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 `without-compress-info' has been generalized,
38 and renamed to `without-compress-install'. It now prevents compression
39 of _any_ files during installation.
41 ** The configure option --with-crt-dir has been removed.
42 It is no longer needed, as the crt*.o files are no longer linked
45 ** Directories passed to configure option `--enable-locallisppath' are
46 no longer created during installation.
48 ** Emacs can be compiled with zlib support. If this library is present
49 (which it normally is on most systems), the function
50 `zlib-decompress-region' becomes available, which can decompress gzip-
51 and zlib-format compressed data.
54 ** Emacs for NS (OSX, GNUStep) can be built with ImageMagick support.
55 pkg-config is required to find ImageMagick libraries.
58 * Startup Changes in Emacs 24.4
61 * Changes in Emacs 24.4
63 ** Key ? also describes prefix bindings like C-h.
66 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
67 because it affects caching of paragraph scanning results as well.
70 ** `apropos-variable' is now `apropos-user-option'
71 `apropos-user-option' shows all user options while `apropos-variable'
72 shows all variables. When called with a universal prefix argument,
73 the two commands swap their behaviors. When `apropos-do-all' is
74 non-nil, they output the same results.
77 ** `eval-defun' on an already defined defcustom calls the :set function,
80 ** If the new variable `enable-dir-local-variables' is nil,
81 directory local variables are ignored. May be useful for some modes
82 that want to ignore directory-locals while still respecting file-locals.
84 ** The option `set-mark-default-inactive' has been deleted.
85 This unfinished feature was introduced by accident in Emacs 23.1;
86 simply disabling Transient Mark mode does the same thing.
88 ** `initial-buffer-choice' can now specify a function to set up the
91 ** `remember-notes' creates a buffer whose content is saved on kill-emacs.
92 You may think of it as a *scratch* buffer whose content is preserved.
93 In fact, it was designed as a replacement for *scratch* buffer and can
94 be used that way by setting `initial-buffer-choice' to `remember-notes'
95 and `remember-notes-buffer-name' to "*scratch*". Without the second
96 change, *scratch* buffer will still be there for notes that do not
99 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
101 ** ACL support has been added.
103 *** Emacs preserves the ACL entries of files when backing up.
105 *** New functions `file-acl' and `set-file-acl' get and set the ACL
106 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
107 libacl. On MS-Windows, the NT Security APIs are used to emulate the
108 POSIX ACL interfaces.
110 ** New option `scroll-bar-adjust-thumb-portion'.
111 Available only on X, this option allows to control over-scrolling
112 using the scroll bar (i.e. dragging the thumb down even when the end
113 of the buffer is visible).
115 ** New function `add-face-text-property' has been added, which can be
116 used to conveniently prepend/append new face attributes to text.
118 ** In compiled Lisp files, the header no longer includes a timestamp.
120 ** Multi-monitor support has been added.
122 *** New functions `display-monitor-attributes-list' and
123 `frame-monitor-attributes' can be used to obtain information about
124 each physical monitor on multi-monitor setups.
126 *** The functions `display-pixel-width' and `display-pixel-height' now
127 behave consistently among the platforms: they return the pixel width
128 or height for all physical monitors associated with the given display
129 as just they were on X11. To get information for each physical
130 monitor, use the new functions above. Similar notes also apply to
131 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
132 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
134 ** New macro `alternatives-define' can be used to define generic commands.
135 Generic commands are interactive functions whose implementation can be
136 selected among several alternatives, as a matter of user preference.
138 ** The blink cursor stops blinking after 10 blinks (default) on X and NS.
139 You can change the default by customizing the variable blink-cursor-blinks.
140 Also timers for blinking are stopped when no blinking is done, so Emacs does
141 not consume CPU cycles.
143 ** New command `frameset-to-register' is now bound to `C-x r f', replacing
144 `frame-configuration-to-register'. It offers similar functionality, plus
145 some enhancements, like the ability to restore deleted frames. Command
146 `frame-configuration-to-register' is still available, but unbound.
149 * Editing Changes in Emacs 24.4
151 ** `split-window' is no longer a command, just a non-interactive function.
152 As a command it was a special case of `split-window-below', and as such
153 superfluous. After being reimplemented in Lisp, its interactive form
154 was mistakenly retained.
156 ** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
157 bound to <f11> and M-<f10>, respectively.
159 ** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
163 ** New option `visual-order-cursor-movement'.
164 If this is non-nil, cursor motion with arrow keys will follow the
165 visual order of characters on the screen: <left> always moves to the
166 left, <right> always moves to the right, disregarding the surrounding
167 bidirectional context.
169 ** New command `kmacro-to-register' to store keyboard macros in registers.
173 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
174 You can pick the name of the function and the variables with `C-x 4 a'.
177 * Changes in Specialized Modes and Packages in Emacs 24.4
179 ** The debugger's `e' command evaluates the code in the context at point.
180 This includes using the lexical environment at point, which means that
181 `e' now lets you access lexical variables as well.
183 ** `eshell' now supports visual subcommands and options
184 Eshell has been able to handle "visual" commands (interactive,
185 non-line oriented commands such as top that require display
186 capabilities not provided by eshell) by running them in an Emacs
187 terminal emulator. See `eshell-visual-commands'.
189 This feature has been extended to subcommands and options that make a
190 usually line-oriented command a visual command. Typical examples are
191 "git log" and "git <command> --help" which display their output in a
192 pager by default. See `eshell-visual-subcommands' and
193 `eshell-visual-options'.
