aalib			Enable aalib support.
abook			Enable abook support.
acl			Enable POSIX ACL support.
adobe-cidfonts		Select Adobe-fonts.
adplug			Enable Adlib emulator support.
ads			Enable Windows Active Directory support.
afterstep		Enable afterstep support.
agg			Enable agg support.
alsa			Enable ALSA support.
amanda-dump-snap	If dump supports -X, use it.
amanda-fqdn		Use FQDN's in Amanda.
amanda-smb		Enable SMB backup support.
amanda-ssh		Enable ssh as a transport.
amtterm-gamt		Build amtterm GUI version (gamt).
amule-alc		Build aMule LinkCreator GUI version.
amule-alcc		Build aMule LinkCreator for console.
amule-cas		Build C aMule Statistics.
amule-cmd		Build aMule command line client.
amule-daemon		Build aMule daemon version.
amule-ed2k		Build aMule ed2k links handler.
amule-gui		Build aMule remote GUI.
amule-monolithic	Build monolithic aMule app.
amule-webserver		Build aMule WebServer.
amule-wxcas		Build aMule GUI Statistics.
anope-dbencryption	Enable database encryption.
anthy			Use Anthy as Japanese conversion program.
anthy-2ch-dict		Include the 2ch dictionary.
anthy-okinawa-dict	Include the okinawa dictionary.
apache			Enable support for Apache web server.
apache-mpm-event	Use multi-threaded workers in Apache web server.
apache-mpm-prefork	Use pre-forked workers in Apache web server.
apache-mpm-worker	Use multiple processes of multi-threaded workers in Apache web server.
apache-shared-modules	Build all modules as shared for apache22.
apple-common-crypto	Use Apple's CommonCrypto.
ares			Use the ares library for asynchronous name resolution.
aria2-metalink		Enable Metalink support.
arts			Use the aRts audio daemon.
aspell			Add spell checking support using aspell.
ass			Enable subtitle renderer for the ASS/SSA format
asterisk-config		Control installation of Asterisk sample config files.
aterm-big5		Enable Chinese support.
aterm-greek		Enable Greek keyboard support.
aterm-kanji		Enable kanji support.
aterm-xterm-scroll	Use xterm-scrollbar instead of a NeXT-like one.
atheme-large-net	Enable support for large networks (i.e. > 2000 users).
audiofile		Enable audio conversion using libaudiofile.
auth-db			Use Berkley DB for the jabberd2 authorization database.
auth-ldap		Use LDAP for jabberd2 authorization.
auth-mysql		Use MySQL for the jabberd2 authorization database.
auth-pam		Use PAM for jabberd2 authorization.
auth-pgsql		Use PostgreSQL for the jabberd2 authorization database.
auth-sqlite		Use SQLite for the jabberd2 authorization database.
avahi			Enable DNS service discovery and multicast DNS support.
avahi-howl		Enable howl compatibility in avahi.
bacula-static		Enable building of statically linked versions of the Bacula daemons.
batch			Enable batch mode support.
bdb			Enable Berkeley DB support.
bind-dig-sigchase	Enable dig(1) option +sigchase for DNSSEC signature chasing.
bind-json-statistics-server	Enable building in the statistics server with JSON in bind95 and later.
bind-xml-statistics-server	Enable building in the statistics server with XML output in bind95 and later.
bittorrent		Enable bittorrent support.
blender-exppython	Enable the Experimental Python support.
boehm-gc		Use Boehm's garbage collector for memory allocation.
bozohttpd-do-htpasswd	Enable .htpasswd file processing in bozohttpd.
bugzilla-charts		Enable generation of charts.
bugzilla-imagemagick	Compress .BMPs to save space.
bugzilla-patchviewer	Enable patchviewer support.
bugzilla-xmlimportbugs	Bulk import/export of bugs in XML format.
bzip2			Enable compression using bzip2.
caca			Enable libcaca support.
cairo			Enable cairo support.
camlp4	Enable camlp4 support.
camlzip			Enable camlzip support (for zip/gz/jar).
canna			Use Canna as Japanese conversion program.
cares			Use the c-ares library for asynchronous name resolution.
catalog-mysql		Store Bacula catalog in MySQL database.
catalog-pgsql		Store Bacula catalog in PostgreSQL database.
catalog-sqlite		Store Bacula catalog in SQLite database.
catalog-sqlite3		Store Bacula catalog in SQLite 3 database.
cdb			Enable CDB support.
cdparanoia		Use cdparanoia to rip CDDA media.
cerf			Enable libcerf support.
cg			Add support for the Cg compiler.
cgi			Enable CGI support.
chasen			Use ChaSen as the Japanese Morphological Analzer.
cjk			Enable Chinese/Japanese/Korean support.
clamav			Enable ClamAV support.
clang-static-analyzer	Install the clang static analyzer.
claws-mail-jpilot	Add jpilot support.
clisp			Common/C Lisp.
clutter			Use Clutter for graphics support.
compface		Enable compface support.
coqide			Enable ide support for coq.
coreaudio		Enable Core Audio library support.
courier-dsn		Delivery Status Notification (DNS) mail delivery.
courier-esmtp		ESMTP mail delivery.
courier-gnutls		Support using GNU TLS instead of OpenSSL.
courier-local		Local mail delivery.
courier-uucp		UUCP mail delivery.
cups			Enable cups (Common UNIX Printing System) support.
curl			Enable curl support.
curses			Enable curses support.
cvs			Enable CVS support.
