Global USE flags

Flag	Description	Packages
asm	Enable x86_64 assembly optimisation	6
doc		3
examples		4
experimental	Allow experimental USE flags	3
git-src	Fetch sources using dev-vcs/git	0
man		5
python		2
static-libs		2
test		16
test-full	Run tests that take a long time	4

Category USE flags

dev-libs

Flag	Description	Packages
amd64		2
arm		2
ecdh	Enable ECDH shared secret computation	2
ellswift	Enable ElligatorSwift encoding for public keys	2
extrakeys	Enable extrakeys module	2
lowmem	Reduce runtime memory usage at the expense of performance (ecmult window size 4, gen precision 2)	2
musig	Enable MuSig2 module	2
recovery	Enable ECDSA pubkey recovery module	2
valgrind	Compile in valgrind memory hints	2

net-p2p

Flag	Description	Packages
berkdb	Support legacy wallets in Berkeley DB format	3
cli	Build and install bitcoin-cli command line interface	3
daemon	Build and install bitcoind daemon	3
dbus		3
external-signer	Include support for external wallet signer programs	3
gui	Build and install Elements-Qt GUI	3
nat-pmp	Enable NAT-PMP port forwarding	2
qrcode	Enable generation of QR Codes for receiving payments	4
sqlite	Support descriptor wallets in SQLite format	4
system-libsecp256k1	Link with <pkg>dev-libs/libsecp256k1-zkp</pkg> rather than embedding an internal copy	3
systemtap	Enable SystemTap/DTrace tracing	3
upnp	Enable Universal Plug and Play	3
zeromq	Report blocks and transactions via zeromq	3

Local USE flags

dev-libs

leveldb

Flag	Description
snappy
tcmalloc

libbech32

Flag	Description
blech32	Enable support for Blech32/Blech32m encodings.
cxx

libsecp256k1

Flag	Description
schnorr	Enable Schnorr signature module
silentpayments

libsecp256k1-zkp

Flag	Description
bppp	Enable Bulletproofs++ module
ecdsa-adaptor	Enable ECDSA adaptor module
ecdsa-s2c	Enable ECDSA sign-to-contract module
external-default-callbacks	Enable external default callback functions
generator	Enable NUMS generator module
rangeproof	Enable Pedersen / zero-knowledge range proofs module
schnorrsig	Enable Schnorr signature module
surjectionproof	Enable surjection proof module
whitelist	Enable key whitelisting module

net-libs

libwally-core

Flag	Description
elements	Enable support for Elements assets
minimal

net-misc

bfgminer

Flag	Description
adl	Enable support for controlling fans and overclocking on AMD cards with AMD Display Library
alchemist	Enable support for mining with AlcheMist
avalon	Enable support for mining with Avalon 1 ASIC modules
avalonmm	Enable support for mining with Avalon 2/3 ASIC modules
bfsb	Enable support for mining on BFSB host Raspberry Pi
bfx	Enable support for mining with BFx2 USB sticks
bifury	Enable support for mining with Bi*fury USB sticks
bigpic	Enable support for mining with Big Picture Mining USB sticks (Red/BlueFury, BF1, etc)
bitforce	Enable support for mining with ButterFly Labs BitFORCE ASICs and/or FPGAs
bitfury	Enable support for mining with 55nm Bitfury-based devices
bitmain	Enable support for mining with Bitmain Antminer S* series
cointerra	Enable support for mining with CoinTerra TerraMiner.
cpumining	Enable support for mining with CPUs
drillbit	Enable support for mining with Drillbit boards
dualminer	Enable support for mining with DualMiner USB sticks
gridseed	Enable support for mining with 5-chip GridSeed orbs
hardened
hashbuster	Enable support for mining with HashBuster nano boards
hashbuster2	Enable support for mining with HashBuster micro boards
hashfast	Enable support for mining with HashFast devices
icarus	Enable support for mining with Icarus-compatible devices (including Block Erupter Sapphire ASICs)
jingtian	Enable support for mining on JingTian boards via SPI/GPIO
keccak	Enable support for mining with Keccak miners
klondike	Enable support for mining with Klondike USB miners
libusb	Use libusb
littlefury	Enable support for mining with LittleFury USB sticks
lm-sensors
metabank	Enable support for mining on Metabank host Raspberry Pi
minion	Enable support for mining on minion chips via SPI (BlackArrow Prospero)
modminer	Enable support for mining with ModMiner FPGAs
nanofury	Enable support for mining with NanoFury USB sticks
ncurses
opencl	Enable support for mining with OpenCL-capable devices (GPUs)
proxy	Enable support for virtual proxy device
proxy_getwork	Enable proxy support for getwork protocol (often used with Block Erupter Blades)
proxy_stratum	Enable proxy support for stratum protocol
rockminer	Enable support for mining with RockMiner devices
screen	Provide start-bfgminer.sh script to launch BFGMiner in <pkg>app-misc/screen</pkg>
scrypt	Enable support for scrypt mining algorithm
sha256d	Enable support for SHA256d mining algorithm
twinfury	Enable support for mining with Twinfury USB sticks
udev
udev-broad-rules	Enable broader udev rules that may match non-mining devices
unicode
x6500	Enable support for mining with X6500 FPGAs
zeusminer	Enable support for mining with ZeusMiner units
ztex	Enable support for mining with Ztex FPGAs

net-p2p

bitcoin-core

Flag	Description
wallet	Support creating and loading wallets

bitcoin-knots

Flag	Description
bitcoin_protocol_rdts	Enables the BIP110 (RDTS) network upgrade, which fixes critical vulnerabilities in long-standing network design
libs	Build and install libbitcoinconsensus
qt6
system-leveldb	Link with <pkg>virtual/bitcoin-leveldb</pkg> rather than embedding an internal copy
tor-subprocess	Run dedicated Tor subprocess

core-lightning

Flag	Description
${POSTGRES_REQ_USE/||/^^}
${PYTHON_REQUIRED_USE}
debug
developer	Enable dangerous commands intended for developer use only.
mkdocs	Use dev-python/mkdocs to build documentation.
postgres
rust	Build Rust components

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