable NVidia Cg binding

dev-scheme/guile

debug-freelist

Include garbage collector freelist debugging code

debug-malloc

Include malloc debugging code

deprecated

Enable deprecated features

discouraged

(implied by deprecated) enable merely discouraged features

networking

Include networking interfaces

regex

Include regular expression interfaces

dev-scheme/kawa

awt

Assume AWT is available

frontend

Build "kawa" front-end program using sys-libs/readline

jemacs

Build JEmacs

krl

Build BRL emulation and KRL

sax

Assume SAX2 is available with dev-java/sax

servlets

Build support for generating servlets with Java servletapi

swing

Assume Swing is available

dev-scheme/mit-scheme

blowfish

Compile with blowfish encryption support

dev-scheme/racket

chez

Build Racket on Chez (Racket CS)

futures

Enable racket/future library for fine-grained hardware parallelism

ncurses

Add ncurses support for expeditor (REPL expression editor)

places

Enable racket/place library for share-nothing parallelism and message-passing communication. Compared to futures, places are heavyweight, but they have a simpler performance model.

threads

Enable support for green threads

dev-scheme/scm

arrays

Support for arrays, uniform-arrays and uniform-vectors.

bignums

Support for large precision integers.

cautious

SCM will always check the number of arguments to interpreted closures.

dynamic-linking

Be able to load compiled files while running.

engineering-notation

Floats to display in engineering notation (exponents always multiples of 3) instead of scientific notation.

gsubr

generalized c arguments: for arbitrary (more then 11) arguments to C functions.

inexact

Support for floating point numbers.

ioext

Commonly available I/O extensions: line I/O, file positioning, file delete and rename, and directory functions.

libscm

Build and install libscm.a and related headers

macro

C level support for hygienic and referentially transparent macros (syntax-rules macros).

regex

String regular expression matching.

unix

Support for: nice, acct, lstat, readlink, symlink, mknod and sync.

dev-scheme/slib

gambit

Support for gambit scheme implementation

scm

Support for scm scheme implementation

dev-tcltk/expect-lite

debug

pull in packages needed for runtime interactive debugger

dev-tcltk/tcl3d

ode

Enable support for physics engine from dev-games/ode

osg

Enable support for 3D toolkit from dev-games/openscenegraph

dev-tcltk/tktreectrl

shellicon

shellicon extension

dev-tex/abntex

lyx

Install with app-office/lyx layout

dev-tex/biblatex

biber

Install the unicode compatible backend processor

dev-texlive/texlive-basic

luajittex

Add support for LuaJitTeX: LuaTeX based on LuaJIT which is usually faster.

dev-tex/pythontex

highlighting

Syntax highlighting using dev-python/pygments

dev-util/babeltrace

elfutils

Build the dev-util/lttng-ust debug information filter component class

plugins

Build support for Babeltrace 2 Python plugins

dev-util/bpftool

caps

Use sys-libs/libcap to enable unprivileged run support

llvm

Use sys-devel/llvm instead of libbfd (sys-libs/binutils-libs) for JIT disassembly

dev-util/breakpad

tools

Build tools

dev-util/buildbot

docker

Add support for worker docker command steps

irc

Add support for status delivery through an ircbot.

dev-util/cargo-audit

fix

Add support for 'fix' subcommand (experimental)

dev-util/catalyst

ccache

Enables ccache support

iso

Pulls in the depends for building iso images

system-bootloader

Pulls in the depends needed to setup livecd bootloader from the host system rather than using a cdtar

dev-util/ccache

redis

Enable Redis backend for storage via dev-libs/hiredis

static-c++

Avoid dynamic dependency on gcc's libstdc++.

dev-util/cccc

apidoc

Build software docs with doxygen/graphviz and metrics with cccc

mfc

Add patch for MFC dialect options

dev-util/codeblocks

contrib

Build additional contrib components

fortran

Build FortranProject plugin which enables to use Code::Blocks IDE for Fortran language

dev-util/cppcheck

charts

Enable QtCharts usage in the GUI

htmlreport

install cppcheck-htmlreport

dev-util/ctags

json

Enable JSON output support

xml

Enable XML parsing support

yaml

Enable YAML parsing support

dev-util/cwdiff

mercurial

install hg wdiff alias for dev-vcs/mercurial

dev-util/devhelp

gedit

Install plugin for app-editors/gedit

dev-util/dialog

minimal

Disable library, install command-line program only

dev-util/diffoscope

dev-util/dropwatch

bfd

Add support for Binary File Descriptor

dev-util/edi

clang

Provide integration with sys-devel/clang and dev-util/bear for autocompletion, inline errors and information about compilation units.

dev-util/flatpak-builder

yaml

Use libyaml for yaml support

dev-util/geany

vte

Enable Terminal support (x11-libs/vte)

dev-util/geany-plugins

ctags

Enable ctags plugin

debugger

Enable the debugger plugin which interfaces with dev-debug/gdb

enchant

Enable spell checking using enchant

gpg

Enable geanypg plugin which integrates GPG using app-crypt/gpgme

gtkspell

Use gtkspell for dictionary support in GeanyVC

markdown

Enable the markdown plugin

pretty-printer

Enable pretty-printer plugin

scope

Enable the scope plugin which is a graphical GDB front-end

webhelper

Enable webhelper plugin

workbench

Enable workbench plugin

dev-util/glade

gjs

Build catalog support for dev-libs/gjs widgets.

webkit

Build catalog support for net-libs/webkit-gtk:4 widgets.

dev-util/global

vim

Integrate the GNU GLOBAL source code tag system with Vim

dev-util/gnome-builder

clang

Provide integration with sys-devel/clang for best possible C/C++ autocompletion, semantic highlighting, symbol resolving, and diagnostics support

d-spy

Provide D-Bus debugging functionality via dev-debug/d-spy

flatpak

Enable support for flatpak applications using sys-apps/flatpak

git

Provide support for the Git version control system via dev-libs/libgit2-glib (such as setup of Git for New Project, direct cloning for Open Project and changed lines indicators in the editor gutter)

sysprof

Provide an integrated profiler via dev-util/sysprof

dev-util/google-perftools

debug

Build a set of libraries with debug support (so-called debugalloc). These are available by default but are not needed unless you're actually developing using tcmalloc.

minimal

Only build the tcmalloc_minimal library, ignoring the heap checker and the profilers.

optimisememory

To build libtcmalloc with smaller internal caches.

pagesize-128k

Use 128K page size for tcmalloc. Larger size makes tcmalloc faster, at the cost of using more space (due to internal fragmentation)

pagesize-16k

Use 16K page size for tcmalloc. Larger size makes tcmalloc faster, at the cost of using more space (due to internal fragmentation)

pagesize-256k

Use 256K page size for tcmalloc. Larger size makes tcmalloc faster, at the cost of using more space (due to internal fragmentation)

pagesize-32k

Use 32K page size for tcmalloc. Larger size makes tcmalloc faster, at the cost of using more space (due to internal fragmentation)

pagesize-64k

Use 64K page size for tcmalloc. Larger size makes tcmalloc faster, at the cost of using more space (due to internal fragmentation)

dev-util/heaptrack

gui

Install Qt5-based analyzer tool

dev-util/hfstospell

clang

Use different logic in ebuild when clang is used

dev-util/hip

hip

Build HIP runtime

opencl

Build OpenCL runtime

video_cards_amdgpu

Build for AMD platform

video_cards_nvidia

Build for Nvidia platform

dev-util/intel-graphics-compiler

vc

Enable VectorCompiler for a better performance.

dev-util/intel-graphics-system-controller

cli

Build CLI tools for flashing manually a firmware upgrade.

dev-util/kcov

binutils

Use sys-libs/binutils-libs for `--verify` support

dev-util/kdevelop

gdbui

Enable GUI for attaching GDB to a running process

qmake

Enable support for QMake build system

Enable support for patch sharing using kde-frameworks/purpose

dev-util/kernelshark

custom-optimization

Build with user-specified compiler optimizations (-Os, -O0, -O1, -O2, -O3) from CFLAGS

dev-util/kup

gitolite

Enable support for dev-vcs/gitolite in kup-server

dev-util/libabigail

btf

Handle reading kernel debug files in BTF format via dev-libs/libbpf

dev-util/librnp

botan

Use Botan crypto backend instead of OpenSSL

dev-util/lttng-tools

ust

Support LTTng-UST (Userspace Tracing)

dev-util/lttng-ust

numa

Enable numa support

dev-util/massif-visualizer

callgraph

Enable detailed snapshot analysis using media-gfx/kgraphviewer

dev-util/mingw64-runtime

default-ucrt

Use ucrt instead of msvcrt-os as the default crt (WARNING: incompatible with each others and also for building Wine with USE=mingw, pick one from the start and keep it)

idl

Install idl files

libraries

Build extra libraries: mangle, pseh, winpthreads

tools

Build extra tools: gendef, genidl, widl

dev-util/mingw64-toolchain

bin-symlinks

Symlink executables to usr/bin to be in default PATH (conflicts with crossdev mingw, and crossdev is preferable for a fully featured toolchain)

dev-util/nvidia-cuda-toolkit

debugger

Install the CUDA debugger

nsight

Install profiling and optimizing tools (nsight-compute, nsight-systems)

profiler

Install the NVIDIA CUDA profiler (nvprof) and the related libraries

rdma

Enable infiniband support via sys-cluster/rdma-core

sanitizer

Install compute-sanitizer tool

vis-profiler

Install the NVIDIA CUDA visual profiler (nvvp)

dev-util/oprofile

apidoc

Provide doxygen generated API docs.

dev-util/ostree

archive

Use libarchive

dracut

Install dracut module

gpg

Enable GPG support

grub

Enable grub configuration generator

httpd

Enable ostree trivial-httpd entrypoint

libmount

Use libmount

sodium

Use libsodium for ed25519

soup

Use libsoup for networking

dev-util/perf

babeltrace

Enable dev-util/babeltrace support

bpf

Enable support for eBPF features with dev-libs/libbpf

capstone

Use dev-libs/capstone for disassembly support

doc

Build documentation and man pages. With this USE flag disabled, the --help parameter for perf and its sub-tools will not be available. This is optional because it depends on a few documentation handling tools that are not always welcome on user systems.

libpfm

Enable dev-libs/libpfm support

libtraceevent

Enable dev-libs/libtraceevent support

libtracefs

Enable dev-libs/libtracefs support

numa

Enable NUMA support

perl

Add support for Perl as a scripting language for perf tools.

systemtap

Add support to define SDT event in perf tools.

unwind

Use sys-libs/libunwind for frame unwinding support.

dev-util/pkgconf

native-symlinks

Install generic symlinks like pkgconf and pkg-config. If this flag is disabled, only CHOST-prefixed pkg-config executables will be available to end users and ebuilds.

dev-util/plan9port

freefonts

Don't install BigelowHolmes fonts

dev-util/poke

nbd

Enable poking at networked block devices via sys-libs/libnbd.

pvm-profiling

Enable profiling in the PVM

dev-util/pycharm-community

bundled-jdk

Use bundled jdk

dev-util/pycharm-professional

bundled-jdk

Use bundled jdk

dev-util/ropper

z3

Enable Z3 contraint solver support

dev-util/scanmem

gui

Enable the GameConqueror GUI

dev-util/sccache

azure

Enable Azure Blob Storage support

dist-client

Enables distributed support in the sccache client

dist-server

Enables the sccache-dist binary

gcs

Enable Google Cloud Storage support

redis

Enable Redis support

s3

Enable full Amazon S3 support

simple-s3

Enable minimal Amazon S3 support

dev-util/schroot

btrfs

Enable support for chroots using btrfs snapshots

dchroot

Enables the building of a wrapper named "dchroot", replacing sys-apps/dchroot

lvm

Enable support for chroots using LVM snapshots

zfs

Enable support for chroots using ZFS shapshots/clones

dev-util/sdl-jstest

sdl

Enable media-libs/libsdl2 based input test

sdl1

Enable media-libs/libsdl based input test

dev-util/selenium-manager

telemetry

Disable sending telemetry by default (avoid-stats config option).

dev-util/sysprof

unwind

Use sys-libs/libunwind to unwind the stack

dev-util/Tensile

client

Build and install tensile_client executable to run benchmarks and tune GPU GEMM

dev-util/uftrace

capstone

Use capstone to provide dynamic tracing without recompilation

dev-util/vulkan-tools

cube

Build the cube/cubepp demos

dev-util/watchman

python

Install pywatchman bindings and the watchman-{wait,make} utils

dev-vcs/cvs

server

Enable server support

dev-vcs/darcs

curl

Use libcurl for HTTP support.

terminfo

Use the terminfo package for enhanced console support.

threaded

Use threading and SMP support.

dev-vcs/fossil

fusefs

Enable the Fuse Filesystem

json

Enable the JSON API of Fossil's wiki

system-sqlite

Use the system SQLite instead of the bundled one

tcl-private-stubs

Enable Tcl integration via private stubs mechanism

tcl-stubs

Enable Tcl integration via stubs library mechanism

th1-docs

Enable TH1 for embedded documentation pages

th1-hooks

Enable TH1 hooks for commands and web pages

dev-vcs/git

blksha1

Use the new optimized SHA1 implementation

cgi

Install gitweb too

curl

Support fetching and pushing (requires webdav too) over http:// and https:// protocols

gpg

Pull in gnupg for signing -- without gnupg, attempts at signing will fail at runtime!

highlight

GitWeb support for app-text/highlight

mediawiki

Support pulling and pushing from MediaWiki

perforce

Add support for Perforce version control system (requires manual installation of Perforce client)

safe-directory

Respect the safe.directory setting

subversion

Include git-svn for dev-vcs/subversion support

tk

Include the 'gitk' and 'git gui' tools

webdav

Adds support for push'ing to HTTP/HTTPS repositories via DAV

dev-vcs/git-annex

assistant

Enable git-annex assistant and watch command

benchmark

Enable benchmarking

dbus

Enable dbus support

gitlfs

Build with git-lfs library (rather than vendored copy)

magicmime

Use libmagic to determine file MIME types

pairing

Enable pairing

torrentparser

Use haskell torrent library to parse torrent files

webapp

Enable git-annex webapp

dev-vcs/git-delete-merged-branches

full-name-executable

Install executable /usr/bin/git-delete-merged-branches that is in conflict with dev-vcs/git-extras

dev-vcs/gitg

glade

Install a glade catalog file

python

Install Python bindings for those plugins requiring it.

dev-vcs/gitolite

tools

Install tools to e.g. convert a Gitosis config to gitolite or one to check if your setup is gitolite >= 3.x compatible

dev-vcs/gitolite-gentoo

tools

Install tools to e.g. convert a Gitosis config to gitolite or one to check if your setup is gitolite >= 3.x compatible

dev-vcs/mercurial

chg

Support Mercurial command server client

gpg

Support signing with GnuPG.

rust

Use Rust extensions.

tk

Install dev-lang/tk for hgk script.

dev-vcs/subversion

extras

Install extra scripts (examples, tools, hooks)

kwallet

Enable encrypted storage of passwords with kde-frameworks/kwallet

plaintext-password-storage

Enable on-disk caching of plaintext passwords and passphrases. (Enabling this functionality will not force Subversion to store passwords in plaintext, but does permit users to explicitly allow that behavior via runtime configuration.)

games-action/beathazardultra

bundled-libs

Use the upstream provided bundled libraries.

