aalib			Enable aalib support.
abook			Enable abook support.
acl			Enable POSIX ACL support.
ads			Enable Windows Active Directory support.
agg			Enable agg support.
alsa			Enable ALSA support.
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.
apr1			Use Apache Portable Runtime 1.x rather than 0.x.
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.
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.
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-xml-statistics-server	Enable building in the statistics server 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.
cairo			Enable cairo support.
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.
cdparanoia		Use cdparanoia to rip CDDA media.
cgi			Enable CGI support.
chasen			Use ChaSen as the Japanese Morphological Analzer.
cjk			Enable Chinese/Japanese/Korean support.
clamav			Enable ClamAV support.
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.
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.
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.
dbus			Enable dbus (desktop bus) support.
debug			Enable debugging facilities in the package.
deliver-suid		Install deliver executable setuid root.
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.
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.
dts			Enable DTS Coherent Acoustics support.
dv			Enable usage of the libdv library.
dvdread			Enable reproduction of DVDs.
dvi			Enable device independent file format (mostly TeX) support.
eb			Enable EB dictionary library support.
ecl			Use Embeddable Common Lisp.
eekboard		Use eekboard for virtual keyboard 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-xaw3d		Emacs should use Xaw3D for the scrollbar.
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.
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.
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.
finger			Enable finger support.
firefox			Use firefox as gecko rendering engine.
firefox3		Use firefox3 as gecko rendering engine.
flac			Enable FLAC support.
fluidsynth		Enable MIDI support using fluidsynth.
freeradius-simul-use	Enable Simultaneous-Use.
freetype		Enable freetype support.
ftp			Enable File Transfer Protocol (FTP) support.
fts			Enable full-text searching.
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-java		Build the gcc Java frontend, tools and libraries.
gcc-objc		Build the gcc Objective-C frontend and libraries.
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.
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.
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.
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-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.
gtk			Enable support for GTK.
gtk2			Enable support for GTK2.
gtkspell		Enable gtkspell support.
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.
hping-suid		Install hping executable setuid root.
hpn-patch		High Performance Enabled SSH/SCP for OpenSSH.
hunspell		Add spell checking support using hunspell.
i586-optimized		Optimize for i586 (only).
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-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.
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.
iodbc			Enable ODBC support via iODBC.
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.
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.
lablgtk			Use lablgtk.
lablgtk1		Use lablgtk1 (GTK1).
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-bs			Add Bosnian language support.
lang-ca			Add Catalan language support.
lang-cs			Add Czech language support.
lang-da			Add Danish language support.
lang-de			Add German language support.
lang-el			Add Greek 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-fr			Add French 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-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.
libgcrypt		Use GNU cryptographic library.
libgpod			Enable libgpod support.
libiconv-cp932		Add supplemental support for CP932.
liblqr			Enable liblqr (liquid rescale) support.
libmms			Enable streaming from mms:// URLS using libmms.
libmp4v2		Enable libmp4v2 (MP4) support.
libmtp			Enable MTP via libmtp 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.
libvisual		Enable libvisual (audio visualisation) 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.
liferea-gtkhtml		Use libgtkhtml2 to render HTML.
liferea-mozilla		Use xulrunner to render HTML.
links			Use and enable support for the links browser.
links-zlib		Enable zlib support for the links WWW browser.
live			Enable live555 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.
lynx			Use and enable support for the lynx browser.
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.
marble			Enable marble (virtual globe) support.
mc-charset		Enable charset selection and conversion.
mc-edit			Enable internal editor.
mc-samba		Enable smb virtual file system.
mc-subshell		Enable support for subshell.
mc-vfs			Support for VFS (virtual file system).
mecab			Use MeCab as the Japanese Morphological Analzer.
mex			Enable matlab mex support (Linux and Solaris only).
migemo			Enable migemo (Japanese text search tool/library) support.
mikmod			Enable MikMod sound library.
mitshm			Enable MIT-SHM X extension support.
mlib			Enable usage of medialib (SunOS only).
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.
mozilla			Use mozilla as gecko rendering engine.
mozilla-enigmail	Enable the Enigmail OpenPGP extension.
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.
mpeg4ip			Enable mpeg4ip support.
