1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2013 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that all necessary updates to the manuals in doc/ are complete.
19 --- means no change in the manuals is needed.
20 When you add a new item, use the appropriate mark if you know it applies,
21 otherwise leave it unmarked.
24 * Installation Changes in Emacs 24.4
26 ** Emacs can be compiled with ACL support.
27 This happens by default if a suitable support library is found at
28 build time, like libacl on GNU/Linux. To prevent this, use the
29 configure option `--disable-acl'.
31 ** Emacs can be compiled with file notification support.
32 This happens by default if a suitable system library is found at
33 build time. To prevent this, use the configure option
34 `--with-file-notification-no'. See below for file-notify features.
35 FIXME? This feature is not available for the Nextstep port. (?)
37 ** The configure option --with-crt-dir has been removed.
38 It is no longer needed, as the crt*.o files are no longer linked
41 ** Directories passed to configure option `--enable-locallisppath' are
42 no longer created during installation.
44 ** Emacs can be compiled with zlib support. If this library is present
45 (which it normally is on most systems), the function
46 `zlib-decompress-region' becomes available, which can decompress gzip-
47 and zlib-format compressed data.
50 ** Emacs for NS (OSX, GNUStep) can be built with ImageMagick support.
51 pkg-config is required to find ImageMagick libraries.
54 * Startup Changes in Emacs 24.4
57 * Changes in Emacs 24.4
59 ** Key ? also describes prefix bindings like C-h.
62 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
63 because it affects caching of paragraph scanning results as well.
66 ** `apropos-variable' is now `apropos-user-option'
67 `apropos-user-option' shows all user options while `apropos-variable'
68 shows all variables. When called with a universal prefix argument,
69 the two commands swap their behaviors. When `apropos-do-all' is
70 non-nil, they output the same results.
73 ** `eval-defun' on an already defined defcustom calls the :set function,
76 ** If the new variable `enable-dir-local-variables' is nil,
77 directory local variables are ignored. May be useful for some modes
78 that want to ignore directory-locals while still respecting file-locals.
80 ** The option `set-mark-default-inactive' has been deleted.
81 This unfinished feature was introduced by accident in Emacs 23.1;
82 simply disabling Transient Mark mode does the same thing.
84 ** `initial-buffer-choice' can now specify a function to set up the
87 ** `remember-notes' creates a buffer whose content is saved on kill-emacs.
88 You may think of it as a *scratch* buffer whose content is preserved.
89 In fact, it was designed as a replacement for *scratch* buffer and can
90 be used that way by setting `initial-buffer-choice' to `remember-notes'
91 and `remember-notes-buffer-name' to "*scratch*". Without the second
92 change, *scratch* buffer will still be there for notes that do not
95 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
97 ** ACL support has been added.
99 *** Emacs preserves the ACL entries of files when backing up.
101 *** New functions `file-acl' and `set-file-acl' get and set the ACL
102 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
103 libacl. On MS-Windows, the NT Security APIs are used to emulate the
104 POSIX ACL interfaces.
106 ** New option `scroll-bar-adjust-thumb-portion'.
107 Available only on X, this option allows to control over-scrolling
108 using the scroll bar (i.e. dragging the thumb down even when the end
109 of the buffer is visible).
111 ** New function `add-face-text-property' has been added, which can be
112 used to conveniently prepend/append new face attributes to text.
114 ** In compiled Lisp files, the header no longer includes a timestamp.
116 ** Multi-monitor support has been added.
118 *** New functions `display-monitor-attributes-list' and
119 `frame-monitor-attributes' can be used to obtain information about
120 each physical monitor on multi-monitor setups.
122 *** The functions `display-pixel-width' and `display-pixel-height' now
123 behave consistently among the platforms: they return the pixel width
124 or height for all physical monitors associated with the given display
125 as just they were on X11. To get information for each physical
126 monitor, use the new functions above. Similar notes also apply to
127 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
128 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
130 ** New macro `alternatives-define' can be used to define generic commands.
131 Generic commands are interactive functions whose implementation can be
132 selected among several alternatives, as a matter of user preference.
134 ** The blink cursor stops blinking after 10 blinks (default) on X and NS.
135 You can change the default by customizing the variable blink-cursor-blinks.
136 Also timers for blinking are stopped when no blinking is done, so Emacs does
137 not consume CPU cycles.
139 ** New command `frameset-to-register' is now bound to `C-x r f', replacing
140 `frame-configuration-to-register'. It offers similar functionality, plus
141 some enhancements, like the ability to restore deleted frames. Command
142 `frame-configuration-to-register' is still available, but unbound.
145 * Editing Changes in Emacs 24.4
147 ** `split-window' is no longer a command, just a non-interactive function.
148 As a command it was a special case of `split-window-below', and as such
149 superfluous. After being reimplemented in Lisp, its interactive form
150 was mistakenly retained.
152 ** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
153 bound to <f11> and M-<f10>, respectively.
155 ** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
159 ** New option `visual-order-cursor-movement'.
160 If this is non-nil, cursor motion with arrow keys will follow the
161 visual order of characters on the screen: <left> always moves to the
162 left, <right> always moves to the right, disregarding the surrounding
163 bidirectional context.
165 ** New command `kmacro-to-register' to store keyboard macros in registers.
169 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
170 You can pick the name of the function and the variables with `C-x 4 a'.
173 * Changes in Specialized Modes and Packages in Emacs 24.4
175 ** The debugger's `e' command evaluates the code in the context at point.
176 This includes using the lexical environment at point, which means that
177 `e' now lets you access lexical variables as well.
179 ** `eshell' now supports visual subcommands and options
180 Eshell has been able to handle "visual" commands (interactive,
181 non-line oriented commands such as top that require display
182 capabilities not provided by eshell) by running them in an Emacs
183 terminal emulator. See `eshell-visual-commands'.
185 This feature has been extended to subcommands and options that make a
186 usually line-oriented command a visual command. Typical examples are
187 "git log" and "git <command> --help" which display their output in a
188 pager by default. See `eshell-visual-subcommands' and
189 `eshell-visual-options'.
191 ** If your Emacs is compiled with libxml2 support, you can use the new
192 built-in web browser `eww'.
194 ** `remember' can now store notes in separates files
195 You can use the new function `remember-store-in-files' within the
196 `remember-handler-functions' option.
198 See `remember-data-directory' and `remember-directory-file-name-format'
199 for new options related to this function.
201 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
203 ~/.emacs.d/timelog replaces ~/.timelog
204 ~/.emacs.d/vip replaces ~/.vip
205 ~/.emacs.d/viper replaces ~/.viper
206 ~/.emacs.d/ido.last replaces ~/.ido.last
207 ~/.emacs.d/kkcrc replaces ~/.kkcrc
208 ~/.emacs.d/quickurls replaces ~/.quickurls
209 ~/.emacs.d/idlwave replaces ~/.idlwave
210 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
211 ~/.emacs.d/places replaces ~/.emacs-places
212 ~/.emacs.d/shadows replaces ~/.shadows
213 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
214 ~/.emacs.d/strokes replaces ~/.strokes
215 ~/.emacs.d/notes replaces ~/.notes
216 ~/.emacs.d/type-break replaces ~/.type-break
217 Also the following files used by the now obsolete otodo-mode.el:
218 ~/.emacs.d/todo-do replaces ~/.todo-do
219 ~/.emacs.d/todo-done replaces ~/.todo-done
220 ~/.emacs.d/todo-top replaces ~/.todo-top
223 ** Delphi mode is now called OPascal mode.
224 *** All delphi-* variables and functions have been renamed to opascal-*.
225 *** `delphi-newline-always-indents' is not supported any more.
226 Use `electric-indent-mode' instead.
227 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
229 ** Eldoc Mode works properly in the minibuffer.
231 ** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
233 ** completing-read-multiple's separator can now be a regexp.
234 The default separator is changed to allow surrounding spaces around the comma.
238 *** Battery information via the BSD `apm' utility is now supported.
242 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
244 ** Calendar and Diary
246 *** New faces: `calendar-weekday-header', `calendar-weekend-header',
247 `calendar-month-header'.
249 *** New option `calendar-day-header-array'.
251 *** The variable `calendar-font-lock-keywords' is obsolete.
254 *** New variable `diary-from-outlook-function', used by the command
255 `diary-from-outlook'.
257 ** VC and related modes
259 *** In VC directory mode, `D' displays diffs between VC-controlled
260 whole tree revisions.
262 *** In VC directory mode, `L' lists the change log for the current VC
263 controlled tree in a window.
265 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a
266 file under current version control system.
270 *** New macro cl-tagbody.
273 *** letf is now just an alias for cl-letf.
277 *** Calc by default now uses the Gregorian calendar for all dates, and
278 uses January 1, 1 AD as its day number 1. Previously Calc used the
279 Julian calendar for dates before September 14, 1752, and it used
280 December 31, 1 BC as its day number 1; the new scheme is more
281 consistent with Calendar's calendrical system and day numbering.
283 *** The new variable `calc-gregorian-switch' lets you configure the
284 date when Calc switches from the Julian to the Gregorian calendar.
285 Nil, the default value, means to always use the Gregorian calendar.
286 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
289 *** Support for ISO 8601 dates.
293 *** `desktop-auto-save-timeout' defines the number of seconds between
294 auto-saves of the desktop.
296 *** `desktop-restore-frames', enabled by default, allows saving and
297 restoring the frame/window configuration (frameset). Additional options
298 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
299 and `desktop-restore-forces-onscreen' offer further customization.
303 *** New minor mode `dired-hide-details-mode' hides details.
307 *** New option `erc-accidental-paste-threshold-seconds'.
308 If set to a number, this can be used to avoid accidentally paste large
309 amounts of data into the ERC input.
313 *** New option `epa-mail-aliases'.
315 You can set this to a list of alias expansions for keys to use
316 in `epa-mail-encrypt'.
318 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
319 that means: when one of the recipients of the message being encrypted
320 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
322 If one element of the variable's value is ("foo@bar.com"),
323 that means: when one of the recipients of the message being encrypted
324 is `foo@bar.com', ignore that name as regards encryption.
325 This is useful to avoid a query when you have no key for that name.
328 ** New F90 mode option `f90-smart-end-names'.
330 ** Icomplete is a bit more like Ido.
331 *** key bindings to navigate through and select the completions.
332 *** The icomplete-separator is customizable, and its default has changed.
333 *** Removed icomplete-show-key-bindings.
336 *** Ido has a manual now.
337 *** `ido-use-virtual-buffers' takes a new value 'auto.
338 *** `ido-decorations' has been slightly extended to give a bit more control.
342 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
343 visit the next image file and the previous image file in the same
344 directory, respectively.
346 *** New commands to show specific frames of multi-frame images.
347 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
348 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
350 *** New commands to speed up, slow down, or reverse animation.
353 *** The command `image-mode-fit-frame' deletes other windows.
354 When toggling, it restores the frame's previous window configuration.
355 It also has an optional frame argument, which can be used by Lisp
356 callers to fit the image to a frame other than the selected frame.
360 *** New face `info-index-match' is used to highlight matches in index
361 entries displayed by `Info-index-next', `Info-virtual-index' and
366 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
367 will cycle through faces in `hi-lock-face-defaults' without prompting.
370 *** New global command `M-s h .' (`highlight-symbol-at-point')
371 highlights the symbol found near point without prompting,
372 using the next face automatically.
374 ** Search and Replace
376 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
377 starts a symbol (identifier) incremental search forward with the
378 symbol found near point added to the search string initially.
380 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
381 and adds it to the search string.
383 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
384 between nil and the value of the option `search-invisible' (or `open'
387 *** `query-replace' skips invisible text when `search-invisible' is nil,
388 and opens overlays with hidden text when `search-invisible' is `open'.
391 *** By default, prefix arguments do not now terminate Isearch mode.
392 Set `isearch-allow-prefix' to nil to restore old behavior.
394 *** More Isearch commands accept prefix arguments, namely
395 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
398 *** Word search now matches whitespace at the beginning/end
399 of the search string if it contains leading/trailing whitespace.
400 In an incremental word search or when using a non-nil LAX argument
401 of `word-search-regexp', the lax matching can also match part of
402 the first word (in addition to the lax matching of the last word).
403 The same rules are now applied to the symbol search with the difference
404 that it matches symbols, and non-symbol characters between symbols.
406 ** MH-E has been updated to MH-E version 8.5.
407 See MH-E-NEWS for details.
410 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
411 Customize `unrmail-mbox-format' to change this.
414 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
415 of how Rmail displays non-MIME messages.
418 ** New function `ses-rename-cell' to give SES cells arbitrary names.
420 ** trace-function was largely rewritten.
421 New features include:
422 - no prompting for the destination buffer, unless a prefix-arg was used.
423 - additionally to prompting for a destination buffer, when a prefix-arg is
424 used, the user can enter a "context", i.e. Lisp expression whose value at the
425 time the function is entered/exited will be printed along with the function
426 name and arguments. Useful to trace the value of (current-buffer) or
427 (point) when the function is invoked.
