6 This file presents some general information about XEmacs. It is
7 primarily about the changes in recent XEmacs versions and its release
10 Use `C-c C-f' to move to the next equal level of outline, and
11 `C-c C-b' to move to previous equal level. `C-h m' will give more
12 info about the Outline mode. Many commands are also available through
15 Users who would like to know which capabilities have been introduced
16 in each release should look at the appropriate section of this file.
17 Starting with version 20.0, XEmacs includes ChangeLogs, which can be
18 consulted for a more detailed list of changes.
20 Users interested in some of the details of how XEmacs differs from GNU
21 Emacs should read the section "What's Different?" near the end of this
24 N.B. The term "GNU Emacs" refers to any release of Emacs Version
25 19 from the Free Software Foundation's GNU Project. (We do not
26 say just "Emacs" as Richard M. Stallman ["RMS"] prefers, because
27 it is clearly a more generic term.) The term "XEmacs" refers to
28 this program or to its predecessors "Era" and "Lucid Emacs". The
29 predecessor of all these program is called "Emacs 18". When no
30 particular version is implied, "Emacs" will be used.
33 * Changes in XEmacs 21.2
34 ========================
36 ** `delete-key-deletes-forward' now defaults to t.
38 `delete-key-deletes-forward' is the variable that regulates the
39 behaviour of the delete key on the systems that offer both a backspace
40 and a delete key. If set to nil, the key labeled "Delete" will delete
41 backward. If set to non-nil, the "Delete" key will delete forward,
42 except on keyboards where a "Backspace" key is not provided.
44 Unless our implementation has bugs, the only reason why you would want
45 to set `delete-key-deletes-forward' to nil is if you want to use the
46 Delete key to delete backwards, despite the presence (according to
47 Xlib) of a BackSpace key on the keyboard.
49 ** Interactive searching and matching case improvements.
51 Case sensitiveness in searching operations is normally controlled by
52 the variable `case-fold-search' (if non-nil, case is ignored while
53 searching). This mechanism has now been slightly improved for
54 interactive searches: if the search string (or regexp) contains
55 uppercase characters, the searching is forced to be case-sensitive,
58 The new behavior affects all functions performing interactive
59 searches, like `zap-to-char', `list-matching-lines', `tags-search'
60 etc. The incremental search facility has always behaved that way.
62 ** You can now create "indirect buffers", like in GNU Emacs. An
63 indirect buffer shares its text with another buffer ("base buffer"),
64 but has its own major mode, local variables, extents, and narrowing.
65 An indirect buffer has a name of its own, distinct from those of the
66 base buffer and all other buffers. An indirect buffer cannot itself
67 be visiting a file (though its base buffer can be). The base buffer
68 cannot itself be indirect.
70 Use (make-indirect-buffer BASE-BUFFER NAME) to make an indirect buffer
71 named NAME whose base is BASE-BUFFER. If BASE-BUFFER is itself an
72 indirect buffer, its base buffer is used as the base for the new
75 You can make an indirect buffer current, or switch to it in a window,
76 just as you would a non-indirect buffer.
78 The function `buffer-base-buffer' returns a buffer's base buffer or
79 nil, if given an ordinary (non-indirect) buffer. The function
80 `buffer-indirect-children' returns a list of the indirect children of
83 ** User names following the tilde character can now be completed at
84 file name prompts; e.g. `C-x C-f ~hni<TAB>' will complete to
85 `~hniksic/'. To make this operation faster, a cache of user names is
86 maintained internally.
89 * Lisp and internal changes in XEmacs 21.2
90 ==========================================
92 ** Much effort has been invested to make XEmacs Lisp faster:
94 *** Many basic lisp operations are now faster.
95 This is especially the case when running a Mule-enabled XEmacs.
97 A general overhaul of the lisp engine should produce a speedup of 1.4
98 in a Latin-1 XEmacs, and 2.1 in a Mule XEmacs. These numbers were
99 obtained running `(byte-compile "simple.el")', which should be a
100 pretty typical test of "pure" Lisp.
102 *** Lisp hash tables have been re-implemented. The Common Lisp style
103 hash table interface has been made standard, and moved from cl.el into
104 fast C code (See the section on hash tables in the XEmacs Lisp
105 Reference). A speedup factor of 3 can be expected with code that
106 makes intensive use of hash tables.
108 *** The garbage collector has been tuned, leading to a speedup of
111 *** The family of functions that iterate over lists, like `memq', and
112 `rassq', have been made a little faster (typically 1.3).