games-action/descent1-freedata

l10n_de

Provides German translations for the game's briefings, robot descriptions, and outro of the original campaign

opl3-musicpack

Include alternate version of the game's music, recorded with the Yamaha YMF262 OPL3 soundchip

sc55-musicpack

Include alternate version of the game's music, recorded with the Roland Sound Canvas SC-55 MIDI module

textures

Include high resolution (640x480) backgrounds, briefing images and fonts (Descent 1)

games-action/descent2-freedata

l10n_de

Provides German translations for the game's briefings, robot descriptions, and outro of the original campaign

opl3-musicpack

Include alternate version of the game's music, recorded with the Yamaha YMF262 OPL3 soundchip

sc55-musicpack

Include alternate version of the game's music, recorded with the Roland Sound Canvas SC-55 MIDI module

games-action/dxx-rebirth

d1x

Install Descent 1 resources and executable

d2x

Install Descent 2 resources and executable

data

Ensure some game levels are present; if the full game's level data is not already installed then install the playable demo data (i.e. shareware levels)

debug

Enable various debugging code paths and sanity checks, not just output. Some of these checks date back to the retail build, and choke on some custom levels because the game was never coded to sufficiently distrust inputs

editor

Enable level editor support

l10n_de

Provides German translations for the game's briefings, robot descriptions, and outro of the original campaign

midi

Enforce that SDL-mixer is used and has midi support

music

Enable music support

opl3-musicpack

Include alternate version of the game's music, recorded with the Yamaha YMF262 OPL3 soundchip

sc55-musicpack

Include alternate version of the game's music, recorded with the Roland Sound Canvas SC-55 MIDI module

sdl2

Use libSDL2, SDL2-mixer instead of libSDL-1* and SDL-mixer-1*

tracker

Enable support for the PHP-based multiplayer game tracker

games-action/hotline-miami

bundled-libs

Use bundled libraries.

launcher

Install qt launcher

games-action/prismlauncher

qt6

Build with Qt6 support instead of the default Qt5

games-action/supermariowar

server

Compile and install Super Mario War server files

games-action/supertuxkart

nettle

Use dev-libs/nettle crypto backend

recorder

Enable recording with media-libs/libopenglrecorder

sqlite

Record IP bans, statistics in server mode with dev-db/sqlite

wiimote

Support for wiimote input devices

games-action/swordandsworcery

bundled-libs

Use the upstream provided bundled libraries.

games-action/trine

launcher

Install GTK+ launcher

games-action/trine2

launcher

Install GTK+ launcher

games-action/trine-enchanted-edition

launcher

Install GTK+ launcher

games-arcade/bomns

editor

enables building the level editor

games-arcade/commandergenius

downloader

Allows some Keen games to be downloaded from the menu

games-arcade/jazz2

sdl

Prefer SDL2 over GLFW backend

server

Build the multiplayer game server

games-arcade/jazz2-data

cc

Install The Christmas Chronicles additional data

demo

Use the free demo data instead of the full retail game data

games-arcade/lbreakout2

themes

Install additional themes

games-arcade/moleinvasion

music

Download and install the music files

games-arcade/oshu

osu-skin

Include more complete osu-skin (other is minimal)

games-arcade/osu-lazer

pipewire

Use pipewire to enable sound output

games-arcade/performous

midi

Enable MIDI I/O support

songs

Install a few demo songs

webcam

Enable Webcam support

games-arcade/tuxanci

physfs

Use dev-games/physfs instead of dev-libs/libzip to load compressed data

games-board/cockatrice

client

Build with client

oracle

Build with oracle

server

Compile server support

games-board/crafty

no-opts

Don't try to enable crazy CFLAG options

games-board/freedoko

backgrounds

Install additional background images

gnomecards

Install the gnome-games card set

kdecards

Install the KDE card set

openclipartcards

Install the openclipartcards card set

pysolcards

Install the PySol card set

xskatcards

Install the XSkat card set

games-board/pasang-emas

extras

Install some extra themes

games-board/pioneers

help

Enable gnome ingame help via scrollkeeper

games-board/pysolfc

extra-cardsets

Install extra cardsets

sound

Enable sound support using dev-python/pygame

games-board/scid

photos

Install collection of player photos (large)

scripts

Install additional python and tcl utility scripts

games-board/stockfish

general-32

Generic unoptimized 32-bits build

general-64

Generic unoptimized 64-bits build

optimize

Enable upstream -O3 optimizations (default enabled)

games-board/tablebase-syzygy

6-pieces

Install tablebases for 6 pieces (huge!)

games-board/xboard

default-font

Install the default font that xboard uses

zippy

Enable experimental zippy client

games-emulation/atari800

encode-mp3

Support recording sound in MP3 format

games-emulation/desmume

gdb

Enable support for the remote GDB stub

openal

Use media-libs/openal for microphone input

wifi

Enable support for Wi-Fi (experimental and discouraged)

games-emulation/dolphin

discord-presence

Enables Discord Rich Presence, show the current game on Discord

evdev

Enable evdev input support

llvm

Enables LLVM support, for disassembly

log

Increase logging output

mgba

Enables GBA controllers emulation using libmgba.

games-emulation/dosbox

core-inline

Enable memory-increasing inlines for better performance but requiring more build time

glide

Enable unofficial Glide emulation via media-libs/openglide

games-emulation/dosbox-staging

dynrec

Use recompiling cpu core instead of dynamic x86/x64 specific cpu core

fluidsynth

use media-sound/fluidsynth for MIDI emulation

mt-32

use media-libs/munt-mt32emu for MT-32 emulation

network

Enable networking features (modem, ipx)

screenshot

Enable screenshots of rendered output using media-libs/sdl2-image

slirp

Enable Ethernet emulation using net-libs/libslirp

games-emulation/fceux

archive

Use app-arch/libarchive for 7zip support

ffmpeg

Use media-video/ffmpeg for video recording

x265

Use media-libs/x265 for video recording (HEVC)

games-emulation/gambatte-jg

jgmodule

Build module for The Jolly Good API

shared

Build shared library

games-emulation/generator

sdlaudio

Enable SDL Audio

games-emulation/hatari

capsimage

Use dev-libs/spsdeclib to read .IPF, .RAW, and .CTR disk images

capstone

Use dev-libs/capstone for disassembly output in the debugger

portmidi

Use media-libs/portmidi as an alternative MIDI backend

games-emulation/higan

gtk

Use GTK3 (Qt5 if disabled) user interface backend

games-emulation/jgemu

bsnes

Install bsnes for Super Nintendo

cega

Install Cega for SG-1000, Sega Master System and Game Gear

gambatte

Install Gambatte for Game Boy and Game Boy Color

geolith

Install Geolith for Neo Geo AES/MVS

jollycv

Install JollyCV for ColecoVision

mednafen

Install Mednafen for Atari Lynx, Nintendo Virtual Boy, NEC PC Engine, NEC SuperGrafx, Sony PlayStation, Sega Saturn, Super Nintendo, Neo Geo Pocket and WonderSwan

melonds

Install MelonDS for Nintendo DS

mgba

Install mGBA for Game Boy Advance

nestopia

Install Nestopia for Nintendo Entertainment System

prosystem

Install ProSystem for Atari 7800

sameboy

Install SameBoy for Game Boy and Game Boy Color

vecx

Install Vecx for Vectrex

games-emulation/m64py

7z

Ensure support for .7z archives.

rar

Ensure support for .rar archives.

games-emulation/mgba

discord

Enable Discord RPC support

elf

Enable the use of elf utils via dev-libs/elfutils

gles3

Build OpenGL ES 3.x RenderSystem

libretro

Build libretro port

games-emulation/mupen64plus

audio-sdl

Enable SDL audio plugin.

input-sdl

Enable SDL input plugin.

rsp-hle

Enable HLE RSP plugin.

ui-console

Enable default console UI.

ui-m64py

Enable PyQt5 UI using games-emulation/m64py.

video-glide64mk2

Enable Glide64mk2 video plugin.

video-rice

Enable Rice video plugin.

games-emulation/mupen64plus-core

debugger

Build the debugger

netplay

Enable netplay functionality

new-dynarec

Enable new experimental dynamic recompiler implementation (only for x86 and arm)

opencv

Support video capture via media-libs/opencv

osd

Overlay emulator messages using on-screen-display

games-emulation/mupen64plus-video-glide64mk2

hires

Support hi-resolution textures (requires dev-libs/boost)

games-emulation/pcsx2

clang

Use Clang compiler to build (the only compiler that is currently supported by upstream on Linux, do not report bugs if force-disabled)

sndio

Enable support for the media-sound/sndio backend

games-emulation/ppsspp

discord

Enable interfacing with a locally running Discord desktop client

games-emulation/rmg

angrylion-plugin

Enable the mupen64plus-video-angrylion-plus XMAME licensed plugin

discord

Enable Discord RPC support

dynarec

Enable the new dynarec for the mupen64plus-core plugin

rust-plugin

Enable the mupen64plus-input-gca rust plugin

games-emulation/snes9x

libretro

Build libretro port

netplay

Enable playing ROMs over the network (not recommended)

games-emulation/vbam

link

Enable GBA linking functionality

games-engines/devilutionx

sodium

Enable network packet encryption using dev-libs/libsodium

zerotier

Enable ZeroTier for online public games

games-engines/exult

fluidsynth

Compile with support for FluidSynth

tools

Enable tools, usercode compiler and mods support

games-engines/fheroes2

tools

Install development tools like 82m2wav and xmi2midi.

games-engines/frobtads

tads2compiler

Build TADS2 compiler

tads3compiler

Build TADS3 compiler

games-engines/love

gme

Use media-libs/game-music-emu to support additional music formats

games-engines/minetest

client

Build Minetest client

leveldb

Enable LevelDB backend

prometheus

Enable prometheus client support

redis

Enable redis backend via dev-libs/hiredis

server

Build Minetest server

spatial

Enable SpatialIndex AreaStore backend

games-engines/odamex

client

Build client target

hidpi

Use bundled FLTK 1.4, which has better support for HiDPI screens

master

Build master server target (advertises odamex server list)

odalaunch

Build the wxWidgets based launcher

portmidi

Enable PortMidi support

server

Build server target

games-engines/openmw

devtools

Install development tools like bsatool, esmtool and opencs.

osg-fork

Use OpenSceneGraph forked by OpenMW instead of upstream OSG.

games-engines/scummvm

fluidsynth

compile with support for fluidsynth

fribidi

Support for right-to-left languages via dev-libs/fribidi

mpeg2

enable mpeg2 codec for cutscenes

net

enable cloud support via media-libs/sdl2-net

sndio

Enable support for MIDI music using media-sound/sndio

unsupported

enable unsupported and/or broken game engines (you're on your own)

games-engines/scummvm-tools

tremor

Enable tremor, a fixed-point version of the Ogg Vorbis decoder

games-engines/solarus

doc

Install doxygen developer documentation.

games-fps/alienarena

vidmode

Link against x11-libs/libXxf86vm. Required for full-screen support.

games-fps/chocolate-doom

midi

basic support for MIDI files

games-fps/darkplaces

cdsound

Enables using CD audio in the engine

demo

Uses the demo data from quake1 (quake1-demodata)

lights

Install and setup the updated light maps

textures

Install and setup the updated textures

games-fps/doomsday

demo

Install launcher dor doom1.wad from games-fps/doom-data

display-mode

Include the ability to set the display mode

fluidsynth

Build the FluidSynth sound driver

freedoom

Install launcher for doom1.wad from games-fps/freedoom

tools

Build additional tools such as doomsday-shell, md2tool and texc

games-fps/duke3d-data

demo

Extract data files from the shareware version.

gog

Extract data files from the GOG.com version.

games-fps/eduke32

duke3d

Install the Duke Nukem 3D data files, provided by games-fps/duke3d-data.

fluidsynth

Install media-libs/sdl2-mixer with fluidsynth support.

hrp

Install the Duke Nukem 3D High Resolution Pack.

offensive

Install the Duke Nukem 3D XXX Pack.

opl

Install the Duke Nukem 3D OPL music files.

psx

Install the Duke Nukem 3D PSX high resolution voice files.

sc-55

Install the Duke Nukem 3D Roland SC-55 music files.

sdk

Install the SDK files.

server

Enable support for multiplayer.

tools

Install the support tools for mapster32.

voidsw

Enable support for Shadow Warrior (Classic) through VoidSW.

voxels

Install the Duke Nukem 3D Voxels Pack.

vpx

Enable support for media-libs/libvpx.

xmp

Enable support for media-libs/exempi.

games-fps/gzdoom

non-free

Enable non-free components

swr

Enable software renderer

games-fps/nexuiz

maps

Install the community map pack

games-fps/prboom-plus

dumb

Enable support for various tracker-style music formats via media-libs/dumb

fluidsynth

Enable support for MIDI via media-sound/fluidsynth

net

Enable support for network play

portmidi

Enable support for MIDI via media-libs/portmidi

sdl2-image

Enable support for high-resolution texture support via media-libs/sdl2-image

sdl2-mixer

Enable support for MIDI via media-libs/sdl2-mixer

server

Build PrBoom-Plus server

games-fps/quake2-icculus

demo

Install the demo files (quake2-demodata) and configure for use

qmax

Build the pretty version (quake max)

rogue

Build support for the 'Ground Zero' Mission Pack (rogue)

xatrix

Build support for the 'The Reckoning' Mission Pack (xatrix)

games-fps/quakeforge

client

Build Normal and QuakeWorld clients alongside the servers

wildmidi

Use media-sound/wildmidi for midi support

games-fps/redeclipse

dedicated

Install only as a dedicated game server

games-fps/rott

demo

Install the shareware version

games-fps/sauerbraten

server

Compile server support

games-fps/serioussam

alsa

Enable support ALSA sound.

pipewire

Enable support for pipewire.

vulkan

Enable support Vulkan render.

games-fps/turtlearena

mumble

Adds player-location (positional audio) support to VoIP

server

Build server target

voice

Adds VoIP support

games-fps/urbanterror

altgamma

Alternative way for gamma setting with modesetting driver

client

Build binary for client (includes code for non-dedicated server)

mumble

Use Mumble for ingame VoIP (experimental)

server

Build binary for dedicated server

skeetshootmod

Build support for skeetshoot mod for specific maps

voip

Use ioq3 ingame VoIP (experimental)

games-fps/worldofpadman

maps

Install extra maps (PadPack)

games-fps/xonotic

ode

Enable support for physics engine from dev-games/ode

games-fps/yamagi-quake2

client

Build client

ctf

Build support for the 'Capture The Flag' addon

gles

Build GLES3 renderer

rogue

Build support for the 'Ground Zero' Mission Pack

softrender

Build software renderer

vulkan

Build experimental Vulkan renderer

xatrix

Build support for the 'The Reckoning' Mission Pack

games-kids/gcompris

kiosk

Enable kiosk mode by default (for use by small children or on a self-service host machine)

games-misc/ponysay

fish-completion

Enable fish completion support

non-free

Install non-free ponies (i.e. from the MLP franchise)

games-misc/xcowsay

fortune

Enable support for fortune cookies via games-misc/fortune-mod

games-mud/tf

atcp

enable ATCP support.

gmcp

enable GMCP support.

option102

enable telnet option 102 support.

games-puzzle/gnome-tetravex

cli

Build the gnome-tetravex-cli command-line interface

gui

Build the gnome-tetravex graphical Gtk user interface

games-puzzle/nightsky

bundled-libs

Use the upstream provided bundled libraries.

games-puzzle/pingus

music

Enable playing of background music

games-puzzle/tiny-and-big

bundled-libs

Use the upstream provided bundled libraries.

games-puzzle/world-of-goo-gog

bundled-libs

Use bundled libs

games-puzzle/world-of-goo-hb

bundled-libs

Use bundled libs

games-roguelike/angband

sound

Enable and install sounds

games-roguelike/FTL

bundled-libs

Use bundled libraries.

games-roguelike/stone-soup

advpng

Use alternate png optimization.