cvsgraph		Enable cvsgraph support.
cython			Enable Cython support.
dar-int32		Use 32-bit integers for file lengths in Dar.
dar-int64		Use 64-bit integers for file lengths in Dar.
darwin			Build and/or run on Darwin and Mac OS X.
db2			Enable db2 support.
db4			Enable db4 support.
dbh			Enable DBH support.
dblatex-fig		Enable fig support in dblatex.
dbus			Enable dbus (desktop bus) support.
debug			Enable debugging facilities in the package.
debug-info		Enable debug info in generated binaries (e.g. for crash analysis), but not full scale debugging.
deliver-suid		Install deliver executable setuid root.
disable-compile-inits	Disable compile time implicit initialization.
djbdns-cachestats	Patch to add stats for cache hits/misses.
djbdns-ignoreip2	Patch to treat certain responses as NXDOMAIN.
djbdns-qmerge1		Initial patches to address dnscache poisoning weakness.
djbdns-qmerge2		Newer patches to address dnscache poisoning weakness.
djbdns-tinydns64	Patch to fix tinydns-data on 64-bit platforms.
djbfft-pentium		Optimize for Pentium{,MMX} processors.
djbfft-ppro		Optimize for Pentium{Pro,II,III} processors.
djbfft-sparc		Optimize for UltraSPARC-{I,II} processors.
djbware-errno-hack	Patch to #include <errno.h> for correctness.
djvu			Enable DjVuLibRe support.
dkim-milter-arlib	ar(3) support for dkim-milter.
dkim-stats		dkim-stats(8) support for dkim-milter.
dnsrbl			Enable DNS Real-time Blackhole List support.
dnssd			Enable DNS Service Discovery Protocol support.
dnssec			Enable DNSSEC validation.
doc			Include the documentation.
doxygen			Include doxygen based document.
drac			Enable DRAC support.
dri			Enable Direct Rendering support.
drupal-xmlservices	Enable XML-based services.
dspam-preferences-extension	Enable preferences extension.
dspam-verbose-debug	Enable verbose debugging support.
dspam-virtualusers	Enable support for virtual users.
dtrace			Enable DTrace support.
dts			Enable DTS Coherent Acoustics support.
dv			Enable usage of the libdv library.
dvdcss			Enable CSS support for DVDs.
dvdnav			Enable libdvdnav support to navigate DVDs.
dvdread			Enable reproduction of DVDs.
dvi			Enable device independent file format (mostly TeX) support.
eaccelerator-disassembler	Include disassembler.
eaccelerator-doc-comment-inclusion	Retain doc-comments in internal php structures.
eai			Enable EAI (Email Address Internationalization) support.
eb			Enable EB dictionary library support.
ecl			Use Embeddable Common Lisp.
ecore			Enable ecore library support.
eekboard		Use eekboard for virtual keyboard support.
efence			Build with Electric Fence malloc() debugger support.
efnet			Enable tweaks to support EFNet.
elinks-exmode		Enable vi-like command entry.
elinks-fastmem		Allow direct use of system memory allocation functions.
elinks-html-highlight	Enable HTML highlighting using DOM engine.
elinks-root-exec	Allow elinks to run as root.
emacs-w3m		W3m browser extention.
embedded-server		Enable embedded server support for MySQL.
enchant			Add spell checking support using enchant.
enchant-zemberek	Add spell checking support for Turkish.
epoll			Enable support for epoll I/O event notification facility.
epub			Enable epub support.
esound			Enable support for the Enlightment Sound Daemon.
evolution-data-server	Enable support for evolution-data-server.
exim-build-eximon	Also build the X based exim queue monitoring tool.
exim-content-scan	Call virus and spam scanning direct from ACLs.
exim-lookup-dnsdb	Use DNS for lookups (as general database facility).
exim-lookup-dsearch	Lookup via key as filename in directory.
exim-lookup-ldap	LDAP lookup using a query in the form of a URL.
exim-lookup-mysql	Perform lookups in MySQL database.
exim-lookup-pgsql	Perform lookups in PostgreSQL database.
exim-lookup-sqlite	Perform lookups in SQLite database.
exim-lookup-whoson	Lookup in whoson dynamic IP address.
exim-old-demime		Use deprecated "demime" condition in the DATA ACL.
expat			Use the expat library for XML parsing.
ezmlm-althash		Patch to hash subscriber list case-insensitively.
f90			Enable Fortran 90 support.
faac			Enable AAC decoding support using faac.
faad			Enable AAC decoding support using faad2.
fam			Support using File Alteration Monitor (FAM).
farsight		Enable farsight2 support.
farstream		Enable farstream support.
fastcgi			Use FastCGI as the CGI manager.
fd-small		Build smaller misc/fd package.
ffmpeg			Enable ffmpeg support.
fftw			Use the fftw library for Discrete Fourier Transforms.
fftw-fortran		Enable Fortran support.
filter-design		Adding filter_design capability.
finger			Enable finger support.
firefox			Use firefox as gecko rendering engine.
firefox3		Use firefox3 as gecko rendering engine.
flac			Enable FLAC support.
floppyd			Use floppyd to access floppy device.
fluidsynth		Enable MIDI support using fluidsynth.
fontconfig		Enable FONTCONFIG (fonts/fontconfig) support.
freediameter-all-extensions	Build all extensions for freeDiameter (except test and debug).
freeradius-simul-use	Enable Simultaneous-Use.