114 *** Lisp function calls are faster, by approximately a factor of two.
115 However, defining inline functions (via defsubst) still makes sense
118 *** Finally, a few functions have had dramatic performance
119 improvements. For example, `(last long-list)' is now 30 times faster.
121 Of course, your mileage will vary.
123 Many operations do not see any improvement. Surprisingly, running
124 (font-lock-fontify-buffer) does not use the Lisp engine much at all.
125 Speeding up your favorite slow operation is an excellent project to
126 improve XEmacs. Don't forget to profile!
128 ** XEmacs finally has an automated test suite!
129 Although this is not yet very sophisticated, it is already responsible
130 for several important bug fixes in XEmacs. To try it out, simply use
131 the makefile target `make check' after building XEmacs.
133 ** Hash tables have been reimplemented.
134 As was pointed out above, the standard interface to hash tables is now
135 the Common Lisp interface, as described in Common Lisp, the Language
136 (CLtL2, by Steele). The older interface (functions with names
137 containing the phrase `hashtable') will continue to work, but the
138 preferred interface now has names containing the phrase `hash-table'.
140 Here's the executive overview: create hash tables using
141 make-hash-table, and use gethash, puthash, remhash, maphash and
142 clrhash to manipulate entries in the hash table. See the (updated)
143 Lisp Reference Manual for details.
145 ** Lisp code handles circular lists much more robustly.
146 Many basic lisp functions used to loop forever when given a circular
147 list, expecting you to C-g (quit) out of the loop. Now this is more
148 likely to trigger a `circular-list' error. Printing a circular list
149 now results in something like this:
151 (let ((x (cons 'foo 'foo)))
154 => (foo ... <circular list>)
156 An extra bonus is that checking for circularities is not just
157 friendlier, but actually faster than checking for C-g.
159 ** The new form `ignore-file-errors', similar to `ignore-errors' may
160 be used as a short-hand for condition-case when you wish to ignore
161 file-related error. For example:
163 (ignore-file-errors (delete-file "foo"))
165 ** The arguments to `locate-file' are now much more "lispy". As
166 before, the usage is:
168 (locate-file FILENAME PATH-LIST &optional SUFFIXES MODE)
170 Except that SUFFIXES are now a list of strings instead of a single,
171 colon-separated string. MODE is now a symbol or a list of symbols
172 (symbols `exists', `executable', `writable', and `readable' are
173 supported) instead of an integer code. See the documentation for
176 Of course, the old form is still accepted for backward compatibility.
178 ** The `keywordp' function now returns non-nil only on symbols
179 interned in the global obarray. For example:
181 (keywordp (intern ":foo" [0]))
183 (keywordp (intern ":foo")) ; The same as (keywordp :foo)
186 This behaviour is compatible with other code which treats symbols
187 beginning with colon as keywords only if they are interned in the
188 global obarray. `keyword' used to wrongly return t in both cases
191 ** The first argument to `intern-soft' may now also be a symbol, like
192 with `unintern'. If given a symbol, `intern-soft' will look for that
193 exact symbol rather than for any string. This is useful when you want
194 to check whether a specific symbol is interned in an obarray, e.g.:
199 (intern-soft (make-symbol "foo"))
202 ** Functions for decoding base64 encoding are now available; see
203 `base64-encode-region', `base64-encode-string', `base64-decode-region'
204 and `base64-decode-string'.
207 * Changes in XEmacs 21.0
208 ========================
210 ** XEmacs has been unbundled into constituent installable packages.
211 See the Info documentation under "Packages" for more information.
212 See the file `etc/PACKAGES' in the distribution for a partial list of
213 packages available at the time of the 21.0 release.
215 ** XEmacs is now supported under Microsoft Windows 95/98 and Windows
216 NT operating systems. For starters, look at the XEmacs on Windows FAQ
217 at <URL:http://jagor.srce.hr/~hniksic/xemacs-on-windows-faq.txt>. To
218 discuss Windows-specific issues, subscribe to the mailing list at
219 <xemacs-nt-request@xemacs.org>.
221 ** XEmacs will now use `XEmacs' as its application class if it finds
222 any `XEmacs' resources in the resource database. Otherwise, it will
223 continue to use the `Emacs' class.
225 ** The options menu has been ported to Custom.
