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xenocara/app/xterm/INSTALL
matthieu 94323bce53 Update to xterm 320. Tested by jsg@ Thanks.
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-- $XTermId: INSTALL,v 1.158 2015/08/10 23:38:32 tom Exp $
-------------------------------------------------------------------------------
-- Copyright 1997-2014,2015 by Thomas E. Dickey
--
-- All Rights Reserved
--
-- Permission is hereby granted, free of charge, to any person obtaining a
-- copy of this software and associated documentation files (the
-- "Software"), to deal in the Software without restriction, including
-- without limitation the rights to use, copy, modify, merge, publish,
-- distribute, sublicense, and/or sell copies of the Software, and to
-- permit persons to whom the Software is furnished to do so, subject to
-- the following conditions:
--
-- The above copyright notice and this permission notice shall be included
-- in all copies or substantial portions of the Software.
--
-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-- IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
-- CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
-- TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
-- SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
--
-- Except as contained in this notice, the name(s) of the above copyright
-- holders shall not be used in advertising or otherwise to promote the
-- sale, use or other dealings in this Software without prior written
-- authorization.
-------------------------------------------------------------------------------
Xterm was originally built as part of the X Window System source tree, using
imake to generate a Makefile from Imakefile.
An example Imakefile is provided for legacy use.
The preferred method uses the configure script to generate a Makefile from
Makefile.in
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-broken-st disallow broken string-terminators],
Do not 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.
See also --enable-broken-osc
--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-desktop disable install of xterm desktop files
Do not install the xterm desktop files, used in menus.
These use the icons installed in the --with-icondir option.
Use the environment variable $DESKTOP_FLAGS to supply options
required by desktop-file-install.
Note: If desktop-utils is not found they will not be installed anyway.
--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-fifo-lines enable FIFO-storage for saved-lines
With patch #244, xterm by default stores saved-lines in a FIFO
(circular buffer), which improves performance when the number of saved
lines is large. Disable this option to revert to the pre-244 layout.
--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-leaks test: free permanent memory, analyze leaks
Compile-in code which frees memory which might confuse a leak-testing
tool. Normally these chunks of memory are retained as long as xterm
is running.
--disable-luit disable 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 is normally enabled, relying upon "--enable-wide-chars".
--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-openpty disable openpty, prefer other interfaces
Do not check for, or use openpty(). Instead, use other interfaces such
as posix_openpt(). Modern (sic) BSD systems should have a workable
openpty() interface. Older systems may not.
--disable-paste64 disable support for bracketed paste mode
Do not 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).
--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-rectangles disable VT420 rectangle support
Do not compile-in code to support VT420 rectangle control-sequences.
--disable-regex disable regular-expression selections
Do not compile-in code to support the "regex" option for multiple
mouse clicks.
--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-rpath-hack don't add rpath options for additional libraries
By default, the configure script looks for libraries in unusual places
and adds an rpath linker option to help.
--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-selection-ops disable selection operations
Do not compile-in code to support the actions which allow users
to bind keys that use the selection or extract data from the screen.
--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-setgid disable setgid
Do not install xterm using setuid/setgid permissions. Drop setgid
permissions on startup.
--disable-setuid disable setuid
Do not install xterm using setuid/setgid permissions. Drop setuid
permissions on startup.
--disable-sun-fkeys
Do not compile-in code to support Sun-style function keys.
--disable-tcap-fkeys disable termcap function-keys
Do not compile-in code to support feature which allows xterm to use the
function-key definitions from the termcap/terminfo entry which it used
to set the $TERM variable on startup.
--disable-tcap-query disable termcap query/report
Do not compile-in code to support 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.
--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-wide-attrs disable wide-attribute support
Xterm's base attributes include all of those used in DEC terminals.
ISO 6429 defines a few more which historically have found little use.
Some people find these amusing.
This is normally enabled.
--disable-wide-chars disable wide-character support
The wide-character code supports Unicode and UTF-8.
This is normally enabled.
--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-16bit-chars enable 16-bit characters support
Enable wide-character support, but store only 16-bits for each wide
character. Unicode values can be larger than 16-bits, up to 21-bits.