429 ** New command `delete-duplicate-lines' has new types of operation:
430 When its arg ADJACENT is non-nil (when called interactively with C-u C-u)
431 it works like the utility `uniq'. Otherwise by default it deletes
432 duplicate lines everywhere in the region without regard to adjacency.
433 When its arg KEEP-BLANKS is non-nil (when called interactively with
434 C-u C-u C-u), duplicate blank lines are preserved.
436 ** New `cycle-spacing' command allows cycling between having just one
437 space, no spaces, or reverting to the original spacing. Like
438 `just-one-space' command it can handle or ignore newlines and
439 leave different number of spaces.
441 ** Todo mode has been rewritten and enhanced.
442 New features include:
443 - support for multiple todo files and archive files of done items;
444 - renaming, reordering, moving, merging, and deleting categories;
445 - sortable tabular summaries of categories and the types of items they contain;
446 - cross-category lists of items filtered by specific criteria;
447 - more fine-grained interaction with the Emacs diary, by being able to decide
448 for each todo item whether it appears in the Fancy Diary display;
449 - highly flexible new item insertion and item editing;
450 - moving items between categories, storing done items in their category or in
451 archive files, undoing or unarchiving done items;
452 - reprioritizing items by inputting a numerical priority;
453 - extensive customizability of operation and display, including numerous faces.
454 The Todo mode user manual describes all commands and most user options.
455 To support some of these features, a new file format is used, which is
456 incompatible with the old format; however, you can convert old todo and done
457 item files to the new format on initializing the first new todo file, or at any
458 later time with the provided conversion command. The old version of
459 todo-mode.el has been made obsolete and renamed otodo-mode.el.
464 *** New connection method "adb", which allows to access Android
465 devices by the Android Debug Bridge. The variable `tramp-adb-program'
466 can be used to adapt the path of the "adb" program, if needed.
468 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
469 "scpc" and "rsyncc" are discontinued. The ssh option
470 "ControlMaster=auto" is set automatically in all ssh-based methods,
474 *** Handlers for `file-acl' and `set-file-acl' for remote machines
475 which support POSIX ACLs.
478 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
479 for remote machines which support filesystem notifications.
483 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
485 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
489 *** The commands `woman-default-faces' and `woman-monochrome-faces'
490 are obsolete. Customize the `woman-*' faces instead.
494 *** Added Eshell-Tramp module
495 External su and sudo commands are now the default; the internal,
496 Tramp-using variants can still be used by enabling the eshell-tramp
499 ** New term.el option `term-suppress-hard-newline'.
501 ** Obsolete packages:
503 *** longlines.el is obsolete; use visual-line-mode instead.
508 *** terminal.el is obsolete; use term.el instead.
510 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
515 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
518 *** The Info-edit command is obsolete. Editing Info nodes by hand
519 has not been relevant for some time.
523 *** `explicit-bash-args' now always defaults to use --noediting.
524 During initialization, Emacs no longer expends a process to decide
525 whether it is safe to use Bash's --noediting option. These days
526 --noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
529 * New Modes and Packages in Emacs 24.4
531 ** New `superword-mode' in subword.el
532 `superword-mode' overrides the default word motion commands to treat
533 symbol_words as a single word, similar to what `subword-mode' does and
534 using the same internal functions.
536 ** New nadvice.el package offering lighter-weight advice facilities.
538 - add-function/remove-function which can be used to add/remove code on any
539 function-carrying place, such as process-filters or `<foo>-function' hooks.
540 - advice-add/advice-remove to add/remove a piece of advice on a named function,
541 much like `defadvice' does.
543 ** New frameset.el package.
544 It provides a set of operations to save a frameset (the state of all
545 or a subset of the existing frames and windows, somewhat similar to a
546 frame configuration), both in-session and persistently, and restore it
547 at some point in the future.
550 ** The package filenotify.el provides an interface for file system
551 notifications. It requires, that Emacs is compiled with one of the
552 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
555 * Incompatible Lisp Changes in Emacs 24.4
557 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
559 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
560 Some languages match those as »...« and others as «...» so better stay neutral.
562 ** The default file coding for Emacs Lisp files is now utf-8.
563 (See file-coding-system-alist.) In most cases, this change is transparent, but
564 files that contain unusual characters without specifying an explicit coding
565 system may fail to load with obscure errors.
566 You should either convert them to utf-8 or add an explicit `coding:' cookie.
568 ** overriding-terminal-local-map does not replace the local keymaps any more.
569 It used to disable the minor mode, major mode, and text-property keymaps,
570 whereas now it simply has higher precedence.
572 ** Default process filters and sentinels are not nil any more.
573 Instead they default to a function which does what the nil value used to do.
575 ** `read-event' does not return decoded chars in ttys any more.
576 Just as was the case in Emacs-22 and before, decoding of tty input according to
577 keyboard-coding-system is not performed in read-event any more. But contrary
578 to that past, it is still done before input-decode-map/function-key-map/...
580 ** Removed inhibit-local-menu-bar-menus.
582 ** frame-local variables that affect redisplay do not work any more.
583 More specifically, the redisplay does not bother to check for a frame-local
584 value when looking up variables.
586 ** nil and "unbound" are indistinguishable in symbol-function.
587 `symbol-function' never signals `void-function' any more.
588 `fboundp' returns non-nil if the symbol was `fset' to nil.
590 ** `defadvice' does not honor the `freeze' flag and cannot advise
591 special-forms any more.
593 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
594 VAR was bound to nil which was not tremendously useful and just lead to
595 spurious warnings about an unused var.
597 ** The return value of `backup-buffer' has changed.
598 The second argument is no longer an SELinux context, instead it is an
599 alist of extended attributes as returned by the new function
600 `file-extended-attributes'. The attributes can be applied to another
601 file using `set-file-extended-attributes'.
603 ** `visited-file-modtime' now returns -1 for nonexistent files.
604 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
605 in the presence of files with negative time stamps.
607 * Lisp Changes in Emacs 24.4
610 ** New function `define-error'.
612 ** New hook `tty-setup-hook'.
615 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
617 ** Obsoleted functions:
620 *** `lisp-complete-symbol'
622 *** `minibuffer-completion-contents'
623 *** `isearch-nonincremental-exit-minibuffer'
624 *** `isearch-filter-visible'
625 *** `generic-make-keywords-list'
627 ** `with-wrapper-hook' is obsoleted by `add-function'.
628 The few hooks that used with-wrapper-hook are replaced as follows:
629 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
630 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
631 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
633 ** `split-string' now takes an optional argument TRIM.
634 The value, if non-nil, is a regexp that specifies what to trim from
635 the start and end of each substring.
637 ** `get-upcase-table' is obsoleted by the new `case-table-get-table'.
639 ** Support for filesystem notifications.
640 Emacs now supports notifications of filesystem changes, such as
641 creation, modification, and deletion of files. This requires the
642 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
643 MS-Windows systems, this is supported for Windows XP and newer
646 ** Changes in autorevert.el
649 *** If Emacs is compiled with file notification support, notifications
650 are used instead of checking the time stamp of the files. You can
651 disable this by setting the user option `auto-revert-use-notify' to
652 nil. Alternatively, a regular expression of directories to be
653 excluded from file notifications can be specified by
654 `auto-revert-notify-exclude-dir-regexp'.
657 *** The new user option `auto-revert-remote-files' enables reversion
658 of remote files when set to non-nil.
662 *** The function `face-spec-set' is now analogous to `setq' for face specs.
663 Its third arg now accepts values specifying exactly which face spec to
664 set (defface, custom, or user spec), and it directly sets the relevant
665 property using the supplied face spec.
667 *** Face specs set via Custom themes now replace the `defface' spec
668 rather than inheriting from it (as do face specs set via Customize).
670 *** New face characteristic (supports :underline (:style wave))
671 specifies whether or not the terminal can display a wavy line.
676 *** `image-animated-p' is now `image-multi-frame-p'.
677 It returns non-nil for any image that contains multiple frames,
678 whether or not it specifies a frame delay.
681 *** When animating images that do not specify a frame delay,
682 Emacs uses `image-default-frame-delay'.
685 *** New functions `image-current-frame' and `image-show-frame' for getting
686 and setting the current frame of a multi-frame image.
688 *** You can change the speed of animated images.
690 ** Changes in encoding and decoding of text
693 *** New coding-system `prefer-utf-8'.
694 This is like `undecided' but prefers UTF-8 on decoding if the text to
695 be decoded does not contain any invalid UTF-8 sequences. On encoding,
696 any non-ASCII characters are automatically encoded as UTF-8.
699 *** New attributes of coding-systems whose type is `undecided'.
700 Two new attributes, `:inhibit-null-byte-detection' and
701 `:inhibit-iso-escape-detection', determine how to detect encoding of
702 text that includes null bytes and ISO-2022 escape sequences,
703 respectively. Each of these attributes can be either nil, zero, or
704 t. If it is t, decoding text ignores null bytes and, respectively,
705 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
706 with no-conversion and ISO-2022 sequences cause Emacs to assume the
707 text is encoded in one of the ISO-2022 encodings, such as
708 iso-2022-7bit. If the value is zero, Emacs consults the variables
709 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
711 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
712 UTF-8 encoding and decoding, whenever possible.
714 These attributes are only meaningful for coding-systems of type
715 `undecided'. (The type of a coding-system is determined by its
716 `:coding-type' attribute and can be accessed by calling the
717 `coding-system-type' function.)
719 ** The function `set-visited-file-modtime' now accepts a 0 or -1 argument
720 with the same interpretation as the returned value of `visited-file-modtime'.
722 ** time-to-seconds is not obsolete any more.
723 ** New functions special-form-p and macrop.
724 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
725 text-property on the first char.
727 ** The `defalias-fset-function' property lets you catch calls to defalias
728 and redirect them to your own function instead of `fset'.
730 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
731 When you edit DIR/FILE, Emacs normally creates a symbolic link
732 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
733 is being edited. Formerly, if there was already a non-symlink file
734 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
735 through DIR/.#FILE.9. These fallbacks have been removed, so that
736 Emacs now no longer locks DIR/FILE in that case.
738 On file systems that do not support symbolic links, the lock is now a
739 regular file with contents being what would have been in the symlink.
741 ** The 9th element returned by `file-attributes' is now unspecified.
742 Formerly, it was t if the file's gid would change if file were deleted
743 and recreated. This value has been inaccurate for years on many
744 platforms, and nobody seems to have noticed or cared.
746 ** The function `file-ownership-preserved-p' now has an optional
747 argument GROUP which causes it check for file group too. This can be
748 used in place of the 9th element of `file-attributes'.
750 ** New functions `group-gid' and `group-real-gid'.
752 ** The 6th argument to `copy-file' has been renamed to
753 `preserve-extended-attributes' as it now handles both SELinux context
756 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
758 *** The package descriptor and name of global variables, constants,
759 and functions should be separated by two hyphens if the symbol is not
760 meant to be used by other packages.
763 * Changes in Emacs 24.4 on Non-Free Operating Systems
765 ** The procedure for building Emacs on MS-Windows has changed.
766 It is now built by running the same configure script as on all other
767 platforms. This requires the MSYS environment and MinGW development
768 tools. See the updated instructions in nt/INSTALL for details.
770 Using the Posix configure script and Makefile's also means a change in
771 the directory structure of the Emacs installation on Windows. It is
772 now the same as on GNU and Unix systems. In particular, the auxiliary
773 programs, such as cmdproxy.exe and hexl.exe, are in
774 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
775 version), version-independent site-lisp is in share/emacs/site-lisp,
776 version-specific Lisp files are in share/emacs/VERSION/lisp and in
777 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
778 files are in share/emacs/VERSION/etc. (Emacs knows about all these
779 directories and will find the files in there automatically; there's no
780 need to set any variables due to this change.)
783 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
784 The backtrace is written to the 'emacs_backtrace.txt' file in the
785 directory where Emacs was running.
788 ** The variable `buffer-file-type' is no longer supported.
789 Setting it has no effect, and %t in the mode-line format is ignored.
790 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
791 modifying it has no effect.
794 ** Lock files now work on MS-Windows.
795 This allows to avoid losing your edits if the same file is being
796 edited in another Emacs session or by another user. See the node
797 "Interlocking" in the Emacs User Manual for the details. To disable
798 file locking, customize `create-lockfiles' to nil.
800 ** Improved fullscreen support on Mac OS X.
801 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
802 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
803 native is the default.
806 * Installation Changes in Emacs 24.3
808 ** The default X toolkit is now Gtk+ version 3.
809 If you don't pass `--with-x-toolkit' to configure, or if you use
810 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
811 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
812 You can explicitly require a specific version by passing
813 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
815 ** New configure option `--enable-link-time-optimization', to utilize
816 an appropriate feature provided by GCC since version 4.5.0.
818 ** New configure option `--without-all' to disable most of the optional
819 features (image support, etc.) that are normally enabled by default.
821 ** New configure option `--enable-gcc-warnings' (for developing/debugging
822 Emacs). If building with GCC, this enables compile-time checks that
823 warn/give errors about possibly-questionable C code. On a recent GNU
824 system there should be no warnings; on older and on non-GNU systems
825 the results may be useful to developers.