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-menu		Enable support for user-defined menus.
mplayer-real		Enable usage of Real codecs.
mplayer-runtime-cpudetection	Enable CPU detection at run time.
mplayer-win32		Enable usage of Win32 DLLs (codecs).
mrtg-snmpv3		Enable SNMPv3 support.
mstats			Enable memory statistics.
musepack		Enable the portable Musepack decoder library.
musicbrainz		Enable musicbrainz support.
musicpd-lastfm		Enable Last.FM support in musicpd.
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.
nagios-nrpe-args	Enable argument passing via NRPE (possible security issues).
nas			Enable usage of the Network Audio System.
ncurses			Enable ncurses support.
ncursesw		Enable wide character ncurses support.
ndb-cluster		Build NDB Cluster support.
ndiff			Enable tool to compare Nmap scans.
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.
nls			Use native language support.
nntp			Enable Network News Transport Protocol (NNTP) support.
nntpcache-pgp		Enable pgp signed nocem support.
nspluginwrapper		Enable running non native netscape compatible plugins.
nss			Enable Network Security Services (NSS) support.
ocamlduce		Enable OcamlDuce support.
octave			Enable Octave support.
odbc			Enable ODBC support.
official-mozilla-branding	Use official Mozilla reg. trademarks and logos.
ogg			Enable Ogg support.
oniguruma		Support regular expressions via the oniguruma library.
online-tests		Requiring Internet connectivity for "make test".
openal			Enable OpenAL support.
opencore-amr		Enable OpenCORE Adaptive Multi-Rate speech codecs.
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.
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.
pdf			Enable PDF support.
perl			Enable Perl support.
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.
png			Enable PNG support.
poppler			Enable poppler-utils support.
postfix-milter		Build the milter with support for the Postfix MTA.
postfix-stress		Enable Postfix stress-adaptive behaviour.
prime			Use Prime for Kana-to-Kanji conversion.
proftpd-readme		Enable mod_readme.
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.
python			Enable Python support.
qdbm			Enable qdbm support.
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.
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.
rsaref			Use RSAREF 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.
samplerate		Enable libsamplerate support.
sane			Enable support for SANE scanners.
sane-backends-hp3900	Include HP3900 driver.
sasl			Enable SASL support.
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.
scmgit-gui		Build the GUI in Tcl/Tk.
sdl			Use SDL as display library.
seamonkey		Use seamonkey as gecko rendering engine.
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.
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.
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.
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-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-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.
ssl			Enable SSL support.
starttls		Enable TLS support.
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.
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.
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.
tin-use-inn-spool	Use the INN spool directories.
tls			Enable TLS support.
tokyocabinet		Enable Tokyo Cabinet support.
trn-inn			Use INN as NNTP client.
trn-nntpclnt		Use nntpclnt as NNTP client.
ucspi-ssl-perl		Enable Perl support in ucspi-ssl.
ucspi-tcp-nodefaultrbl	Remove the (nonexistent) default RBL from rblsmtpd.
uds			Enable support for Unix domain sockets.
uim			Enable UIM support.
uim-fep			Enable UIM FEP support.
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-hub		IRC hub server.
unrealircd-leaf		IRC leaf node server.
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.
uucp			Enable support for uucp.
uulib			Enable support for uulib.
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.
viewvc-php		Use php to colorize .php and .inc files.
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.
webvmail		Install CGI script for voicemail.
wide-curses		Enable wide curses support.
winbind			Enable name-service switch daemon support using Windows Servers.
wmf			Enable WMF support.
wnn4			Use wnn for Kana-to-Kanji conversion.
x11			Enable X11 support.
xapian-flint-backend	Enable "Flint" format Xapian database support.
xapian-quartz-backend	Enable "Quartz" format Xapian database support.
xaw			Enable Xaw support.
xblast-mini		Use a 480x392 window instead a 960x784 window in xblast.
xft2			Enable Xft support.
xim			Enable X Input Method 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.
xrandr			Enable Xrandr support.
xrender			Enable Xrender support.
xscreensaver-webcollage	Install webcollage screensaver.
xterm-256color		Enable 256 color support.
xterm-88color		Enable 88 color support.
xterm-luit		Enable locale <> UTF encoding translation.
xtest			Use XTEST Extension Library.
xvid			Enable usage of XVid codecs.
zenmap			Enable nmap GUI frontend.
ziplinks		Compress data before transmitting it between servers.
zlib			Enable support for zlib compression.
zsh-multibyte		Enable multibyte support in Zsh.
zziplib			Enable zip support using zziplib.