freeswitch-08k		8000Hz Audio Files
freeswitch-16k		16000Hz Audio Files
freeswitch-32k		32000Hz Audio Files
freeswitch-48k		48000Hz Audio Files
freetype		Enable freetype support.
fribidi			Enable BIDI support using fribidi.
ftp			Enable File Transfer Protocol (FTP) support.
fts			Enable full-text searching.
fuse			Enable Filesystem in Userspace support.
gamin			Enable Gamin file and directory monitoring system support.
gcc-ada			Build the gcc Ada frontend and libraries.
gcc-c++			Build the gcc C++ frontend and libraries.
gcc-fortran		Build the gcc Fortran frontend and libraries.
gcc-go			Build the gcc Go frontend and libraries.
gcc-inplace-math	Build math libs inplace instead of depending on them.
gcc-java		Build the gcc Java frontend, tools and libraries.
gcc-multilib		Build libraries for multiple ABI's.
gcc-objc		Build the gcc Objective-C frontend and libraries.
gcc-objc++		Build the gcc Objective-C++ frontend and libraries.
gconf			Use GConf to store preferences.
gd			Use GD to render graphical output.
gdal			Use the GDAL library.
gdb6-tui		Build the tui application.
gdbm			Use the GNU gdbm database library.
gdk-pixbuf		Use gdk-pixbuf as imaging library.
gdk-pixbuf2		Use gdk-pixbuf2 as imaging library.
geoclue			Enable geoclue support.
geoip			Enable IP-to-country-lookup using the GeoIP C library.
ggi			Enable GGI support.
ghostscript		Enable GhostScript support.
gif			Enable GIF support.
gimp			Enable GIMP support.
gimp1-helpbrowser	Link against gnome1 to get a help browser.
git			Enable Git support.
git-gui			Build the GUI in Tcl/Tk.
glade			Enable Glade support
glfw			Enable GLFW support
gmp			Enable gmp (GNU Multiple Precision Arithmetic Library) support.
gmp-fat			Build-in all x86 assembler code, detecting CPU at run-time.
gnome			Enable GNOME support.
gnome-keyring		Enable GNOME keyring support.
gnomecanvas		Enable GNOME canvas support
gnomevfs		Enable GNOME Virtual File System support.
gnupg2			Use GNU Privacy Guard (GnuPG) Version 2.0
gnupg21			Use GNU Privacy Guard (GnuPG) Version 2.1
gnupg2-gpgsm		Install gpgsm binary.
gnuplot-pdf-doc		Install PDF document.
gnutls			Enable GNU TLS support.
goffice			Enable goffice support.
gopher			Enable support for the Gopher information system.
gpgme			Enable gpg support, by using the gpgme library.
gqmpeg-japanese		Japanese ID3 tag support.
gqmpeg-russian		Russian ID3 tag support.
graphicsmagick		Use GraphicsMagick as imaging library.
groff-docs		Install documentation images.
groonga-httpd		Enable nginx used for groonga-httpd.
groonga-suggest-learner	Enable Groonga suggest learner.
gsasl			Enable SASL support with gsasl.
gsl			Use GNU Scientific Library.
gssapi			Enable gssapi (Kerberos V) support.
gstreamer		Enable gstreamer support.
gstreamer-gstcheck	Enable gstcheck support in gstreamer.
gtk			Enable support for GTK.
gtk2			Enable support for GTK2.
gtk3			Enable support for GTK3.
gtk3-atk-bridge		Enable ATK support.
gtksourceview		Enable gtksourceview support.
gtksourceview2		Enable gtksourceview2 support.
gtkspell		Enable gtkspell support.
gtkwave-tcl		Enable tcl for gtkwave.
guile			Enable support for GUILE.
gzip			Enable compression using gzip.
hal			Support for the freedesktop.org Hardware Abstraction Layer.
halfops			Halfops are similar to plain ops, but can't kick/deop plain ops.
hawknl			Enable HawkNL network API support.
hping-suid		Install hping executable setuid root.
hpn-patch		High Performance Enabled SSH/SCP for OpenSSH.
http2			Add support for HTTP/2.
hunspell		Add spell checking support using hunspell.
i586-optimized		Optimize for i586 (only).
ibus			Enable Intelligent Input Bus support.
icu			Enable icu support.
id3			Enable id3 tagging support.
idea			Enable support for the IDEA cryptographic algorithm (possible license+patent problems).
idn			Internationalized Domain Names (IDN) support.
ikiwiki-amazon-s3	Enable publishing rendered pages to Amazon S3 servers.
ikiwiki-highlight	Enable syntax highlighting in code blocks.
ikiwiki-search		Enable full-text search using xapian.
ilbc			Enable the use of iLBC (Internet Low Bit Rate Codec).
imagemagick		Use ImageMagick as imaging library.
imap			Enable imap support.
imapuw-cleartextpwd	Allow cleartext passwords over non-encrypted connections.
imapuw-whoson		Enable whoson support.
imlib			Use imlib as imaging library.
imlib2			Use imlib2 as imaging library.
imlib2-amd64		Enable amd64 speedups.
inet6			Enable support for IPv6.
inotify			Enable libinotify support.
inspircd-remoteinet6	Enable remote includes over IPv6.
inspircd-sqlauth	Enable connections to be tied into a database table.
inspircd-sqllog		Enable logging of network-wide data for your network into a database.
inspircd-sqloper	Enable storage of oper credentials in an SQL table.
inspircd-sqlutils	Enable developer utilities which allow certain other SQL modules to be implemented easily.