827 ** The configure option `--enable-use-lisp-union-type' has been
828 renamed to `--enable-check-lisp-object-type', as the resulting
829 Lisp_Object type no longer uses a union to implement the compile time
830 check that this option enables.
832 ** The configure option `--disable-maintainer-mode' has been removed,
833 as it was confusingly-named and rarely useful.
835 ** The configure options `--program-prefix', `--program-suffix', and
836 `--program-transform-name' apply to more than just the installed
837 binaries. Now they also affect the man pages, icons, and the
838 etc/emacs.desktop file; but not the info pages, since this would break
839 links between the various manuals.
841 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
842 overwriting "emacs" in the installation bin/ directory with a link
845 ** Emacs uses libtinfo in preference to libncurses, if available.
847 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
848 /usr/pkg/lib to the linker search path. You must add them yourself if
851 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
852 (from the bin and libexec directories, respectively). The former is
853 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
856 * Startup Changes in Emacs 24.3
858 ** Emacs no longer searches for `leim-list.el' files beneath the standard
859 lisp/ directory. There should not be any there anyway. If you have
860 been adding them there, put them somewhere else; e.g., site-lisp.
862 ** The `--no-site-lisp' command line option now works for Nextstep builds.
865 * Changes in Emacs 24.3
869 *** `C-h f' (`describe-function') can now perform autoloading.
870 When this command is called for an autoloaded function whose docstring
871 contains a key substitution construct, that function's library is
872 automatically loaded, so that the documentation can be shown
873 correctly. To disable this, set `help-enable-auto-load' to nil.
875 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
876 even after their associated libraries have been loaded (and the
877 autoloads have been redefined as functions).
881 *** Images displayed via ImageMagick now support transparency and the
882 :background image specification property.
884 *** When available, ImageMagick support is automatically enabled.
885 It is no longer necessary to call `imagemagick-register-types'
886 explicitly to install ImageMagick image types; that function is called
887 automatically at startup, or when customizing an imagemagick- option.
889 *** Setting `imagemagick-types-inhibit' to t now disables the use of
890 ImageMagick to view images. (You must call `imagemagick-register-types'
891 afterwards if you do not use customize to change this.)
893 *** The new variable `imagemagick-enabled-types' also affects which
894 ImageMagick types are treated as images. The function
895 `imagemagick-filter-types' returns the list of types that will be
898 *** ImageMagick images now support the :max-width and :max-height
901 *** Some data types aren't auto-detected by ImageMagick. Adding
902 :format to `create-image' may help if the content type is in the
903 new variable `image-format-suffixes'.
907 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
908 next and previous path separator, respectively.
910 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
911 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
912 non-nil before enabling the mode.
916 *** New option `mode-line-default-help-echo' specifies the help text
917 (shown in a tooltip or in the echo area) for any part of the mode line
918 that does not have its own specialized help text.
920 *** You can now click mouse-3 in the coding system indicator to invoke
921 `set-buffer-file-coding-system'.
925 *** emacsclient now obeys string values for `initial-buffer-choice',
926 if it is told to open a new frame without specifying any file to visit
927 or expression to evaluate.
929 *** New option `server-auth-key' specifies a shared server key.
931 ** Emacs now generates backtraces on fatal errors.
932 On encountering a fatal error, Emacs now outputs a textual description
933 of the fatal signal, and a short backtrace on platforms like glibc
934 that support backtraces.
936 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
937 This minor mode replaces `toggle-read-only', which is now obsolete.
939 ** Most `y-or-n' prompts now allow you to scroll the selected window.
940 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
941 respectively, without exiting from the prompt.
943 ** In the Package Menu, newly-available packages are listed as "new",
944 and sorted above the other "available" packages by default.
946 ** If your Emacs was built from a bzr checkout, the new variable
947 `emacs-bzr-version' contains information about the bzr revision used.
949 ** New option `create-lockfiles' specifies usage of lockfiles.
950 It defaults to t. Changing it to nil inhibits the creation of lock
951 files (use this with caution).
953 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
954 variables on remote hosts.
956 ** The entry for PCL-CVS has been removed from the Tools menu.
957 The PCL-CVS commands are still available via the keyboard.
959 ** Using "unibyte: t" in Lisp source files is obsolete.
960 Use "coding: raw-text" instead.
962 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
963 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
964 The previous binding, introduced in Emacs 24.1, was a mistake, because
965 `C-c LETTER' bindings are reserved for user customizations.
967 ** Internationalization
969 *** New language environment: Persian.
971 *** New input method `vietnamese-vni'.
973 ** Nextstep (GNUstep / Mac OS X) port
975 *** Support for fullscreen and the frame parameter fullscreen.
977 *** A file dialog is used for open/save operations initiated from the
981 * Editing Changes in Emacs 24.3
983 ** Search and Replace
985 *** Non-regexp Isearch now performs "lax" space matching.
986 Each sequence of spaces in the supplied search string may match any
987 sequence of one or more whitespace characters, as specified by the
988 variable `search-whitespace-regexp'. (This variable is also used by a
989 similar existing feature for regexp Isearch.)
991 *** New Isearch command `M-s SPC' toggles lax space matching.
992 This applies to both ordinary and regexp Isearch.
994 *** New option `replace-lax-whitespace'.
995 If non-nil, `query-replace' uses flexible whitespace matching too.
998 *** Global `M-s _' starts a symbol (identifier) incremental search,
999 and `M-s _' in Isearch toggles symbol search mode.
1000 `M-s c' in Isearch toggles search case-sensitivity.
1002 ** Navigation commands
1004 *** New binding `M-g c' for `goto-char'.
1006 *** New binding `M-g TAB' for `move-to-column'.
1008 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1009 interactively with no prefix arg. Previously, it moved to column 1.
1011 ** New option `yank-handled-properties' allows processing of text
1012 properties on yanked text, in ways that are more general than just
1013 removing them (as is done by `yank-excluded-properties').
1015 ** New option `delete-trailing-lines' specifies whether
1016 M-x delete-trailing-whitespace should delete trailing lines at the end
1017 of the buffer. It defaults to t.
1019 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1021 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1022 `ucs-insert' is now an obsolete alias for `insert-char'.
1024 ** The `z' key no longer has a binding in most special modes.
1025 It used to be bound to `kill-this-buffer', but `z' is too easy to
1028 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1029 It copies the region-rectangle as the last rectangle kill.
1033 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1035 *** New option `register-separator' specifies the register containing
1036 the text to put between collected texts for use with
1037 M-x append-to-register and M-x prepend-to-register.
1040 * Changes in Specialized Modes and Packages in Emacs 24.3
1042 ** Common Lisp emulation (CL)
1044 *** CL's main entry is now (require 'cl-lib).
1045 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1046 i.e., all its definitions have the "cl-" prefix (and internal definitions
1047 use the "cl--" prefix).
1049 If `cl' provided a feature under the name `foo', then `cl-lib'
1050 provides it under the name `cl-foo' instead; with the exceptions of the
1051 few `cl' definitions that had to use `foo*' to avoid conflicts with
1052 pre-existing Elisp entities. These have been renamed to `cl-foo'
1053 rather than `cl-foo*'.
1055 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1056 provide the old, non-prefixed names. Some exceptions are listed below:
1058 *** `cl-flet' is not like `flet' (which is deprecated).
1059 Instead it obeys the behavior of Common-Lisp's `flet'.
1060 In particular, in cl-flet function definitions are lexically scoped,
1061 whereas in flet the scoping is dynamic.
1063 *** `cl-labels' is slightly different from `labels'.
1064 The difference is that it relies on the `lexical-binding' machinery
1065 (as opposed to the `lexical-let' machinery used previously) to capture
1066 definitions in closures, so such closures will only work if `lexical-binding'
1069 *** `cl-letf' is not exactly like `letf'.
1070 The only difference is in details that relate to some deprecated usage
1071 of `symbol-function' in place forms.
1073 *** `progv' was rewritten to use the `let' machinery.
1074 A side effect is that variables without corresponding values are bound
1075 to nil rather than being made unbound.
1077 *** The following methods of extending `setf' are obsolete
1078 (use features from gv.el instead):
1079 `define-modify-macro' (use `gv-letplace')
1080 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1081 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1082 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1086 *** Changes are now highlighted using the same color scheme as in
1087 modern VCSes. Deletions are displayed in red (new faces
1088 `diff-refine-removed' and `smerge-refined-removed', and new definition
1089 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1090 and `smerge-refined-added', and new definition of `diff-added').
1092 *** The variable `diff-use-changed-face' defines whether to use the
1093 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1094 changes in context diffs.
1096 *** The new command `diff-delete-trailing-whitespace' removes trailing
1097 whitespace introduced by a diff.
1099 ** Ediff now uses the same color scheme as Diff mode.
1103 A new version of python.el, which provides several new features, including:
1104 per-buffer shells, better indentation, Python 3 support, and improved
1105 shell-interaction compatible with iPython (and virtually any other
1108 *** Some user options have been replaced/renamed, including (old -> new):
1109 **** python-indent -> python-indent-offset
1110 **** python-guess-indent -> python-indent-guess-indent-offset
1111 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1112 **** python-use-skeletons -> python-skeleton-autoinsert
1114 *** Some user options have been removed, including:
1116 **** `python-indent-string-contents': Strings are never indented.
1118 **** `python-honour-comment-indentation':
1119 Comments are always considered as indentation markers.
1121 **** `python-continuation-offset': Indentation is automatically
1122 calculated in a pep8 compliant way depending on the context.
1124 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1125 Have no direct mapping as the shell interaction is completely different.
1127 **** `python-python-command', `python-jython-command':
1128 Replaced by `python-shell-interpreter'.
1130 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1131 `python-pdbtrack-minor-mode-string', `python-source-modes':
1134 *** Some commands have been replaced (old -> new):
1135 **** python-insert-class -> python-skeleton-class
1136 **** python-insert-def -> python-skeleton-def
1137 **** python-insert-for -> python-skeleton-for
1138 **** python-insert-if -> python-skeleton-if
1139 **** python-insert-try/except -> python-skeleton-try
1140 **** python-insert-try/finally -> python-skeleton-try
1141 **** python-insert-while -> python-skeleton-while
1142 **** python-find-function -> python-nav-jump-to-defun
1143 **** python-next-statement -> python-nav-forward-sentence
1144 **** python-previous-statement -> python-nav-backward-sentence
1145 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1146 **** python-end-of-defun-function -> python-nav-end-of-defun
1147 **** python-send-buffer -> python-shell-send-buffer
1148 **** python-send-defun -> python-shell-send-defun
1149 **** python-send-region -> python-shell-send-region
1150 **** python-send-region-and-go -> emulate with python-shell-send-region
1151 and python-shell-switch-to-shell
1152 **** python-send-string -> python-shell-send-string
1153 **** python-switch-to-python -> python-shell-switch-to-shell
1154 **** python-describe-symbol -> python-eldoc-at-point
1158 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1160 *** The D-Bus object manager interface is implemented.
1162 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1163 if their value does not fit into Emacs's integer range.
1165 *** The function `dbus-call-method' is now non-blocking.
1166 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1168 *** Signals can also be sent as unicast messages.
1170 *** The argument list of `dbus-register-signal' has been extended,
1171 according to the new match rule types of D-Bus.
1173 *** `dbus-init-bus' supports private connections.
1175 *** There is a new function `dbus-setenv'.
1177 ** `desktop-path' no longer includes the "." directory.
1178 Desktop files are now located in ~/.emacs.d by default.
1182 *** `dired-do-async-shell-command' executes each file sequentially
1183 if the command ends in `;' (when operating on multiple files).
1184 Otherwise, it executes the command on each file in parallel.
1186 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1187 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1190 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1191 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1192 mark/unmark/flag all files in the active region.
1194 *** The minibuffer default for `=' (`dired-diff') has changed.
1195 It is now the backup file for the file at point, if one exists.
1196 In Transient Mark mode the default is the file at the active mark.
1198 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1199 The global binding for `M-=', `count-words-region' is in effect.
1203 *** New module "notifications", which can send a notification when you
1204 receive a private message or your nickname is mentioned.
1206 *** ERC will look up server/channel names via auth-source and use any
1209 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1210 only applies to messages sent by lurkers.
1212 ** reStructuredText mode
1214 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1215 fontification, comment handling, and customization have all been revised
1218 *** Support for `imenu' and `which-function-mode'.
1220 *** The reStructuredText syntax is more closely covered.
1221 Sphinx support has been improved.
1223 *** `rst-insert-list' inserts new list or continues existing lists.
1225 *** A negative prefix argument always works for `rst-adjust'.
1227 *** The window configuration is reset after displaying a TOC.
1229 *** The constant `rst-version' describes the rst.el package version.
1233 *** Support for percent literals and recognition of regular expressions
1234 in method calls without parentheses with more methods, including Cucumber
1237 *** Improved syntax highlighting and indentation.
1239 *** New command `ruby-toggle-block', bound to `C-c {'.
1241 *** Some non-standard keybindings/commands have been removed:
1243 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1245 **** `ruby-mark-defun'; use `mark-defun'.
1247 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1248 appropriate settings for the variables `beginning-of-defun-function'
1249 and `end-of-defun-function'.
