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-- $XTermId: INSTALL,v 1.94 2005/11/03 13:17:26 tom Exp $
-- $XFree86: xc/programs/xterm/INSTALL,v 3.40 2005/11/03 13:17:26 dickey Exp $
-- Thomas E. Dickey

Xterm is normally built as part of the X Window System source tree, using
imake to generate a Makefile from Imakefile.  You can also use the
configure script to generate a Makefile from Makefile.in:

	+ If you have imake (or xmkmf), then you can use those directly,
	  or use the configure script, which normally uses those tools
	  to obtain the special definitions needed to build xterm.

	  Ultimately, imake will not be necessary, since it is possible
	  to add configure tests that derive the information that imake
	  would supply.

	+ You need the Athena widgets (or a clone, such as Xaw3d or
	  neXtaw), to provide the popup menus.

Even if you have imake, the configure script is still convenient because
it allows you to build different configurations more easily than with
imake, simply by specifying options to the configure script.

Options:
-------

Autoconf configure scripts recognize two types of application-defined
options, enable/disable and with/without.  The latter, by convention, are
used for denoting inclusion of external packages, while the former denote
enabling/disabling of internal features.  The configure --help option lists
the available options.  This script uses "enable" and "disable" to indicate
the sense of the default behavior.

The options (in alphabetic order):

  --disable-16-color      disable 16-color support

	Do not compile-in code to recognize aixterm-style control sequences
	that support color values 8-15.

	Most color applications know only about 8 ANSI colors, but some
	(e.g., ones built with ncurses) do.

  --disable-active-icon   disable X11R6.3 active-icon feature

	Do not compile-in code to support the active-icon feature.  This is
	not configured on systems (e.g., X11R5) which lack the library
	support needed.

	Xterms with an active icon continue to respond to input and update
	their display when iconified.  Not all window managers support
	active icons.  Those that do include fvwm, olvwm and mwm.

  --disable-ansi-color    disable ANSI color

  	Do not compile-in code for ANSI colors.

  --disable-blink-cursor  disable support for blinking cursor

	Do not compile-in code that implements a blinking cursor.  The blinking
	cursor is enabled either by resource setting or by popup menu entry.

  --disable-bold-color    disable PC-style mapping of bold colors

	Do not compile-in code that maps colors 8-15 to bold versions of
	colors 0-7.

	Some applications have hardcoded logic that assumes this.  It does
	not interfere with the 16-color support.

  --disable-boxchars      disable fallback-support for box chars

  	Do not compile-in code to generate approximations for box/graphic
	characters.

	Most fonts do not contain the vt100-style graphic characters in
	positions 0-31.  Many applications use the line-drawing characters,
	e.g., to make boxes.  When xterm loads a font, it checks if those
	characters are present, and draws its own if they are missing.

  --disable-c1-print      disallow -k8 option for printable 128-159],

	Use this option to suppress support for nonstandard use of codes
	128-159, which normally are considered control characters.  Some users
	have fonts which use those positions.  The default value for the
	allowC1Printable resource is false, so this feature does not impact
	normal users.

  --disable-color-class   disable color class resources

	Use this option to change most of the color resources to use Foreground
	as the color class.  This is the older (before patch #157) behavior
	which has the drawback that setting the Foreground resource on most
	platforms prevents use of color since the class is evaluated before
	the instance.

  --disable-color-mode    disable default colorMode resource

  	Do not compile-in code that sets the default value of the colorMode
	resource to ``true''.

  --disable-doublechars   disable support for double-size chars

  	Do not compile-in code that supports font-manipulation needed to
	implement vt100-style double-sized characters.

  --disable-echo          test: display "compiling" commands

  	Modify the generated Makefile so that most compiler options are
	not shown.  This makes it simpler to read a build log and see the
	actual warning messages.

  --disable-freetype      disable freetype library-support

 	Do not use freetype libraries if they are found.  Normally they will
	be used automatically.

  --disable-full-tgetent  disable check for termcap library

  	Do not look for the tgetent() function specifically in the termcap
	library, accept the first library (from termlib, ncurses and curses)
	which contains this function rather than continuing to search for
	a termcap implementation rather than terminfo.  The former would
	supply the complete $TERMCAP data needed for some legacy programs.