ncurses

Enable for console (uses ncurses) based build. (can be enabled on top of tiles)

tiles

Enable for graphical (tiled) build. (can be enabled on top of ncurses)

games-roguelike/tomenet

client

Compile client

server

Compile server

games-rpg/daimonin-client

music

Install extra music

games-rpg/deponia-doomsday

bonus

Install the bonus content (Art Book, Concept Art, Soundtrack)

games-rpg/drascula

sound

Install optional audio files

games-rpg/dreamweb

doc

High-resolution scans of the written material in the original UK game box

games-rpg/freedroidrpg

devtools

Compile the additional dev tools

profile

Enable the integration of the ingame real-time profiler

games-rpg/hatoful-boyfriend

gui

Install the GUI for configuring screen resolution and input

games-rpg/hatoful-boyfriend-holiday-star

gui

Install the GUI for configuring screen resolution and input

games-rpg/kqlives

cheats

Enable cheating mode

games-rpg/manaplus

mumble

Enable support for voice chat

pugixml

Use dev-libs/pugixml for XML parsing isntead of dev-libs/libxml2

sdl2

Use libsdl2 instead of libsdl

games-rpg/the-longest-journey

hd

Install high definition backgrounds and sprites

hd-fmv

Install upscaled full motion videos

games-rpg/to-the-moon

bundled-libs

Use bundled libraries

games-simulation/corsix-th

midi

Adds support for background MIDI music via SDL_mixer

tools

Build tools for decoding RNC files

games-simulation/flightgear

dbus

Enable screensaver DBus interaction

gdal

Enable alternative terrain engine based on pagedLOD using sci-libs/gdal

qt5

Build Qt5 launcher application

udev

Enable event-based Input devices through virtual/udev

utils

Build various utilities (fgpanel, fgviewer among others)

games-simulation/openrct2

scripting

Enable the dev-lang/duktape scripting engine for executing user scripts.

games-simulation/openttd

allegro

Add support for Allegro

dedicated

Build only the openttd server, and not the client.

fluidsynth

Compile with support for FluidSynth

lzo

Enables LZO compression for savegames. This is only needed to load extremely old savegames. (versions before 0.2)

openmedia

Enables the free open media sets: OpenGFX, OpenSFX, OpenMSX, removing the requirement for proprietary TTD assets to play OpenTTD.

games-simulation/simutrans

midi

support for background MIDI music via media-sound/fluidsynth

minimal

Don't install any PakSets (scenario data)

games-simulation/simutrans-paksets

128

Install higher resolution scenario data (128 px graphics)

comic192

Install comic-like scenario data (192 px graphics)

cs128

Install Czech-Slovak scenario data (128 px graphics)

excentrique48

Install eccentric scenario data (48 px graphics)

german128

Install German scenario data (128 px graphics)

nippon64

Install Nippon scenario data (64 px graphics)

games-simulation/train-valley

gui

Install the GUI for configuring screen resolution and input

games-sports/speed-dreams

osggraph

Enable the new work-in-progress 3D engine using dev-games/openscenegraph

webstats

Enable support for sending racing statistics to a web server (experimental)

games-sports/xmoto

double-precision

more precise calculations at the expense of speed

games-strategy/0ad

editor

Include Atlas scenario editor projects

lobby

Enable the use of net-libs/gloox and the multiplayer lobby

nvtt

Support for some uncompressed data formats (might be needed for some mods)

games-strategy/colobot

devbuild

TODO

tools

Build tools

games-strategy/colobot-data

music

Enable music support

games-strategy/freeciv

gtk3

Build the gtk3 client

gtk4

Build the gtk4 client

json

Add support for JSON via dev-libs/jansson

mapimg

Additional mag image toolkit via media-gfx/imagemagick

modpack

Build the freeciv-modpack-program to download/install mods

rule-editor

Build ruleset editor

server

Enable server support. Disabling this will also make it impossible to start local games.

sound

Add support for sound provided by media-libs/sdl-mixer

system-lua

Use dev-lang/lua instead of the bundled liblua

web-server

Build the freeciv-web server in place of the freeciv server

games-strategy/freeorion

client

Build game client

games-strategy/freesynd

devtools

Build development tools

games-strategy/hedgewars

server

Enable local server

games-strategy/ja2-stracciatella

editor

Adds necessary file to run the editor

ru-gold

Support for russian gold ja2 version

games-strategy/megaglest

editor

Build map editor

fribidi

Enable FriBIDi support

model-viewer

Build model viewer

streflop

Use the library streflop. Out of synchs may occur if not enabled.

tools

Build model import/export tools

unicode

Use unicode strings for wxwidgets

wxuniversal

Use the wxUniversal port which implements the various GUI controls by drawing them itself

games-strategy/satellite-reign

gui

Install the GUI for configuring screen resolution and input

games-strategy/ufoai

client

Build the main game client

server

Build the dedicated server

games-strategy/uqm

music

download and install original 3DO music files

remix

download and install remixed music files (large)

voice

download and install voice files (large)

games-strategy/wargus

bne

Support extracting data from the Battle.net Edition

games-strategy/warzone2100

discord

Enable Discord presence/join integration

games-strategy/wesnoth

server

Enable compilation of server

games-util/gslist

web

Enable the web interface

games-util/heroic-bin

gamescope

Run Heroic Launcher inside gamescope

games-util/lgogdownloader

gui

Enable GUI login support for passing reCAPTCHA

games-util/sc-controller

trayicon

Enable system tray icon

games-util/slade

fluidsynth

Enable MIDI software synthesis using media-sound/fluidsynth

games-util/wit

fuse

Enable image mount support via fuse

gnome-base/gdm

bluetooth-sound

Allow loading of bluetooth sound modules. This may be necessary for accessibility screen readers, but may cause bluetooth sound issues for users logging in.

fprint

Enables experimental fingerprint authentication using sys-auth/fprintd

plymouth

Enable support for smooth transition from sys-boot/plymouth

gnome-base/gnome

classic

Install gnome-extra/gnome-shell-extensions for the Gnome Shell Classic mode

extras

Install additional GNOME applications

gnome-base/gnome-applets

tracker

Build the tracker search bar applet

gnome-base/gnome-control-center

gnome-online-accounts

Enable configuration panel for net-libs/gnome-online-accounts accounts

ibus

Enable support for enhanced input methods through app-i18n/ibus

gnome-base/gnome-extra-apps

games

Install Gnome Games

Install the gnome-extra/gnome-user-share personal file sharing tool

shotwell

Install the media-gfx/shotwell photo manager

tracker

Install the app-misc/tracker indexer and the GNOME packages that require it

gnome-base/gnome-keyring

ssh-agent

Use GNOME Keyring to unlock SSH keys. Recommended unless you are using ECDSA or Ed25519 keys.

gnome-base/gnome-light

gnome-shell

Install gnome-base/gnome-shell and x11-wm/mutter for the standard GNOME 3 desktop mode

gnome-base/gnome-session

elogind

Support sys-auth/elogind for session tracking

gnome-base/gnome-settings-daemon

elogind

Rely on sys-auth/elogind as runtime logind provider

modemmanager

Enable WWAN support via net-misc/modemmanager

systemd

Rely on sys-apps/systemd as runtime logind provider

gnome-base/gnome-shell

elogind

Use sys-auth/elogind for session tracking and suspend support.

ibus

Enable support for enhanced input methods through app-i18n/ibus

pipewire

Use pipewire to enable the camera monitor

gnome-base/gvfs

afp

Enables support for accessing AFP (Apple Filing Protocol) network shares

archive

Enables support for accessing files in archives transparently via app-arch/libarchive

bluray

Enable playback of Blu-ray filesystems using media-libs/libbluray

elogind

Use sys-auth/elogind for session tracking.

fuse

Enables fuse mount points in $HOME/.gvfs for legacy application access

gnome-online-accounts

Enable configuration panel for net-libs/gnome-online-accounts accounts

google

Enables support for accessing Google accounts via dev-libs/libgdata

http

Enable the HTTP/DAV backend using net-libs/libsoup

nfs

Enable NFS client support via net-fs/libnfs.

udev

Enable udev base replacement code for cdda feature

gnome-base/libgnomecanvas

glade

Enable glade support

gnome-base/librsvg

tools

Build svg viewer tool

gnome-base/nautilus

cloudproviders

Enable the cloudproviders support

gstreamer

Enable the Audio/Video file properties page

previewer

Use gnome-extra/sushi to preview files from the file mananger

sendto

Enable the nautilus-sendto extension to send files to various locations/devices

gnome-extra/cinnamon

internal-polkit

Use Cinnamon's internal polkit agent instead of gnome-extra/polkit-gnome. This does not currently support multi-user fast switching.

gnome-extra/cinnamon-control-center

modemmanager

Enable support for mobile broadband devices using net-misc/modemmanager

gnome-extra/cjs

sysprof

Enable profiling data capture support using dev-util/sysprof-capture

gnome-extra/eiciel

nautilus

Build gnome-base/nautilus extension

gnome-extra/evolution-data-server

berkdb

sys-libs/db support needed to migrate old (pre-3.13 evolution versions) addressbook data

gnome-online-accounts

Enable net-libs/gnome-online-accounts based Google authentication support

oauth-gtk3

Enable internal OAuth2 authentication for GTK+3 applications (libedataserverui-*.so) support for Google and Outlook.com. If gnome-online-accounts is enabled and used, this is not necessary, but both can be supported at the same time with different setup at runtime

oauth-gtk4

Enable internal OAuth2 authentication for GTK 4 applications (libedataserverui4-*.so) support for Google and Outlook.com. If gnome-online-accounts is enabled and used, this is not necessary, but both can be supported at the same time with different setup at runtime

weather

Enable optional weather calendar support

gnome-extra/gnome-commander

gsf

Add metadata support for OLE, OLE2 and ODF

pdf

Add metadata support for PDF

taglib

Add metadata support for ID3, Vorbis, FLAC and APE

gnome-extra/gnome-contacts

gnome-online-accounts

Enable net-libs/gnome-online-accounts based Google authentication support

gnome-extra/gnome-network-displays

firewalld

Install firewalld zones

gnome-extra/gnome-shell-extension-gsconnect

nautilus

Install Nautilus extension for sending files via GSConnect

gnome-extra/gnome-software

firmware

Enable firmware update support through sys-apps/fwupd

flatpak

Enable support for flatpak applications using sys-apps/flatpak

snap

Enable support for snap packages using app-containers/snapd

sysprof

Enable profiling data capture support using dev-util/sysprof-capture

gnome-extra/gnome-system-monitor

systemd

Display sys-apps/systemd metadata, e.g. unit names, for running processes

gnome-extra/libgda

canvas

Enable support for x11-libs/goocanvas

http

Enable embedded net-libs/libsoup based server

json

Enable support for JSON format

mdb

Enable support for Microsoft Access database using app-office/mdbtools

sourceview

Enable support for x11-libs/gtksourceview

gnome-extra/libgsf

gtk

Enable use of gdk in thumbnailer

gnome-extra/nemo

tracker

Add support for app-misc/tracker search

gnome-extra/nm-applet

modemmanager

Enable support for mobile broadband devices using net-misc/modemmanager

teamd

Enable teamd configuration editor

gnustep-apps/gemas

projectcenter

Build and install plugin for gnustep-apps/projectcenter

gnustep-apps/gworkspace

gwmetadata

Enable the metadata indexing and searching system

gnustep-apps/sogo

activesync

Build the ActiveSync support code

sodium

Enable support for Argon2 password schemes using dev-libs/libsodium

gnustep-base/gnustep-back-art

xim

Enable X11 XiM input method

gnustep-base/gnustep-back-cairo

xim

Enable X11 XiM input method

gnustep-base/gnustep-back-xlib

xim

Enable X11 XiM input method

gnustep-base/gnustep-make

libobjc2

Enables use of the GNUstep Objective-C runtime (gnustep-base/libobjc2) with non-fragile ABI and sys-devel/clang compiler

native-exceptions

Enables use of the native Objective-C exception support (@try/@catch/@finally) built-in objective-c exceptions with compilers that support it

gui-apps/foot

grapheme-clustering

Enable grapheme clustering support

gui-apps/grim

jpeg

Enable JPEG support.

gui-apps/gtkgreet

layershell

Enable layer shell support

gui-apps/kanshi

varlink

Enable remote control with varlink

gui-apps/mako

icons

Enable support for icons

gui-apps/swaybg

gdk-pixbuf

Support image types other than PNG

gui-apps/swayidle

elogind

Enable support for rootless session via elogind

gui-apps/swaylock

gdk-pixbuf

Enable additional image format support via the x11-libs/gdk-pixbuf library

gui-apps/waybar

evdev

Enable libevdev support for evdev related features

experimental

Enable experimental features, such as Bluetooth battery reporting

libinput

Enable libinput support for libinput related features

logind

Enable support for logind (bluetooth and idle inhibit)

mpd

Enable support for the Music Player Daemon

mpris

Enable support for mpris

network

Enable libnl support for network related features

pipewire

Enable support for pipewire

pulseaudio

Enable support for volume control via PulseAudio

sndio

Enable support for volume control via sndio

tray

Enable support for tray

wifi

Enable support for wifi/rfkill

gui-apps/waypipe

dmabuf

Use DMABUFs for data exchange and hardware decoding

ffmpeg

Link with ffmpeg to allow buffer displays using video streams

systemtap

Enable SystemTap/DTrace tracing

gui-apps/wayvnc

gbm

enable GPU-side screencopy (experimental)

tracing

Trace kernel and memory calls

gui-apps/wf-recorder

pipewire

Enable support for audio capture via media-video/pipewire.

pulseaudio

Enable support for audio capture via PulseAudio

gui-libs/gtk

broadway

Enable the GDK Broadway backend.

cloudproviders

Enable GtkPlacesSidebar to access cloud services

colord

Use x11-misc/colord for color management in printing

sysprof

Enable profiling data capture support using dev-util/sysprof-capture

gui-libs/gtksourceview

sysprof

Enable profiling data capture support using dev-util/sysprof-capture

gui-libs/libdecor

dbus

Enable dbus to query current cursor theme

examples

Build and install examples

gtk

Build GTK plugin

gui-libs/libhandy

glade

Install module and catalog for dev-util/glade

gui-libs/neatvnc

examples

Build and install examples

gbm

Enable support for the Generic Buffer Manager (gbm)

h264

Enable H.264 encoding

jpeg

Enable JPEG compression

tracing

Trace kernel and memory calls

websockets

Enable websockets support

gui-libs/vte

icu

Enable legacy charset support using dev-libs/icu

systemd

Support moving terminal child processes to their own systemd user scopes to avoid terminal getting killed due to child causing OOM

gui-libs/vte-common

systemd

Support moving terminal child processes to their own systemd user scopes to avoid terminal getting killed due to child causing OOM

gui-libs/wlroots

drm

Enable Direct Rendering Management

libinput

Enable support for input devices via dev-libs/libinput

liftoff

Enable support for libliftoff KMS plane backend

session

Enable session support (is required for DRM and libinput)

X

Enable support for X11 applications (XWayland)

x11-backend

Enable support for handling input/output devices through x11-libs/libxcb

xcb-errors

Better error reporting when using xwayland

gui-libs/xdg-desktop-portal-wlr

elogind

Enable support for rootless session via elogind

gui-wm/gamescope

libei

Enable emulated input using dev-libs/libei

pipewire

Enable screen capture via PipeWire

wsi-layer

Enable the WSI layer (required for HDR)

gui-wm/hyprland

legacy-renderer

Enable legacy renderer

gui-wm/sway

swaybar

Install 'swaybar': sway's status bar component

swaynag

Install 'swaynag': shows a message with buttons

tray

Enable support for StatusNotifierItem tray specification

wallpapers

Install sway's default wallpaper image

X

Enable support for X11 applications (XWayland)

gui-wm/wayfire

gles3

Enable OpenGL ES 3.x Features.