1251 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1252 `reindent-then-newline-and-indent' and `newline' have been removed.
1254 ** Shell Script mode
1256 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1258 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1260 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1264 *** The free software compiler GHDL is supported (and now the default).
1266 *** Support for the VHDL-AMS packages has been added/updated.
1268 *** Updated to the 2002 revision of the VHDL standard.
1270 *** Accepts \r and \f as whitespace.
1274 *** The faces used by Apropos are now directly customizable.
1275 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1276 see the `apropos' Custom group for details.
1278 *** The old options whose values specified faces to use have been removed
1279 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1283 *** This package has been rewritten to use Tabulated List mode.
1285 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1286 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1290 *** Algebraic simplification mode is now the default.
1291 To restrict to the limited simplifications given by the former
1292 default simplification mode, use `m I'.
1296 *** You can customize the header text that appears above each calendar month.
1297 See the variable `calendar-month-header'.
1299 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1301 *** The calendars produced by cal-html include holidays.
1302 Customize `cal-html-holidays' to change this.
1306 *** The major modes from the parser generators "Bovine" and "Wisent"
1307 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1308 are in `auto-mode-alist', and the corresponding manuals are included.
1312 **** Menu support for the "Configuration" feature. This allows users to
1313 choose the active configuration (such as debug or install) from the menu.
1315 **** New command `ede-set' to interactively set project-local variables.
1317 **** Support for compiling, debugging, and running in "generic" projects.
1319 **** Autoconf editing support for M4 macros with complex arguments.
1321 **** Compilation support for the "linux" project type.
1323 **** "simple" projects have been removed; use "generic" projects instead.
1327 **** Support for parsing #include statements inside a namespace in C/C++.
1329 **** Improved support for 'extern "C"' declarations in C/C++.
1331 **** The ability to ignore more common special C/C++ preprocessor symbols,
1332 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1333 If available, include cdefs.h as an additional source of preprocessor symbols.
1335 **** Improved C/C++ function pointer parsing.
1337 **** In Python, support for converting imports to include file names.
1339 **** Ability to dynamically determine the Python load path.
1341 **** Support for the Python 'WITH' and 'AT' keywords.
1343 **** Improved tooltip completion.
1347 **** The SRecode manual is now included.
1349 **** Tag generation supports constructor/destructor settings and system
1350 include differentiation.
1352 **** Addition of 'Framework' support: Frameworks are specified when a
1353 particular kind of library (such as Android) is needed in a common language
1356 **** Support for nested templates and let variables override based on priority.
1358 **** Support for merging tables from multiple related modes, such as
1359 default -> c++ -> arduino.
1361 ** Compile has a new option `compilation-always-kill'.
1365 *** `custom-reset-button-menu' now defaults to t.
1367 *** Non-option variables are never matched in `customize-apropos' and
1368 `customize-apropos-options' (i.e., the prefix argument does nothing for
1369 these commands now).
1373 *** The variables `term-default-fg-color' and `term-default-bg-color'
1374 are now deprecated in favor of the customizable face `term'.
1376 *** You can customize how to display ANSI terminal colors and styles
1377 by customizing the corresponding `term-color-<COLOR>',
1378 `term-color-underline' and `term-color-bold' faces.
1382 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1384 *** Remote processes are now also supported on remote MS-Windows hosts.
1388 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1389 Previously, this slot stored semicolon-separated attribute-value pairs
1390 appended to some imap URLs, but this is not compatible with RFC 3986.
1391 So now the `filename' slot stores the entire path and query components,
1392 and the `attributes' slot is always nil.
1394 *** New function `url-encode-url' for encoding a URI string.
1395 The `url-retrieve' function now uses this to encode its URL argument,
1396 in case that is not properly encoded.
1398 *** New command `url-cookie-list' displays all the current cookies, and
1399 allows deleting selected cookies.
1401 ** notifications.el supports now version 1.2 of the Notifications API.
1402 The function `notifications-get-capabilities' returns the supported
1405 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1406 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1407 `flymake-warning-bitmap'.
1409 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1410 specifying URL types that should be converted to remote file names at
1411 the FFAP prompt. The default is now '("ftp").
1413 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1414 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1416 ** New option `mouse-avoidance-banish-position' specifies where the
1417 `banish' mouse avoidance setting moves the mouse.
1419 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1420 closing brackets to be aligned with the line of the opening bracket.
1422 ** In Proced mode, new command `proced-renice' renices marked processes.
1424 ** New option `async-shell-command-buffer' specifies the buffer to use
1425 for a new asynchronous `shell-command' when the default output buffer
1426 `*Async Shell Command*' is already in use.
1428 ** SQL mode has a new option `sql-db2-escape-newlines'.
1429 If non-nil, newlines sent to the command interpreter will be escaped
1430 by a backslash. The default does not escape the newlines and assumes
1431 that the sql statement will be terminated by a semicolon.
1433 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1434 (and modes that derive from it), sorts the column at point, or the Nth
1435 column if a numeric prefix argument is given.
1437 ** `which-func-modes' now defaults to t, so Which Function mode, when
1438 enabled, applies to all applicable major modes.
1440 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1443 ** Follow mode no longer works by using advice.
1444 The option `follow-intercept-processes' has been removed.
1446 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1448 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1449 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1450 *** semantic-change-hooks -> semantic-change-functions
1451 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1452 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1453 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1454 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1455 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1456 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1457 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1458 *** rcirc-activity-hooks -> rcirc-activity-functions
1459 *** rcirc-print-hooks -> rcirc-print-functions
1460 *** dbus-event-error-hooks -> dbus-event-error-functions
1461 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1462 *** checkdoc-style-hooks -> checkdoc-style-functions
1463 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1464 *** archive-extract-hooks -> archive-extract-hook
1465 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1466 *** hfy-post-html-hooks -> hfy-post-html-hook
1467 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1468 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1469 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1470 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1472 ** Obsolete packages
1475 In most cases, assoc+member+push+delq work just as well.
1476 And in any case it's just a terrible package: ugly semantics, terrible
1477 inefficiency, and not namespace-clean.
1486 * Incompatible Lisp Changes in Emacs 24.3
1488 ** Docstrings starting with `*' no longer indicate user options.
1489 Only variables defined using `defcustom' are considered user options.
1490 The function `user-variable-p' is now an obsolete alias for
1491 `custom-variable-p'.
1493 ** The return values of `defalias', `defun' and `defmacro' have changed,
1494 and are now undefined. For backwards compatibility, `defun' and
1495 `defmacro' currently return the name of the newly defined
1496 function/macro, but this should not be relied upon.
1498 ** `random' by default now returns a different random sequence in
1499 every Emacs run. Use `(random S)', where S is a string, to set the
1500 random seed to a value based on S, in order to get a repeatable
1501 sequence in later calls.
1503 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1504 that substring is inserted literally even if the LITERAL arg is
1505 non-nil, instead of causing an error to be signaled.
1507 ** `select-window' now always makes the window's buffer current.
1508 It does so even if the window was selected before.
1510 ** The function `x-select-font' can return a font spec, instead of a
1511 font name as a string. Whether it returns a font spec or a font name
1512 depends on the graphical library.
1514 ** `face-spec-set' no longer sets frame-specific attributes when the
1515 third argument is a frame (that usage was obsolete since Emacs 22.2).
1517 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1519 ** The CL package's `get-setf-method' function no longer exists.
1520 Generalized variables are now part of core Emacs Lisp, and implemented
1521 differently to the way cl.el used to do it. It is not possible to
1522 define a compatible replacement for `get-setf-method'. See the file
1523 gv.el for internal details of the new implementation.
1525 ** The arguments of `dbus-register-signal' are no longer just strings,
1526 but keywords or keyword-string pairs. The old argument list will
1527 still be supported for Emacs 24.x.
1529 ** Miscellaneous name changes
1530 Some Lisp symbols have been renamed to correct their spelling,
1531 or to be more consistent with standard Emacs terminology.
1533 *** Renamed functions
1534 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1535 **** inactivate-input-method -> deactivate-input-method
1536 **** quail-inactivate -> quail-deactivate
1537 **** robin-inactivate -> robin-deactivate
1538 **** viper-inactivate-input-method -> viper-deactivate-input-method
1539 **** viper-inactivate-input-method-action ->
1540 viper-deactivate-input-method-action
1541 **** ucs-input-inactivate -> ucs-input-deactivate
1544 The old hooks are still supported for backward compatibility, but they
1545 are deprecated and will be removed eventually.
1546 **** input-method-inactivate-hook -> input-method-deactivate-hook
1547 **** robin-inactivate-hook -> robin-deactivate-hook
1548 **** quail-inactivate-hook -> quail-deactivate-hook
1550 *** Renamed variables
1551 **** follow-deactive-menu -> follow-inactive-menu
1552 **** inactivate-current-input-method-function ->
1553 deactivate-current-input-method-function
1555 ** Some obsolete functions, variables, and faces have been removed:
1556 *** `last-input-char', `last-command-char', `unread-command-char'
1557 *** `facemenu-unlisted-faces'
1558 *** `rmail-decode-mime-charset'
1559 *** `iswitchb-read-buffer'
1560 *** `sc-version', `sc-submit-bug-report'
1561 *** `set-char-table-default'
1562 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1563 *** `compile-internal'
1565 *** `mode-line-inverse-video'
1566 *** `follow-mode-off-hook'
1567 *** `cvs-commit-buffer-require-final-newline'
1568 (use `log-edit-require-final-newline' instead)
1569 *** `cvs-changelog-full-paragraphs'
1570 (use `log-edit-changelog-full-paragraphs' instead)
1571 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1572 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1573 *** `vc-master-templates' (use `vc-handled-backends' instead)
1574 *** `vc-checkout-carefully'
1577 * Lisp Changes in Emacs 24.3
1579 ** CL-style generalized variables are now in core Elisp.
1580 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1581 You can define your own generalized variables using `gv-define-simple-setter',
1582 `gv-define-setter', etc.
1584 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1585 This can significantly speed up execution of non-byte-compiled code,
1586 but can also bump into previously unnoticed cyclic dependencies.
1587 These are generally harmless: they will simply cause the macro calls
1588 to be left for later expansion (as before), but will result in a
1589 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1590 You may wish to restructure your code so this does not happen.
1592 ** New sampling-based Elisp profiler.
1593 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1594 When finished, use M-x profiler-stop. The sampling rate can be based on
1595 CPU time or memory allocations.
1597 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1598 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1600 ** New macros `setq-local' and `defvar-local'.
1602 ** Face underlining can now use a wave.
1604 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1605 of `read-regexp' accepts a string ending with a colon and space, and its
1606 second argument DEFAULTS can be a list of strings accessible via `M-n'
1607 in the minibuffer ahead of other hard-coded useful regexp-related values.
1608 More commands use `read-regexp' now to read their regexp arguments.
1612 *** New function `completion-table-with-quoting' to handle completion
1613 in the presence of quoting, such as file completion in shell buffers.
1615 *** New function `completion-table-subvert' to use an existing completion
1616 table, but with a different prefix.
1620 *** New error type and new function `user-error'.
1621 These do not trigger the debugger.
1623 *** New option `debugger-bury-or-kill', saying what to do with the
1624 debugger buffer when exiting debug.
1626 *** Set `debug-on-message' to enter the debugger when a certain
1627 message is displayed in the echo area. This can be useful when trying
1628 to work out which code is doing something.
1630 *** New var `inhibit-debugger', automatically set to prevent accidental
1631 recursive invocations.
1635 *** New command `fit-frame-to-buffer' adjusts the frame height to
1638 *** The command `fit-window-to-buffer' can adjust the frame height
1639 if the new option `fit-frame-to-buffer' is non-nil.
1641 *** New macro `with-temp-buffer-window', similar to
1642 `with-output-to-temp-buffer'.
1644 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1647 *** New option `switch-to-buffer-preserve-window-point' to restore a
1648 window's point when switching buffers.
1650 *** New display action alist entries `window-height' and `window-width'
1651 specify the size of new windows created by `display-buffer'.
1653 *** New display action alist entry `pop-up-frame-parameters', if
1654 non-nil, specifies frame parameters to give any newly-created frame.
1656 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1657 tells display action functions to avoid changing which frame is
1660 *** New display action alist entry `previous-window', if non-nil,
1661 specifies window to reuse in `display-buffer-in-previous-window'.
1663 *** New display action functions `display-buffer-below-selected',
1664 and `display-buffer-in-previous-window'.
1666 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1667 now accept a third argument to avoid choosing the selected window.
1669 *** Additional values recognized for option `window-combination-limit'.
1671 *** The following variables are obsolete, as they can be replaced by
1672 appropriate entries in the `display-buffer-alist' function introduced
1674 **** `dired-shrink-to-fit'
1675 **** `display-buffer-reuse-frames'
1676 **** `display-buffer-function'
1677 **** `special-display-buffer-names'
1678 **** `special-display-frame-alist'
1679 **** `special-display-function'
1680 **** `special-display-regexps'
1684 *** `current-time-string' no longer requires that its argument's year
1685 must be in the range 1000..9999. It now works with any year supported
1686 by the underlying C implementation.