226 This means that each entry in the options menu acts as if you had customized
227 the corresponding variable by hand. ### WARNING: there is currently no
228 upgrading function to help you port your old options settings to the new
229 format. Consequently, if you want to modify the options for XEmacs 21, you
230 will have to set them all again through the menu, and remove the code loading
231 .xemacs-options from your .emacs.
233 ** When the Zmacs region is active, `M-x query-replace' and the other
234 replace commands now operate on the region contents only.
236 ** XEmacs now is able to choose X visuals and use private colormaps.
237 The '-visual <visualStr>' command line option or the '.EmacsVisual'
238 Xresource controls which visual XEmacs will use, and
239 '-privateColormap' or '.privateColormap' will force XEmacs to create a
240 private colormap for use. The syntax for the visual string is
241 "<visual><bitdepth>" where <visual> is one of 'StaticColor',
242 'TrueColor', 'GrayScale', 'PseudoColor' or 'DirectColor' and
243 <bitdepth> is the appropriate number of bits per pixel. If an invalid
244 or non-supported combination is entered, XEmacs attempts to find a happy
245 medium. The X creation mechanism will then determine if it needs to
246 create a colormap for use, or the presence of the private flags will
247 force it to create it.
249 ** The `imenu' package has been ported to XEmacs and is available as a
252 ** `echo-keystrokes' can now be a floating-point number, so that you
253 can set it to intervals shorter than one second.
255 (setq echo-keystrokes 0.1)
257 ** The new command `center-to-window-line' works like `recenter'
258 (bound to `C-l'), only it does not redisplay the whole display area.
260 ** The M-. command will now first search through exact tags matches,
261 and then through inexact matches, as one would expect.
263 ** The new variable `user-full-name' can be used to customize one's
264 name when using the Emacs mail and news reading facilities.
266 Normally, `user-full-name' is a function that returns the full name of
267 a user or UID, as specified by the system -- for instance,
268 (user-full-name "root") returns something like "Super-User". However,
269 when the function is called without arguments, it will return the
270 value of the `user-full-name' variable. The `user-full-name' variable
271 is initialized using the environment variable NAME and (failing that)
272 the user's system name.
274 The behavior of the `user-full-name' function with an argument
275 specified is unchanged.
277 ** The new command `M-x customize-changed-options' lets you customize
278 all the options whose default values have changed in recent Emacs
279 versions. You specify a previous Emacs version number as argument,
280 and the command creates a customization buffer showing all the
281 customizable options whose default values were changed since that
284 If you don't specify a particular version number argument, then the
285 customization buffer shows all the customizable options for which
286 Emacs versions of changes are recorded.
288 ** The new command `add-log-convert' can be used to convert the
289 old-style (pre-20.3) ChangeLog buffers to new style, for
290 consistency. A reminder: if you wish to revert to old-style
291 ChangeLogs instead, customize the value of `add-log-time-format'
294 ** The new command `zap-up-to-char' is now available. It is similar
295 to `zap-to-char', except that it does not delete the searched-for
296 character. It is not bound to a key by default.
298 ** You can now store a number into a register with `C-u NUMBER C-x r n'
299 REG, increment it by INC with `C-u INC C-x r + REG' (to increment by
300 one, omit C-u INC), and insert it in the buffer with `C-x r g REG'.
301 This is useful for writing keyboard macros.
303 ** The M-: command, when given a prefix argument, will now insert its
304 result to the current buffer.
306 ** The `C-h c' command, when given a prefix argument, will now insert
307 the message into the current buffer.
309 ** Horizontally split windows may now be dragged using the mouse.
310 Because of this, the dividers between vertical windows are always
311 visible. To turn it off, set `vertical-divider-always-visible-p' to
314 ** XEmacs/Mule (internationalization) changes.
316 *** Mule support now works on TTY's. Use `set-terminal-coding-system'
317 and `set-keyboard-coding-system' to specify the coding system of your
318 display and keyboard.
320 *** Egg/SJ3 input method is now officially supported. Quail and
321 Egg/Skk have been available through the generalized Leim since 20.3.
323 *** Localized Japanese menubars are available if XEmacs is built with
324 XFONTSET and either the X11 libraries are built with X_LOCALE defined
325 or the native C libraries support Japanese localization. This has
326 been available since 20.3, only it hasn't been announced before.