inspircd-ziplinks	Compress data before transmitting it between servers.
introspection		Enable GObject Introspection support.
iodbc			Enable ODBC support via iODBC.
ipa			Select IPA fonts.
ipa-memfunc-debug	Enable ipa_memfunc debugging.
ipa-without-autorules	Disable dynamic rules support.
ipa-without-limits	Disable limits support.
ipa-without-rules	Disable static rules support.
ipa-without-sublimits	Disable sublimits support.
ipa-without-thresholds	Disable thresholds support.
irssi-perl		Enable Perl support in irssi.
iso			Build a .iso file.
ispell			Add spell checking support using ispell.
jabber			Enable support for jabber/gtalk.
jack			Enable support for the JACK audio server.
jasper			Enable JPEG 2000 support using the jasper library.
java			Enable Java support.
javascript		Enable Javascript support.
jdbc-mysql31		Enable MySQL JDBC driver.
jdbc-mysql5		Enable MySQL JDBC driver.
jpeg			Enable JPEG support.
json			Enable JSON (JavaScript Object Notation) support.
jwhois-enable-cache	Enable cache support.
kde			Enable KDE support.
kde3			Enable support for KDE 3.
kde4			Enable support for KDE 4.
kerberos		Enable Kerberos support.
kerberos-prefix-cmds	Enables addition of a prefix to the kerberos client commands.
kerberos4		Enable Kerberos4 support.
kermit-suid-uucp	Install kermit setuid uucp.
klash			Install Konqueror flash plugin.
kqueue			Enable support for kernel event notification mechanism.
l10n			Enable language localization.
lablgtk			Use lablgtk.
lablgtk1		Use lablgtk1 (GTK1).
ladspa			Enable Linux Audio Developers Simple Plugin API support.
lame			Use the lame encoder to create MP3 files.
lang-af			Add Afrikaans language support.
lang-ar			Add Arabic language support.
lang-be			Add Belarusian language support.
lang-bg			Add Bulgarian language support.
lang-br			Add Breton language support.
lang-bs			Add Bosnian language support.
lang-ca			Add Catalan language support.
lang-cs			Add Czech language support.
lang-cy			Add Welsh language support.
lang-da			Add Danish language support.
lang-de			Add German language support.
lang-el			Add Greek language support.
lang-en			Add English language support.
lang-en-gb		Add British English language support.
lang-eo			Add Esperanto language support.
lang-es			Add Spanish language support.
lang-et			Add Estonian language support.
lang-fa			Add Persian language support.
lang-fi			Add Finnish language support.
lang-fo			Add Faroese language support.
lang-fr			Add French language support.
lang-ga			Add Irish language support.
lang-gl			Add Galician language support.
lang-gn			Add Guarani language support.
lang-gu			Add Gujarati language support.
lang-he			Add Hebrew language support.
lang-hi			Add Hindi language support.
lang-hr			Add Croatian language support.
lang-hu			Add Hungarian language support.
lang-id			Add Indonesian language support.
lang-is			Add Icelandic language support.
lang-it			Add Italian language support.
lang-ja			Add Japanese language support.
lang-ko			Add Korean language support.
lang-ku			Add Kurdish language support.
lang-lt			Add Lithuanian language support.
lang-lv			Add Latvian language support.
lang-mr			Add Marathi language support.
lang-ms			Add Malay language support.
lang-nb			Add Norwegian Bokmal (book language) language support.
lang-nl			Add Dutch language support.
lang-no			Add Norwegian language support.
lang-pl			Add Polish language support.
lang-pt			Add Portuguese language support.
lang-pt-br		Add Brazilian Portuguese language support.
lang-rm			Add Rhaeto-Romance language support.
lang-ro			Add Romanian language support.
lang-ru			Add Russian language support.
lang-sk			Add Slovak language support.
lang-sl			Add Slovenian language support.
lang-sq			Add Albanian language support.
lang-sr			Add Serbian language support.
lang-sv			Add Swedish language support.
lang-te			Add Telugu language support.
lang-th			Add Thai language support.
lang-tl			Add Tagalog language support.
lang-tr			Add Turkish language support.
lang-uk			Add Ukrainian language support.
lang-uk-ua		Add Ukrainian/UKRAINE language support.
lang-zh			Add Chinese language support.
lang-zh-cn		Add Chinese Simplified language support.
lang-zh-tw		Add Chinese Traditional language support.
latex			Depend on latex for build-time or run-time documentation.
lcms			Enable Light Color Management System support.
ldap			Enable LDAP support.
lensfun			Enable lensfun (camera lens distortion rectifyer) support.
libao			Enable the platform-independent 'ao' audio library.
libchamplain		Enable libchamplain support (map widget).
libdrm			Enable libdrm support.
libgcrypt		Use GNU cryptographic library.
libgme			Enable Game_Music_Emu video game music file library support.
libgpod			Enable libgpod support.
libiconv-cp932		Add supplemental support for CP932.
libidn			Add support for libidn text conversion.
libind			Add Indian script support using libind.
liblqr			Enable liblqr (liquid rescale) support.
libmms			Enable streaming from mms:// URLS using libmms.
libmp4v2		Enable MP4 support using libmp4v2.
libmpdclient		Enable MPD client support.
libmpg123		Enable mpg123 project's core decoder library support.
libmtp			Enable MTP via libmtp support.
libnotify		Enable libnotify support.
libofa			Enable Open Fingerprint Architecture library support.
libofx			Enable OFX support.