This uses less memory, but is less complete. However, most languages
are covered by the 16-bit encoding.
--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-alt-sends-esc set default altSendsEscape resource (default: no)
This sets the default resource value, which is shown in the manpage.
--enable-backarrow-key set default backarrowKey resource (default: true)
This sets the default resource value, which is shown in the manpage.
--enable-backarrow-is-erase set default backarrowKeyIsErase resource (default: false)
This sets the default resource value, which is shown in the manpage.
--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-builtin-xpms compile-in icon data
Compile-in X pixmap data for these icons:
filled-xterm
mini.xterm
xterm-color
xterm
at these sizes
16x16
32x32
48x48
--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-delete-is-del set default deleteIsDEL resource (default: maybe)
This sets the default resource value, which is shown in the manpage.
--enable-double-buffer enable double-buffering
Use experimental double-buffering for display to reduce flicker.
This option was introduced in patch #282; at that point it needs
further work because colors used for clearing the screen do not
match the expected behavior (see vttest for instance).
--enable-exec-xterm enable "spawn-new-terminal" action
If your platform supports the process filesystem "cwd" link,
compile-in support for the "spawn-new-terminal" action, which
allows you to define a key translation that runs a new xterm
using the same working directory as the current process within
xterm.
--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-meta-sends-esc set default metaSendsEscape resource (default: no)
This sets the default resource value, which is shown in the manpage.
--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 X.org "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 X.org hackers.
For instance
configure --disable-imake --disable-narrowproto
--enable-pty-erase set default ptyInitialErase resource (default: false)
This sets the default resource value, which is shown in the manpage.
--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-regis-graphics enable support for ReGIS graphics
Compile-in code to support experimental ReGIS graphics
--enable-sixel-graphics enable support for sixel-graphics
Compile-in code to support experimental sixel-graphics
--enable-sun-fkeys enable support for Sun-style function keys
Compile-in code to support Sun-style function keys.
--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-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-Xaw3dxft link with Xaw 3d xft library
Look for, compile and link with the Xaw 3d xft widget library.
--with-XawPlus link with Athena-Plus library
Look for, compile and link with the Xaw Plus widget library.
--with-app-class=XXX X resource class (default: XTerm)
Rename the X resource class, e.g., for packaging a development version
of xterm with different result names.
--with-app-defaults=DIR directory in which to install resource files (default: EPREFIX/lib/X11/app-defaults)
autoconf scripts assume that all of the files should be installed
under the same top-level directory. But X applications defaults
must be installed into a special directory, e.g.,
/usr/X11/lib/app-defaults
However, there is no standard for this pathname. The manual page
for X notes that the environment variable $XUSERFILESEARCHPATH can
specify a list of places where X searches for applications defaults.
Also, it may look in $XAPPLRESDIR, but that usually is not related
to where xterm might be installed. To keep it simple, the configure
script uses
EPREFIX/lib/X11/app-defaults
as the default (EPREFIX is --prefix). That makes it work normally
for most systems if --prefix is /usr. For other installs, e.g., to
/usr/local, you should use this option to customize the location to
match your system configuration.
Use --with-app-defaults=auto to ask the configure script to look in
a list of well-known locations for an existing directory.
Use --without-app-defaults or --with-app-defaults=no to disable the
feature.
--with-dmalloc test: use Gray Watson's dmalloc library
Check for and link with dmalloc.
--with-dbmalloc test: use Conor Cahill's dbmalloc library
Check for and link with dbmalloc.
--with-desktop-category=XXX one or more desktop catgories or auto
This is a list of names. The configure script maps blanks and commas
to semicolons (";") which are used by the desktop utils as a separator.
The default value "auto" tells the configure script to look
at existing ".desktop" files for xterm and common terminal
emulators, to use those. If none are found, the script uses this
default:
System;TerminalEmulator;Utility;
--with-freetype-config configure script to use for FreeType
Use a specific option value to tell the configure script to try
just one of the variations:
"pkg*", e.g., pkg-config or pkgconfig uses whatever pkg-config
script was found.
otherwise, the parameter value is used as the name of the script
to try, using --cflags and --libs options.
