Global USE flags

Flag	Description	Packages
cpu_flags_x86_avx2		2
debug	Raises log-level to DEBUG and enables extra runtime assertions	4
doc	Compiles and installs the Doxygen API reference and Sphinx manual	3
openssl	Build the legacy libcaf_openssl TLS module for the libcaf_io networking backend (OpenSSL is always required for libcaf_net regardless)	2
static-libs	Build static libraries	5
systemd	Install systemd service unit	4
test	Builds the provided unit tests	7

Category USE flags

net-analyzer

Flag	Description	Packages
redis	Install the Redis server for use as cache and queue backend	2

Local USE flags

app-backup

backuppc

Flag	Description
rrdtool	Enable graphs of the pool usage
rss	Enable RSS feeds for backup status
samba	Enable Samba/SMB support for backing up Windows hosts

dev-libs

caf

Flag	Description
examples	Compiles and installs the provided example binaries and sources

dev-python

mitogen

Flag	Description
ansible	Install symlinks for Ansible strategy plugins

net-analyzer

librenms

Flag	Description
amqp	Enable support for AMQP alert transport
ipmi	Enable IPMI monitoring support
ldap	Enable LDAP authentication support
radius	Enable RADIUS authentication support

nfdump

Flag	Description
ftconv	Build the ft2nfdump flow-tools to nfdump converter
jnat	Build nfdump with support for JunOS NAT event logging
nfpcapd	Build nfpcapd collector to create netflow data from precollected pcap traffic
nfprofile	Build nfprofile used by NfSen
readpcap	Build nfcapd collector to read from pcap file instead of network data

zeek

Flag	Description
btest	Install btest testing framework and test suites
cron	Install a ZeekControl maintenance cron job
curl	Enable curl support for HTTP transfers in scripts
geoip2	Enable support for Maxmind's GeoIP library
ipsumdump	Enable ipsumdump support for trace-summary
jemalloc	Use jemalloc allocator for improved memory performance
kerberos	Enable Kerberos protocol analysis
nodejs	Enable Node.js support
python	Build the Broker Python bindings (also required by the zeekctl, zeek-client and zkg tools)
sendmail	Enable Zeek and ZeekControl to send mail
spicy	Enable the bundled Spicy protocol analyzer framework
tcmalloc	Use the tcmalloc allocator from dev-util/google-perftools
tools	Install auxiliary command-line tools (zeek-cut, zeek-archiver, trace-summary, ...)
zeek-client	Install zeek-client CLI management tool
zeekctl	Enable ZeekControl for operating Zeek installations
zeromq	Enable ZeroMQ cluster backend
zkg	Install the Zeek package manager

net-firewall

pkt_netflow

Flag	Description
snmp	Enable SNMP agent for exporting flow statistics via net-snmp

net-misc

smcroute

Flag	Description
caps	Use POSIX capabilities via libcap to drop root privileges
mrdisc	Enable multicast router discovery, described in RFC4286.

net-nds

389-ds-base

Flag	Description
accountpolicy	Enable account policy plugin - automatically lock an account after a certain amount of time has elapsed
auto-dn-suffix	Enable auto bind with auto dn suffix over unix domain socket (LDAPI) support
autobind	Enable auto bind over unix domain socket (LDAPI) support
bitwise	Enable bitwise plugin - supported data in raw/bitwise format
dna	Enable dna (distributed numeric assignment) plugin - to automatically assign unique uid numbers to new user entries as they are created
ldapi	Enable LDAP over unix domain socket (LDAPI) support
pam-passthru	Enable pam-passthru plugin - for simple and fast system services used in ldap
selinux

sci-misc

llama-cpp

Flag	Description
blis	Build a BLIS BLAS backend
cpu_flags_x86_avx
cpu_flags_x86_f16c
cpu_flags_x86_fma3
cpu_flags_x86_sse4_2
cuda
flexiblas	Build a FlexiBLAS BLAS backend
openblas	Build an OpenBLAS BLAS backend
opencl	Build an OpenCL backend (Adreno and Intel GPUs only)
openmp
rocm	Build a HIP (ROCm) backend for AMD GPUs
rpc	Enable the RPC backend and rpc-server tool for distributed inference (unauthenticated; do not expose to untrusted networks)
vulkan
wmma	Use rocWMMA to accelerate Flash Attention on supported AMD GPUs

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