libsmi			Use libsmi for SMI MIB support.
libsoup			Use libsoup for SOUP support.
libspiff		Use libspiff for XML shareable playlist support.
libssh2			Use libssh2 for SSHv2 protocol support.
libthai			Use libthai for Thai word segmentation.
libusb			Enable USB access.
libusb-1		Enable USB access via libusb-1.
libvisual		Enable libvisual (audio visualisation) support.
libvpx			Enable libvpx support.
libwildmidi		Enable MIDI support using libwildmidi.
libwww-aliases		Install aliases for p5-libwww (e.g. HEAD, GET etc.).
libxml2			Use the libxml2 library for XML support.
lilypond		Enable LilyPond music typesetter support.
links			Use and enable support for the links browser.
lirc			Enable LIRC receiving and sending IR signals support.
live			Enable live555 support.
llvm			Enable run time generation with Low Level Virtual Machine.
lmdb			Enable lmdb support.
lprng-priv-ports	Connections must be made from privileged ports.
lprng-suid		Install LPRng executables setuid root.
lsof-less-secure-sockets	If 'lsof-more-secure' is set, allow all sockets to be viewed at all times.
lsof-more-secure	Only allow root to view all open files with lsof.
lua			Enable Lua support.
luit			Enable luit support.
lynx			Use and enable support for the lynx browser.
lz4			Enable LZ4 (de)compression support.
lzma			Enable LZMA (de)compression support.
lzo			Enable LZO (de)compression support.
lzw			Enable LZW (De)compression support.
m17nlib			Enable the m17n library support.
m68060-optimized	Optimize for m68060 (only).
mac			Enable Monkey's Audio Codec support.
mad			Enable usage of the mad library to play MP3 files.
maintainer-zts		Enable the Zend Thread Safety option for PHP.
manual			Include manual.			
marble			Enable marble (virtual globe) support.
mc-charset		Enable charset selection and conversion.
mecab			Use MeCab as the Japanese Morphological Analzer.
memcached		Enable memcached support.
mex			Enable matlab mex support (Linux and Solaris only).
migemo			Enable migemo (Japanese text search tool/library) support.
mikmod			Enable MikMod sound library.
mio-epoll		Use epoll to watch for incoming messages/connections.
mio-kqueue		Use kqueue to watch for incoming messages/connections.
mio-poll		Use poll to watch for incoming messages/connections.
mio-select		Use select to watch for incoming messages/connections.
mitshm			Enable MIT-SHM X extension support.
mlib			Enable usage of medialib (SunOS only).
mlterm-fb		Enable framebuffer support.
mmx			Enable MMX support (i386 only).
mng			Enable mng (Multiple-image Network Graphics) support.
modperl			Use modperl to improve speed of Perl scripts in Apache.
modperl1		Use modperl 1.x as the CGI manager (with Apache 1.x).
modperl2		Use modperl 2.x as the CGI manager (with Apache 2.x).
modplug			Use for decoding mod-like music formats.
motif			Enable motif support.
motoya			Add motoya fonts.
mozilla			Use mozilla as gecko rendering engine.
mozilla-jemalloc	Enable building with Mozilla'a jemalloc.
mozilla-jit		Enable nanojit javascript acceleration.
mozilla-lightning	Enable the lightning calendar extension.
mozilla-single-profile	Enable single profiles on mozilla browsers.
mp3tunes		Enable support for mp3tunes.com.
mp4v2			Enable MP4 support using mp4v2.
mpcdec			Enable Musepack decoder library support.
mpeg3			Enable libmpeg3 MPEG decoding library support.
mpeg4ip			Enable mpeg4ip support.
mpg123			Enable MP3 support using mpg123.
mpg123-altivec		Enable altivec optimized dithering code.
mpg123-fifo		Enable FIFO support for the mpg123 control interface.
mpg123-with-fpu		Enable generic fpu code.
mpg123-x86-dither	Enable runtime selection of optimized x86 dithering (like MMX or 3Dnow).
mplayer-default-cflags	Enable default optimized CFLAGS.
mplayer-menu		Enable support for user-defined menus.
mplayer-real		Enable usage of Real codecs.
mplayer-runtime-cpudetection	Enable CPU detection at run time.
mplayer-ssse3		Enable SSSE3 support.
mplayer-win32		Enable usage of Win32 DLLs (codecs).
mrtg-snmpv3		Enable SNMPv3 support.
mstats			Enable memory statistics.
mtpz			Enable MTPZ support using libgcrypt.
musepack		Enable the portable Musepack decoder library.
musicbrainz		Enable musicbrainz support.
musicpd-lastfm		Enable Last.FM support in musicpd.
musicpd-soundcloud	Enable Soundcloud support.
mutt-compressed-mbox	Enable compressed mailbox support in mutt.
mutt-hcache		Enable header caching in mutt.
mutt-sidebar		Enable the mutt mailbox sidebar patch.
mutt-smtp		Enable SMTP support in mutt.
mysql			Enable MySQL support.
mysqlmanager		Build mysqlmanager.
mysqlnd			Support for MySQL Native Driver (mainly for php).
nagios-nrpe-args	Enable argument passing via NRPE (possible security issues).
nas			Enable usage of the Network Audio System.
nautilus		Enable nautilus sub-menu option.
ncurses			Enable ncurses support.
ncursesw		Enable wide character ncurses support.
ndb-cluster		Build NDB Cluster support.
ndbm			Use New Database Manager (ndbm).