  --disable-highlighting  disable support for color highlighting

  	Do not compile-in code that allows the selected region to be a
	different color than the reverse of foreground/background colors.

	See the discussion of highlightColor in the manual.

  --disable-i18n          disable internationalization

  	Do not compile-in code to handle multi-byte characters.  This is
	related to, but not identical with the input method logic.

  --disable-imake         disable use of imake for definitions

  	Do not attempt to use imake to determine compiler options.

	The main.c file has many ifdef's which rely on obscure combinations
	known only to imake.  The configure script implements only a
	portion of the tests needed to supplant imake.

  --disable-initial-erase disable setup for stty erase

	Do not compile-in code which aligns the stty erase and the backarrow
	key.  When compiled-in, xterm will optionally use the pty's sense
	of stty erase and apply that to the backarrow mode (sending 8 or 127),
	or go the other way, setting stty erase to match xterm's configuration.

  --disable-input-method  disable input-method

	Do not compile-in code for "input method".  This is an X11R6
	feature which deals with translation of composite characters.

	Some users report problems with their configuration, e.g., messages
	stating that there is no input method defined for the given preedit
	type.  If you do not need input method (and are troubled by the
	warning messages), it is safe to disable this option.

  --disable-maximize      disable actions for iconify/deiconify/maximize/restore

	Do not compile-in code that implements runtime 'actions' for
	iconifying, maximizing, etc.

	Most users will find that the window manager is more suitable for
	this sort of manipulation than putting the capabilities into xterm.

  --disable-num-lock      disable NumLock keypad support

	Do not compile-in code that looks for the actual NumLock key to
	support vt100/vt220 keypad translation.

	This is used in xterm to simplify logic, and to workaround some
	quirks of the keyboard tables.  Use the ``numLock'' resource to
	disable this feature if you must customize xterm in some other way.

	(The same ifdef controls the metaSendsEscape support).

  --disable-pty-handshake disable support for pty handshakes

	This feature is used to ensure that the child process's terminal modes
	match the parent's.  In particular, it addresses a problem where the
	terminal size is not defined in the stty settings.

  --disable-rightbar      disable right-scrollbar support

  	Do not compile-in code that supports a scrollbar on the right.

	Left/right scrollbars are a matter of taste.  Some older libraries
	(e.g., X11R5) do not perform the geometry computation correctly,
	leaving the right scrollbar incorrectly positioned after changing
	the font size.

  --disable-samename      disable check for redundant name-change

	Do not compile-in code that suppresses redundant updates to the
	titlebar when the text has not changed.

  --disable-session-mgt   enable support for session management

	Do not compile-in code which adds simple session management hooks which
	are used when closing an xterm.  Normally the code is compiled-in,
	except for systems which do not support it.

  --disable-setuid        disable setuid/setgid

	Do not install xterm using setuid or setgid permissions.  Drop setuid
	and setgid permissions on startup.  This is done if you have linked
	xterm with the utempter library, but may also be useful for systems
	where the pseudoterminal and utmp interfaces are wrapped so that xterm
	does not require these permissions.

  --disable-tek4014       disable tek4014 emulation

  	Do not compile-in code to support Tektronix 4014 emulation.

	This reduces the executable size by 17% (checked 1999/3/13).

	Some people use the Tektronix emulation (which has been in xterm
	for many years) as an example of code bloat, though this is not an
	accurate impression.

  --disable-vt52          disable VT52 emulation

  	Do not compile-in code to support vt52 emulation.

	A genuine vt100 emulates a vt52.

  --disable-ziconbeep     disable -ziconbeep option

	Do not compile-in code that modifies the icon's title and sounds a
	beep when they receive output.

  --enable-256-color      enable 256-color support

  	Compile-in code that interprets SGR 38 and 48 for 256-colors.

  --enable-88-color       enable 88-color support

	Compile-in code that interprets SGR 38 and 48 for 88-colors.