X

Enable support for X11 applications (XWayland).

kde-apps/akonadi

designer

Install plugin for dev-qt/designer

tools

Install tools for developers and testing

webengine

Enable support for system-wide defined KAccounts

kde-apps/analitza

eigen

Enable dev-cpp/eigen mathematical templates support

kde-apps/ark

zip

Enable ZIP archive support via dev-libs/libzip

kde-apps/cantor

julia

Enable dev-lang/julia backend support

qalculate

Enable sci-libs/libqalculate backend support

R

Enable dev-lang/R backend support

kde-apps/dolphin

activities

Track which folders are frequently accessed on a Plasma desktop

kde-apps/gwenview

activities

Enable kactivities support

fits

Enable support for NASA's sci-libs/cfitsio library

mpris

Enable support for MPRIS2 interface, requiring dev-qt/qtdbus as dependency.

Enable support for a share menu using kde-frameworks/purpose

kde-apps/k3b

webengine

Use dev-qt/qtwebengine for fancy k3bdiskinfoview

kde-apps/kalarm

pim

Enable birthday import, email functions etc. using kde-apps/akonadi

kde-apps/kalzium

editor

Enable the embedded molecule editor/viewer

solver

Enable the equation solver

kde-apps/kate-addons

filebrowser

Enable File System browser tool view

lspclient

Enable LSP (Language Server Protocol) client plugin

projects

Enable Project plugin for executing queries on SQL DBs

snippets

Enable Snippets Tool View plugin to manage or download code snippets

sql

Enable SQL plugin for executing queries on SQL DBs

kde-apps/kdeadmin-meta

cron

Installs KDE application for virtual/cron configuration

kde-apps/kde-apps-meta

accessibility

Pull in kde-apps/kdeaccessibility-meta packages

admin

Pull in kde-apps/kdeadmin-meta packages

education

Pull in kde-apps/kdeedu-meta packages

games

Pull in kde-apps/kdegames-meta packages

graphics

Pull in kde-apps/kdegraphics-meta packages

multimedia

Pull in kde-apps/kdemultimedia-meta packages

network

Pull in kde-apps/kdenetwork-meta packages

pim

Pull in KDE PIM suite

sdk

Pull in developer-specific meta-packages

utils

Pull in kde-apps/kdeutils-meta packages

kde-apps/kdecore-meta

Install kde-frameworks/purpose for share file context menu actions in kde-apps/dolphin

webengine

Enable www-client/falkon which depends on dev-qt/qtwebengine

kde-apps/kdeedu-meta

webengine

Enable packages requiring dev-qt/qtwebengine

kde-apps/kdegraphics-meta

color-management

Enable color management via media-libs/opencolorio

screencast

Pull in kde-apps/spectacle for screenshot/screenrecording support

webengine

Enable page scanning support via media-gfx/skanpage

kde-apps/kdemultimedia-meta

cdrom

Include packages for optical discs

kde-apps/kdenetwork-meta

bittorrent

Pull in net-p2p/ktorrent for BitTorrent protocol support

dropbox

Enable support for Dropbox in kde-apps/dolphin via kde-apps/dolphin-plugins-dropbox

samba

Enable support for net-fs/samba file sharing plugin from within file properties

screencast

Pull in kde-apps/krfb for Plasma desktop sharing support

webengine

Enable support for Google Drive integration via kde-misc/kio-gdrive

kde-apps/kdenlive

designer

Build plugins for dev-qt/designer

kde-apps/kdepim-addons

importwizard

Enable additional import plugins for kde-apps/akonadi-import-wizard

markdown

Enable Markdown support via app-text/discount

kde-apps/kdepim-meta

bogofilter

Install mail-filter/bogofilter for spam filter support in kde-apps/kmail

clamav

Install app-antivirus/clamav for virus detection support in kde-apps/kmail

spamassassin

Install mail-filter/spamassassin for spam filter support in kde-apps/kmail

kde-apps/kdesdk-meta

git

Enable support for Git VCS in kde-apps/dolphin via kde-apps/dolphin-plugins-git

mercurial

Enable support for Mercurial VCS in kde-apps/dolphin via kde-apps/dolphin-plugins-mercurial

subversion

Enable support for Apache Subversion VCS in kde-apps/dolphin via kde-apps/dolphin-plugins-subversion

webengine

Enable dev-util/kdevelop, requiring dev-qt/qtwebengine

kde-apps/kdeutils-meta

7zip

Install app-arch/p7zip for 7zip archive support in kde-apps/ark

gpg

Install kde-apps/kgpg which depends on kde-apps/akonadi

lrz

Install app-arch/lrzip for LRZ archive support in kde-apps/ark

rar

Install one of app-arch/rar, app-arch/unrar or app-arch/unar for RAR archive support in kde-apps/ark

webengine

Install app-editors/ghostwriter and kde-apps/kimagemapeditor, requiring dev-qt/qtwebengine

kde-apps/kget

bittorrent

Enable bittorrent transfer plugin through net-libs/libktorrent

gpg

Enable signature verification by GpgME++ via app-crypt/gpgme

mms

Enable MMS (Microsoft Media Server) plugin through media-libs/libmms

kde-apps/kig

geogebra

Support files created by sci-mathematics/geogebra-bin

scripting

Support Python scripting

kde-apps/kio-extras

activities

Enable activities KIO worker and fileitem plugin

ios

Enable AFC (Apple File Conduit) KIO worker for iOS devices support

kf6compat

Disable components colliding with KF6, depend on KF6 components instead

man

Enable manpages KIO worker

nfs

Enable NFS support using net-libs/libtirpc

phonon

Enable file audio preview plugin using media-libs/phonon

sftp

Enable SFTP protocol support using net-libs/libssh

taglib

Enable audio thumbnails via media-libs/taglib

X

Enable support for XCursor thumbnails via x11-libs/libX11

kde-apps/kleopatra

pim

Enable WKS publishing support using kde-apps/kmail

kde-apps/kmag

keyboardfocus

Enable keyboard focus tracking

kde-apps/konqueror

activities

Enable kactivities support

kde-apps/krdc

activities

Enable Plasma Activities support via kde-plasma/plasma-activities

kde-apps/ksystemlog

kdesu

Run as root using kdesu from kde-plasma/kde-cli-tools

kde-apps/ktouch

X

Enable support for X11 Keyboard Layout Detection

kde-apps/kwave

qtmedia

Enable playback via Qt5Multimedia

kde-apps/libkdepim

designer

Build plugins for dev-qt/designer

kde-apps/libkgapi

kf6compat

Disable components colliding with KF6, depend on KF6 components instead

kde-apps/libkleo

fancyviewer

Use kde-apps/kpimtextedit for an improved audit log viewer

kde-apps/libksane

kwallet

Enable encrypted storage of passwords with kde-frameworks/kwallet

kde-apps/mailcommon

designer

Build plugins for dev-qt/designer

kde-apps/marble

aprs

Enable support for APRS data sources

designer

Install plugin for dev-qt/designer

geolocation

Enable position information via dev-qt/qtpositioning

pbf

Enable OpenStreetMap PBF file support via dev-libs/protobuf

phonon

Enable sound support via media-libs/phonon

shapefile

Enable support for ESRI shapefiles

webengine

Use dev-qt/qtwebengine for embedded web browser

kde-apps/okular

crypt

Enable support for password-encrypted documents via kde-frameworks/kwallet

epub

Enable E-Book support via app-text/ebook-tools

markdown

Enable Markdown support via app-text/discount

mobi

Enable mobipocket support via kde-apps/kdegraphics-mobipocket

phonon

Enable sound support via media-libs/phonon

qml

Install Okular Qml components

Enable support for a share menu using kde-frameworks/purpose

kde-apps/parley

webengine

Build browser integration for the editor, requires dev-qt/qtwebengine

kde-apps/pimcommon

designer

Build plugins for dev-qt/designer

kde-apps/spectacle

Enable support for a share menu using kde-frameworks/purpose

kde-apps/step

qalculate

Enable the libqalculate library for unit conversion

kde-apps/thumbnailers

blender

Enable blender thumbnail generation using kde-frameworks/karchive

gettext

Enable PO file thumbnail generation using kde-apps/kdesdk-thumbnailers

mobi

Enable mobipocket thumbnail generation using kde-apps/kdegraphics-mobipocket

video

Enable video thumbnail generation using kde-apps/ffmpegthumbs

kde-apps/umbrello

php

Enable PHP import support using dev-util/kdevelop and dev-util/kdevelop-pg-qt

kde-apps/yakuake

absolute-position

Use kde-plasma/kwayland for absolute window positioning in KWin

kde-frameworks/kcompletion

designer

Build plugins for dev-qt/designer

kde-frameworks/kconfig

qml

Enable QML/QtQuick support via dev-qt/qtdeclarative

kde-frameworks/kconfigwidgets

designer

Build plugins for dev-qt/designer

kde-frameworks/kfilemetadata

epub

Enable support for reading EPUB ebook metadata

mobi

Enable mobipocket support via kde-apps/kdegraphics-mobipocket

kde-frameworks/kglobalaccel

kf6compat

Disable components colliding with KF6, depend on KF6 components instead

kde-frameworks/kguiaddons

kf6compat

Disable components colliding with KF6, depend on KF6 components instead

kde-frameworks/kiconthemes

designer

Build plugins for dev-qt/designer

kde-frameworks/kimageformats

eps

Support the EPS graphics file format

kde-frameworks/kinit

caps

Capabilities support for improved security and better OOM handling

kde-frameworks/kio

designer

Build plugins for dev-qt/designer

kwallet

Enable permanent storage of passwords for kpasswdserver with kde-frameworks/kwallet

kde-frameworks/kitemmodels

qml

Enable QML support via dev-qt/qtdeclarative

kde-frameworks/kitemviews

designer

Build plugins for dev-qt/designer

kde-frameworks/knewstuff

designer

Build plugins for dev-qt/designer

opds

Enable support for the Open Publication Distribution System via kde-frameworks/syndication

kde-frameworks/knotifications

phonon

Play notification sounds via media-libs/phonon instead of media-libs/libcanberra

qml

Enable QML support via dev-qt/qtdeclarative

speech

Enable text-to-speech notification support

kde-frameworks/knotifyconfig

phonon

Play notification sounds via media-libs/phonon instead of media-libs/libcanberra

kde-frameworks/kplotting

designer

Build plugins for dev-qt/designer

kde-frameworks/ktexteditor

editorconfig

Enable support for EditorConfig configuration files

kde-frameworks/ktextwidgets

designer

Build plugins for dev-qt/designer

kde-frameworks/kwallet

gpg

Support wallets with GnuPG encryption in addition to the default blowfish-encrypted file

kf6compat

Disable components colliding with KF6, depend on KF6 components instead

kde-frameworks/kwidgetsaddons

designer

Build plugins for dev-qt/designer

kde-frameworks/kxmlgui

designer

Build plugins for dev-qt/designer

kde-frameworks/networkmanager-qt

teamd

Enable Teamd control support

kde-frameworks/prison

qml

Enable QML/QtQuick support via dev-qt/qtdeclarative

kde-frameworks/purpose

kaccounts

Enable support for system-wide defined KAccounts

webengine

Enable support for system-wide defined KAccounts

kde-frameworks/sonnet

aspell

Enable the app-text/aspell spell-checking backend

designer

Build plugins for dev-qt/designer

hunspell

Enable the app-text/hunspell spell-checking backend

qml

Enable QML/QtQuick support via dev-qt/qtdeclarative

kde-misc/kdeconnect

pulseaudio

Enable system volume control plugin using media-libs/libpulse

telephony

Enable telephony plugin using kde-frameworks/modemmanager-qt

X

Enable remote input mousepad plugin using x11-libs/libfakekey

kde-misc/kio-gdrive

kf6compat

Disable components colliding with KF6, depend on KF6 components instead

Enable support for a share menu using kde-frameworks/purpose

kde-misc/krename

office

Enable support for file naming based on ODF metadata

kde-misc/tellico

bibtex

Add support for bibtex importing using btparse from dev-perl/Text-BibTeX

discid

Add support for reading disc IDs from audio CDs

yaz

Add support for searching Z39.50 databases

kde-plasma/discover

firmware

Enable support for firmware upgrades using sys-apps/fwupd

flatpak

Enable support for flatpak repositories using sys-apps/flatpak

snap

Enable support for snap packages using app-containers/snapd

webengine

Enable webflow support using dev-qt/qtwebview and dev-qt/qtwebengine instead of default URL handler

kde-plasma/drkonqi

systemd

Enable Coredumpd integration

kde-plasma/kde-cli-tools

kdesu

Build graphical frontend for kde-frameworks/kdesu

kde-plasma/kdeplasma-addons

alternate-calendar

Support alternate calendar systems (currently Chinese or Indian) via dev-libs/icu

Enable applet for quickly sharing data to a variety of sources

webengine

Enable dictionary and web browser applets using dev-qt/qtwebengine

kde-plasma/kinfocenter

usb

Show USB device information

kde-plasma/ksystemstats

networkmanager

Enable improved backend for Network statistics using kde-frameworks/networkmanager-qt

kde-plasma/kwin

lock

Enable screen locking via kde-plasma/kscreenlocker

screencast

Enable screencast portal using media-video/pipewire

shortcuts

Enable global shortcuts support via kde-plasma/kglobalacceld

kde-plasma/plasma-desktop

ibus

Use ibus input method via app-i18n/ibus

scim

Enable applets that use app-i18n/scim

webengine

Build the OpenDesktop integration plugin

kde-plasma/plasma-firewall

firewalld

Build net-firewall/firewalld backend

ufw

Build net-firewall/ufw backend

kde-plasma/plasma-meta

browser-integration

Enable integration with Chrome/Firefox with browser extensions

colord

Enable kde-plasma/kwin color management via x11-misc/colord

crash-handler

Pull in kde-plasma/drkonqi for assisted upstream crash reports

crypt

Pull in kde-plasma/plasma-vault for encrypted vaults integration

discover

Pull in resources management GUI; a centralised GHNS alternative and optional sys-apps/fwupd frontend

display-manager

Pull in a graphical display manager

firewall

Pull in kde-plasma/plasma-firewall for system firewall administration

flatpak

Pull in kde-plasma/flatpak-kcm for flatpak permissions administration

grub

Pull in Breeze theme for sys-boot/grub

gtk

Enable Breeze widget style and system settings module for GTK+

kwallet

Enable support for KWallet auto-unlocking via kde-plasma/kwallet-pam

oxygen-theme

Pull in Oxygen icons, sound theme and visual style for KDE Plasma

plymouth

Pull in Breeze theme for sys-boot/plymouth

pulseaudio

Install Plasma applet for PulseAudio volume management

qt5

Pull in required packages for seamless integration of KF5/Qt5-based applications

sddm

Pull in the x11-misc/sddm display manager and system settings module

sdk

Pull in kde-plasma/plasma-sdk for Plasma development

smart

Pull in kde-plasma/plasma-disks for disk health monitoring

thunderbolt

Pull in kde-plasma/plasma-thunderbolt control center module

unsupported

Allow packages that are known to ruin runtime experience ** DO NOT FILE BUGS WITH THIS ENABLED **

wacom

Pull in kde-plasma/wacomtablet control center module

wallpapers

Install wallpapers for the Plasma Workspace

webengine

Use kde-apps/khelpcenter to access the locally installed KDE Help System Handbook

xwayland

Enable Wayland windows screensharing to XWayland applications via gui-apps/xwaylandvideobridge

kde-plasma/plasma-nm

openconnect

Build support for the OpenConnect VPN client

teamd

Enable Teamd control support

kde-plasma/plasma-workspace

appstream

Enable AppStream software metadata support

geolocation

Enables dataengine providing location information

policykit

Enable locale generation and Users KCM using sys-auth/polkit and sys-apps/accountsservice

screencast

Enable screencast portal using kde-plasma/kpipewire

telemetry

Enable User Feedback control module for kde-plasma/systemsettings

wallpaper-metadata

Show metadata for image wallpaper plugin using kde-apps/libkexiv2

kde-plasma/powerdevil

brightness-control

Enable screen brightness control using app-misc/ddcutil

caps

Capabilities support for scheduled wakeup which can wake from suspend (CAP_WAKE_ALARM)

lxqt-base/liblxqt

backlight

Enable backlight control features.

