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+CONFIGURE OPTIONS
+    General hint: if you get compile errors, then likely your configuration
+    hasn't been tested well. Either try with "--enable-everything" or use
+    the default configuration (i.e. no "--enable-xxx" or "--disable-xxx"
+    switches). Of course, you should always report when a combination
+    doesn't work, so it can be fixed. Marc Lehmann <rxvt@schmorp.de>.
+
+    All
+
+    --enable-everything
+        Add (or remove) support for all non-multichoice options listed in
+        "./configure --help", except for "--enable-assert" and
+        "--enable-256-color".
+
+        You can specify this and then disable options you do not like by
+        *following* this with the appropriate "--disable-..." arguments, or
+        you can start with a minimal configuration by specifying
+        "--disable-everything" and than adding just the "--enable-..."
+        arguments you want.
+
+    --enable-xft (default: on)
+        Add support for Xft (anti-aliased, 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.
+
+    --enable-font-styles (default: on)
+        Add support for bold, *italic* and *bold italic* font styles. The
+        fonts can be set manually or automatically.
+
+    --with-codesets=CS,... (default: all)
+        Compile in support for additional codeset (encoding) groups ("eu",
+        "vn" are always compiled in, which includes most 8-bit character
+        sets). These codeset tables are used for driving X11 core fonts,
+        they are not required for Xft fonts, although having them compiled
+        in lets rxvt-unicode choose replacement fonts more intelligently.
+        Compiling them in will make your binary bigger (all of together cost
+        about 700kB), but it doesn't increase memory usage unless you use a
+        font requiring one of these encodings.
+
+   all             all available codeset groups 
+   zh              common chinese encodings 
+   zh_ext          rarely used but very big chinese encodings 
+   jp              common japanese encodings 
+   jp_ext          rarely used but big japanese encodings 
+   kr              korean encodings 
+    --enable-xim (default: on)
+        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-unicode3 (default: off)
+        Recommended to stay off unless you really need non-BMP characters.
+
+        Enable direct support for displaying unicode codepoints above 65535
+        (the basic multilingual page). This increases storage requirements
+        per character from 2 to 4 bytes. X11 fonts do not yet support these
+        extra characters, but Xft does.
+
+        Please note that rxvt-unicode can store unicode code points >65535
+        even without this flag, but the number of such characters is limited
+        to a few thousand (shared with combining characters, see next
+        switch), and right now rxvt-unicode cannot display them
+        (input/output and cut&paste still work, though).
+
+    --enable-combining (default: on)
+        Enable automatic composition of combining characters into composite
+        characters. This is required for proper viewing of text where
+        accents are encoded as separate unicode characters. This is done by
+        using precomposed characters when available or creating new
+        pseudo-characters when no precomposed form exists.
+
+        Without --enable-unicode3, the number of additional precomposed
+        characters is somewhat limited (the 6400 private use characters will
+        be (ab-)used). With --enable-unicode3, no practical limit exists.
+
+        This option will also enable storage (but not display) of characters
+        beyond plane 0 (>65535) when --enable-unicode3 was not specified.
+
+        The combining table also contains entries for arabic presentation
+        forms, but these are not currently used. Bug me if you want these to
+        be used (and tell me how these are to be used...).
+
+    --enable-fallback[=CLASS] (default: Rxvt)
+        When reading resource settings, also read settings for class CLASS.
+        To disable resource fallback use --disable-fallback.
+
+    --with-res-name=NAME (default: urxvt)
+        Use the given name as default application name when reading
+        resources. Specify --with-res-name=rxvt to replace rxvt.
+
+    --with-res-class=CLASS (default: URxvt)
+        Use the given class as default application class when reading
+        resources. Specify --with-res-class=Rxvt to replace rxvt.
+
+    --enable-utmp (default: on)
+        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 (default: on)
+        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 (default: on)
+        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-pixbuf (default: on)
+        Add support for GDK-PixBuf to be used for background images. It adds
+        support for many file formats including JPG, PNG, TIFF, GIF, XPM,
+        BMP, ICO and TGA.
+
+    --enable-startup-notification (default: on)
+        Add support for freedesktop startup notifications. This allows
+        window managers to display some kind of progress indicator during
+        startup.
+
+    --enable-transparency (default: on)
+        Add support for using the root pixmap as background to simulate
+        transparency. Note that this feature depends on libXrender and on
+        the availability of the RENDER extension in the X server.
+
+    --enable-fading (default: on)
+        Add support for fading the text when focus is lost.
+
+    --enable-rxvt-scroll (default: on)
+        Add support for the original rxvt scrollbar.
+
+    --enable-next-scroll (default: on)
+        Add support for a NeXT-like scrollbar.