  --enable-broken-osc     allow broken Linux OSC-strings],

	Compile-in code to accommodate scripts that write Linux's malformed
	palette control strings without checking.  The result makes xterm
	appear to freeze.  This workaround makes xterm ignore the strings,
	and is compiled-in by default for Linux.

  --enable-broken-st      allow broken string-terminators],

	Compile-in code that works around a bug in some ISDN routers (and
	possibly other applications written by the same people):  they send an
	unterminated control string in their banner text, making xterm freeze.
	The workaround tells xterm to stop processing the control string when
	it receives one of the whitespace control characters such as newline.
	That was the behavior before patch #171.

  --enable-dabbrev        enable dynamic-abbreviation support

	Compile-in support for "dabbrev-expand()" action and related key
	translation.

  --enable-dec-locator    enable DECterm Locator support
	Add support for DEC Locator control sequences for xterm:

		DECEFR - Enable Filter Rectangle
	        DECELR - Enable Locator Reports
		DECSLE - Select Locator Events
		DECRQLP - Request Locator Position

	This allows the xterm mouse to be used with applications that use the
	DEC Locator sequences, such as VAX Tpu, or SMG$ based applications.

  --enable-hp-fkeys       enable support for HP-style function keys

  	Compile-in code to support HP-style function keys.

  --enable-load-vt-fonts  enable load-vt-fonts() action

  	Compile-in code that allows user to define load different VT-font
	definitions at runtime.

  --enable-logfile-exec   enable exec'd logfile filter

  	Compile-in code that allows logging piped via an external filter.

  --enable-logging        enable logging

  	Compile-in code that allows logging.

	Logging was disabled in X11R5 xterm because of security problems.
	They were addressed in X11R6, but the feature was not reinstated.

  --enable-luit           enable support for luit filter (Unicode translation)

	Luit is a filter that can be run between an arbitrary application and a
	UTF-8 terminal emulator.  It will convert application output from the
	locale's encoding into UTF-8, and convert terminal input from UTF-8
	into the locale's encoding.

	This sets "--enable-wide-chars" as a side-effect.

  --enable-mini-luit      enable support for poor man's luit filter (Latin-9)

	Provide built-in support for Latin-9, relying on having specified
	Unicode (ISO10646) fonts and setting the locale resource to "checkfont".

	This sets "--enable-luit" as a side-effect.

  --enable-narrowproto    enable narrow prototypes for X libraries

	Originally xterm was built using imake rather than a configure script. 
	One feature of imake that is not possible to guess within the
	configure script is the wide-prototype compile-time definition
	NARROWPROTO.  When this is not set properly, the Athena widget
	scrollbars do not work properly.  xterm's configure script has a
	fallback case which allows disabling imake.  However, this is moot
	with the Xorg "modular" build, whose compiler options are unrelated to
	imake or older versions of any libraries that it may distribute.  In
	this case, the configure script needs some help.  Use this option to
	enable or disable NARROW proto (and disable imake with the
	--disable-imake option) to match the whims of Xorg hackers.

	For instance

		configure --disable-imake --disable-narrowproto

  --enable-paste64        enable support for bracketed paste mode

	Compile-in code to support experimental bracketed paste mode, i.e.,
	provide functions for setting/getting the selection data.

	(see ctlseqs.ms description of OSC 52).

  --enable-readline-mouse enable support for mouse in readline applications

	Compile-in code to support experimental bracketed paste mode, i.e.,
	provide functions for setting/getting the selection data.  Essentially
	this puts xterm into a mode that sends special function-key strings to
	bracket the data.

	(See --enable-paste64, which fits xterm's protocol better).

  --enable-sco-fkeys      enable support for SCO-style function keys

  	Compile-in code to support SCO-style function keys.

  --enable-tcap-query     enable termcap query/report

	Compile-in code to support experimental DCS '+' control sequence, which
	allows an application to ask xterm what control sequences it would
	transmit for specified function keys, given the termcap or terminfo
	names.

  --enable-toolbar        enable pulldown menus on toolbar

  	Compile-in code that builds a toolbar with pulldown menus.  The
	normal popup menus are still available.