328 ** Jamie Zawinski's `gdb-highlight' extension is now distributed with
329 the `debug' package. gdb-highlight makes most objects printed in a
330 gdb buffer be mouse-sensitive: as text shows up in the buffer, it is
331 parsed, and objects which are recognized have context-sensitive
332 commands attached to them. To use it, add the following to `.emacs':
334 (add-hook 'gdb-mode-hook (lambda () (require 'gdb-highlight)))
336 ** The package popper.el is now included in the edit-utils package.
337 It has been greatly enhanced with respect to the one once included
338 with the ilisp package and should work well under XEmacs 21.0.
342 *** Like the old 'gnudoit' program. Gnuclient -batch now can read from stdin.
344 *** Gnuclient -batch no longer breaks off the output at the first LF.
348 *** Multiline macros are now handled, both as they affect indentation,
349 and as recognized syntax. New syntactic symbol cpp-macro-cont is
350 assigned to second and subsequent lines of a multiline macro
353 *** A new style "user" which captures all non-hook-ified
354 (i.e. top-level) .emacs file variable setings and customizations.
355 Style "cc-mode" is an alias for "user" and is deprecated. "gnu" style
356 is still the default however.
358 *** "java" style now conforms to Sun's JDK coding style.
360 *** There are new commands c-beginning-of-defun, c-end-of-defun which
361 are alternatives which you could bind to C-M-a and C-M-e if you prefer
362 them. They do not have key bindings by default.
364 *** New and improved implementations of M-a (c-beginning-of-statement)
365 and M-e (c-end-of-statement).
367 *** C++ namespace blocks are supported, with new syntactic symbols
368 namespace-open, namespace-close, and innamespace.
370 *** File local variable settings of c-file-style and c-file-offsets
371 makes the style variables local to that buffer only.
373 *** New indentation functions c-lineup-close-paren,
374 c-indent-one-line-block, c-lineup-dont-change.
376 *** Improvements (hopefully!) to the way CC Mode is loaded. You
377 should now be able to do a (require 'cc-mode) to get the entire
378 package loaded properly for customization in your .emacs file. A new
379 variable c-initialize-on-load controls this and is t by default.
381 ** In Text mode, now only blank lines separate paragraphs.
382 This makes it possible to get the full benefit of Adaptive Fill mode
383 in Text mode, and other modes derived from it (such as Mail mode).
384 TAB in Text mode now runs the command indent-relative; this makes a
385 practical difference only when you use indented paragraphs.
387 As a result, the old Indented Text mode is now identical to Text mode,
388 and is an alias for it.
390 If you want spaces at the beginning of a line to start a paragraph,
391 use the new mode, Paragraph Indent Text mode.
393 ** Changes to Gnus, the XEmacs newsreader.
395 *** New functionality for using Gnus as an offline newsreader has been
396 added. A plethora of new commands and modes have been added. See the
397 Gnus manual for the full story.
399 *** The nndraft backend has returned, but works differently than
400 before. All Message buffers are now also articles in the nndraft
401 group, which is created automatically.
403 *** `gnus-alter-header-function' can now be used to alter header
406 *** `gnus-summary-goto-article' now accept Message-ID's.
408 *** A new Message command for deleting text in the body of a message
409 outside the region: `C-c C-v'.
411 *** You can now post to component group in nnvirtual groups with
414 *** `nntp-rlogin-program' -- new variable to ease customization.
416 *** `C-u C-c C-c' in `gnus-article-edit-mode' will now inhibit
417 re-highlighting of the article buffer.
419 *** New element in `gnus-boring-article-headers' -- `long-to'.
421 *** `M-i' symbolic prefix command. See the section "Symbolic
422 Prefixes" in the Gnus manual for details.
424 *** `L' and `I' in the summary buffer now take the symbolic prefix
425 `a' to add the score rule to the "all.SCORE" file.
427 *** `gnus-simplify-subject-functions' variable to allow greater
428 control over simplification.
430 *** `A T' -- new command for fetching the current thread.
432 *** `/ T' -- new command for including the current thread in the
435 *** `M-RET' is a new Message command for breaking cited text.
437 *** \\1-expressions are now valid in `nnmail-split-methods'.
439 *** The `custom-face-lookup' function has been removed.
440 If you used this function in your initialization files, you must
441 rewrite them to use `face-spec-set' instead.
443 *** Cancelling now uses the current select method. Symbolic prefix
444 `a' forces normal posting method.
446 *** New command to translate M******** sm*rtq**t*s into proper text
449 *** For easier debugging of nntp, you can set `nntp-record-commands'
452 *** nntp now uses ~/.authinfo, a .netrc-like file, for controlling
453 where and how to send AUTHINFO to NNTP servers.
