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#
# KNOBS -- A list of popular knobs and their descriptions
#
# $FreeBSD$
#
# Rules for adding knobs:
#
#  - Knob name must be 12 characters or less
#  - Knob description must be 45 characters or less
#
#  - Naming knobs:
#      When a port has a lib-prefix (e.g.: libquicktime, libxine)
#      the lib-prefix should be stripped from the knob name
#     (e.g.: QUICKTIME, XINE).
#
# Keep this list sorted in alphabetical order.
#
# Knob name:		Knob description:
#  Length  |		|                   Length                   |

A52			ATSC A/52 audio decoding (used in most DVDs)
AALIB			Adds aalib support
ADS			Adds Asyncronous DNS Support
ALSA			Adds ALSA support
APACHE			Include support for APACHE_PORT
ARTS			aRts support via the KDE sound daemon
ASPELL			Use Aspell (textproc/aspell) for spell checking
ATLAS			Use ATLAS instead of BLAS/LAPACK
AUDIOFILE		Adds audiofile support
AVAHI			Adds Avahi support
AVIFILE			Adds support for AVI multimedia
BDB			Adds Berkeley DB Support
BLAS			Use BLAS instead of ATLAS
CACA			Libcaca colored ASCII graphics
CAIRO			Adds CAIRO support
CDDB			CDDB support
CDPARANOIA		Support for cdparanoia CD extraction
CGI			Adds CGI support
CJK			Chinese, Japanese, and Korean language support
CLAMAV			Adds clamav support
CLIENT			Client component of a client/server package
CLIENT_ONLY		Client component of a client/server package
COMPILE			Do not use the pre-compiled .jar files
CUPS			CUPS (Common Unix Printing System) support
CURL			cURL generic file transfer library support
DBUS			Adds support for D-Bus (Desktop Bus)
DEBUG			Enables debugging support
DEDICATED		Enables dedicated server
DOCS			Install documentation
DOXYGEN			Build Doxygen documentation
DTS			DTS coherent acoustics decoding (some DVDs)
DV			Digital Video used by many digital camcorders
DVD			Enables general DVD support
DVDNAV			Enables DVD Menu support
DVDREAD			Enables DVD support
EJABBERD		Adds support for the ejabberd jabber server
EMACS			Adds support for Emacs
ESOUND			Adds support for EsounD
EXAMPLES		Installs optional example code, graphics, etc.
EXIF			Support EXIF headers in JPEG and TIFF files
FAAC			FAAC AAC and MP4 audio encoder support
FAAD			FAAD AAC and MP4 audio decoder support
FAM			Adds File Alteration Monitor support
FASTCGI			Adds FastCGI support
FFMPEG			Enables FFMPEG support
FIREBIRD		Firebird (Interbase) database support
FPING			Adds fping support
FREETYPE		Adds Freetype support
FRIBIDI			Adds fribidi support
FLAC			Flac audio support
FORTRAN			Adds FORTRAN support
GCONF			Use GConf/GConf2
GD			Adds support for gd
GDBM			Use gdbm db instead of system bdb
GEOIP			Adds GeoIP support
GETTEXT			Adds GetText support
GHC			Prefer/use Glasgow Haskell Compiler
GHOSTSCRIPT		Adds ghostscript support
GIF			Adds GIF support
GL			Adds OpenGL support
GLX			Adds OpenGL support
GMP			Adds GMP support
GNOME			Adds GNOME support
GNUTLS			Adds GnuTLS support
GPGME			Use security/gpgme for PGP support
GRAPHVIZ		Adds graphviz support
GSASL			Adds GSASL support
GSM			GSM audio codec support
GSSAPI			GSSAPI (Kerberos) support
GSTREAMER		GStreamer multimedia support
GTK			Adds Gtk support
GTK1			Adds Gtk+1 support
GTK2			Adds Gtk+2 support
GTKSPELL		Enable Spell checking through GTKSpell
GUI			Enable Graphical User Interface
H323			Adds support for the H323 protocol
HAL			Adds support for HAL
HEIMDAL_KRB5		Adds Heimdal kerberos support
ICU			Use ICU for unicode collation
IDN			Adds support for International Domain Names
IMAGEMAGICK		ImageMagick graphics support
IMAP			Adds support for IMAP mail protocol
IMLIB			Adds imlib support
IODBC			Use iODBC as the ODBC driver
IPV6			IPv6 internet protocol support
IRC			Adds IRC support
ISPELL			Use textproc/ispell for spell checking
JABBER			Adds support for the Jabber protocol
JACK			Adds suppor for the JACK Audio Connection Kit
JAVA			Adds support for Java
JOYSTICK		Adds joystick support
JPEG			Adds JPEG support
KDE			Adds KDE support
KDE4			Adds KDE4 support
KERBEROS		Adds Kerberos support
LAME			LAME MP3 audio encoder support
LADSPA			Adds LADSPA support
LDAP			Adds LDAP support
LIGHTTPD		Adds lighttpd support
LINUX			Adds support for Linux
LINUXTHREADS		Use the linuxthreads pthread library
LIRC			Adds LIRC support
LIVEMEDIA		LiveMedia rstp/rtp/sdp support
LUA			Lua scripting support
LZO			LZO data compression support
MAD			Mad MP3 audio decoder support
MANPAGES		Build and install man pages
MIT_KRB5		Adds MIT kerberos support
MATROSKA		Matroska multimedia container support
MIKMOD			Adds mikmod support
MILTER			Adds milter support