1688 *** `current-time' now returns extended-format time stamps
1689 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1690 PSEC is typically a multiple of 1000 on current machines. Other
1691 functions that use this format, such as `file-attributes' and
1692 `format-time-string', have been changed accordingly. Old-format time
1693 stamps are still accepted.
1695 *** The format of timers in `timer-list' and `timer-idle-list' is now
1696 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1697 The PSECS slot is new, and uses picosecond resolution. It can be
1698 accessed via the new `timer--psecs' accessor.
1700 *** Last-modified time stamps in undo lists now are of the form
1701 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1705 *** Improved security when handling persistent objects:
1707 **** `eieio-persistent-read' now features optional arguments for specifying
1708 the class to load, as well as a flag stating whether subclasses are allowed;
1709 if provided, other classes will be rejected by the reader. For
1710 compatibility with existing code, if the class is omitted only a
1713 **** New specialized reader for pulling in classes and signaling errors
1714 without evaluation of suspicious code.
1716 **** All slots that contain objects must have a :type. Slots with lists
1717 of objects must use a new type predicate for a list of an object type.
1719 *** Support for `find-function' and similar utilities, through the addition
1720 of filename support to generated symbols.
1722 ** Floating point functions now always return special values like NaN,
1723 instead of signaling errors, if given invalid args; e.g., (log -1.0).
1724 Previously, they returned NaNs on some platforms but signaled errors
1725 on others. The affected functions are acos, asin, tan, exp, expt,
1726 log, log10, sqrt, and mod.
1728 ** New fringe bitmap `exclamation-mark'.
1730 ** Miscellaneous changes to special forms and macros
1732 *** `defun' and `defmacro' are now macros rather than special forms.
1734 *** `kbd' is now a function rather than a macro.
1736 ** Miscellaneous new functions
1738 *** `set-temporary-overlay-map' sets up a temporary keymap that
1739 takes precedence over most other maps for a short while (normally one key).
1741 *** `autoloadp' tests if its argument is an autoloaded object.
1743 *** `autoload-do-load' performs the autoloading operation.
1745 *** `buffer-narrowed-p' tests if the buffer is narrowed.
1747 *** `file-name-base' returns a file name sans directory and extension.
1749 *** `function-get' fetches a function property, following aliases.
1751 *** `posnp' tests if an object is a `posn'.
1753 *** `system-users' returns the user names on the system.
1755 *** `system-groups' returns the group names on the system.
1757 *** `tty-top-frame' returns the topmost frame of a text terminal.
1759 ** The following functions and variables are obsolete:
1760 *** `automount-dir-prefix' (use `directory-abbrev-alist')
1761 *** `buffer-has-markers-at'
1762 *** `macro-declaration-function' (use `macro-declarations-alist')
1763 *** `window-system-version' (provides no useful information)
1764 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
1765 *** `query-replace-interactive'
1766 *** `font-list-limit' (has had no effect since Emacs < 23)
1769 * Changes in Emacs 24.3 on Non-Free Operating Systems
1771 ** Cygwin builds can use the native MS Windows user interface.
1772 Pass `--with-w32' to configure. The default remains the X11 interface.
1774 ** Two new functions are available in Cygwin builds:
1775 `cygwin-convert-file-name-from-windows' and
1776 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
1777 code to access the Cygwin file-name mapping machinery to convert
1778 between Cygwin and Windows-native file and directory names.
1780 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
1781 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
1782 `mouse-autoselect-window'.
1784 ** On MS Windows Vista and later Emacs now supports symbolic links.
1786 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
1787 support for libxml2, even if its presence is detected.
1789 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1791 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
1792 directories to the search path. You must add them yourself if you want them.
1795 * Changes in Emacs 24.2
1797 ** This is mainly a bug-fix release.
1800 * Installation Changes in Emacs 24.1
1802 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1803 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1804 also depend on Gtk+. You can disable them with --without-rsvg and
1807 ** Emacs can be compiled with GnuTLS support.
1808 This happens by default if a suitably recent version of the library is
1809 found at build time. To prevent this, use the configure option
1810 `--without-gnutls'. See below for GnuTLS features.
1812 ** Emacs can be compiled with SELinux support.
1813 This happens by default if a suitably recent version of the library is
1814 found at build time. To prevent this, use the configure option
1815 `--without-selinux'. See below for SELinux features.
1817 ** Emacs can be compiled with ImageMagick support.
1818 This happens by default if a suitably recent version of the library is
1819 found at build time. To prevent this, use the configure option
1820 `--without-imagemagick'. See below for ImageMagick features.
1821 This feature is not available for the Nextstep or MS ports.
1823 ** Emacs can be compiled with libxml2 support.
1824 This happens by default if a suitably recent version of the library is
1825 found at build time. To prevent this, use the configure option
1826 `--without-xml2'. See below for libxml2 features.
1828 ** By default, the installed Info and man pages are compressed.
1829 You can disable this by configuring --without-compress-info.
1831 ** New configure option --with-wide-int.
1832 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
1833 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1836 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
1837 These provide no new functionality, they just remove the need to edit
1838 lib-src/Makefile by hand in order to use the associated features.
1840 ** New configure option --enable-use-lisp-union-type.
1841 This is only useful for Emacs developers to debug certain types of bugs.
1842 This is not a new feature; only the configure flag is new.
1844 ** The standalone programs digest-doc and sorted-doc are removed.
1845 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1847 ** The standalone program `fakemail' is removed.
1848 If you need it, feedmail.el provides a superset of the functionality.
1851 * Startup Changes in Emacs 24.1
1853 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1854 command line arguments, and the EMACS_UNIBYTE environment variable, no
1855 longer have any effect. (They were declared obsolete in Emacs 23.)
1857 ** New command line option `--no-site-lisp' removes site-lisp directories
1858 from load-path. -Q now implies this. This option does not affect the
1859 EMACSLOADPATH environment variable (and hence has no effect for
1863 * Changes in Emacs 24.1
1867 *** Many packages now use the `completion-at-point' command,
1868 rather than implementing separate completion commands.
1870 *** `completion-at-point' now handles tags and semantic completion.
1872 *** Completion in a non-minibuffer now tries to detect the end of completion
1873 and pops down the *Completions* buffer accordingly.
1875 *** New option `completion-cycle-threshold' allows completion cycling.
1877 *** New option `completion-category-overrides' for overriding the
1878 default completion style in certain circumstances.
1880 *** New completion style `substring'.
1882 *** Completion of buffer names uses `substring' completion by default.
1884 *** The option `widget-complete-field' has been removed.
1888 *** The first time you try sending mail, Emacs asks for a mail method.
1889 This is implemented by a new default for `send-mail-function', which
1890 is `sendmail-query-once'. This offers to use the smtpmail package, or
1891 to use the old defaults relying on external mail facilities
1892 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
1893 `mailclient-send-it' on Windows).
1895 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
1896 transfers the report to your desktop's preferred mail client, if there
1897 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
1900 *** See Changes in Specialized Modes and Packages for SMTPmail changes
1901 and Mail mode changes
1903 ** Emacs server and client changes
1905 *** New option `server-port' specifies the port for TCP Emacs servers.
1907 *** New emacsclient argument -q/--quiet suppresses some status messages.
1909 *** New emacsclient argument --frame-parameters specifies the frame
1910 parameters of any newly-created graphical frame.
1912 *** If emacsclient shuts down due to Emacs signaling an error,
1913 its exit status is 1.
1915 *** New emacsclient argument --parent-id ID.
1916 This opens a client frame in parent X window ID, via XEmbed, similar
1917 to the --parent-id argument to Emacs.
1919 ** Internationalization changes
1921 *** Emacs now supports display and editing of bidirectional text.
1922 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1923 displayed in the correct visual order as expected by users of those
1924 scripts. The display reordering is a "full bidirectionality" class
1925 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1926 with no RTL text should look exactly the same as before.
1928 **** New buffer-local variable `bidi-display-reordering'.
1929 To disable display reordering in a buffer, change this to nil.
1931 **** New buffer-local variable `bidi-paragraph-direction'.
1932 If nil (the default), Emacs determines the base direction of each
1933 paragraph from its text, as specified by the UBA. Setting the value
1934 to `right-to-left' or `left-to-right' forces a base direction on each
1937 Paragraphs with right-to-left base direction are displayed starting at
1938 the right window edge.
1940 *** Enhanced support for characters with no glyphs in available fonts,
1941 or, on text terminals, characters that cannot be encoded by the
1942 terminal coding system. The new option `glyphless-char-display-control'
1943 specifies how to display them: as a hexadecimal code in a box, a thin
1944 1-pixel space, an empty box, etc.
1946 *** New input methods for Farsi and Bulgarian
1947 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
1949 *** `nobreak-char-display' now also highlights Unicode hyphen chars
1950 (U+2010 and U+2011).
1952 *** New Hebrew translation of the Emacs Tutorial.
1953 Type `C-u C-h t' to choose it in case your language setup doesn't
1954 automatically select it.
1956 ** An Emacs Lisp package manager is now included.
1957 This is a convenient way to download and install additional packages,
1958 from a package repository at http://elpa.gnu.org.
1960 *** M-x list-packages shows a list of packages, which can be
1961 selected for installation.
1963 *** New command `describe-package', bound to `C-h P'.
1965 *** By default, all installed packages are loaded automatically when
1966 Emacs starts up. To disable this, set `package-enable-at-startup' to
1967 nil. To specify the packages to load, customize `package-load-list'.
1969 ** Custom theme changes
1971 *** New command `M-x customize-themes', which provides a convenient
1972 interface for enabling and disabling Custom themes.
1974 *** New option `custom-theme-load-path' is the load path for themes.
1975 Emacs no longer looks for Custom themes in `load-path'. The default
1976 value of `custom-theme-load-path' says to look for themes in
1977 `custom-theme-directory', followed by a subdirectory of
1978 `data-directory' named "themes/", which contains a small selection of
1979 built-in Custom themes.
1981 *** New option `custom-safe-themes' records known-safe theme files.
1982 If a theme is not in this list, Emacs queries before loading it, and
1983 offers to save the theme to `custom-safe-themes' automatically. By
1984 default, all themes included in Emacs are treated as safe.
1986 ** Improved GTK integration
1988 *** GTK scroll-bars are now placed on the right by default.
1989 The function `set-scroll-bar-mode' can change this.
1991 *** GTK tool bars can have just text, just images or images and text.
1992 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
1993 the default is taken from desktop settings.
1995 *** GTK tool bars can be placed on any edge of the frame.
1996 The frame-parameter tool-bar-position controls this. It takes the
1997 values top, left, right or bottom. The Options => Show/Hide menu has
2000 *** The default colors for selected text (the `region' face) are taken
2001 from the GTK theme when Emacs is built with GTK.
2003 *** Emacs uses GTK tooltips by default if built with GTK.
2004 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2006 ** Graphical interface changes
2008 *** On graphical displays, the mode-line no longer ends in dashes.
2009 Also, the first dash (which does not indicate anything) is just
2010 displayed as a space.
2012 *** `menu-bar-select-buffer-function' lets you choose another operation
2013 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2015 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2016 built with Xft. These fonts can be set via X resources, for example:
2017 Emacs.pane.menubar.font: Courier-12
2021 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2022 or if it receives a SIGINT signal in batch mode.
2024 *** `kill-emacs-hook' is now also run in batch mode.
2025 Third-party code which adds to `kill-emacs-hook' should check if they
2026 do the right thing in batch mode.
2028 ** Scrolling changes
2030 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2031 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2032 of buffer at first key-press (instead they move to top/bottom of buffer)
2033 when `scroll-error-top-bottom' is non-nil.
2035 *** New option `scroll-error-top-bottom' (see above).
2037 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2038 scroll a line instead of full screen.
2040 *** New property `scroll-command' should be set on a command's symbol to
2041 define it as a scroll command affected by `scroll-preserve-screen-position'.
2043 *** If you customize `scroll-conservatively' to a value greater than 100,
2044 Emacs will never recenter point in the window when it scrolls due to
2045 cursor motion commands or commands that move point (e.f., `M-g M-g').
2046 Previously, you needed to use `most-positive-fixnum' as the value of
2047 `scroll-conservatively' to achieve the same effect.
2049 *** "Aggressive" scrolling now honors the scroll margins.
2050 If you customize `scroll-up-aggressively' or
2051 `scroll-down-aggressively' and move point off the window, Emacs now
2052 scrolls the window so as to avoid positioning point inside the scroll
2055 ** Basic SELinux support has been added.
2056 This requires Emacs to be linked with libselinux at build time.
2058 *** Emacs preserves the SELinux file context when backing up.
2059 Also, the function `copy-file' has an extra optional argument for
2060 preserving SELinux context, and the return value of `backup-buffer'
2061 now includes the SELinux context.
2063 *** New functions `file-selinux-context' and `set-file-selinux-context'
2064 get and set the SELinux context of a file.
2068 *** `delete-by-moving-to-trash' now only affects commands that specify
2069 trashing. This avoids inadvertently trashing temporary files.
2071 *** Calling `delete-file' or `delete-directory' with a prefix argument
2072 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2074 ** File- and directory-local variable changes
2076 *** You can stop directory local vars from applying to subdirectories.