Use --without-freetype-config to enable the --with-freetype-cflags
and --with-freetype-libs options.
The default value "auto" tells the configure script to try the
pkg-config script first, then freetype-config and finally xft-config.
--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-icon-name=NAME override icon name (default: xterm-color)
xterm comes with a choice of icons:
xterm-color: depicts a conventional terminal image, and is the default
icon used for icon-themes.
mini.xterm: a more iconic choice which is readily identifiable at
small sizes. This is used for window decoration, e.g., the
icon at the upper left corner in many window managers.
--with-icon-symlink=NAME create symbolic links to icon name (default: NONE)
This is a workaround for certain systems which translate icon names
containing "xterm", e.g., "xterm-color" into the single icon "xterm".
The option should also be harmless on a properly configured system.
If the option is used, its default value is "xterm". For each icon,
the makefile will strip the suffix (e.g., ".png"), as well as the part
of the filename which denotes the size (e.g., "_32x32" in an xpm file),
and constructs a link with that name to the icon.
If the option is unused, its default value is "NONE" (no link is made).
--with-icondir=DIR directory in which to install icon files (default: no)
The X libraries may automatically search these locations:
$HOME/.icons
$XDG_DATA_DIRS/icons
/usr/share/pixmaps
Alternatively, the last may be actually
/usr/X11R6/share/pixmaps
Use --with-icondir=auto to tell the configure script to search for
an existing directory from its list of well-known system locations.
See also
http://standards.freedesktop.org/icon-theme-spec/icon-theme-spec-latest.html
http://www.freedesktop.org/software/icon-theme/
By default, the option is disabled; it is useful only for the
--with-icon-theme option.
--with-icon-theme=XXX install icons into desktop theme (hicolor)
Install png and svg icons into the given desktop theme and customize
the .desktop files to use that theme. If no theme name is given,
the default is "hicolor". If this option is not given, the desktop
file will use the pixmap files.
--with-man2html[=XXX] use XXX rather than groff
Specify an alternative program to use for converting manpages and
control sequences document to html. If the option is given, its
default value is "man2html", otherwise it is "groff" with groff's
special options. The "man2html" script reads formatted nroff output
from its standard input, and writes html to its standard output. Other
input/output conventions are not currently supported.
See
http://invisible-island.net/scripts
for an up-to-date version of "man2html".
--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 background-color erase capability.
--with-pcre use PCRE for regular-expressions
If regular expressions are not disable (--disable-regex), use PCRE
rather than the POSIX regular expressions.
--with-pkg-config{=path} enable/disable use of pkg-config
The configure script looks for certain libraries which have well
established pkg-config scripts, and will use those settings if
available. Not all pkg-config scripts work; this option suppresses
the check and relies on normal library search paths.
--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-tty-group=XXX use XXX for the tty-group
If xterm is installed setuid'd to root, change the group of the tty
device to the given value on startup. Three cases are possible:
a) If this option is not given, the configure script will attempt to
find a suitable value (usually "tty"), and verify that it exists in
the group database.
b) If the option value is given, it will use the value even if it does
not exist in the group database (allowing packagers to work about
deficient environments).
c) If the option is disabled, e.g., --without-tty-group, the
permissions change will use the group-id of the process.
If xterm is not installed setuid'd to root, this option is not needed,
since it cannot change the tty device's ownership.
--with-valgrind test: use valgrind
Activate the --disable-leaks option, and ensure that "-g" is added to
CFLAGS.
--with-xpm=DIR use Xpm library for colored icon, may specify path
Use Xpm library to show colored icon in window decoration, e.g.,
title area.
Use --without-xpm to suppress this feature.
--with-xterm-symlink=XXX make symbolic link to installed xterm
If any of the configure options to modify the program name i.e.,
--program-prefix, --program-suffix or --program-transform-name
are given, this option allows the makefile to create a symbolic link,
e.g., to "xterm" on install. The option value gives the name for
the link, which defaults to "xterm".
Use --without-xterm-symlink to disable a link to "xterm" if none
is wanted.
Corresponding links are also made for "resize", "uxterm" and
"koi8rxterm", as well as the xterm manpage.
--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=XXX 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.
-- vile:txtmode
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