lxqt-base/lxqt-config

monitor

Build monitor settings tool

touchpad

Build touchpad settings tool

lxqt-base/lxqt-meta

about

Install lxqt-base/lxqt-about

admin

Install lxqt-base/lxqt-admin

archiver

Install app-arch/lxqt-archiver

desktop-portal

Enable the LXQt sys-apps/xdg-desktop-portal backend implementation

display-manager

Install a graphical display manager

filemanager

Install x11-misc/pcmanfm-qt file manager

lximage

Install media-gfx/lximage-qt image viewer

minimal

Do not install x11-wm/openbox window manager

nls

Install dev-qt/qttranslations to better support different locales

powermanagement

Install lxqt-base/lxqt-powermanagement package

processviewer

Install x11-misc/qps package

screenshot

Install x11-misc/screengrab package

sddm

Install x11-misc/sddm display manager

ssh-askpass

Install lxqt-base/lxqt-openssh-askpass user password prompt tool

sudo

Install lxqt-base/lxqt-sudo

terminal

Install x11-terms/qterminal package

trash

Install gnome-base/gvfs to enable 'trash' functionality in x11-misc/pcmanfm-qt

window-manager

Install kde-plasma/kwin window manager

lxqt-base/lxqt-panel

colorpicker

Build colorpicker plugin

cpuload

Build cpuload plugin

desktopswitch

Build desktopswitch plugin

directorymenu

Build directorymenu plugin

dom

Build dom plugin

kbindicator

Build kbindicator plugin

mainmenu

Build mainmenu plugin

mount

Build mount plugin

networkmonitor

Build networkmonitor plugin

quicklaunch

Build quicklaunch plugin

showdesktop

Build showdesktop plugin

spacer

Build spacer plugin

statusnotifier

Build statusnotifier plugin

sysstat

Build sysstat plugin

taskbar

Build taskbar plugin

tray

Build tray plugin

volume

Build volume plugin

worldclock

Build worldclock plugin

mail-client/aerc

notmuch

Enable support for net-mail/notmuch

mail-client/alot

doc

Install user manual and API documentation

mail-client/alpine

chappa

enhance Alpine by applying Eduardo Chappa's patches

onlyalpine

installs only the alpine binary, so it does not collied with pico and/or pine

passfile

Adds support for caching passwords into a file between sessions

smime

Enable support for S/MIME

mail-client/balsa

rubrica

Adds support for rubrica addressbook

systray

Enable System Tray Icon support

mail-client/claws-mail

archive

Enable archiving plugin

bogofilter

Build mail-filter/bogofilter plugin

libcanberra

Enable sound notification in connection with USE=notification

libnotify

Enable notification on the desktop in connection with USE=notification

litehtml

Enable dev-libs/gumbo html viewer plugin

notification

Notification for new mail in different way, see also USE flags libcanberra, libindicate and libnotify

oauth

Enable OAuth2 authentication support

pgp

Enable PGP support

python

Enable plugin for Python scripting

sieve

Build plugin for sieve filter support

smime

Build plugin for S/MIME support

spamassassin

Build mail-filter/spamassassin plugin

spam-report

Enable plugin for spam reporting to various services

mail-client/evolution

archive

Enable archives support in attachments via app-arch/gnome-autoar

bogofilter

Build mail-filter/bogofilter plugin

geolocation

Enable support for displaying contacts on a map inside evolution using media-libs/libchamplain

highlight

Enable text highlighting plugin

ldap

Enable support for fetching contacts from an LDAP or Active Directory server using net-nds/openldap

spamassassin

Build mail-filter/spamassassin plugin

weather

Enable optional weather calendar support

ytnef

Enable optional TNEF attachments parser support using net-mail/ytnef

mail-client/geary

ytnef

Enable optional TNEF attachments parser support using net-mail/ytnef

mail-client/mutt

autocrypt

Enable autocrypt.org support

berkdb

Enable sys-libs/db database backend for header caching

gdbm

Enable sys-libs/gdbm database backend for header caching

gpgme

Build gpgme backend to support S/MIME, PGP/MIME and traditional/inline PGP

gsasl

Use GNU SASL via virtual/gsasl instead of Cyrus SASL (requires USE=sasl)

hcache

Enable header cache, one database backend needs to be enabled

lmdb

Enable dev-db/lmdb database backend for header caching

pgp-classic

Build classic_pgp backend to support PGP/MIME and traditional/inline PGP

pop

Enable support for POP3 mailboxes

smime-classic

Build classic_smime backend to support S/MIME

smtp

Enable support for direct SMTP delivery

tokyocabinet

Enable dev-db/tokyocabinet database backend for header caching

mail-client/neomutt

asan

Enable Address sanitizer for debugging

autocrypt

Enable autocrypt.org support

berkdb

Enable BDB (Berkley DB) backend for header caching

gdbm

Enable GDBM (GNU dbm) backend for header caching

gpgme

Build gpgme backend to support S/MIME, PGP/MIME and traditional/inline PGP

kyotocabinet

Enable Kyoto Cabinet database backend for header caching

lmdb

Enable LMDB (Lightning Memory-Mapped Database) backend for header caching

lz4

Add lz4 support for header cache compression

notmuch

Enable support for net-mail/notmuch

pgp-classic

Build classic-pgp backend to support PGP/MIME and traditional/inline PGP

qdbm

Enable QDBM (Quicker Database Manager) database backend for header caching

smime-classic

Build classic-smime backend to support S/MIME

tokyocabinet

Enable Tokyo Cabinet database backend for header caching

ubsan

Enable undefined behavior sanitizer for debugging

zlib

Add zlib support for header cache compression

zstd

Add zstd support for header cache compression

mail-client/roundcube

change-password

Allow users to change passwords through Roundcube

enigma

Add dependencies to support server-side GnuPG signing and/or encryption through the enigma plugin

fileinfo

Use the dev-lang/php fileinfo extension to guess the mime_type of attachments

ldap

Add dependencies to support connecting to an LDAP address book server

mail-client/s-nail

kerberos

If network is enabled, this adds support for GSSAPI login on IMAP through virtual/krb5.

net

Enable support for network protocols (POP, IMAP and SMTP). If you only need to send mail with the local Transport Agent, disabling this will get you support for only /usr/sbin/sendmail call.

ssl

If network is enabled, this adds support for S/MIME and SSL/TLS-powered protocols through dev-libs/openssl.

mail-client/thunderbird

clang

Use Clang compiler instead of GCC

eme-free

Disable EME (DRM plugin) capability at build time

hwaccel

Force-enable hardware-accelerated rendering (Mozilla bug 594876)

libproxy

Enable libproxy support

openh264

Use media-libs/openh264 for H.264 support instead of downloading binary blob from Mozilla at runtime

pgo

Add support for profile-guided optimization using gcc-4.5, for faster binaries. This option will double the compile time.

pulseaudio

Add sound server support via media-libs/libpulse (may be PulseAudio or Pipewire, or apulse if installed)

rust-extensions

Compile and install experimental rust extensions, that may become part of Thunderbird some day.

sndio

Enable support for the media-sound/sndio backend

system-av1

Use the system-wide media-libs/dav1d and media-libs/libaom library instead of bundled.

system-harfbuzz

Use the system-wide media-libs/harfbuzz and media-gfx/graphite2 instead of bundled.

system-icu

Use the system-wide dev-libs/icu instead of bundled.

system-jpeg

Use the system-wide media-libs/libjpeg-turbo instead of bundled.

system-libevent

Use the system-wide dev-libs/libevent instead of bundled.

system-librnp

Use system-wide dev-util/librnp instead of bundled one.

system-libvpx

Use the system-wide media-libs/libvpx instead of bundled.

system-png

Use the system-wide media-libs/libpng instead of bundled (requires APNG patches)

system-python-libs

Use system's python site instead of bundled python libraries

system-webp

Use the system-wide media-libs/libwebp instead of bundled.

wifi

Enable necko-wifi for NetworkManager integration, and access point MAC address scanning for better precision with opt-in geolocation services

mail-filter/amavisd-new

courier

Add courier support

dkim

Add DomainKeys Identified Mail support

qmail

Add qmail support

razor

Add support for mail-filter/razor

rspamd

Add support for mail-filter/rspamd extension (HTTP only)

rspamd-https

Add support for mail-filter/rspamd extension (both HTTP and HTTPS)

spamassassin

Add support for mail-filter/spamassassin

mail-filter/bogofilter

tokyocabinet

Enable Tokyo Cabinet database support

mail-filter/dcc

rrdtool

Enable net-analyzer/rrdtool interface scripts

mail-filter/libmilter

poll

Use poll instead of select

mail-filter/maildrop

authlib

Add courier-authlib support

dovecot

Add dovecot authentication support

tools

Install maildirmake and deliverquota tools

trashquota

Count deleted messages as part of the maildir quota

mail-filter/MailScanner

exim

Set mail-mta/exim to used MTA

postfix

Set mail-mta/postfix to used MTA

spamassassin

Enable usage of mail-filter/spamassassin for spam protection

mail-filter/mimedefang

poll

Use poll instead of select

mail-filter/opendkim

ldap

Enable openldap as a dataset facilitator or keys, determining domains to sign for, and any other dataset that opendkim supports.

lmdb

Add support for using dev-db/lmdb

lua

Enables control over signature verification, filtering and policy to be controlled by user defined lua scripts.

memcached

Add support for using dev-libs/libmemcached

opendbx

Use opendbx backend to facilitate dataset driven OpenDKIM configuration options like stats, bodylengthdb, etc. against a wide variety of database types

poll

Use poll() instead of select() for the provided asynchronous resolver library.

querycache

Add support for query caching (requires 'berkdb' flag)

sasl

Used to authenticate to a LDAP server in various ways if required.

stats

Add support for statistics (requires 'opendbx' flag)

unbound

Use the unbound dnssec library to perform DKIM DNS queries.

mail-filter/opendmarc

reports

Install the reports binaries: expire, import, reports, params

spf

Use the mail-filter/libspf2 for Sender Policy Framework checking

mail-filter/pyzor

gdbm

Enables the Gdbm back-end database engine for pyzord

mysql

Enables the MySQL back-end database engine for pyzord through dev-python/mysqlclient.

pyzord

Enable the pyzord server daemon

redis

Enables the redis back-end database engine for pyzord through dev-python/redis

mail-filter/rspamd

hyperscan

Enable hyperscan for fast regexp processing

jit

Enable PCRE JIT support

mail-filter/spamassassin

cron

Install a cron job to update SpamAssassin's rules daily.

qmail

Build qmail functionality and docs

mail-mta/courier

fax

Enables fax support in the courier mail server

norewrite

Prevents courier mail server from mangling virtual user addresses when sending

web

Enable the web interface

webmail

Enable the webmail interface

mail-mta/exim

arc

Adds support for Authenticated Receive Chain (ARC)

dane

Adds support for DNS-based Authentication of Named Entities

dcc

Adds support for Distributed Checksum Clearinghouse (DCC)

dkim

Adds support for DomainKeys Identified Mail (DKIM)

dlfunc

Install local_scan.h header to compile separate dlfunc libraries

dmarc

Adds support for DMARC

dnsdb

Adds support for a DNS search for a record whose domain name is the supplied query

dovecot-sasl

Adds support for Dovecot's authentication

dsn

Adds support for Delivery Status Notifications (DSN)

lmtp

Adds support for lmtp

mbx

Adds support for UW's mbx format

pkcs11

Require pkcs11 support in net-libs/gnutls with USE=gnutls

prdr

Adds support for Per-Recipient Data Response

proxy

Add support for being behind a proxy, such as HAProxy

redis

Adds support for querying dev-db/redis

spf

Adds support for Sender Policy Framework

srs

Adds support for Sender Rewriting Scheme

tdb

Use sys-libs/tdb for internal database storage (such as hints database)

tpda

Adds support for Transport Post-Delivery Actions

mail-mta/msmtp

daemon

Build/install msmtpd MTA daemon

mta

Enable this to install as system-wide MTA

mail-mta/netqmail

authcram

Enable AUTHCRAM support

gencertdaily

Generate SSL certificates daily instead of hourly

highvolume

Prepare netqmail for high volume servers

pop3

Include POP3 server

mail-mta/notqmail

gencertdaily

Generate SSL certificates daily instead of hourly

highvolume

Prepare notqmail for high volume servers

pop3

Include POP3 server

mail-mta/opensmtpd

mta

Enable this to install as system-wide MTA

mail-mta/postfix

dovecot-sasl

Enable net-mail/dovecot protocol version 1 (server only) SASL implementation

eai

Add support for SMTPUTF8

ldap-bind

Add support for binding to LDAP backend using dev-libs/cyrus-sasl

lmdb

Add support for using dev-db/lmdb for lookup tables

memcached

Add support for using net-misc/memcached for lookup tables

mongodb

Add support for using dev-db/mongodb for lookup tables

mail-mta/qpsmtpd

postfix

create user with permissions for proper postfix interaction

mail-mta/ssmtp

mta

Install symlinks for sendmail-compatible MTA.

mate-base/caja

mate

Install x11-themes/mate-icon-theme which is needed when this package is used in the MATE desktop environment.

mate-base/mate

base

Install base MATE Desktop applications that are recommended for the most common usage; for example, this installs the file manager. Disable this and other USE flags if you want a more minimal MATE Desktop.

extras

Install additional MATE Desktop applications that are recommended for extended usage of the MATE Desktop as upstream sees it; for example, this installs MATE Desktop's office related applications. Disable this if you plan to use your own non-MATE Desktop alternatives or a custom mixture of MATE and non-MATE packages.

help

Install gnome-extra/yelp to handle in application help menus and documentation browsing

notification

Force notification daemon to default to MATE's notification daemon. Enabled by default. Disable if it causes conflicts with other installed desktop environments.

themes

Install MATE Desktop's themes; if you use other themes, you can disable this to spare some space and time.

mate-base/mate-applets

cpupower

Enable support for cpu frequency manipulation using sys-power/cpupower

netlink

Use dev-libs/libnl

mate-base/mate-applets-meta

appindicator

Pull in mate-extra/mate-indicator-applet for AppIndicator applet

sensors

Pull in mate-extra/mate-sensors-applet for hw sensors applet

mate-base/mate-control-center

accountsservice

Add support for AccountsService

mate-base/mate-session-manager

gles2

Build with support for GLESv2 acceleration sessions

mate-base/mate-settings-daemon

rfkill

build support for rfkill

mate-extra/caja-extensions

cdr

Add an extension to burn files to cds using app-cdr/brasero.

gajim

Add an extension to support net-im/gajim.

image-converter

Add image conversion support.

mail

Add an extension to support e-mail functionality.

media

Add video audio extension with totem.

open-terminal

Add an extension to support an open terminal.

pidgin

Add an extension to support net-im/pidgin

Add an extension to support sharing files.

wallpaper

Add an extension to support setting an image as the current wallpaper

mate-extra/mate-polkit

accountsservice

Support extraction of data from AccountsService

mate-extra/mate-power-manager

applet

Enable building of the MATE applet.

mate-extra/mate-system-monitor

wnck

Enable experimental support using x11-libs/libwnck.

mate-extra/mate-tweak

dropdown

Support the x11-terms/tilda dropdown terminal emulator

mate-extra/mate-utils

applet

Enable the mate dictionary applet

media-fonts/corefonts

tahoma

Also install the Tahoma font. Due to the lack of a free bold variant, this may render badly. See bug 184790.