455 *** A command for editing group parameters from the summary buffer
458 *** A history of where mails have been split is available.
460 *** A new article date command has been added -- `article-date-iso8601'.
462 *** Subjects can be simplified when threading by setting
463 `gnus-score-thread-simplify'.
465 *** A new function for citing in Message has been added --
466 `message-cite-original-without-signature'.
468 *** `article-strip-all-blank-lines' -- new article command.
470 *** A new Message command to kill to the end of the article has
473 *** A minimum adaptive score can be specified by using the
474 `gnus-adaptive-word-minimum' variable.
476 *** The "lapsed date" article header can be kept continually
477 updated by the `gnus-start-date-timer' command.
479 *** Web listserv archives can be read with the nnlistserv backend.
481 *** Old dejanews archives can now be read by nnweb.
483 *** Byte-compilation of user-specs now works under XEmacs.
485 ** The `dir' files are no longer essential for functioning of the Info
486 subsystem. If the `dir' file does not exist in an Info directory, the
487 relevant information will be generated on-the-fly.
489 This behavior can be customized, look for `Info-auto-generate-directory'
490 and `Info-save-auto-generated-dir' in the `info' customization group.
493 * Lisp and internal changes in XEmacs 21.0
494 ==========================================
496 ** It is now possible to build XEmacs with support for 31-bit Lisp
497 integers (normally, Lisp integers are only 28 bits wide on 32-bit
498 machines.) Configure with --use-minimal-tagbits to test. With this
499 change, the maximum buffer size on 32-bit machines is increased from
500 128M to 1G. This setting will be made default in a future XEmacs
503 ** Specifier changes.
505 *** When instantiating a specifier, the window locale now has a higher
506 precedence than the buffer locale. This is because the window locale
507 is more specific than the buffer locale.
509 *** The new macro `let-specifier' can be used to temporarily add
510 specifications to specifiers. See the documentation for details.
512 *** The new specifiers `vertical-scrollbar-visible-p' and
513 `horizontal-scrollbar-visible-p' may be used to control scrollbar
514 visibility. Previously, the only way to remove a scrollbar was to set
515 its size to 0. This method is still supported for backward
518 *** The new specifiers `scrollbar-on-left-p' and `scrollbar-on-top-p'
519 may be used to control the position of the vertical and horizontal
520 toolbar. Previously, their position could be changed only through the
523 *** The new draggable vertical dividers between windows may be turned
524 off using the `vertical-divider-always-visible-p' specifier. When
525 this is set to nil, the vertical dividers between windows are shown
526 only when needed, and they are not draggable.
528 Other properties of the vertical dividers may be controlled using
529 `vertical-divider-shadow-thickness', `vertical-divider-line-width' and
530 `vertical-divider-spacing' specifiers, which see.
532 ** Frame focus management changes.
534 *** When the variable focus-follows-mouse is non-nil, `select-frame'
535 no longer permanently selects a different frame. The frame selection
536 is temporary and is reverted when the current command terminates, much
537 like the buffer selected by `set-buffer'. This is the same as in FSF
540 *** The new function `focus-frame' sets the window system focus to
541 FRAME (and selects it), regardless of the value of
542 `focus-follows-mouse'. Doing this is not well behaved, so be
543 absolutely sure that you want this.
545 The code that uses `select-frame' only to get the window manager focus
546 should be changed to use `set-frame-focus' instead, so that they keep
547 working when `focus-follows-mouse' is non-nil.
549 *** The special forms `save-selected-frame' and `with-selected-frame'
550 can now be used to temporarily change selected frame.
552 *** The behavior of `other-frame' command (`C-x 5 o') is unaffected by
555 ** The function `select-window' now has an optional second argument
556 NORECORD which if non-nil inhibits the recording of a buffer change.
558 ** The function `vertical-motion' now correctly handles the second,
559 optional WINDOW argument. A new third argument PIXELS, if non-nil,
560 indicates that the returned motion should be in pixels.
562 ** The new function `vertical-motion-pixels' is similar to
563 vertical-motion but takes as input a vertical motion in pixels.
565 ** The new functions window-text-area-pixel-{width,height,edges} can
566 be used to obtain information about the text-displaying area of a
569 ** The new functions `shrink-window-pixels' and `enlarge-window-pixels'
570 can be used to adjust the size of a window by a pixel amount.