+
+    --enable-xterm-scroll (default: on)
+        Add support for an Xterm-like scrollbar.
+
+    --disable-backspace-key
+        Removes any handling of the backspace key by us - let the X server
+        do it.
+
+    --disable-delete-key
+        Removes any handling of the delete key by us - let the X server do
+        it.
+
+    --disable-resources
+        Removes any support for resource checking.
+
+    --disable-swapscreen
+        Remove support for secondary/swap screen.
+
+    --enable-frills (default: on)
+        Add support for many small features that are not essential but nice
+        to have. Normally you want this, but for very small binaries you may
+        want to disable this.
+
+        A non-exhaustive list of features enabled by "--enable-frills"
+        (possibly in combination with other switches) is:
+
+          MWM-hints
+          EWMH-hints (pid, utf8 names) and protocols (ping)
+          urgency hint
+          separate underline colour (-underlineColor)
+          settable border widths and borderless switch (-w, -b, -bl)
+          visual depth selection (-depth)
+          settable extra linespacing (-lsp)
+          iso-14755 5.1 (basic) support
+          tripleclickwords (-tcw)
+          settable insecure mode (-insecure)
+          keysym remapping support
+          cursor blinking and underline cursor (-bc, -uc)
+          XEmbed support (-embed)
+          user-pty (-pty-fd)
+          hold on exit (-hold)
+          compile in built-in block graphics
+          skip builtin block graphics (-sbg)
+          separate highlight colour (-highlightColor, -highlightTextColor)
+          extended mouse reporting modes (1005 and 1015).
+          visual selection via -visual and -depth.
+
+        It also enables some non-essential features otherwise disabled, such
+        as:
+
+          some round-trip time optimisations
+          nearest colour allocation on pseudocolor screens
+          UTF8_STRING support for selection
+          sgr modes 90..97 and 100..107
+          backindex and forwardindex escape sequences
+          view change/zero scrollback escape sequences
+          locale switching escape sequence
+          window op and some xterm/OSC escape sequences
+          rectangular selections
+          trailing space removal for selections
+          verbose X error handling
+
+    --enable-iso14755 (default: on)
+        Enable extended ISO 14755 support (see urxvt(1)). Basic support
+        (section 5.1) is enabled by "--enable-frills", while support for
+        5.2, 5.3 and 5.4 is enabled with this switch.
+
+    --enable-keepscrolling (default: on)
+        Add support for continual scrolling of the display when you hold the
+        mouse button down on a scrollbar arrow.
+
+    --enable-selectionscrolling (default: on)
+        Add support for scrolling when the selection moves to the top or
+        bottom of the screen.
+
+    --enable-mousewheel (default: on)
+        Add support for scrolling via mouse wheel or buttons 4 & 5.
+
+    --enable-slipwheeling (default: on)
+        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-smart-resize (default: off)
+        Add smart growth/shrink behaviour when resizing. This should keep
+        the window corner which is closest to a corner of the screen in a
+        fixed position.
+
+    --enable-text-blink (default: on)
+        Add support for blinking text.
+
+    --enable-pointer-blank (default: on)
+        Add support to have the pointer disappear when typing or inactive.
+
+    --enable-perl (default: on)
+        Enable an embedded perl interpreter. See the urxvtperl(3) manpage
+        for more info on this feature, or the files in src/perl/ for the
+        extensions that are installed by default. The perl interpreter that
+        is used can be specified via the "PERL" environment variable when
+        running configure. Even when compiled in, perl will *not* be
+        initialised when all extensions have been disabled "-pe ""
+        --perl-ext-common """, so it should be safe to enable from a
+        resource standpoint.
+
+    --enable-assert (default: off)
+        Enables the assertions in the code, normally disabled. This switch
+        is only useful when developing rxvt-unicode.
+
+    --enable-256-color (default: off)
+        Force use of so-called 256 colour mode, to work around buggy
+        applications that do not support termcap/terminfo, or simply improve
+        support for applications hardcoding the xterm 256 colour table.
+
+        This switch breaks termcap/terminfo compatibility to
+        "TERM=rxvt-unicode", and consequently sets "TERM" to
+        "rxvt-unicode-256color" by default (doc/etc/ contains
+        termcap/terminfo definitions for both).
+
+        It also results in higher memory usage and can slow down urxvt
+        dramatically when more than six fonts are in use by a terminal
+        instance.
+
+    --with-name=NAME (default: urxvt)
+        Set the basename for the installed binaries, resulting in "urxvt",
+        "urxvtd" etc.). Specify "--with-name=rxvt" to replace with "rxvt".
+
+    --with-term=NAME (default: rxvt-unicode)
+        Change the environmental variable for the terminal to NAME.
+
+    --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?).
+