media-fonts/culmus

ancient

Install ancient semitic scripts

fancy

Install fancy fonts

fontforge

Use media-gfx/fontforge to build fonts from source

taamey

Install taamey fonts

media-fonts/dejavu

fontforge

Use media-gfx/fontforge to build fonts from source

media-fonts/fonts-meta

emoji

Install a font supporting emojis

latin

Install additional latin fonts

ms

Install (free) fonts for the "ms" preset

media-fonts/intlfonts

bdf

Install BDF fonts in addition to PCF

media-fonts/iosevka

iosevka

Install the classic Iosevka font.

iosevka-aile

Install Iosevka Aile, a quasi-proportional sans-serif font.

iosevka-curly

Install Iosevka Curly, a curlier variant of Iosevka.

iosevka-curly-slab

Install Iosevka Curly Slab, the curly font, with slab-serifs.

iosevka-etoile

Install Iosevka Etoile, a quasi-proportional slab-serif font.

iosevka-slab

Install Iosevka Slab, a monospace slab-serif font.

iosevka-ss01

Install Iosevka SS01, an Iosevka variant made in the style of Andale Mono.

iosevka-ss02

Install Iosevka SS02, an Iosevka variant made in the style of Anonymous Pro Style.

iosevka-ss03

Install Iosevka SS03, an Iosevka variant made in the style of Consolas.

iosevka-ss04

Install Iosevka SS04, an Iosevka variant made in the style of Menlo.

iosevka-ss05

Install Iosevka SS05, an Iosevka variant made in the style of Fira Mono.

iosevka-ss06

Install Iosevka SS06, an Iosevka variant made in the style of Liberation Mono.

iosevka-ss07

Install Iosevka SS07, an Iosevka variant made in the style of Monaco.

iosevka-ss08

Install Iosevka SS08, an Iosevka variant made in the style of Pragmata Pro.

iosevka-ss09

Install Iosevka SS09, an Iosevka variant made in the style of Source Code Pro.

iosevka-ss10

Install Iosevka SS10, an Iosevka variant made in the style of Envy Code R.

iosevka-ss11

Install Iosevka SS11, an Iosevka variant made in the style of X Windows Fixed.

iosevka-ss12

Install Iosevka SS12, an Iosevka variant made in the style of Ubuntu Mono.

iosevka-ss13

Install Iosevka SS13, an Iosevka variant made in the style of Lucida.

iosevka-ss14

Install Iosevka SS14, an Iosevka variant made in the style of JetBrains Mono.

iosevka-ss15

Install Iosevka SS15, an Iosevka variant made in the style of IBM Plex Mono.

iosevka-ss16

Install Iosevka SS16, an Iosevka variant made in the style of PT Mono.

iosevka-ss17

Install Iosevka SS17, an Iosevka variant made in the style of Recursive Mono.

iosevka-ss18

Install Iosevka SS18, an Iosevka variant made in the style of Input Mono.

media-fonts/liberation-fonts

fontforge

Use media-gfx/fontforge to build fonts from source

media-fonts/montecarlo

bdf

Install BDF fonts in addition to PCF

media-fonts/mplus-outline-fonts

ipafont

Generates new fonts merged with media-fonts/ja-ipafonts

media-fonts/noto

extra

Install full upstream font set including condensed, semi-bold, extra-light variants

media-fonts/noto-emoji

icons

Install Noto Emoji icon theme

media-fonts/terminus-font

a-like-o

Changes view of letter 'a' - a looks like o (see homepage)

center-tilde

Place the '~' character vertically centered on the line instead of to the top.

distinct-l

ll2 variant with more distinctive l (lowercase L)

otf

Install Open Type Font (OTF) (required for HarfBuzz backend)

pcf-8bit

Install Portable Compiled Font (PCF) (X11 bitmap fonts), 8-bit encodings

pcf-unicode

Install Portable Compiled Font (PCF) (X11 bitmap fonts), Unicode encodings

psf

Install PC Screen Font (PSF) with unicode data (for linux console)

quote

Changes view of quotes: symmetric ` and ' instead of asymmetric one (see homepage)

ru-dv

Changes view of Russian letters 'de' and 've' (see homepage)

ru-g

Changes view of Russian letter 'ge' (see homepage)

ru-i

Changes view of Russian letter 'i' - not like Latin u, but like "mirrored" N (see homepage)

ru-k

Changes view of Russian letter 'k' (see homepage)

media-fonts/unifont

fontforge

Use media-gfx/fontforge to build fonts from source

utils

Install unifont utilities

media-gfx/ahoviewer

plugins

Build plugin support for now, in future pull additional plugins

rar

Rar archive support

zip

Zip archive support

media-gfx/album

plugins

Install optional plugins

themes

Install optional themes

media-gfx/alembic

hdf5

Add support sci-libs/hdf5

test

Build and run the test-suite

media-gfx/asymptote

boehm-gc

Enables using the Boehm-Demers-Weiser conservative garbage collector

context

Enables support for ConTeXt format (dev-texlive/texlive-context)

curl

Enables running remote programs via net-misc/curl

lsp

Enables Language Server Protocol

offscreen

Enables off-screen rendering

sigsegv

Enables using dev-libs/libsigsegv

media-gfx/blender

alembic

Add support for Alembic through media-gfx/alembic.

bullet

Enable Bullet (Physics Engine).

collada

Add support for Collada interchange format through media-libs/opencollada.

color-management

Enable color management via media-libs/opencolorio.

cuda

Build cycles renderer with nVidia CUDA support.

cycles

Build cycles renderer (requires media-libs/openimageio and dev-libs/boost).

cycles-bin-kernels

Precompile the cycles render kernels for the CUDA/HIP/OneAPI backends, if they are enabled, at compile time. This makes it so that the user doesn't have to wait for the kernels to compile when they are used for the first time in Blender. If this option is not on, they will be built as needed at runtime.

dds

Adds DDS textures support to Blender.

embree

Use embree to accelerate certain areas of the Cycles render engine.

experimental

Build Experimental Blender Modules

fluid

Adds fluid simulation support via the built-in Mantaflow library.

headless

Build without graphical support (renderfarm, server mode only).

hip

Build cycles renderer with AMD HIP support.

nanovdb

Enable nanoVDB support in Cycles. Uses less memory than regular openVDB when rendering.

ndof

Enable NDOF input devices (SpaceNavigator and friends).

oidn

Enable OpenImageDenoiser Support

oneapi

Build OIDN with Intel oneAPI SyCL support

openimageio

Enable OpenImageIO Support

openpgl

Enable path guiding support in Cycles

opensubdiv

Add rendering support form OpenSubdiv from Dreamworks Animation through media-libs/opensubdiv.

openvdb

Enable openvdb for volumetric processing, like the voxel remesher. Also enables volumetric GPU preview rendering for Nvidia cards.

optix

Add support for NVIDIA's OptiX Raytracing Engine.

osl

Add support for OpenShadingLanguage scripting.

potrace

Add support for converting bitmaps into Grease pencil line using the potrace library.

pugixml

Enable PugiXML support (Used for OpenImageIO, Grease Pencil SVG export)

renderdoc

Build Blender with renderdoc support

tbb

Use threading building blocks library from dev-cpp/tbb.

vulkan

Add support for the experimental Vulkan viewport backend

media-gfx/chafa

tools

Build command-line tools

media-gfx/darktable

gamepad

Support using game controllers as input devices

geolocation

Enable geotagging support

kwallet

Enable encrypted storage of passwords with kde-frameworks/kwallet

lto

Enable link-time optimisations in the RawSpeed library

midi

Support using MIDI input devices such as Behringer X-Touch Mini, Arturia Beatstep or Korg nanoKONTROL2, as input devices

tools

Install tools for generating base curves and noise profiles

media-gfx/digikam

addressbook

Enable akonadi contact integration

imagemagick

Enable support for additional image formats such as XCF, FITS, HEIC etc.

lensfun

Enable support for media-libs/lensfun

panorama

Build the panorama plugin which requires media-gfx/hugin

semantic-desktop

Enable kde-frameworks/kfilemetadata support

video

Enable integrated video player

media-gfx/eog-plugins

map

Enable world map display using media-libs/libchamplain

media-gfx/eom

imagemagick

Use media-gfx/imagemagick as an external backend for the thumbnailer

media-gfx/exact-image

swig

Adds Swig support dev-lang/swig

media-gfx/exiv2

bmff

Add support for the ISOBMFF format

webready

Support reading metadata over the internet

media-gfx/fbida

fbcon

Install the framebuffer image viewer "fbi"

ghostscript

Install the framebuffer ghostscript viewer "fbgs"

X

Install the Motif based image viewer "ida"

media-gfx/fig2dev

ghostscript

Require app-text/ghostscript-gpl to export PDF an bitmap formats

media-gfx/fontforge

truetype-debugger

Enable truetype debugger in fontforge

woff2

Enable support for WOFF2 format

media-gfx/fotowall

webcam

Enable webcam support

media-gfx/freecad

addonmgr

Build the addon manager module for automatic handling of 3rd party addons

cloud

Build the Cloud workbench, to access cloud providers (mostly Amazon S3).

designer

Build and install the Qt designer plugin, so the FreeCAD widgets can be used from within designer.

fem

Build the FEM module and workbench which provides Finite Element Analysis (FEA) workflows

gui

Build FreeCAD with a Qt based GUI. If built without setting this USE flag, FreeCAD can be used in a headless mode, for server-side instances. The Python modules are available, without their GUI parts though, if this is unset.

idf

Build the IDF module to provide file exchange capabilities with IDF files

image

Build the image module and workbench for working with bitmap images

inspection

Build the inspection workbench which gives you specific tools for examination of shapes (experimental)

material

Build the material module and workbench to work with materials

netgen

Build support for the netgen mesher through media-gfx/netgen.

openscad

Build the OpenSCAD module for interoperability with OpenSCAD and repairing Constructive Solid Geometry (CSG) history

part-design

Build the part design module and workbench for build part shapes from sketches

path

Build the path module and workbench to procude G-Code instructions for CNC

pcl

Use external sci-libs/pcl for point clouds support.

points

Build the points module and workbench for working with point clouds

raytracing

Build the raytracing module and workbench for raytracing and rendering

robot

Build the robot module and workbench for studying robot movements

show

Build the show module, a helper module for visibility automation

smesh

Build the Salome SMESH module

surface

Build the surface module and workbench

techdraw

Build the techdraw module and workbench, a more advanced and feature-rich successor of the drawing workbench

tux

Build the Tux module

media-gfx/geeqie

ffmpegthumbnailer

Enable video thumbnail support with media-video/ffmpegthumbnailer

map

Enable items GPS map display

media-gfx/gimp

fits

Enable support for loading/exporting FITS images

vector-icons

Enable support for vector icons (experimental)

media-gfx/graphicsmagick

dynamic-loading

Compile graphicsmagick with dynamically loadable modules

fpx

Enable FlashPix support with media-libs/libfpx

q16

Set storage quantum size to 16 (~2*memory)

q32

Set storage quantum size to 32 (~5*memory)

zip

Build with dev-libs/libzip to support the OpenRaster (ORA) format.

media-gfx/graphviz

devil

Enables DevIL output plugin -Tdevil

gtk2

Enables gtk+ output plugin -Tgtk (needs cairo)

gts

Enables support for GNU Triangulated Surface Library (required for sfdp to work)

lasi

Enables PostScript output via media-libs/lasi, for plugin -Tlasi (needs cairo)

X

Builds unflatten, vimdot, builds plugin -Txlib, and enables support for x11 in various other modules (needs cairo)

media-gfx/gthumb

slideshow

Enable slideshow plugin

media-gfx/hugin

sift

automatically align images with media-gfx/autopano-sift-C

media-gfx/imagemagick

corefonts

Use media-fonts/corefonts which is required by some commands

fpx

Enable media-libs/libfpx support

hdri

Enable High Dynamic Range Images formats

lqr

Enable experimental liquid rescale support using media-libs/liblqr

pango

Enable Pango support using x11-libs/pango

q32

Set quantum depth value to 32

q8

Set quantum depth value to 8

media-gfx/imv

freeimage

Use media-libs/freeimage for additional image support

media-gfx/inkscape

cdr

Enable support for CorelDRAW files via media-libs/libcdr

dia

Enable DIA flow chart import via app-office/dia

inkjar

Enable support for OpenOffice.org SVG jar files

sourceview

Enable syntax highlighting support via x11-libs/gtksourceview

svg2

Enable support for new SVG2 features

visio

Enable support for Microsoft Visio diagrams via media-libs/libvisio

wpg

Enable support for WordPerfect graphics via app-text/libwpg

media-gfx/iscan-plugin-gt-f500

minimal

Install the firmware only, and not the plugin.

media-gfx/kphotoalbum

map

Enable map display support using kde-apps/marble

phonon

Enable media-libs/phonon video backend (known to crash on some video formats)

Enable support for a share menu using kde-frameworks/purpose

vlc

Enable media-video/vlc video backend (recommended for X11)

media-gfx/krita

color-management

Enable color management via media-libs/opencolorio

media

Enable sound support for animations via media-libs/mlt

mypaint-brush-engine

Enable MyPaint brush engine support media-libs/libmypaint

qtmedia

Enable sound support for animations via dev-qt/qtmultimedia

xsimd

Enable usage of SIMD instructions via dev-cpp/xsimd

media-gfx/librecad

tools

Build additional tool programs: tff2lff

media-gfx/luminance-hdr

fits

Enable support for the FITS format

media-gfx/mandelbulber

opencl

Enable GPU rendering support using OpenCL

media-gfx/meshlab

double-precision

Use double type instead of float type for scalars

media-gfx/netgen

logging

Enable logging through dev-libs/spdlog

opencascade

Enable OpenCASCADE support

media-gfx/nomacs

opencv

Build support for media-libs/opencv

plugins

Build officially support plugins

media-gfx/okularpart

epub

Enable E-Book support via app-text/ebook-tools

mobi

Enable mobipocket support via kde-apps/kdegraphics-mobipocket

media-gfx/openclipart

gzip

Compresses clip art using gzip

media-gfx/openscad

egl

Build using EGL instead of GLX

experimental

Enable experimental features

gamepad

Add support for gamepads through dev-qt/qtgamepad

gui

Enable or disable building of the GUI

hidapi

Build in support for HID-Class devices using dev-libs/hidapi

mimalloc

Build using dev-libs/mimalloc as memory allocator

spacenav

Add support for space navigator devices through dev-libs/libspnav

media-gfx/openvdb

abi10-compat

Disables newer features to maintain compatibility with ABI10

abi11-compat

Disables newer features to maintain compatibility with ABI11

abi12-compat

Disables newer features to maintain compatibility with ABI12

abi8-compat

Disables newer features to maintain compatibility with ABI8

abi9-compat

Disables newer features to maintain compatibility with ABI9

alembic

Add support for Alembic through media-gfx/alembic.

ax

Build the OpenVDB AX module to perform custom manipulation of OpenVDB data via an expression language: AX

blosc

Allow using blosc compression via dev-libs/c-blosc

cuda

Enable support for CUDA in NanoVDB

nanovdb

A lightweight, header only, and GPU friendly version of VDB

numpy

Build pyopenvdb with support for dev-python/numpy

utils

Build utility binaries

media-gfx/photoqt

devil

Support additional image formats using media-libs/devil

freeimage

Support additional image formats using media-libs/freeimage

mpv

Support for video files using media-video/mpv

media-gfx/plantuml

ant-task

Provides classes used to manage PlantUML Ant task

media-gfx/potrace

metric

default to a4 paper size and metric measurement

media-gfx/povray

io-restrictions

POV-Ray's mechanism for control of I/O operations

media-gfx/pqiv

archive

Enable support for images in archives and cbX comic book files

media-gfx/pstoedit

emf

Enable media-libs/libemf support

pptx

Enable support for generating PowerPoint pptx files

media-gfx/qimgv

opencv

Enable HQ scaling via media-libs/opencv

video

Add support for gif/webm playback via libmpv

media-gfx/qrencode

png

Enable PNG output support in qrencode tool

media-gfx/renderdoc

qt5

Build and install the qrenderdoc GUI

media-gfx/shotwell

opencv

Enable face detection via media-libs/opencv

media-gfx/skanpage

ocr

Enable support for Optical Character Recognition via app-text/tesseract

media-gfx/solvespace

system-mimalloc

Use system dev-libs/mimalloc instead of vendored library

media-gfx/ueberzugpp

opencv

Use media-libs/opencv for additional image formats and OpenCL accelerated scaling

wayland

Enable wayland support (proper window positioning is only supported with some compositors)

xcb-errors

Use x11-libs/xcb-util-errors for better error reporting with X

media-gfx/xpaint

pgf

Support for loading PGF images

media-gfx/yafaray

fastmath

Enable mathematic approximations to make code faster

fasttrig

Enable trigonometric approximations to make code faster

opencv

Add support for media-libs/opencv image processing.