ndiff			Enable tool to compare Nmap scans.
ndmp			Enable support for NDMP (direct NAS backups).
nextstep		Enable Cocoa or GNUstep support.
nfdump-ftconv		Build the flow-tools to nfdump converter.
nfdump-nfprofile	Build the netflow profiler.
nfdump-sflow		Build sflow collector sfcpad.
nghttp2-asio		Build the nghttp2 ASIO C++ library.
nghttp2-tools		Build the supplied nghttp2 apps and tools.
ninja-build		Enable build by ninja-build.
nls			Use native language support.
nntp			Enable Network News Transport Protocol (NNTP) support.
nntpcache-pgp		Enable pgp signed nocem support.
notmuch-emacs		Install emacs support files for notmuch.
nspluginwrapper		Enable running non native netscape compatible plugins.
nss			Enable Network Security Services (NSS) support.
ocaml-tyxml		Enable OCaml-tyxml support
ocamlgraph		Enable Ocamlgraph support.
octave			Enable Octave support.
odbc			Enable ODBC support.
official-mozilla-branding	Use official Mozilla reg. trademarks and logos.
ogg			Enable Ogg support.
oggz			Enable Oggz support.
oniguruma		Support regular expressions via the oniguruma library.
online-tests		Requiring Internet connectivity for "make test".
onscripter-pda		Enable PDA_AUTOSIZE option to fit window size to screen
openal			Enable OpenAL support.
opencore-amr		Enable OpenCORE Adaptive Multi-Rate speech codecs.
opendkim-filter		Build opendkim-filter support.
openexr			Use OpenEXR as imaging library.
opengl			Use OpenGL as display library.
opengrok-build		Enable building of OpenGrok from source.
openldap		Enable OpenLDAP support.
openmpi-vampirtrace	Build VampirTrace as part of OpenMPI.
openssl			Enable OpenSSL support.
opus			Enable opus support.
oracle			Enable Oracle support.
oss			Enable support for the Open Sound System audio library.
osx-addressbook		Enable support for the Mac OS X Address Book.
otr			Enable Off-the-record encrypted messaging.
p0f			Enable support for passive OS fingerprinting.
pam			Enable PAM support.
pcb-motif		Use Motif for the gui instead of GTK for cad/pcb.
pcre			Enable Perl-compatible regular expressions.
pcsc			Enable PC/SC support.
pdf			Enable PDF support.
perl			Enable Perl support.
pgadmin-db-designer	Enable pgAdmin database-designer functionality.
pgsql			Enable PostgreSQL support.
pim			Enable pim (personal information management) support.
pinepwd			Enable $HOME/.pinepwd stored IMAP password file.
pinfo-native-curses	Use NetBSD native curses rather than ncurses.
pkcs11			Use certificate-on-a-stick (or card) support.
plotutils		Enable plotutils support.
png			Enable PNG support.
poppler			Enable poppler-utils support.
portals			Enable BSD Portals support
portaudio		Enable PortAudio audio library support.
postfix-milter		Build the milter with support for the Postfix MTA.
postfix-stress		Enable Postfix stress-adaptive behaviour.
postgrey-targrey	Enable the Postgrey taRgrey tarpitting patch.
ppx	Enable PPX support.
prime			Use Prime for Kana-to-Kanji conversion.
proftpd-readme		Enable mod_readme.
psiconv			Enable psiconv support (for PSION 5 file formats).
pstack			Enable pstack backtrace library.
psycopg1		Enable psycopg 1.1.x support.
psycopg2		Enable psycopg 2.x support.
pulseaudio		Enable support for the PulseAudio sound server.
py-numpy		Enable support for NumPy.
pyrex			Enable Pyrex language support.
python			Enable Python support.
qdbm			Enable qdbm support.
qemu			Use qemu.
qemu-0			Use qemu-0.x.
qmail-badrcptto		Patch to SMTP-reject particular envelope recipients.
qmail-bigdns		Patch to handle oversized responses to MX queries.
qmail-netqmail		Patch collection prepared by respected list members.
qmail-outgoingip	Patch to force a particular source IP address.
qmail-qregex		Patch to SMTP-reject customizable patterns.
qmail-realrcptto	Patch to SMTP-reject nonexistent recipients.
qmail-viruscan		Patch to SMTP-reject certain types of MIME attachments.
qpopper-servermode	Enable server mode.
qt			Enable support for QT.
qt3			Enable support for QT3.
qt4			Enable support for QT4.
qt5			Enable support for QT5.
quartz			Enable Quartz support on Mac OS X.
quickml-analog		Enable quickml log analizer.
quickml-limit		Enable quickml creators and members limitation.
readline		Enable use of GNU readline library.
regexp			Enable POSIX.2 regexp support.
rpi			Enable Raspberry Pi support.
rrl			Enable Response Rate Limiting.
rsaref			Use RSAREF library.
rsound			Enable support for the RSound PCM audio library.
rtmp			Enable rtmp:// support using rtmpdump.
rtree			Enable R-tree support.
ruby			Enable Ruby support.
ruby-build-ri-db	Build and install database for Ruby's ri utility.
samba			Enable Samba file and print services support.
samplerate		Enable libsamplerate support.
sane			Enable support for SANE scanners.
sane-backends-hp3900	Include HP3900 driver.
sasl			Enable SASL support.
sasl-cyrus		Use Cyrus SASL for the SASL layer.
sasl-gnu		Use GNU SASL for the SASL layer
saslauthd		Use the Cyrus saslauthd daemon for authentication.