2077 Add an element (subdirs . nil) to the alist portion of any variables
2078 settings to indicate that the section should not apply to
2081 *** Directory local variables can apply to some file-less buffers.
2082 Affected modes include dired, vc-dir, and log-edit. For example,
2083 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2084 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2085 `hack-dir-local-variables-non-file-buffer' to support this.
2087 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2088 Instead, use "eval: (minor-mode 1)".
2090 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2091 to `inhibit-local-variables-regexps'. As the name suggests, it now
2092 applies to ALL file local variables, not just -*- lines. The
2093 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2098 *** The `quit-window' command now restores the last buffer displayed
2099 in the quitted window.
2101 *** Resizing an Emacs frame now preserves proportional window sizes,
2102 modulo restrictions like window minimum sizes and fixed-size windows.
2104 *** The behavior of `display-buffer' is now customizable in detail.
2106 **** New option `display-buffer-base-action' specifies a list of
2107 user-determined display "actions" (functions and optional arguments
2108 for choosing the displaying window).
2110 This takes precedence over the default display action, which is
2111 specified by `display-buffer-fallback-action'.
2113 **** New option `display-buffer-alist' maps buffer name regexps to
2114 display actions, taking precedence over `display-buffer-base-action'.
2116 *** New option `window-combination-limit'.
2117 The new option `window-combination-limit' allows to return the space
2118 obtained for resizing or creating a window more reliably to the window
2119 from which such space was obtained.
2121 *** New option `window-combination-resize'.
2122 The new option `window-combination-resize' allows to split a window that
2123 otherwise cannot be split because it's too small by stealing space from
2124 other windows in the same combination. Subsequent resizing or deletion
2125 of the window will resize all windows in the same combination as well.
2127 *** New option `frame-auto-hide-function' lets you choose between
2128 iconifying or deleting a frame when burying a buffer in a dedicated
2129 frame, or quitting a window showing a buffer in a frame of its own.
2131 *** New commands `maximize-window' and `minimize-window'.
2132 These maximize and minimize the size of a window within its frame.
2134 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2135 These functions allow to navigate through the live buffers that have
2136 been shown in a specific window.
2138 ** Minibuffer changes
2140 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2141 This is handy for minibuffer-only frames, and is also used for the feature
2142 where mouse-1 pops up *Messages*"', which can now easily be changed.
2144 *** Minibuffers set `truncate-lines' to nil.
2145 If you want to change the value to something else, you could use
2146 for example `minibuffer-setup-hook'.
2148 ** `auto-mode-case-fold' is now enabled by default.
2150 ** `backup-by-copying-when-mismatch' now defaults to t.
2152 ** New basic faces `error', `warning', `success'.
2153 These are used to highlight text indicating failure, caution or
2154 successful operation.
2156 ** New option `list-colors-sort' defines the color sort order
2157 for `list-colors-display'.
2159 ** The variable `focus-follows-mouse' now always defaults to nil.
2162 * Editing Changes in Emacs 24.1
2166 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2167 `isearch-yank-line'.
2169 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2170 `isearch-yank-kill'.
2172 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2174 ** New commands `count-words-region' and `count-words'.
2176 *** M-= is bound to `count-words-region', not `count-lines-region'.
2177 The `count-words-region' command, when called interactively, reports
2178 the number of lines, words, and characters in the region. It is a
2179 superset of the old `count-lines-region', which is now an obsolete
2182 ** The command `just-one-space' (M-SPC), if given a negative argument,
2183 also deletes newlines around point.
2187 *** New option `delete-active-region'.
2188 If non-nil, [delete] and DEL delete the region if it is active and no
2189 prefix argument is given. If set to `kill', those commands kill
2192 *** New command `delete-forward-char', bound to [delete].
2193 This is meant for interactive use, and obeys `delete-active-region'.
2194 The command `delete-char' does not obey `delete-active-region'.
2196 *** `delete-backward-char' is now a Lisp function.
2197 Apart from obeying `delete-active-region', its behavior is unchanged.
2198 However, the byte compiler now warns if it is called from Lisp; Lisp
2199 callers should use delete-char with a negative argument instead.
2201 *** The option `mouse-region-delete-keys' has been deleted.
2203 ** Selection changes.
2205 The default handling of clipboard and primary selections has been
2206 changed to conform with modern X applications. In short, most
2207 commands for killing and yanking text now use the clipboard, while
2208 mouse commands use the primary selection.
2210 In the following, we provide a list of these changes, followed by a
2211 list of steps to get the old behavior back if you prefer that.
2213 *** `select-active-regions' now defaults to t.
2214 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2215 the kill ring. The selected text is put in the primary selection, if
2216 the system possesses a separate primary selection facility (e.g. X).
2218 **** `select-active-regions' also accepts a new value, `only'.
2219 This means to only set the primary selection for temporarily active
2220 regions (usually made by mouse-dragging or shift-selection);
2221 "ordinary" active regions, such as those made with C-SPC followed by
2222 point motion, do not alter the primary selection.
2224 **** `mouse-drag-copy-region' now defaults to nil.
2226 *** mouse-2 is now bound to `mouse-yank-primary'.
2227 This pastes from the primary selection, ignoring the kill-ring.
2228 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2230 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2232 *** `x-select-enable-primary' now defaults to nil.
2233 Thus, commands that kill text or copy it to the kill-ring (such as
2234 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2236 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2237 exactly equivalent to M-w, C-w, and C-y respectively.
2239 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2240 non-nil by default, as Windows does not support the primary selection
2241 between applications.
2243 *** To return to the previous behavior, do the following:
2245 **** Change `select-active-regions' to nil.
2246 **** Change `mouse-drag-copy-region' to t.
2247 **** Change `x-select-enable-primary' to t (on X only).
2248 **** Change `x-select-enable-clipboard' to nil.
2249 **** Bind `mouse-yank-at-click' to mouse-2.
2251 *** Support for X cut buffers has been removed.
2253 *** X clipboard managers are now supported.
2254 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2256 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2257 in the current rectangle. With a prefix argument, this prompts for a
2258 number to count from and for a format string.
2260 ** `redisplay-dont-pause' now defaults to t.
2261 This makes Emacs feel more responsive to editing commands that arrive
2262 at high rate, e.g. if you lean on some key, because stopping redisplay
2263 in the middle (when this variable is nil) forces more expensive
2264 updates later on, and Emacs appears to be unable to keep up.
2266 ** The behavior of <TAB> for active regions in Text mode has changed.
2267 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2268 when the region is active causes Emacs to indent all the lines in the
2269 region, aligning them with the line previous to the first line in the
2270 region (or with the left margin if there is no previous line).
2272 ** When `occur' is called with a prefix argument, matching strings are
2273 collected into the `*Occur*' buffer without line numbers. If there
2274 are parenthesized subexpressions in the specified regexp, `occur'
2275 reads replacement text that may contain \\& and \\N whose convention
2276 follows `replace-match'.
2279 * Changes in Specialized Modes and Packages in Emacs 24.1
2281 ** Archive Mode has basic support for browsing and updating 7z archives.
2285 *** BibTeX mode now supports biblatex.
2286 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2287 `bibtex-entry-field-alist' is now an obsolete alias for
2288 `bibtex-BibTeX-entry-alist'.
2290 *** New command `bibtex-search-entries', bound to C-c C-a.
2292 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2294 *** New variable `bibtex-search-entry-globally'.
2298 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2300 *** The default browser used by the package is now the "xdg-open" program,
2301 on platforms that support it. This calls your desktop's preferred browser.
2305 *** Support for musical notes.
2307 *** Support for logarithmic units.
2309 *** No longer uses the tex prefix for TeX specific unit names when
2310 using TeX or LaTeX mode.
2312 *** New option to highlight selections using faces.
2314 *** `calc-histogram' has the option of using a vector to determine the bins.
2316 *** New "O" option prefix.
2318 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2320 ** Calendar, Diary, and Appt
2322 *** Diary entries can contain non-printing "comments".
2323 See the variable `diary-comment-start'.
2325 *** Appointments can specify their individual warning times.
2326 See the variable `appt-warning-time-regexp'.
2328 *** The function specified by `appt-disp-window-function' may be passed
2329 lists of arguments if multiple appointments are due at similar times.
2330 If you are using a custom function for this, you should update it.
2332 *** New function `diary-hebrew-birthday'.
2334 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2335 may no longer be nil, but must all be strings.
2337 *** The obsolete (since Emacs 22.1) method of enabling the appt
2338 package by adding `appt-make-list' to `diary-hook' has been removed.
2339 Use `appt-activate' instead.
2341 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2342 appt-issue-message (use the function appt-activate)
2343 appt-visible/appt-msg-window (use the variable appt-display-format)
2345 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2346 view-diary-entries, list-diary-entries, show-all-diary-entries
2350 *** New feature to "guess" the style in an existing buffer.
2351 The main entry point is M-x c-guess.
2353 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2355 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2356 Thus C-M-a will, by default, go to the beginning of the immediate function,
2359 *** "Macros with semicolons" can be registered for correct indentation.
2360 Where such a macro ends a line (no semicolon) the next statement is no longer
2361 parsed as a statement continuation.
2363 ** Comint and modes derived from it use the standard completion code.
2367 *** Compilation mode can be used without Font Lock mode.
2368 `compilation-parse-errors-function' is now obsolete.
2370 *** New variable `compilation-filter-start', which is bound while
2371 `compilation-filter-hook' runs. It records the start position of the
2372 text inserted by `compilation-filter'.
2374 *** `compilation-error-screen-columns' and `compilation-first-column'
2375 are obeyed in the editing buffer. So programming language modes can
2376 set them, whereas previously only the value in the *Compilation*
2381 *** Customize buffers now contain a search field.
2382 The search is performed using `customize-apropos'.
2383 To turn off the search field, set `custom-search-field' to nil.
2385 *** Options in customize group buffers start out hidden if not customized.
2386 Use the arrow to the left of the option name to toggle visibility.
2388 *** custom-buffer-sort-alphabetically now defaults to t.
2390 *** The color widget now has a "Choose" button, which allows you to
2391 choose a color via `list-colors-display'.
2395 *** It is now possible to access buses other than the default system
2398 *** The `dbus-register-method' and `dbus-register-property' functions
2399 optionally do not register names.
2401 *** The new function `dbus-register-service' registers a known service
2402 name on a D-Bus without also registering a property or a method.
2406 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2407 if called with a prefix argument, read a file name from the minibuffer
2408 instead of using the current buffer.
2410 *** The "dired local variables" feature of Dired-x is obsolete.
2411 The standard directory local variables feature replaces it.
2415 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2416 controlling attempts to autojoin a channel.
2418 *** New variable `erc-coding-system-precedence': If we use `undecided'
2419 as the server coding system, this variable will then be consulted.
2420 The default is to decode strings that can be decoded as utf-8 as
2421 utf-8, and do the normal `undecided' decoding for the rest.
2425 *** The default value of `eshell-directory-name' has changed
2426 to be an "eshell" directory in `user-emacs-directory'.
2427 The old "~/.eshell/" directory is still used if it exists, though.
2431 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2432 It now supports multithread non-stop debugging and simultaneous
2433 debugging of several threads.
2437 *** RET (`image-toggle-animation') toggles animation, if applicable.
2438 Animation plays once, unless the option `image-animate-loop' is non-nil.
2442 *** New command M-x info-display-manual displays a named Info manual.
2443 If that manual is already visited in some Info buffer, it displays
2444 that buffer. (This is handy if you have many manuals in many *info*
2445 buffers, and don't remember the name of the buffer visiting the manual
2446 you want to consult.) Otherwise, it loads and displays the manual.
2448 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2449 This is for compatibility with the stand-alone Info reader program,
2450 and also because `Info-edit' is a rarely used command that is disabled
2453 ** Mail mode changes (not Message mode)
2455 *** New command M-x mail-add-attachment for adding MIME attachments
2457 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2458 (Its name is misleading, since it has nothing to do with MIME
2459 attachments.) The old name is now an obsolete alias to the new name.
2461 ** MH-E has been updated to MH-E version 8.3.1.
2462 See MH-E-NEWS for details.
2464 ** Modula-2 mode provides auto-indentation.
2466 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2468 ** nXML mode no longer binds C-RET to `nxml-complete'.
2469 Completion is now performed via `completion-at-point', bound to C-M-i
2470 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2471 default), this performs tag completion.
2473 ** Org mode has been updated to version 7.8.09.
2474 See ORG-NEWS for details.
2476 ** Prolog mode has been completely revamped, with lots of additional
2477 functionality such as more intelligent indentation, electricity,
2478 support for more variants, including Mercury, and a lot more.
2482 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2483 in the Rmail incoming message.
2485 *** The variable `rmail-message-filter' no longer has any effect.
2486 This change was made in Emacs 23.1 but was not advertised at the time.
2487 Try using `rmail-show-message-hook' instead.
2491 *** M-x shell prompts for the shell path name if the default directory
2492 is a remote file name and neither the environment variable $ESHELL nor
2493 the variable `explicit-shell-file-name' is set.
