Global USE flags

Flag Description Packages
cpu_flags_x86_sse2 2
debug 22
designer Pull in bindings for the QtDesigner module and enable the designer plugin 2
doc 3
fuse Enable FUSE support 2
gui Pull in bindings for the QtGui module 3
lz4 Enable support for compressed pcap logging using the LZ4 algorithm 2
man install man pages 2
nls 21
openmp 2
pcre 2
python 17
spread Add support for <pkg>net-misc/spread</pkg> 2
ssl 2
static 2
static-libs 7
systemd 2
test 16
threads 18
udev 2
unicode 12
zlib 2

Category USE flags

app-forensics

Flag Description Packages
aff Enable extra aff formats 2
ewf Enable libewf support 2

sci-biology

Flag Description Packages
custom-cflags 2

Local USE flags

app-forensics

sleuthkit

Flag Description
java

dev-libs

libusb

Flag Description
examples

dev-python

qtpy

Flag Description
bluetooth
dbus
help Pull in bindings for the QtHelp module
multimedia Pull in QtMultimedia and QtMultimediaWidgets modules
network Pull in bindings for the QtNetwork module
nfc Pull in bindings for the QtNFC module
opengl Pull in bindings for the QtOpenGL module
pdfium Pull in bindings for the QtPDFium module
positioning Pull in bindings for the QtPositioning module
printsupport Pull in bindings for the QtPrintSupport module
pyqt6 Use <pkg>dev-python/pyqt6</pkg> as Qt for Python implementation
pyside6 Use <pkg>dev-python/pyside</pkg> as Qt for Python implementation
qml Build bindings for the QtQml
quick Build bindings for the QtQuick
quick3d Build bindings for the QtQuick3D
remoteobjects Pull in bindings for the QtRemoteObjects module
scxml Pull in bindings for the QtScXml module
sensors Pull in bindings for the QtSensors module
serialport Pull in bindings for the QtSerialPort module
spatialaudio Pull in bindings for the QtSpatialAudio 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
vulkan
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

media-gfx

freecad

Flag Description
X
addonmgr Build the addon manager module for automatic handling of 3rd party addons
assembly Build the assembly module to create 3D models composed of several distinguishable parts as a conformed machine.
bim Build the BIM module and workbench
cam Build the CAM module and workbench
cloud Build the Cloud workbench, to access cloud providers (mostly Amazon S3).
fem Build the FEM module and workbench which provides Finite Element Analysis (FEA) workflows
idf Build the IDF module to provide file exchange capabilities with IDF files
inspection Build the inspection workbench which gives you specific tools for examination of shapes (experimental)
mesh Build the mesh module and workbench
netgen Build support for the netgen mesher through <pkg>media-gfx/netgen</pkg>.
openscad Build the OpenSCAD module for interoperability with OpenSCAD and repairing Constructive Solid Geometry (CSG) history
pcl Use external <pkg>sci-libs/pcl</pkg> for point clouds support.
points Build the points module and workbench for working with point clouds
reverse Build the reverse engineering module and workbench
robot Build the robot module and workbench for studying robot movements
smesh Build Salome SMESH
spacenav Add support for space navigator devices through <pkg>dev-libs/libspnav</pkg>
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

ufraw

Flag Description
contrast enable contrast setting option
fits Enable support for the FITS image format through <pkg>sci-libs/cfitsio</pkg>
gimp
gnome
gtk
timezone enable DST correction for file timestamps

net-analyzer

suricata

Flag Description
af-packet Enable AF_PACKET support
af-xdp
bpf Enable support for eBPF (as well as XDP if supported by the kernel and the NIC driver) for low-level, high-speed packet processing
control-socket Enable unix socket
cuda Enable NVIDIA Cuda computations support
detection Enable detection modules
geoip
hardened
hyperscan Enable high-performance regex matching with Hyperscan
lua
ndpi Enable deep packet inspection via <pkg>net-libs/nDPI</pkg>
nflog Enable libnetfilter_log support
nfqueue Enable NFQUEUE support for inline IDP
pfring Enable PF_RING support via <pkg>net-libs/libpfring</pkg>
redis Enable Redis support

yaf

Flag Description
applabel enable the packet payload application label engine
entropy enable the packet payload entropy calculation
mpls enable MPLS label hashing and export
nonip enable non-IP data decode and flow export
p0f enable the OS finger printing capability by <pkg>net-analyzer/p0f</pkg>

net-mail

libpst

Flag Description
dii Add support for Summation DDI load files

sci-biology

unafold

Flag Description
postscript

sys-apps

ugrep

Flag Description
7z Enable 7z compression support
boost Use the Regex library from boost (USE=pcre is better)
brotli
bzip2
bzip3 Enable bzip3 compression support
cpu_flags_arm_neon
cpu_flags_x86_avx2
lzma
mmap
zstd

sys-block

partclone

Flag Description
btrfs Support btrfs
exfat Support exfat
fat Support fat
hfs Support hfs
minix Support minix
ntfs Support ntfs
vmfs Support vmfs
xfs Support xfs