	This is an experimental option.  As of patch #206, it is known to
	work well with fvwm, but not as well with some other window managers,
	e.g., KDE's Kwin and IceWM.

	In addition to isolated layout problems, it is reported that some
	flavors of the Athena widget library perform badly with ISO-10646
	fonts.  You can work around those by setting the menu fonts to
	an ISO-8859 variant in your X resources.

  --enable-trace          test: set to enable debugging traces

  	Compile-in code to trace xterm's internal states.

	This is a debugging feature.  It causes xterm to produce two files
	(Trace-parent.out and Trace-child.out).

  --enable-warnings       test: turn on GCC compiler warnings

	Modify the generate Makefile to turn on gcc compiler warnings.

	I use this option regularly, and correct all but a few (difficult)
	problems.

  --enable-wide-chars     enable wide-character support

  	Compile-in code that supports 16-bit characters.  Includes support
	for UTF-8.

  --enable-xmc-glitch     test: enable xmc magic-cookie emulation

  	Compile-in code that simulates the terminfo "magic cookie" glitch.

	This is for testing ncurses.

  --with-Xaw3d            link with Xaw 3d library

  	Look for, compile and link with the Xaw 3d widget library.

  --with-XawPlus          link with Athena-Plus library

  	Look for, compile and link with the Xaw Plus widget library.

  --with-freetype-cflags  -D/-I options for compiling with FreeType library

	Override options provided by xft-config or freetype-config.

  --with-freetype-libs    -L/-l options for linking with FreeType library

	Override options provided by xft-config or freetype-config.

  --with-neXtaw           link with neXT Athena library

  	Look for, compile and link with the neXT Athena widget library.

  --with-own-terminfo=P   set default $TERMINFO (default: from environment)

  	Modify the generated Makefile to set the target for the 'install-ti'
	rule to point to the given directory.

	If you have the $TERMINFO variable defined in your environment, the
	configure script will use that value.  If no option and no variable
	are are given, the configure script uses /usr/lib/terminfo, if it
	exists.

	You do not have to run "make install-ti", if there is already a
	workable terminfo description.  Be advised, however, that the
	common variety of "xterm-color" is not suited for xterm, but is
	directed to other variations (such as nxterm) which do not
	support the back-color erase capability.

  --with-reference=XXX    program to use as permissions-reference

	To install xterm with setuid permissions, the scripts usually compare
	it with a previous install.  That works well for individual
	maintainers, but can be a problem for packagers who may be
	cross-compiling, etc.  This option lets the package builder specify
	the file used for permissions reference.

  --with-setuid=XXX       use the given setuid user

	Install xterm setuid'd to the given user.  If no parameter value
	is given, assume it is root.

	See also --with-utmp-setgid and --with-utempter, which manipulate
	the setgid group.

  --with-terminal-id[=V]  set default decTerminalID (default: vt100)

  	Set the default emulation level.

	DEC terminals vt52/vt100/vt220/etc form a series where succeeding
	models emulate features of the older terminals.  While most
	features of these terminals are recognized by xterm at all levels,
	a few behave differently according to the emulation level.

	You can always override this with the command-line option "-ti".

  --with-terminal-type=T  set default $TERM (default: xterm)

	Set the default value for $TERM.  Xterm supports legacy termcap
	applications by constructing a modified version of the $TERMCAP
	variable at initialization, which supplies the resulting screen
	size.  It also sets $TERM, if not already set, for use by programs
	running within xterm.

	The default value "xterm", can be overridden to avoid conflict
	with older versions of xterm, e.g., those that do not implement
	vt220 emulation.

	You can always override this with the command-line option "-tn".

  --with-utempter         use utempter library for access to utmp

	The utempter library is a set-uid wrapper for the utmp facility.
	On systems with Unix98 pty's, xterm can use this library when
	available so it need not be installed set-uid.

  --with-utmp-setgid      use setgid for access to utmp

	The option value specifies a group to use when installing.
	xterm will be installed with setgid privilege to this group.
	At runtime, xterm will drop the setuid privilege immediately
	after opening the pseudo-terminal, and will have only the
	group privilege needed to access the utmp file.  This relies
	on having POSIX setuid behavior.