sbcl			Use Steel-Bank Common Lisp.
scapy-crypto		Add in crypto support.
scapy-pyx		Add in py-X support.
scim			Enable Smart Common Input Method support.
sdl			Use SDL as display library.
sdl2			Use SDL2 as display library.
seamonkey		Use seamonkey as gecko rendering engine.
secret			Enable libsecret support.
sendmail-ffr-tls	Enable various FFR_TLS_* options.  FFR = For Future Release.
sendmail-milter		Build the milter with support for the Sendmail MTA.
sendmail-socketmap	Enable Sendmail SOCKETMAP support.
serf			Use serf HTTP/WebDAV client library.
serialconsole		Enable use of serial console.
shout			Enable SHOUTcast support.
sidplay			Enable support for the SID audio file format.
sieve			Enable sieve support.
sigver			Enable signature verification for debugging purposes.
simd			Enable MMX/3DNOW/SSE/Altivec support.
sit			Enable source identity token support.
sj3			Use SJ3 for Kana-to-Kanji conversion.
skey			Enable S/Key support.
skk			Use SKK for Kana-to-Kanji conversion.
skkdic-expr2		Enable fast skkdic-expr tool.
slang			Enable S-Lang support.
slp			Enable Service Location Protocol support.
small-net		Tune for a smaller networks.
smime			Enable S/MIME support.
smokeping-speedycgi	Enable SpeedyCGI.
snappy			Enable Snappy support.
sndfile			Enable sndfile support.
snmp			Enable SNMP support.
snort-flexresp		Flexible responses on hostile connection attempts.
snort-flexresp2		Newer flexible responses on hostile connection attempts.
snort-prelude		Enable support for the Prelude Hybrid IDS system.
socks4			Enable Socks4 support.
socks5			Enable Socks5 support.
softhsm			Enable SoftHSM for key management.
spamassassin		Enable SpamAssassin support.
spamassassin-perl-warnings	Enable Perl warnings at run-time.
spamassassin-taint-checks	Enable Perl taint checks to improve security.
spamassassin-test-awl-sql	Enable tests of the SQL module for the automatic whitelist.
spamassassin-test-bayes-sql	Enable tests of the SQL module for Bayes data.
spamassassin-test-prefork	Enable spamd prefork test (kills processes containing "spam child").
spandsp			Enable spandsp support.
speex			Enable speex support.
spf			Enable Sender Policy Framework support.
sphinx			Enable Sphinx full-text search.
sqlite			Enable SQLite support.
sqlite3			Enable SQLite3 support.
squid-arp-acl		Enable use of ARP ACL lists (ether address).
squid-backend-aufs	Enable use of with Posix AIO.
squid-backend-coss	Enable use of COSS I/O with Posix AIO.
squid-backend-diskd	Enable use of diskd process to write to cache.
squid-backend-null	Enable use of null backend; using only memory.
squid-backend-rock	Enable use of rock backend; database-style storage.
squid-backend-ufs	Enable use of UFS (Unix File System).
squid-carp		Enable use of CARP (Cache Array Routing Protocol).
squid-ipf		Enable use of transparent proxy with IP Filter.
squid-ipfw		Enable use of transparent proxy with IPFW.
squid-kerberos-helper	Enable use of Kerberos helper support.
squid-ldap-helper	Enable use of LDAP helper support.
squid-netfilter		Enable use of transparent proxy with Linux Net Filter.
squid-pam-helper	Enable use of PAM helper support.
squid-pf		Enable use of transparent proxy with Packet Filter.
squid-unlinkd		Enable use of unlinkd.
sshguard-aix		Select AIX firewall backend for SSHGuard.
sshguard-hosts		Select host firewall backend for SSHGuard.
sshguard-ipfilter	Select IPFilter firewall backend for SSHGuard.
sshguard-ipfw		Select ipfw firewall backend for SSHGuard.
sshguard-iptables	Select iptables firewall backend for SSHGuard.
sshguard-null		Select null firewall backend for SSHGuard.
sshguard-pf		Select PF firewall backend for SSHGuard.
ssl			Enable SSL support.
starttls		Enable TLS support.
static			Allows you to build static libraries.
storage-db		Use Berkley DB for the jabberd2 message store.
storage-mysql		Use MySQL for the jabberd2 message store.
storage-pgsql		Use PostgreSQL for the jabberd2 message store.
storage-sqlite		Use SQLite for the jabberd2 message store.
streamtuner-local	Enable local metadata support.
streamtuner-xiph	Enable the Xiph plugin.
suexec			Enable suEXEC support in Apache web server.
suhosin			Enable suhosin security enhancements for PHP.
sun-jre-jce		Use unlimited strength cryptography extension.
svg			Enable SVG support.
svn			Enable subversion support.
sybase			Enable Sybase/MS SQL Server support.
syncdir			Force synchronous link() and related syscalls.
syslog			Enable syslog support.
syslogng-spoof		Spoof the original source address of forwarded packets.
sysroot			Allow pkg to accept sysroot option, which changes system root.
szip			Enable szip compression.
tacacs-shrubbery-acls-support	Enable ACL support.
tacacs-shrubbery-drop-root-privileges	Drop root privileges, and run as a non-root user.
tap			Enable Tom's Audio Processing plugins library support.
tcl			Enable Tcl scripting support.
tcpwrappers		Enable tcpwrappers support.
terminfo		Use terminfo.
tests			Build and install tests.