media-libs/a52dec

djbfft

Prefer D.J. Bernstein's library for fourier transforms

media-libs/allegro

dumb

Enable media-libs/dumb module library support

physfs

Enable physfs support

vga

Enables the VGA graphics driver

media-libs/alsa-lib

alisp

Enable support for ALISP (ALSA LISP) interpreter for advanced features.

media-libs/alure

dumb

Enable media-libs/dumb module library support

fluidsynth

Enables Fluidsynth MIDI software synthesis

media-libs/assimp

collada

Add support for Collada interchange format through media-libs/opencollada

samples

Build viewer library

media-libs/aubio

double-precision

Compile in double precision mode.

media-libs/avidemux-core

system-ffmpeg

Use the ffmpeg provided by the system.

media-libs/avidemux-plugins

aften

Enable A/52 (AC-3) audio encoder support.

amr

Enable Adaptive Multi-Rate format support via media-libs/opencore-amr.

dcaenc

Enable DTS Coherent Acoustics audio encoder support via media-sound/dcaenc.

fdk

Adds support for encoding AAC using media-libs/fdk-aac.

fribidi

Enable unicode bidirectional algorithm support via dev-libs/fribidi.

twolame

Enable TwoLAME support via media-sound/twolame, an optimised MPEG Audio Layer 2 (MP2) encoder.

vpx

Enable WebM VP8 Codec SDK support via media-libs/libvpx.

x265

Enables HEVC support with media-libs/x265.

media-libs/cal3d

16bit-indices

Enables use of 16bit indices

media-libs/chromaprint

tools

Build and install fpcalc and fpcollect tools

media-libs/clutter

gtk

Use gdk-pixbuf from x11-libs/gtk+ as image rendering backend

media-libs/cogl

kms

Enable KMS support.

pango

Build cogl-pango library for x11-libs/pango integration

media-libs/coin

exceptions

Compile with C++ exceptions

qthelp

Build API documentation in QtHelp format

media-libs/cubeb

sndio

Enable support for the media-sound/sndio backend

media-libs/dav1d

10bit

Add support for building 10-bit and 12-bit AV1.

8bit

Add support for decoding 8-bit AV1.

xxhash

Enable dev-libs/xxhash support for hashing muxer

media-libs/devil

allegro

Add support for Allegro

media-libs/dumb

allegro

Add support for Allegro 4

media-libs/embree

compact-polys

Enables double indexed poly layout.

ispc

Build Embree with support for ISPC applications.

raymask

Enables ray mask support.

ssp

When enabled, Embree compiles with stack protection against return address overrides. Stack protection will wield a minor performance decrease in return for higher security.

tbb

Use TBB instead of the built-in Embree tasking system.

tutorial

Enable to build Embree tutorials programs.

media-libs/esdl

image

Enable image support

media-libs/fcft

harfbuzz

Use media-libs/harfbuzz for grapheme and run shaping

libutf8proc

Use media-libs/harfbuzz and dev-libs/libutf8proc for run shaping

media-libs/flickcurl

raptor

Use media-libs/raptor for proper RDF serializing

media-libs/freetype

adobe-cff

Use Adobe CFF as default font-renderer

bzip2

Support bzip2 compressed PCF fonts.

cleartype-hinting

Bytecode hinting mode for TrueType fonts that activates subpixel hinting (a.k.a. ClearType hinting) by default

fontforge

Install internal headers required for TrueType debugger in media-gfx/fontforge (built with USE=truetype-debugger)

harfbuzz

Use media-libs/harfbuzz for auto-hinting OpenType fonts. WARNING: may trigger circular dependencies!

infinality

Enable infinality options for improved LCD filtering

utils

Install utilities and examples from ft2demos

media-libs/freeverb3

forcefpu

Disable assembly code

plugdouble

Build plugins in double precision mode (default is float)

media-libs/ganv

fdgl

Use experimental force-directed graph layout

media-libs/gegl

lensfun

Enable support for media-libs/lensfun.

sdl2

Add support for Simple Direct Layer 2.0 (media-libs/libsdl2)

umfpack

Enable sparse solving via sci-libs/umfpack.

media-libs/glew

egl-only

Enable EGL support and disable X11 support

media-libs/glfw

wayland-only

Enable wayland support and disable X11 support

media-libs/gmmlib

custom-cflags

Do not override user CFLAGS like -march, -msse and similar with lib defaults. Not tested by upstream.

media-libs/grilo

playlist

Enable support for playlists through dev-libs/totem-pl-parser

media-libs/gst-plugins-bad

bzip2

Enable bzip2 encoder/decoder plugin

media-libs/gst-plugins-base

gbm

Enable Graphics Buffer Manager based EGL windowing system support (requires egl and at least one of gles or opengl)

gles2

Enable OpenGL library and plugin via GLESv2 API (requires egl)

ivorbis

Enable integer based vorbis decoder

opengl

Enable OpenGL library and plugin via desktop OpenGL API

pango

Enable pango GStreamer plugin

wayland

Enable Wayland EGL windowing system support (requires egl and at least one of gles2 or opengl)

X

Enable ximagesink and xvimagesink plugins; build GLX platform support if USE=opengl is enabled; build x11 windowing system support if USE=egl is enabled

media-libs/gstreamer

unwind

Enable sys-libs/libunwind usage for better backtrace support in leaks tracer module

media-libs/harfbuzz

experimental

Enable experimental APIs

glib

Enable dev-libs/glib unicode functions

graphite

Enable media-gfx/graphite2 complementary shaper

media-libs/imlib2

apidoc

Provide doxygen generated API docs

bzip2

Bzip2 loader support

eps

Eps image loader support

filters

Build filter functions (blur, sharpen, etc)

heif

Heif and Avif image loader support

mp3

ID3 loader support

packing

Enable structure packing. This will reduce memory footprint at the cost of unaligned memory access

shm

Use MIT shared memory support for X image transfer

text

Build text (TrueType font) functions

X

Use the X window system

zlib

Zlib loader support

media-libs/intel-mediasdk

tools

Build analyse and inspect tools

media-libs/jasper

heif

Enable experimental support for HEIF/HEIC, unsupported by upstream

media-libs/leptonica

utils

Install command-line utilities

media-libs/lib3mf

system-act

Use system-provided dev-go/act as code generator instead of package provided binaries. This flag will be removed after some time used for testing!

media-libs/libafterimage

shaping

Use MIT shaped X windows extention.

shm

Use MIT shared memory extention for X image transfer.

media-libs/libao

sndio

Add support for media-sound/sndio

media-libs/libass

libunibreak

Use dev-libs/libunibreak for Unicode line breaking algorithm

media-libs/libavif

aom

Enable support for the AOM codec encoding and decoding

dav1d

Enable support for the dav1d codec decoding

extras

Build extra apps (avifenc, avifdec) and test files

gdk-pixbuf

Build a gdk-pixbuf loader

rav1e

Enable support for the rav1e codec encoding

svt-av1

Enable support for the SVT-AV1 encoder

media-libs/libbdplus

aacs

Add support for decryption of AACS

media-libs/libbluray

aacs

Add support for decryption of AACS

bdplus

Use media-libs/libbdplus for BD+ decryption

java

Add support for BD-J

utils

Install command-line utilities and examples

media-libs/libcanberra

alsa

Enables ALSA sound driver.

gstreamer

Enables gstreamer sound driver. Not useful when alsa or pulseaudio is available.

gtk2

Enables building of gtk+ helper library, gtk+ runtime sound effects and the canberra-gtk-play utility. To enable the gtk+ sound effects add canberra-gtk-module to the colon separated list of modules in the GTK_MODULES environment variable.

gtk3

Enables building of gtk+3 helper library, gtk+3 runtime sound effects and the canberra-gtk-play utility. To enable the gtk+3 sound effects add canberra-gtk-module to the colon separated list of modules in the GTK_MODULES environment variable.

pulseaudio

Enables PulseAudio sound driver that should be able to support positional event sounds. This is the preferred choice for best sound events experience and picked by default if compiled in and possible to use at runtime.

sound

Install x11-themes/sound-theme-freedesktop to get sounds on Gnome and Xfce.

tdb

Enables Trivial Database support for caching purposes.

media-libs/libde265

dec265

Enable build of dec265 example program

enc265

Enable build of enc265 tool

sdl

Enable video output of dec265 example program with media-libs/libsdl

tools

Enable installation of varous binary tools

media-libs/libffado

test-programs

Install standalone test programs

media-libs/libggi

3dfx

Enables support for Voodoo chipsets, also called 3DFX and TDFX

vis

Enables sparc vis support for libggi

media-libs/libgphoto2

serial

Enable serial port support

media-libs/libgpod

gtk

Enable ArtworkDB support

media-libs/libheif

aom

Use media-libs/libaom for AVIF encoding/decoding

gdk-pixbuf

Enable x11-libs/gdk-pixbuf plugin

go

Enable building dev-lang/go code/examples

rav1e

Use media-video/rav1e for AVIF encoding

svt-av1

Use media-libs/svt-av1 for SVT-AV1 encoding

x265

Use media-libs/x265 for HEIF encoding

media-libs/libjxl

gdk-pixbuf

Build a gdk-pixbuf loader.

jpeg

Enable full support for JPEG images. When disabled, only lossless conversion between JPEG and JPEG-XL is supported.

media-libs/liblastfm

fingerprint

Build the lastfm-fingerprint library

media-libs/libmp4v2

utils

Install command-line utilities

media-libs/libmypaint

gegl

Add support for media-libs/gegl

media-libs/libopenglrecorder

openh264

Enable H.264 support using media-libs/openh264

vpx

Enable VP8/VP9 codec support via media-libs/libvpx

media-libs/libpagemaker

tools

Build command line file format conversion tools

media-libs/libpano13

suitesparse

Use Sparse Levenberg Marquardt algorithm instead of dense Levenberg Marquardt algorithm

media-libs/libplacebo

glslang

Use dev-util/glslang to compile GLSL

lcms

Add support for color management via media-libs/lcms

libdovi

Use media-libs/libdovi to read Dolby Vision metadata

shaderc

Use media-libs/shaderc to compile GLSL

xxhash

Use dev-libs/xxhash to speed up internal hashing

media-libs/libpng

apng

support unofficial APNG (Animated PNG) spec

media-libs/libprojectm

gles2

Provide support for OpenGL ES 2 and 3

media-libs/libpulse

asyncns

Use libasyncns for asynchronous name resolution.

doc

Build the doxygen-described API documentation.

glib

Add support to dev-libs/glib-based mainloop for the libpulse client library, to allow using libpulse on glib-based programs.

media-libs/libsdl

joystick

Control joystick support (disable at your own risk)

sound

Control audio support (disable at your own risk)

tslib

Build with tslib support for touchscreen devices

video

Control video support (disable at your own risk)

media-libs/libsdl2

fcitx

Enable support for app-i18n/fcitx

gles1

include OpenGL ES 1.0 support

haptic

Enable the haptic (force feedback) subsystem

ibus

Enable support for app-i18n/ibus

joystick

Control joystick support (disable at your own risk)

kms

Build the KMSDRM video driver

pipewire

Enable support for the media-video/pipewire audio backend

sndio

Enable support for the media-sound/sndio backend

sound

Control audio support (disable at your own risk)

video

Control video support (disable at your own risk)

media-libs/libshumate

sysprof

Enable sysprof-capture support for profiling

media-libs/libtgvoip

dsp

Enable signal processing (echo cancellation, noise suppression, and automatic gain control)

media-libs/libv4l

bpf

Enable support for IR BPF decoders

tracer

Build the v4l2-tracer tool and library

utils

Build the v4l-utils collection of utilities

media-libs/libva-compat

drm

Enables VA/DRM API support.

media-libs/libva-intel-driver

hybrid

Enable support for hybrid vaapi hardware acceleration on Intel Haswell and newer architectures

media-libs/libva-intel-media-driver

redistributable

Install redistributable media kernel binaries (no source code) files (primarily needed for video encoding support)

media-libs/libvisio

tools

Build conversion tools

media-libs/libvmaf

embed-models

Compile default vmaf models into the library (needs app-editors/vim-core)

media-libs/libvpl-tools

drm

Build with DRM support

media-libs/libvpx

highbitdepth

Enable 10 and 12 bit support for VP9.

postproc

Enable additional post processing filters

media-libs/libwebp

swap-16bit-csp

Enable byte swapping for 16 bit colorspace

media-libs/libzmf

tools

Build conversion tools

media-libs/lilv

tools

Build command line utilities

media-libs/lsp-plugins

lv2

Build lv2 plugins

vst

Support LinuxVST plugins

media-libs/lv2

plugins

Enables examples plugins.

media-libs/lvtk

gtk2

Enable x11-libs/gtk+:2 based GUI support

tools

Compile and install ttl2c tool

media-libs/mesa

d3d9

Enable Direct 3D9 API through Nine state tracker. Can be used together with patched wine.

llvm

Enable LLVM backend for Gallium3D.

lm-sensors

Enable Gallium HUD lm-sensors support.

opencl

Enable the Rusticl Gallium OpenCL state tracker.

osmesa

Build the Mesa library for off-screen rendering.

proprietary-codecs

Enable codecs for patent-encumbered audio and video formats.

vdpau

Enable the VDPAU acceleration interface for the Gallium3D Video Layer.

vulkan-overlay

Build vulkan-overlay-layer which displays Frames Per Second and other statistics

wayland

Enable support for dev-libs/wayland

xa

Enable the XA (X Acceleration) API for Gallium3D.

media-libs/mesa-amber

gles1

Enable GLESv1 support.

wayland

Enable support for dev-libs/wayland

media-libs/mlt

frei0r

Build the module for media-plugins/frei0r-plugins

opencv

Build motion tracking module using media-libs/opencv

python

Build SWIG bindings for Python

rtaudio

Builds rtaudio consumer for native audio support on multiple platforms

rubberband

Enable audio pitch-shifting using media-libs/rubberband

vidstab

Enabled video stabilization with media-libs/vidstab

media-libs/netpbm

rle

Build converters for the RLE format (utah raster toolkit)

media-libs/noise-suppression-for-voice

lv2

Enable the LV2 plugin

vst

Enable the VST plugin

vst3

Enable the VST3 plugin

media-libs/oidn

apps

Build the standalone denoise, self test, and benchmark binaries.

hip

Build OIDN with AMD HIP support.

openimageio

Enable OpenImageIO Support

media-libs/oneVPL-cpu

openh264

Use media-libs/openh264 instead of media-libs/x264

media-libs/openal

pipewire

Enable support for the media-video/pipewire audio backend

sndio

Enable support for the media-sound/sndio backend

media-libs/opencolorio

apps

Build the OCIO command line apps

media-libs/opencv

atlas

Use sci-libs/atlas for blas, lapack and sparse blas routines

contrib

Install user contributed scripts from opencv_contrib (Experimental!)