2495 *** TAB is now bound to the standard `completion-at-point' command,
2496 which now implements the pcomplete rules for shell command completion.
2500 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2501 if the mail server supports them. This uses either built-in GnuTLS
2502 support, or the starttls.el library. Customize `smtpmail-stream-type'
2505 *** The variable `smtpmail-auth-credentials' has been removed.
2506 By default, the information is now stored in the file ~/.authinfo.
2507 This was the default value of smtpmail-auth-credentials. If you had
2508 customized smtpmail-auth-credentials to a list of user names and
2509 passwords, those settings are not used. During your first connection
2510 to the smtp server, Emacs will prompt for the user name and password,
2511 and offer to save them to ~/.authinfo. Or you can manually copy the
2512 credentials to ~/.authinfo. For example, if you had
2514 (setq smtpmail-auth-credentials
2515 '(("mail.example.org" 25 "jim" "s!cret")))
2517 then the equivalent line in ~/.authinfo would be
2519 machine mail.example.org port 25 login jim password s!cret
2521 See the auth-source manual for more information, e.g. on encrypting
2522 the credentials file.
2524 *** The variable `smtpmail-starttls-credentials' has been removed.
2525 If you had that set, you need to put
2527 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2529 in your ~/.authinfo file instead.
2531 *** SMTPmail defaults to using the address in the From: header as the
2532 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2533 to the address you wish to use instead.
2537 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2538 and `sql-oracle-scan-on'.
2540 *** New options controlling prompting for login parameters.
2541 Each supported product has a custom variable `sql-*-login-params',
2542 which is a list of the parameters to be prompted for before a
2543 connection is established.
2545 *** The command `sql-product-interactive' now takes a prefix argument,
2546 which causes it to prompt for an SQL product.
2548 *** Product-specific SQL interactive commands now take prefix arguments.
2549 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2550 given a prefix argument, prompt for a name for the SQL interactive
2551 buffer. This reduces the need for calling `sql-rename-buffer'.
2553 *** SQL interactive modes suppress command continuation prompts, and
2554 replace tabs with spaces. The first change impacts multiple line SQL
2555 statements entered with C-j between each line, statements yanked into
2556 the buffer and statements sent with `sql-send-*' functions. The
2557 second prevents the MySQL and Postgres interpreters from listing
2558 object name completions when sent text via `sql-send-*' functions.
2560 *** New command `sql-connect' starts a predefined SQLi session,
2561 using the login parameters from `sql-connection-alist'.
2563 *** New "Save Connection" menu item in SQLi buffers.
2564 This gathers the login params specified for the SQLi session, if it
2565 was not started by a connection, and saves them as a new connection.
2567 *** New commands for listing database objects and details:
2568 sql-list-all and sql-list-table.
2570 *** An API for manipulating SQL product definitions has been added.
2574 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2578 *** New inline access method "ksu" (kerberized su).
2580 *** The following access methods are discontinued: "ssh1_old",
2581 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2583 *** The user option `remote-file-name-inhibit-cache' controls whether
2584 remote file attributes are cached for better performance.
2586 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2587 default value to "".
2589 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2590 for remote machines which support SELinux.
2592 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2593 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2594 the degree of parallelism.
2596 ** VC and related modes
2598 *** Support for pulling on distributed version control systems.
2599 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2600 supported (currently with Bzr, Git, and Mercurial), to update the
2601 current branch and working tree. A prefix argument means to prompt
2602 the user for specifics, e.g. a pull location.
2604 *** `vc-update' is now an alias for `vc-pull'.
2606 *** Support for merging on distributed version control systems.
2607 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2608 is supported (currently with Bzr, Git, and Mercurial), to merge
2609 changes from another branch into the current one. It prompts for
2610 specifics, e.g. a merge source.
2612 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2613 shows a diff while querying the user. It defaults to t.
2615 *** Log entries in some Log View buffers can be toggled to display a
2616 longer description by typing RET (log-view-toggle-entry-display).
2617 This is currently supported for Bzr, Git, and Mercurial (to support
2618 another backend, define a `log-view-expanded-log-entry-function').
2619 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2620 use this to display the full log entry for the revision at point.
2622 *** New command `vc-ediff' allows visual comparison of two revisions
2623 of a file similar to `vc-diff', but using ediff backend.
2625 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2626 this was not advertised at the time.
2628 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2629 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2630 this was not advertised at the time.
2636 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2638 *** partial-completion-mode (complete.el) is obsolete.
2639 You can get a comparable behavior with:
2640 (setq completion-styles '(partial-completion initials))
2641 (setq completion-pcm-complete-word-inserts-delimiters t)
2643 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2645 *** pgg is obsolete (use EasyPG instead).
2647 *** sregex.el is obsolete, since rx.el is a strict superset.
2649 *** s-region.el and pc-select.el are obsolete.
2650 They are superseded by shift-select-mode, enabled by default since 23.1.
2652 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2656 *** The Landmark game is now invoked with `landmark', not `lm'.
2657 Its functions and variables have been similarly renamed.
2659 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2660 (This interfered with cua-mode.)
2662 *** f90.el has some support for Fortran 2008 syntax.
2664 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2666 *** New command `nato-region' converts text to NATO phonetic alphabet.
2669 * New Modes and Packages in Emacs 24.1
2671 ** Occur Edit mode applies edits made in *Occur* buffers to the
2672 original buffers. It is bound to "e" in Occur mode.
2674 ** New global minor mode electric-pair-mode.
2675 When enabled, typing an open parenthesis automatically inserts the
2676 matching closing one.
2678 ** New global minor mode electric-indent-mode.
2679 When enabled, typing certain characters triggers reindentation.
2680 Major modes wishing to use this can set electric-indent-chars or
2681 electric-indent-functions.
2683 ** New global minor mode electric-layout-mode.
2684 When enabled, typing certain characters automatically inserts newlines.
2685 Major modes wishing to use this can set electric-layout-rules.
2687 ** tabulated-list.el provides a generic major mode for tabulated data,
2688 from which other modes can be derived.
2690 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2692 ** secrets.el is an implementation of the Secret Service API, an
2693 interface to password managers like GNOME Keyring or KDE Wallet. The
2694 Secret Service API requires D-Bus for communication. The command
2695 `secrets-show-secrets' offers a buffer with a visualization of the
2698 ** notifications.el provides an implementation of the Desktop
2699 Notifications API. It requires D-Bus for communication.
2701 ** soap-client.el supports access to SOAP web services from Emacs.
2702 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2704 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
2706 ** New emacs-lock.el package.
2707 The previous version has been moved to obsolete/old-emacs-lock.el.
2708 Now, there is a proper minor mode `emacs-lock-mode'. Protection
2709 against exiting Emacs and killing the buffer can be set separately.
2710 The mechanism for automatically turning off protection for buffers
2711 with dead inferior processes has been generalized.
2714 * Incompatible Lisp Changes in Emacs 24.1
2716 ** Passing a nil argument to a minor mode function call now ENABLES
2717 the minor mode unconditionally. This is so that you can write e.g.
2719 (add-hook 'text-mode-hook 'foo-mode)
2721 to enable foo-mode in Text mode buffers, removing the need for
2722 `turn-on-foo-mode' style functions. This affects all mode commands
2723 defined by `define-minor-mode'. If called interactively, the mode
2724 command still toggles the minor mode.
2726 ** The return value of `backup-buffer' has changed.
2727 It is now a list of three elements, where the second element is a list
2728 describing the original file's SELinux context. If Emacs or the
2729 system lacks SELinux support, the context list is (nil nil nil nil).
2730 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
2732 ** `char-direction-table' and the `char-direction' function were deleted.
2733 They were buggy and inferior to the new support of bidirectional
2734 editing introduced in Emacs 24. If you need the bidirectional
2735 properties of a character, use `get-char-code-property' with the last
2736 argument `bidi-class'.
2738 ** `copy-directory' now copies the source directory as a subdirectory
2739 of the target directory, if the latter is an existing directory. The
2740 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2741 the contents directly into a pre-existing target directory.
2743 ** For mouse click input events in the text area, the Y pixel
2744 coordinate in the POSITION list now counts from the top of the text
2745 area, excluding any header line. Previously, it counted from the top
2748 ** Support for "old-style" backquotes, obsolete for 10+ years, has
2749 been further reduced. Now a backquote not followed by a space is
2750 always treated as a "new-style" backquote. Please remove all
2751 "old-style" backquotes from your code. If your code uses backquotes
2752 as documented in the Elisp manual, and compiles without warning, then
2753 you have nothing to do in this regard. Code not following the
2754 appropriate conventions may fail to compile.
2756 The most common cause of trouble seems to be an old-style backquote
2757 followed by a newline. Another cause of trouble is vector notation
2758 for key sequence notation: instead of [(control ,)] and [(control ')],
2759 you should write [(control ?,)] and [(control ?')], which will work in
2762 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2763 was not advertised at the time. The function `custom-initialize-delay'
2764 replaced all known uses.
2766 ** `view-buffer' now treats special mode-class in the same way that
2767 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2768 major mode is special).
2770 ** Menu and tool bar changes
2772 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
2773 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2774 With these alist entries omitted, `make-frame' checks the value of the
2775 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2776 a menu-bar or tool-bar, respectively. If the alist entries are added,
2777 they override the value of `menu-bar-mode'/`tool-bar-mode'.
2779 *** The menu bar bindings's caches are not used any more.
2780 Use (where-is-internal <def> nil t) instead.
2782 ** Regions created by mouse dragging are now normal active regions,
2783 similar to those created by shift-selection (see Selection changes
2784 above). In previous Emacs versions, these regions were delineated by
2785 `mouse-drag-overlay'; that variable has been removed.
2787 ** The fourth argument of `filter-buffer-substring' has been removed.
2788 If you want to remove text properties from the final result, simply
2789 pass the result through substring-no-properties.
2791 ** cl.el no longer provides `cl-19'.
2793 ** The following obsolete functions and aliases have been removed
2794 (the appropriate new function is given in parentheses; "not needed"
2795 means you can just remove all calls to the function in question):
2797 *** `comint-kill-output' (`comint-delete-output')
2798 *** `decompose-composite-char' (`char-to-string')
2799 *** `outline-visible' (`outline-invisible-p')
2800 *** `internal-find-face' (`facep')
2801 *** `internal-get-face' (`facep and check-face')
2802 *** `frame-update-faces' (not needed)
2803 *** `frame-update-face-colors' (`frame-set-background-mode')
2804 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2805 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2806 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2807 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2808 *** `x-make-font-unbold' (`make-face-unbold')
2809 *** `x-make-font-unitalic' (`make-face-unitalic')
2810 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2811 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2812 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2813 *** `char-bytes' (== 1)
2814 *** `isearch-return-char' (`isearch-printing-char')
2815 *** `make-local-hook' (not needed)
2816 *** `set-screen-height' (`set-frame-height')
2817 *** `set-screen-width' (`set-frame-width')
2819 ** The following obsolete variables and varaliases have been removed
2820 (the appropriate new variable is given in parentheses):
2822 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2823 *** `vc-header-alist' (`vc-BACKEND-header')
2824 *** `directory-sep-char' (== ?/)
2825 *** `font-lock-defaults-alist' (`font-lock-defaults')
2826 *** `e' (`float-e').
2828 ** The following obsolete files were removed:
2829 sc.el, x-menu.el, rnews.el, rnewspost.el
2831 ** The format of the finder-inf.el file has changed, since the Finder
2832 mechanism is now based on the package system. The variable
2833 `finder-package-info' is replaced by `package--builtins' and
2834 `finder-keywords-hash'.
2836 ** When generating autoloads, `update-directory-autoloads' no longer
2837 assumes every inspected file is in your `load-path'. It instead
2838 generates relative names according to the current `load-path'.
2841 * Lisp Changes in Emacs 24.1
2843 ** Code can now use lexical scoping by default instead of dynamic scoping.
2844 The `lexical-binding' variable enables lexical scoping for local
2845 variables. It is typically set via a file-local variable in the first
2846 line of the file, in which case it applies to all the code in that
2849 *** `eval' takes a new optional argument `lexical' to choose the new lexical
2850 binding instead of the old dynamic binding mode.
2852 *** Lexically scoped interpreted functions are represented with a new form
2853 of function value which looks like (closure ENV ARGS &rest BODY).
2855 *** New macro `letrec' to define recursive local functions.
2857 *** `defvar' and `defconst' now mark the variable as special (dynamic).
2858 So do `defcustom' and other forms that call `defvar' as a subroutine.
2860 *** New function `special-variable-p' to check whether a variable is
2861 declared as dynamically bound.
2863 *** The form ((lambda ...) ...) is deprecated.
2865 ** An Emacs Lisp testing tool is now included.
2866 Emacs Lisp developers can use this tool to write automated tests for
2867 their code. See the ERT info manual for details.
2869 ** Changes for bidirectional display and editing
2871 *** New function `current-bidi-paragraph-direction'.
2872 This returns the base direction of the paragraph at point.
2874 *** New function `bidi-string-mark-left-to-right'.