572 ** The new function `window-displayed-text-pixel-height' can be used
573 to determine the height of the text actually displayed in a window.
575 ** The arithmetic comparison functions <, >, =, /= now accept a
576 variable number of arguments.
578 This means that if you want to test whether A < B < C, you can write
579 it as (< A B C) instead of (and (< A B) (< B C)). Likewise,
580 (apply #'> LIST) now tests if LIST is monotonously increasing -- and
583 ** The XEmacs hashtables now have a consistent read/print syntax.
584 This means that a hashtable will be readably printed in a
587 #s(hashtable size 2 data (key1 value1 key2 value2))
589 When XEmacs reads this form, it will create a new hashtable according
590 to description. This allows you to easily dump hashtables to files
591 using `prin1', and read them back in using `read'.
593 If `print-readably' is non-nil, a more relaxed syntax is used; for
596 #<hashtable size 2/13 data (key1 value1 key2 value2) 0x874d>
598 ** It is now possible to build XEmacs with LDAP support.
599 You will need to install a LDAP library first. The following have
601 - LDAP 3.3 from the University of Michigan
602 (get it from <URL:http://www.umich.edu/~dirsvcs/ldap/>)
603 - OpenLDAP 1.0.3 from the OpenLDAP Foundation
604 (get it from <URL:http://www.openldap.org/>)
605 - LDAP SDK 1.0 from Netscape Corp.
606 (get it from <URL:http://developer.netscape.com/>)
608 ** When profiling is in effect, a call-count of all recorded functions
609 is now calculated. This information is stored in
610 `call-count-profile-table', and is utilized by `profile-results' as
611 well as the new command `profile-call-count-results'.
613 ** It is now an error to change the value of a symbol whose name
614 starts with a colon, if it is interned in the standard obarray.
616 However, setting such a symbol to its proper value, which is that
617 symbol itself, is not an error. This is for the sake of programs that
618 support pre-19.12 XEmacs and pre-20 GNU Emacs by explicitly setting
619 these variables to themselves.
621 ** The `concat' function no longer accepts integer arguments.
623 ** The new function `string' concatenates all its argument characters
624 and returns the resulting string. This is consistent with other
625 functions, like `list', `vector', etc.
627 ** The function `temp-directory' is now available to return the
628 directory to store temporary files. On Unix this will be obtained
629 from TMPDIR, defaulting to `/tmp'.
631 ** The function load-average now accepts an optional argument
632 USE-FLOATS. If it is non-nil, the load average values are returned as
633 floating point numbers, rather than as integers to be divided by 100.
635 ** The `make-event' function now supports the TYPE and PLIST
636 arguments, which can be used to create various events from Lisp. See
637 the documentation for details.
639 ** `function-interactive' is a new function that returns the
640 interactive specification of a funcallable object.
642 ** The new `lmessage' function allows printing of a formatted message
643 with a particular label.
645 (lmessage 'progress "Processing... %d" counter)
647 This function is more convenient than `display-message' because it
648 automatically applies `format' to its arguments.
650 ** The new `lwarn' function, analogous to `lmessage', allows printing
651 a formatted warning, with a non-default CLASS or LABEL.
653 ** The new function `split-path' can now be used to explode the
654 components of a colon-separated search path into a list.
656 (split-path "foo:bar")
659 ** Specifiers and symbols whose value is a specifier are now allowed
660 as modeline specifications.
662 ** defcustom now accepts the keyword `:version'. Use this to specify
663 in which version of Emacs a certain variable's default value changed.
666 (defcustom foo-max 34 "*Maximum number of foo's allowed."
671 This information is used to control the customize-changed-options
674 ** The line number tracking in modeline is now efficient, even for
675 very large buffers. This is achieved by caching the line numbers of
676 recent buffer positions, and reusing them. This cache is used only in
677 the buffers where `line-number-mode' is in effect.
679 ** When the new GNU Malloc aka Doug Lea Malloc is available, it will
680 be used. This should result in better performance on Linux systems
683 ** The code XEmacs uses to assemble its various paths into the
684 directory hierarchy has been rewritten to support the package system.
685 Look under "Startup Paths" in the Info documentation for more
688 *** site-lisp is now longer part of the load-path by default.
689 Its use is deprecated, but you can specify --with-site-lisp=yes at the
690 configure command line to get it back.
692 *** `Info-default-directory-list' is now obsolete. If you want to
693 change the path which XEmacs uses to search for info files, set
694 `Info-directory-list' instead.