contribcvv

Enable CVV in contrib (requires Qt5)

contribdnn

Enable DNN module contrib (requires tinydnn)

contribfreetype

Enable Drawing UTF-8 strings with media-libs/freetype&media-libs/harfbuzz

contribhdf

Enable HDF module (requires sci-libs/hdf5)

contribovis

Enable OGRE vision module support (dev-games/ogre)

contribsfm

Enable SFM module (requires USE="eigen gflags glog")

contribxfeatures2d

Enables xfeatures2d and autodownload of samples in contrib

cuda

Enable NVIDIA Cuda computations support (Experimental!)

cudnn

Enable support for nVidia cuDNN library

dnnsamples

Enable dnn caffeemodel samples

eigen

Enable usage of dev-cpp/eigen for computations

features2d

Enable features2d module

gdal

Enable support for sci-libs/gdal library

gflags

Use Google's C++ argument parsing library (dev-cpp/gflags)

glog

Use Google's C++ logging library (dev-cpp/glog)

gtk3

Enable x11-libs/gtk+:3 support

jasper

Use media-libs/jasper for jpeg2k support

mkl

Use sci-libs/mkl for blas, lapack and sparse blas routines

non-free

Enable non-free components

opencvapps

Enable compilation with opencvapps

quirc

Enable qrcode decoding via media-libs/quirc

tbb

Enable multithreading with the Intel Threads Building Block (dev-cpp/tbb)

tesseract

Use Google's OCR Engine

testprograms

Build and install programs for testing OpenCV (performance)

video_cards_intel

Enable Video Acceleration API for hardware decoding for Intel cards

vtk

Build new 3D visualization module viz based on sci-libs/vtk

media-libs/openexr

large-stack

Enables code to take advantage of large stack support.

utils

Build several binary tools for verifying and manipulating EXR files.

media-libs/openh264

plugin

Install the Gecko Media Plugin (GMP) for use with Mozilla packages

utils

Install the CLI encoder and decoder utilities

media-libs/openimageio

dicom

Enable DICOM medical image file support via sci-libs/dcmtk

fits

Enable support for NASA's sci-libs/cfitsio library

gui

Build iv (with Qt5)

opencv

Enable OpenCV support via media-libs/opencv

openvdb

Enable OpenVDB support via media-gfx/openvdb

ptex

Enable Ptex texture mapping system file support via media-libs/ptex

qt6

Build iv with Qt6

tools

Build the command-line tools

media-libs/opensubdiv

glew

Enable support for OpenGL Extension Wrangler Library (media-libs/glew)

glfw

Build all example files that uses (media-libs/glfw)

ptex

Adds support for faster per-face texture mapping through media-libs/ptex

python

Use dev-lang/python to process source and documentation source files

tbb

Enable multithreading with the Intel Threads Building Blocks through dev-cpp/tbb

tutorials

Install the tutorials

media-libs/opus

custom-modes

Enable non-Opus modes, e.g. 44.1 kHz and 2^n frames

deep-plc

Enable Deep Packet Loss Concealment (PLC)

dred

Enable Deep REDundancy (DRED)

osce

Enable Opus Speech Coding Enhancement (OSCE)

media-libs/opusfile

fixed-point

Enable fixed-point arithmetic operations

float

Enable floating point arithmetic operations

http

Enable http connections

media-libs/osl

gui

Build the osltoy binary (with Qt5)

libcxx

Build against sys-libs/libcxx when using clang

nofma

Do not use Fuse-Multiply-Add operations

optix

Add support for NVIDIA's OptiX Raytracing Engine

partio

Use media-libs/partio

qt6

Build the osltoy binary (with Qt6)

media-libs/phonon

designer

Install plugin for dev-qt/designer

media-libs/portmidi

test-programs

Install various example programs

media-libs/quarter

designer

Install plugin for dev-qt/designer

qthelp

Build API documentation in QtHelp format

media-libs/quirc

opencv

Build tools requiring media-libs/opencv (inspect-opencv,quirc-demo-opencv)

sdl

Build tools requiring media-libs/sdl-gfx (inspect, quirc-demo)

tools

Build tools (qrtest)

v4l

Build tools for webcams (quirc-scanner)

media-libs/raptor

json

Enable support for JSON parsing

media-libs/raspberrypi-userland-bin

hardfp

Use armv6 hardfp ABI

media-libs/roc-toolkit

tools

Install helper tools like roc-conv, roc-recv, roc-send

media-libs/rubberband

jni

Enables building of Java Native Interface library

lv2

Add support for Ladspa V2

programs

Builds also executable applications

vamp

Enables vamp plugins support (Audio analysing plugins)

media-libs/sdl2-mixer

fluidsynth

Use media-sound/fluidsynth for MIDI support

midi

basic support for MIDI files

mod

basic support for MOD files

playtools

Install playwave and playmus tools (useful for testing)

tremor

enable OGG Vorbis music via libtremor

wav

support WAVE files

media-libs/sdl2-ttf

harfbuzz

Use media-libs/harfbuzz for enhanced font rendering

media-libs/sdl_audiolib

fluidsynth

Enable support for MIDI via media-sound/fluidsynth

mpg123

Enable support for mp3 decoding via media-sound/mpg123

openmpt

OpenMPT decoder via media-libs/libopenmpt

soxr

Enable SoX Resampler support via media-libs/soxr

wildmidi

Enable support for MIDI via media-sound/wildmidi

media-libs/sdl-mixer

fluidsynth

Use media-sound/fluidsynth for MIDI support

midi

basic support for MIDI files

mod

basic support for MOD files

playtools

Install playwave and playmus tools (useful for testing)

smpeg

Use media-libs/smpeg for MP3 support

wav

support WAVE files

media-libs/sge

image

enable sdl-image support

media-libs/spandsp

fixed-point

Enable fixed point support

media-libs/speex

utils

Enables speex commandline utilities (speexenc, speexdec).

vbr

Enable VBR support.

media-libs/suil

gtk2

Enable GTK2 based GUI support

media-libs/svgalib

kernel-helper

Build the helper kernel module

media-libs/tremor

low-accuracy

enable 32bit only multiply operations

media-libs/urt

tools

Install tools

media-libs/vips

archive

Enable support for compressed files using app-arch/libarchive

deprecated

Enable deprecated components

fits

Enable support for the Flexible Image Transport System data format using sci-libs/cfitsio

highway

Enable SIMD optimizations using dev-cpp/highway (replaces USE=orc)

imagequant

Enable support for Image Quantization using media-gfx/libimagequant

matio

Enable support for matlab files using sci-libs/matio

pango

Enable support for text rendering using x11-libs/pango

media-libs/vulkan-loader

layers

Include the vulkan layers

media-libs/waffle

wayland

Enable Wayland support

media-libs/x264

interlaced

enable interlaced encoding support, this can decrease encoding speed by up to 2%

pic

disable optimized assembly code that is not PIC friendly

media-libs/x265

10bit

Add support for producing 10bits HEVC.

12bit

Add support for producing 12bits HEVC.

numa

Build with support for NUMA nodes.

media-libs/xine-lib

bluray

Enable playback of Blu-ray filesystems using media-libs/libbluray

dav1d

Enable support for media-libs/dav1d AV1 decoder

dxr3

Enable support for DXR3 mpeg acceleration cards.

flac

Build the media-libs/flac based FLAC demuxer and decoder. This flag is not needed for playing FLAC content, neither standalone nor in Ogg container (OggFLAC), but might have better support for exotic features like 24-bit samples or 96kHz sample rates.

gtk

Build the gdkpixbuf-based image decoder plugin.

imagemagick

Build the ImageMagick-based image decoder plugin.

mad

Build the media-libs/libmad based mp3 decoder. This mp3 decoder has superior support compared to the one coming from FFmpeg that is used as a fallback. If you experience any bad behaviour with mp3 files (skipping, distorted sound) make sure you enabled this USE flag.

mmap

Use mmap() function while reading file from local disks. Using mmap() will use more virtual memory space, but leaves to the Kernel the task of caching the file's data. mmap() access should be faster, but might misbehave if the device where the file resides in is removed during playback.

nfs

Allow accessing NFS shares via net-fs/libnfs.

sftp

Use net-libs/libssh2 to access SFTP servers.

truetype

Use media-libs/freetype for font rendering and media-libs/fontconfig for font discovery. Enabling this USE flag will allow OSD (such as subtitles) to use more advanced font and to more easily select which font to use. The support for TrueType fonts in xine-lib is still experimental, and might not be as good looking as the bitmap fonts used with this USE flag disabled.

vdr

Build the VDR plugin

vidix

Enable support for vidix video output.

vis

Adds support for SIMD optimizations for UltraSPARC processors.

vpx

Enable VP8 codec support via media-libs/libvpx.

xvmc

Enable support for XVideo Motion Compensation (accelerated mpeg playback).

media-libs/xvid

pic

disable optimized assembly code that is not PIC friendly

media-libs/zita-resampler

tools

Install zresample and zretune tools

media-libs/zmusic

fluidsynth

Enable support for MIDI via media-sound/fluidsynth

mpg123

Enable support for MPEG audio playback via media-sound/mpg123

media-plugins/alsa-plugins

arcam_av

Enables Arcam AV control plugin

mix

Enables upmix and vdownmix plugin

usb_stream

Enables usb_stream plugin

media-plugins/audacious-plugins

ampache

Support controlling audacious via ampache

bs2b

Enable Bauer Bauer stereophonic-to-binaural headphone filter

cue

Support CUE sheets using the libcue library

fluidsynth

Support FluidSynth as MIDI synth backend

gme

Support various gaming console music formats

http

Support HTTP streams through neon

openmpt

Add support for OpenMPT

pipewire

Build the PipeWire output plugin

scrobbler

Build with scrobbler/LastFM submission support

soxr

Build with SoX Resampler support

speedpitch

Enable speed/pitch effects

streamtuner

Build the streamtuner plugin

media-plugins/calf

experimental

Enable experimental features/plugins

lv2

Add support for Ladspa V2

media-plugins/frei0r-plugins

facedetect

Enables building of facedetect plugin, which depends on media-libs/opencv

scale0tilt

Enables building of scale0tilt and vectorscope plugins, which depend on media-libs/gavl

media-plugins/gkrellmpc

threads

Use separate thread to init connection (unsafe)

media-plugins/grilo-plugins

chromaprint

Enable Chromaprint support

daap

Enable dmap support through net-libs/libdmapsharing

flickr

Enable Flickr support

freebox

Build support for viewing TV channels using Freebox

gnome-online-accounts

Enable net-libs/gnome-online-accounts support

thetvdb

Build support for thetvdb.com

tracker

Build support for content discovery using the app-misc/tracker indexer

youtube

Build support for YouTube content discovery using dev-libs/libgdata

media-plugins/gst-plugins-gtk

gles2

Enable gtkglsink OpenGL sink based on GLESv2 API

opengl

Enable gtkglsink OpenGL sink based on desktop OpenGL API

media-plugins/gst-plugins-meta

http

Enable http streaming via net-libs/libsoup

libvisual

Enable visualization effects via media-libs/libvisual

vpx

Enables vp8 codec support using libvpx, required to play some HTML5 videos

media-plugins/gst-plugins-vaapi

drm

Enable DRM renderer

gles2

Enable GLESv2 and GLESv3 support

media-plugins/imlib2_loaders

xcf

Enable XCF image loader

media-plugins/ir_lv2

tools

Build convert4chan tool

media-plugins/mpg123-output-plugins

int-quality

Use rounding instead of fast truncation for integer output, where possible

media-plugins/vdr-cdplayer

cdparanoia

Enable cdparanoia (audio CD ripper) support

media-plugins/vdr-dvbapi

dvbcsa

use media-libs/libdvbcsa free implementation of the DVB Common Scrambling Algorithm

media-plugins/vdr-epgsearch

conflictcheckonly

install the "conflictcheckonly" vdr-plugin

epgsearchonly

install the "epgsearchonly" vdr-plugin

quicksearch

install the "quicksearch" vdr-plugin

tre

Add support for unlimited fuzzy searching with help of dev-libs/tre library

media-plugins/vdr-streamdev

client

Compile the VDR plugin vdr-streamdev-client that can connect a vdr to a remote streamdev-server instance

server

Compile the VDR plugin vdr-streamdev-server that allows remote systems to access the vdr using streamdev-specific VTP and HTTP protocol

media-plugins/vdr-vdrmanager

stream

Add support for streaming Video to Android client

media-plugins/vdr-weatherng

dxr3

enables lower osd color depth for dxr3 cards

media-plugins/vdr-xineliboutput

bluray

Enable BluRay metadata support through media-libs/libbluray

cec

Enable CEC support through dev-libs/libcec

vdr

Compile the vdr output plugin to use local or remote xine as output

xine

Compile the xine input plugin for displaying vdr video and OSD

media-radio/ax25-tools

X

Enable some X based configuration tools.

media-radio/chirp

radioreference

pull in optional deps for query of radioreference

media-radio/direwolf

hamlib

Enables support by the Hamlib amateur radio rig control library

media-radio/fldigi

hamlib

Enables support by the Hamlib amateur radio rig control library to get/set frequency and mode of the ham radio in use

media-radio/svxlink

qt5

Build and install qtel application

rtlsdr

Add support for rtlsdr hardware

media-radio/tucnak

hamlib

Enables support by the Hamlib amateur radio rig control library to get/set frequency and mode of the ham radio

rtlsdr

Add support for rtlsdr hardware

media-radio/unixcw

ncurses

Enables building the curses based morse code tutor program 'cwcp'.

media-radio/xastir

geotiff

Install geotiff support. Allows using USGS DRG topo maps or other types of geotiff mapes/images

media-sound/abcde

aiff

Enable support for Audio Interchange File Format (AIFF) output encoding

id3tag

Support ID3, ID3v2 tagging of audio files

mac

Enable support for Monkey's Audio files

normalize

Add support for normalizing audio file volume levels

replaygain

Support for Replay Gain metadata, for relative volume adjustment

media-sound/abcm2ps

pango

Use the pango library to render fonts with non-latin characters

media-sound/alsaplayer

id3tag

Enables ID3 tagging with id3tag library

media-sound/alsa-utils

bat

install basic audio tester (BAT) util

libsamplerate

install utils that use libsamplerate (e.g. alsaloop)

ncurses

install utils that use ncurses (e.g. alsamixer)

media-sound/amsynth

dssi

Enable support for DSSI Soft Synth Interface

lv2

Add support for Ladspa V2

nsm

Build support for Non Session Manager

vst

Build VST plug-in

media-sound/apulse

sdk

Install PulseAudio headers and pkg-config files. Be aware apulse is not a full PulseAudio replacement by design and some functionality may be missing.

USE flags

acct-user/git

gitea

gitolite

acct-user/vdr

graphlcd

legacy-homedir

remote

serial

app-accessibility/at-spi2-core

dbus-broker

app-accessibility/brltty

api

beeper

fm

louis

midi

pcm

app-accessibility/emacspeak

espeak

app-accessibility/espeak-ng

async

klatt

l10n_ru

l10n_zh

man

mbrola

app-accessibility/flite

voices

app-accessibility/freetts

jsapi

mbrola

app-accessibility/orca

braille

app-accessibility/speech-dispatcher

espeak

flite

app-admin/clsync

apidoc

cgroups

clsync

cluster

control-socket

extra-debug

extra-hardened

gio

highload-locks

namespaces

socket-library

app-admin/conky

apcupsd

bundled-toluapp

cmus

colour-name-map

extras

ical

intel-backlight

iostats

irc

lua-cairo

lua-cairo-xlib

lua-imlib

lua-rsvg

math

moc

mouse-events

mpd

nvidia

portmon

thinkpad

webserver

xinput

xmms2

app-admin/conserver

freeipmi

app-admin/diradm

automount

irixpasswd

app-admin/doas

persist