theora			Use the theora codecs.
threads			Enable threads support.
timidity		Enable MIDI support using timidity.
tin-use-inn-spool	Use the INN spool directories.
tls			Enable TLS support.
tokyocabinet		Enable Tokyo Cabinet support.
tremor			Enable Tremor fixed point audio decoding library support.
trn-inn			Use INN as NNTP client.
trn-nntpclnt		Use nntpclnt as NNTP client.
tuning			Specify server tuning for large.
twolame			Enable MP2 support using twolame.
ucspi-ssl-perl		Enable Perl support in ucspi-ssl.
ucspi-tcp-nodefaultrbl	Remove the (nonexistent) default RBL from rblsmtpd.
udev			Enable support for the udev device manager.
uds			Enable support for Unix domain sockets.
uim			Enable UIM support.
uim-fep			Enable UIM FEP support.
umefont			Add Umefont.
unicode			Enable support for Unicode.
unixodbc		Enable ODBC support via unixODBC.
unrealircd-chroot	Enable support for running in a chroot jail.
unrealircd-disableusermod	Disable /sethost, /setident, /chgname, /chghost, and /chgident.
unrealircd-no-operoverride	Disable operator override.
unrealircd-nospoof	Enable anti-spoof protection for older TCP/IP stacks.
unrealircd-operoverride-verify	Require opers to /invite themselves into a +s or +p channel.
unrealircd-prefixaq	Enable prefixes for chanadmin and chanowner.
unrealircd-remoteinc	Enable remote includes.
unrealircd-showlistmodes	Show the modes a channel has set in the /list output.
unrealircd-shunnotices	Notify a user when they are no longer shunned.
unrealircd-topicisnuhost	/topic command to show the nick!user@host of the person who set the topic.
unrealircd-ziplinks	Compress data before transmitting it between servers.
upnp			Enable support for UPnP.
utf8			Enable UTF-8 (iconv) character encoding support.
uucp			Enable support for uucp.
uulib			Enable support for uulib.
v4l2			Enable V4L2 (Video4Linux2) support.
vaapi			Enable support for VAAPI.
valgrind		Enable Valgrind debugging and profiling support.
vatnumber-suds		Enable lightweight soap-based web services client (net/py-suds).
vbr			Enable Vouch By Reference support.
vdpau			Enable support for VDPAU.
vflib			Enable support for Japanese vector font library.
via-padlock		Enable support for the VIA PadLock Security Engine.
vice-ethernet		Enable Ethernet cartridge support.
vice-fullscreen		Enable full-screen support.
vice-hwscaling		Enable hardware-assisted screen scaling.
vidix			Enable VIDIX (Video Interface for *niX support).
viewvc-php		Use php to colorize .php and .inc files.
vlc-skins		Enable skins support in VLC.
vorbis			Enable Ogg Vorbis support.
w3m			Use and enable support for the w3m browser.
w3m-image-gdk-pixbuf	Use gdk-pixbuf as imaging library for W3m.
w3m-image-gtk2		Use GTK2 as imaging library for W3m.
w3m-image-imlib		Use imlib as imaging library for W3m.
w3m-image-imlib2	Use imlib2 as imaging library for W3m.
w3m-lynx-key		Enable lynx-like key bindings.
wavpack			Enable wavpack support.
webkit-jit		Enable JIT compilation.
webrtc			Enable web realtime communications API.
webvmail		Install CGI script for voicemail.
wide-curses		Enable wide curses support.
winbind			Enable name-service switch daemon support using Windows Servers.
wiredtiger		Enable WiredTiger support.
wmf			Enable WMF support.
wnn4			Use wnn for Kana-to-Kanji conversion.
wxwidgets		Enable wxWidgets support.
x11			Enable X11 support.
x264			Enable x264 support.
x265			Enable x265 support.
xapian-flint-backend	Enable "Flint" format Xapian database support.
xapian-quartz-backend	Enable "Quartz" format Xapian database support.
xatracker		Enable XA X Acceleration API support.
xaw			Enable Xaw support.
xaw3d			Enable Xaw3D support.
xblast-mini		Use a 480x392 window instead a 960x784 window in xblast.
xcb			Enable XCB (libxcb) support.
xcursor			Enable Xcursor support.
xen			Use xen.
xft2			Enable Xft support.
xim			Enable X Input Method support.
xinerama		Enable Xinerama support.
xjdic-locale		Honor LOCALE env var, instead of requiring ISO-2022-JP.
xlockmore-allow-root	Allow root to get access.
xlockmore-dpms		Use DPMS.
xml			Enable XML support.
xmlrpc			Enable XMLRPC support.
xpm			Enable X PixMap image format support.
xrandr			Enable Xrandr support.
xrender			Enable Xrender support.
xscreensaver-webcollage	Install webcollage screensaver.
xscrnsaver		Enable X11 Screen Saver support.
xterm-256color		Enable 256 color support.
xterm-88color		Enable 88 color support.
xterm-luit		Enable locale <> UTF encoding translation.
xterm-toolbar		Enable toolbar support in xterm.
xtest			Use XTEST Extension Library.
xvid			Enable usage of XVid codecs.
xvideo			Enable X-Video Motion Compensation library support.
zenmap			Enable nmap GUI frontend.
ziplinks		Compress data before transmitting it between servers.
zlib			Enable support for zlib compression.
zrtp			Enable ZRTP support.
zsh-multibyte		Enable multibyte support in Zsh.
zziplib			Enable zip support using zziplib.