MMAP			Enables MMAP support
MMX			Adds support for x86 MMX optimizations
MODPERL2		Use www/mod_perl2 port
MODPYTHON3		Use www/mod_python3 port
MOTIF			Adds MOTIF support
MOZILLA			Adds Mozilla support
MP3			Adds MP3 support
MP4			Adds MP4 support
MPEG4IP			MPEG4 multimedia support
MPG123			Adds mpg123 support
MPI			Use MPI
MPLAYER			Adds Mplayer support
MSN			Adds support for the MSN protocol
MSSQL			Adds MSSQL Support
MUSEPACK		Musepack (MPC, musicpd, libmpcdec) support
MYSQL			MySQL database support
NAS			Adds support for NAS (Network Audio Sound)
NCURSES			Adds ncurses console graphics support
NETCDF			Adds NetCDF support
NHC98			Prefer/use nhc98 Haskell compiler
NIS			Support for NIS/YP
NLS			Native Language Support via gettext utilities
NOTIFY			Adds support for libnotify
NOUVEAU			Use MesaLib 7.4.4/libdrm 2.4.12 with xf86-video-nouveau
NTLM			Adds NTLM support
NVIDIA			Adds support for the nvidia driver
NVIDIA_GL		Use libGL provided by NVidia binary drivers
ODBC			Adds ODBC support
OGG			OGG multimedia container format
OPENAL			Adds OpenAL support
OPENGL			Adds OpenGL support
OPENLDAP		Adds OpenLDAP support
OPENMPI			Adds OpenMPI support
OPENSSL			Adds OpenSSL support
OPTIMIZATION		Build with optimizations
OPTIMIZED_CFLAGS	Enables optimized CFLAGS
OPTIMIZED_FLAGS		Enables optimized compiler flags
ORACLE			Adds Oracle database support
OSS			Adds support for the Open Sound System
PAM			Adds PAM support
PCRE			Adds PCRE support
PDF			Adds PDF support
PERL			Adds Perl language/module support
PGO			Enables Profile-Guided Optimization
PGSQL			PostgreSQL database support
PHP			Adds PHP support
PLUGIN			Enables building of plugin
PLUGINS			Enables building of plugins
PNG			Adds PNG support
POP3			Adds support for POP3 mail protocol
PORTAUDIO		Adds Portaudio support
POSTFIX			Adds support for the Postfix mta
PSYCO			Adds Python Psyco optimization support
PTHREADS		Enable pthreads support
PULSEAUDIO		Adds support for the PulseAudio sound server
PYTHON			Adds Python language/module support
QT			Adds Qt support
QT4			Adds Qt4 support
QUOTA			Adds support for quotas
QUICKTIME		QuickTime audio/video support
RADIUS			Adds RADIUS support
READLINE		Adds Readline support
REPLACE_BASE		Replace base software with this version
RUBY			Adds Ruby language/module support
SAMBA			Adds SAMBA support
SAMPLERATE		Adds support for libsamplerate
SASL			Adds SASL support
SASL2			Adds SASL2 support
SASLKRB5		Adds SASL Kerberos5 support
SDL			Adds support for SDL media library
SERVER			Server component of a client/server package
SIEVE			Adds Sieve support
SIGCHASE		Adds DNSSEC validation support
SIMD			Enable x86 SIMD (3DNow!/MMX)
SLANG			Adds display/screen management via S-Lang
SLP			Adds SLP (Service Locator Protocol) support
SMP			Adds Symetric MultiProcessor support
SNDFILE			Adds support for libsndfile
SNMP			Adds SNMP support
SOCKS			Adds SOCKS support
SOUND			Adds sound support
SOX			SoX audio support
SPAMASSASSIN		Adds Spamassassin support
SPEEX			Speex audio codec support
SQLITE			SQLite embedded SQL database support
SSE			Adds support for x86 SSE optimizations
SSE2			Adds support for x86 SSE2 optimizations
SSH			Adds support for SSH
SSL			Adds support for SSL (Secure Socket Layer)
STATIC			Build statically linked executables
SUBVERSION		Adds Subversion support
SUID			Install with setuid bit set
SVGALIB			Adds SVGALib support
SVG			Adds SVG support
SYSLOG			Adds Syslog support
TAGLIB			Adds Taglib support
TCL			Adds TCL support
TCP_WRAPPERS		Adds TCP-Wrappers support
TEST			Enable tests
THEORA			Theora video codec support
THREADS			Enable threads support
TIFF			Adds TIFF support
TLS			Adds TLS support
TOOLS			Install additional tools
TRACING			Enable tracing
TREMOR			Tremor (integer-only Vorbis) audio support
UNICODE			Adds unicode support
UNIXODBC		Use UnixODBC as the ODBC driver
USB			Adds devel/libusb support for USB devices
V4L			Adds Video 4 Linux support
VIDEO			Enable video support
VORBIS			OGG/Vorbis audio support
WAVPACK			Adds WAVPACK support
WX			wxWidgets (formerly wxWindows) support
X11			Support for X11
X264			H.264/AVC (MPEG4 part 10) multimedia codec
X86_ASM			Enables assembly code (i386 only)
XAW3D			Adds XAW3D support
XFT			Adds XFT support
XIM			Adds XIM support
XINE			XINE multimedia support
XINERAMA		Adds Xinerama support
XML			Adds XML support through libxml
XMMS			Adds XMMS support
XPM			Adds XPM support
XVID			XVID multimedia MPEG4 codec support
YAHOO			Adds Yahoo! Messenger Protocol support
ZIP			Adds ZIP support
ZLIB			Adds Zlib support
ZVBI			Adds support to access raw VBI capture devices