2875 Given a string containing characters from right-to-left scripts, this
2876 function returns another string which can be safely inserted into a
2877 buffer, such that any following text will be always displayed to the
2878 right of that string. (This works by appending an invisible Unicode
2879 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
2881 This is useful when the buffer has overall left-to-right paragraph
2882 direction and you need to insert a string whose contents are not known
2883 in advance, without disrupting the layout of the line.
2887 *** Window tree functions are accessible in Elisp.
2888 Functions are provided to return the parent, siblings or child windows
2889 of any window including internal windows (windows not associated with a
2890 buffer) in the window tree.
2892 **** New function `window-valid-p' gives non-nil for live and internal
2895 **** Window manipulation can deal with internal windows.
2896 Many window handling functions like `split-window', `delete-window', or
2897 `delete-other-windows' as well as the window resizing functions can now
2898 act on any window including internal ones.
2900 *** window-total-height/-width vs window-body-height/-width.
2901 The function `window-height' has been renamed to `window-total-height'
2902 and `window-width' has been renamed to `window-body-width'. The old
2903 names are provided as aliases. Two new functions `window-total-width'
2904 and `window-body-height' are provided.
2906 *** Window parameters specific to window handling functions.
2907 For each window you can specify a parameter to override the default
2908 behavior of a number of functions like `split-window', `delete-window'
2909 and `delete-other-windows'. The variable `ignore-window-parameters'
2910 allows to ignore processing such parameters.
2912 *** New semantics of third argument of `split-window'.
2913 The third argument of `split-window' has been renamed to SIDE and can be
2914 set to any of the values 'below, 'right, 'above, or 'left to make the
2915 new window appear on the corresponding side of the window that shall be
2916 split. Any other value of SIDE will cause `split-window' to split the
2917 window into two side-by-side windows as before.
2919 *** Window resizing functions.
2920 A new standard function for resizing windows called `window-resize' has
2921 been introduced. This and all other functions for resizing windows no
2922 longer delete any windows when they become too small.
2924 *** Deleting the selected window now selects the most recently selected
2925 live window on that frame instead.
2927 *** `adjust-window-trailing-edge' adjustments.
2928 `adjust-window-trailing-edge' can now deal with fixed-size windows and
2929 is able to resize other windows if a window adjacent to the trailing
2930 edge cannot be shrunk any more. This makes its behavior more similar to
2931 that of Emacs 21 without compromising, however, its inability to delete
2932 windows which was introduced in Emacs 22.
2934 *** Window-local buffer lists.
2935 Windows now have local buffer lists. This means that removing a buffer
2936 from display in a window will preferably show the buffer previously
2937 shown in that window with its previous window-start and window-point
2938 positions. This also means that the same buffer may be automatically
2939 shown twice even if it already appears in another window.
2941 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2942 which if non-nil requires the buffer to be displayed in the currently
2943 selected window, signaling an error otherwise. If nil, another window
2944 can be used, e.g. if the selected one is strongly dedicated.
2946 *** `split-window-vertically' and `split-window-horizontally' renamed
2947 to `split-window-below' and `split-window-right' respectively.
2948 The old names are kept as aliases.
2952 **** The second arg to `display-buffer' and `pop-to-buffer' is now
2953 named ACTION, and takes a display action of the same form as
2954 `display-buffer-base-action' (see Changes, above). A non-nil,
2955 non-list value is treated specially, as the old meaning.
2957 **** New variable `display-buffer-overriding-action'.
2959 **** The procedure of `display-buffer' etc. to choose a window is
2960 determined by combining `display-buffer-overriding-action',
2961 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2962 and `display-buffer-fallback-action'. The second and fourth of these
2963 are user-customizable variables.
2965 See the docstring of `display-buffer' for details.
2967 *** New functions `window-state-get' and `window-state-put'.
2968 These functions allow to save and restore the state of an arbitrary
2969 frame or window as an Elisp object.
2973 *** New variable `completion-extra-properties' used to specify extra
2974 properties of the current completion:
2975 - :annotate-function, same as the old completion-annotate-function.
2976 - :exit-function, function to call after completion took place.
2978 *** Functions on `completion-at-point-functions' can return any of the
2979 properties valid for `completion-extra-properties'.
2981 *** `completion-annotate-function' is obsolete.
2983 *** New `metadata' method for completion tables. The metadata thus returned
2984 can specify various details of the data returned by `all-completions':
2985 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
2986 used to select a style in completion-category-overrides.
2987 - `annotation-function' to add annotations in *Completions*.
2988 - `display-sort-function' to specify how to sort entries in *Completions*.
2989 - `cycle-sort-function' to specify how to sort entries when cycling.
2991 *** `minibuffer-local-filename-must-match-map' is not used any more.
2992 Instead, the bindings in `minibuffer-local-filename-completion-map'
2993 are combined with `minibuffer-local-must-match-map'.
2995 *** New variable `completing-read-function' allows overriding the
2996 behavior of `completing-read'.
2998 ** `glyphless-char-display' can now distinguish between graphical and
2999 text terminal display, via a char-table entry that is a cons cell.
3001 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3002 Instead, the offending function is removed.
3006 *** New function `run-hook-wrapped' for running an abnormal hook by
3007 passing the hook functions as arguments to a "wrapping" function.
3008 Like `run-hook-with-args-until-success', it stops at the first
3009 non-nil return value.
3011 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3012 set of "wrapping" filters, similar to around advice.
3013 (A version of this macro was actually added in Emacs 23.2 but was not
3014 advertised at the time.)
3018 *** New macro `condition-case-unless-debug' (this was actually added in
3019 Emacs 23.1 as condition-case-no-debug, but not advertised)
3021 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3023 *** Variable `stack-trace-on-error' removed.
3025 *** The debugger can now "continue" from an error, which means it will
3026 jump to the error handler as if the debugger had not been invoked
3027 instead of jumping all the way to the top-level.
3029 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3030 This can be useful when `inhibit-quit' is set.
3032 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3033 named Emacs server instances.
3035 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3036 to redirect STDOUT to a file.
3038 ** The function `format-time-string' now supports the %N directive,
3039 for higher-resolution time stamps.
3041 ** New input reading functions
3043 *** New function `read-char-choice' reads a restricted set of
3044 characters, discarding any inputs not inside the set.
3046 *** The command `read-color' now requires a match for a color name
3047 or RGB triplet, instead of signaling an error if the user provides
3050 **** `facemenu-read-color' is now an alias for `read-color'.
3052 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3053 The variable is now used to load all kind of supported dynamic libraries,
3054 not just image libraries. The previous name is still available as an
3057 ** Syntax parsing changes
3059 *** New variable `syntax-propertize-function'.
3060 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3061 This allows syntax-table properties to be set independently from font-lock:
3062 just call syntax-propertize to make sure the text is propertized.
3063 Together with this new variable come a new hook
3064 syntax-propertize-extend-region-functions, as well as two helper functions:
3065 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3066 as-is; and syntax-propertize-rules which provides a new way to specify
3069 *** Syntax tables support a new "comment style c" additionally to style b.
3071 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3073 ** frame-local variables cannot be let-bound any more.
3075 ** Major and minor mode changes
3077 *** `set-auto-mode' now respects mode: local variables at the end of files,
3078 as well as those in the -*- line.
3080 *** `prog-mode' is a new major mode from which programming modes
3083 **** `prog-mode-hook' can be used to enable features for programming
3084 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3085 on-the-fly spell checking for comments and strings.
3087 **** New minor modes `prettify-symbols-mode' and
3088 `global-prettify-symbols-mode' let the user enable symbol
3089 prettification (replacing a string like "lambda" with the Greek lambda
3092 *** New hook `change-major-mode-after-body-hook', run by
3093 `run-mode-hooks' just before any other mode hooks.
3095 *** Enabled globalized minor modes can be disabled in specific major modes.
3096 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3097 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3099 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3101 ** File-handling changes
3103 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3104 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3105 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3106 argument is supplied (see Trash changes, above).
3108 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3110 ** Tool-bars can display separators.
3111 Tool-bar separators are handled like menu separators in menu-bar maps,
3112 i.e. via menu entries of the form `(menu-item "--")'.
3116 *** Animated images support (currently animated gifs only).
3118 **** `image-animated-p' returns non-nil if an image can be animated.
3120 **** `image-animate' animates a supplied image spec.
3122 **** `image-animate-timer' returns the timer object for an image that
3125 *** `image-extension-data' has been renamed to `image-metadata'.
3126 The old name is an obsolete alias to the new one.
3128 *** Image mode can view any image type that ImageMagick supports.
3129 This requires Emacs to be built with ImageMagick support.
3131 **** New function `imagemagick-types', defined if ImageMagick support
3132 is enabled, returns a list of image file extensions that your
3133 ImageMagick installation supports.
3135 **** New function `imagemagick-register-types' enables ImageMagick
3136 image types in Image mode and in `create-image' and other helper
3139 **** New option `imagemagick-types-inhibit' excludes certain
3140 ImageMagick image types from `imagemagick-register-types'.
3142 **** With ImageMagick support, there are extra Image mode commands to
3143 resize and rotate images: `image-transform-fit-to-height',
3144 `image-transform-fit-to-width', `image-transform-set-rotation', and
3145 `image-transform-set-scale'.
3147 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3148 passes it to the mail user agent function. This argument specifies an
3149 action for returning to the caller after finishing with the mail. For
3150 example, this is used by Rmail to optionally delete a mail window.
3152 ** XML and HTML parsing
3153 If Emacs is compiled with libxml2 support, there are two new
3154 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3155 and `libxml-parse-xml-region' (which parses XML). Both return an
3156 Emacs Lisp parse tree.
3158 ** Networking and encryption changes
3160 *** `open-network-stream' can now be used to open an encrypted stream.
3161 It now accepts an optional `:type' parameter for initiating a TLS
3162 connection, directly or via STARTTLS. To do STARTTLS, additional
3163 parameters (`:end-of-command', `:success', `:capabilities-command')
3164 must also be supplied.
3166 *** New library gnutls.el.
3167 The new function `gnutls-available-p' returns non-nil if Emacs is
3168 built with GnuTLS support. The main entry points are
3169 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3170 these functions through `open-network-stream', because that can
3171 upgrade connections through STARTTLS opportunistically or use plain
3172 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3175 *** New primitive `secure-hash' that supports many secure hash algorithms:
3176 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3177 sha1.el has been removed. The `sha1' feature is provided by default.
3181 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3183 ** Progress reporters can now "spin".
3184 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3185 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3186 time you call `progress-reporter-update' on that progress reporter,
3187 with a nil or omitted VALUE argument, the reporter message is
3188 displayed with a "spinning bar".
3190 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3191 being reverted, even if the buffer has a local `revert-buffer-function'.
3193 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3194 If delayed-warnings-list is non-nil, the command loop calls
3195 `delayed-warnings-hook' after `post-command-hook'. At present, this
3196 is only used by Emacs on some platforms to display warnings during
3197 startup, which might otherwise not be noticed. This uses the
3198 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3200 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3202 ** New function `make-composed-keymap' that constructs a new keymap
3203 from multiple input maps. You can use this to make a keymap that
3204 inherits from multiple maps, eg:
3205 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3207 ** New function `string-prefix-p'.
3208 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3210 ** New reader macro ## that stands for the empty symbol.
3211 This means that the empty symbol can now be read back. Also, #: by itself
3212 (when not immediately followed by a possible symbol character) stands for
3213 an empty uninterned symbol.
3215 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3217 ** The following functions and variables are obsolete:
3219 *** `tooltip-use-echo-area' is obsolete.
3220 Rather than setting this to t, disable Tooltip mode instead.
3222 *** buffer-substring-filters is obsolete.
3223 Use `filter-buffer-substring-functions' instead.
3225 *** `byte-compile-disable-print-circle' is obsolete.
3227 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3228 Use `post-command-hook' instead.
3230 *** `font-lock-maximum-size' is obsolete.
3233 * Changes in Emacs 24.1 on Non-Free Operating Systems
3235 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3236 and also when HOME is set to C:\ by default.
3238 ** New configure.bat options
3240 *** --enable-checking builds Emacs with extra runtime checks.
3242 *** --distfiles specifies files to be included in binary distribution.
3244 *** --without-gnutls disables automatic GnuTLS detection.
3246 *** --lib for general library linkage, works with the USER_LIBS build variable.
3248 ** New make target `dist' to create binary distribution for MS Windows.
3250 ** The Lisp function `w32-default-color-map' is now obsolete.
3251 (It is only used internally in the Emacs C code.)
3253 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3254 reappear on mouse-over. (Requires OS X 10.6 or later.)
3256 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3257 other platforms, rather than inserting its contents into the buffer.
3260 ----------------------------------------------------------------------
3261 This file is part of GNU Emacs.
3263 GNU Emacs is free software: you can redistribute it and/or modify
3264 it under the terms of the GNU General Public License as published by
3265 the Free Software Foundation, either version 3 of the License, or
3266 (at your option) any later version.
3268 GNU Emacs is distributed in the hope that it will be useful,
3269 but WITHOUT ANY WARRANTY; without even the implied warranty of
3270 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3271 GNU General Public License for more details.
3273 You should have received a copy of the GNU General Public License
3274 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3279 paragraph-separate: "[
\f]*$"