--enable-everything
        add support for all non-multichoice options listed in "./configure
        --help".  Note that unlike other enable options this is order
        dependant.  You can specify this and then disable options which
        this enables by _following_ this with the appropriate commands.
--enable-xft
	add support for xft (anti-aliases, among others) fonts. xft fonts are
        slower and require lots of memory, but as long as you don't use them,
        you don't pay for them.
--with-codesets=NAME,...
	compile in support for additional codeset groups:
        jp	common japanese encodings
        jp_ext	rarely used but big japanese encodings
        kr	korean encodings
        cn	common chinese encodings
        cn_ext	rarely used but very big chinese encodigs
        all	all of the above
--enable-unicode3
	enable support for unicode codepoints above 65535 (the basic
        multilingual page). This increases storage requirements per character
        from 2 to 4 bytes and is not too useful as font support in X11 and Xft
        is largely missing, although cut & paste will work correctly, as will
        displaying, if you have the right font(s).
--enable-utmp
	write user and tty to utmp file (used by programs like ``w'') at
	start of rxvt execution and delete information when rxvt exits.
--enable-wtmp
	write user and tty to wtmp file (used by programs like ``last'') at
	start of rxvt execution and write logout when rxvt exits.  This
	option requires --enable-utmp to also be specified.
--enable-lastlog
	write user and tty to lastlog file (used by programs like
	``lastlogin'') at start of rxvt execution.  This option requires
	--enable-utmp to also be specified.
--enable-xpm-background
 	add support for XPM background pixmaps
--enable-transparency
	add support for inheriting parent backgrounds thus giving a fake
	transparency to the term
--enable-menubar
	add support for our menu bar system (this interacts badly with
        dynamic locale switching currently)
--enable-rxvt-scroll
	add support for the original rxvt scrollbar
--enable-next-scroll
	add support for a NeXT-like scrollbar
--enable-xterm-scroll
	add support for an Xterm-like scrollbar
--enable-plain-scroll
        add support for a very unobtrusive, plain-looking scrollbar that
        is the favourite of the rxvt-unicode author, having used it for
        many years.
--enable-half-shadow
	make shadows on the scrollbar only half the normal width & height.
	only applicable to rxvt scrollbars
--enable-xim
	add support for XIM (X Input Method) protocol. This allows using
	alternative input methods (e.g. kinput2) and will also correctly
	set up the input for people using dead keys or compose keys.
--enable-ttygid
	change tty device setting to group "tty" - only use this if
        your system uses this type of security
--disable-backspace-key
	disable any handling of the backspace key by us - let the X server
	do it
--disable-delete-key
	disable any handling of the delete key by us - let the X server
	do it
--disable-resources
	remove all resources checking
--enable-xgetdefault
	make resources checking via XGetDefault() instead of our small
	version which only checks ~/.Xdefaults, or if that doesn't exist
	then ~/.Xresources
--enable-strings
	add support for our possibly faster memset() function and other
	various routines, overriding your system's versions which may
	have been hand-crafted in assembly or may require extra libraries
	to link in. (this breaks ANSI-C rules and has problems on many
        GNU/Linux systems).
--disable-swapscreen
	remove support for swap screen
--enable-frills
	add support for some lesser used features
--enable-linespace
	add support to provide user specified line spacing between text rows
--enable-keepscrolling
	add support for continual scrolling of the display when you hold
	the mouse button down on a scrollbar arrow
--enable-mousewheel
	add support for scrolling via mouse wheel or buttons 4 & 5
--enable-slipwheeling
	add support for continual scrolling (using the mouse wheel as an
	accelerator) while the control key is held down.  This option
	requires --enable-mousewheel to also be specified.
--enable-old-selection
	remove support for reverting the mouse selection style to that
	of v2.20 (and prior)
--disable-new-selection
	remove support for mouse selection style like that of xterm
--enable-dmalloc
	use Gray Watson's malloc - which is good for debugging
	See  http://www.letters.com/dmalloc/  for details
        If you use either this or the next option, you may need to
	edit src/Makefile after compiling to point DINCLUDE and DLIB to
	the right places.
        You can only use either this option and the following (should
	you use either) 
--enable-dlmalloc
	use Doug Lea's malloc - which is good for a production version
	See  http://g.oswego.edu/dl/html/malloc.html  for details
--enable-smart-resize
	add smart growth/shrink behaviour when changing font size
	via from hot keys.  This should keep in a fixed position the
	rxvt corner which is closest to a corner of the screen
--enable-256-color
        add support for 256 colours rather than the base 16 colours
--enable-cursor-blink
	add support for a blinking cursor
--enable-pointer-blank
	add support to have the pointer disappear when typing or inactive
--with-term=NAME
	change the environmental variable for the terminal to NAME
	(default "rxvt")
--with-terminfo=PATH
	change the environmental variable for the path to the terminfo
	tree to PATH
--with-x
	use the X Window System (pretty much default, eh?)
--with-xpm-includes=DIR
	look for the XPM includes in DIR
--with-xpm-library=DIR
	look for the XPM library in DIR
--with-xpm
	not needed - define via --enable-xpm-background