195 ** If your Emacs is compiled with libxml2 support, you can use the new
196 built-in web browser `eww'.
198 ** `remember' can now store notes in separates files
199 You can use the new function `remember-store-in-files' within the
200 `remember-handler-functions' option.
202 See `remember-data-directory' and `remember-directory-file-name-format'
203 for new options related to this function.
205 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
207 ~/.emacs.d/timelog replaces ~/.timelog
208 ~/.emacs.d/vip replaces ~/.vip
209 ~/.emacs.d/viper replaces ~/.viper
210 ~/.emacs.d/ido.last replaces ~/.ido.last
211 ~/.emacs.d/kkcrc replaces ~/.kkcrc
212 ~/.emacs.d/quickurls replaces ~/.quickurls
213 ~/.emacs.d/idlwave replaces ~/.idlwave
214 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
215 ~/.emacs.d/places replaces ~/.emacs-places
216 ~/.emacs.d/shadows replaces ~/.shadows
217 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
218 ~/.emacs.d/strokes replaces ~/.strokes
219 ~/.emacs.d/notes replaces ~/.notes
220 ~/.emacs.d/type-break replaces ~/.type-break
221 Also the following files used by the now obsolete otodo-mode.el:
222 ~/.emacs.d/todo-do replaces ~/.todo-do
223 ~/.emacs.d/todo-done replaces ~/.todo-done
224 ~/.emacs.d/todo-top replaces ~/.todo-top
227 ** Delphi mode is now called OPascal mode.
228 *** All delphi-* variables and functions have been renamed to opascal-*.
229 *** `delphi-newline-always-indents' is not supported any more.
230 Use `electric-indent-mode' instead.
231 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
233 ** Eldoc Mode works properly in the minibuffer.
235 ** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
237 ** completing-read-multiple's separator can now be a regexp.
238 The default separator is changed to allow surrounding spaces around the comma.
242 *** Battery information via the BSD `apm' utility is now supported.
246 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
248 ** Calendar and Diary
250 *** New faces: `calendar-weekday-header', `calendar-weekend-header',
251 `calendar-month-header'.
253 *** New option `calendar-day-header-array'.
255 *** The variable `calendar-font-lock-keywords' is obsolete.
258 *** New variable `diary-from-outlook-function', used by the command
259 `diary-from-outlook'.
261 ** VC and related modes
263 *** In VC directory mode, `D' displays diffs between VC-controlled
264 whole tree revisions.
266 *** In VC directory mode, `L' lists the change log for the current VC
267 controlled tree in a window.
269 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
270 under current version control system. When called with a prefix
271 argument, you can remove a file from the ignored file list.
275 *** New macro cl-tagbody.
278 *** letf is now just an alias for cl-letf.
282 *** Calc by default now uses the Gregorian calendar for all dates, and
283 uses January 1, 1 AD as its day number 1. Previously Calc used the
284 Julian calendar for dates before September 14, 1752, and it used
285 December 31, 1 BC as its day number 1; the new scheme is more
286 consistent with Calendar's calendrical system and day numbering.
288 *** The new variable `calc-gregorian-switch' lets you configure the
289 date when Calc switches from the Julian to the Gregorian calendar.
290 Nil, the default value, means to always use the Gregorian calendar.
291 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
294 *** Support for ISO 8601 dates.
298 *** `desktop-auto-save-timeout' defines the number of seconds between
299 auto-saves of the desktop.
301 *** `desktop-restore-frames', enabled by default, allows saving and
302 restoring the frame/window configuration (frameset). Additional options
303 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
304 and `desktop-restore-forces-onscreen' offer further customization.
308 *** New minor mode `dired-hide-details-mode' hides details.
312 *** New option `erc-accidental-paste-threshold-seconds'.
313 If set to a number, this can be used to avoid accidentally paste large
314 amounts of data into the ERC input.
318 *** New option `epa-mail-aliases'.
320 You can set this to a list of alias expansions for keys to use
321 in `epa-mail-encrypt'.
323 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
324 that means: when one of the recipients of the message being encrypted
325 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
327 If one element of the variable's value is ("foo@bar.com"),
328 that means: when one of the recipients of the message being encrypted
329 is `foo@bar.com', ignore that name as regards encryption.
330 This is useful to avoid a query when you have no key for that name.
333 ** New F90 mode option `f90-smart-end-names'.
335 ** Icomplete is a bit more like Ido.
336 *** key bindings to navigate through and select the completions.
337 *** The icomplete-separator is customizable, and its default has changed.
338 *** Removed icomplete-show-key-bindings.
339 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
340 (setq icomplete-with-completion-tables '(internal-complete-buffer))
341 will revert to the old behavior.
345 *** Ido has a manual now.
346 *** `ido-use-virtual-buffers' takes a new value 'auto.
347 *** `ido-decorations' has been slightly extended to give a bit more control.
351 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
352 visit the next image file and the previous image file in the same
353 directory, respectively.
355 *** New commands to show specific frames of multi-frame images.
356 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
357 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
359 *** New commands to speed up, slow down, or reverse animation.
362 *** The command `image-mode-fit-frame' deletes other windows.
363 When toggling, it restores the frame's previous window configuration.
364 It also has an optional frame argument, which can be used by Lisp
365 callers to fit the image to a frame other than the selected frame.
369 *** New face `info-index-match' is used to highlight matches in index
370 entries displayed by `Info-index-next', `Info-virtual-index' and
375 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
376 will cycle through faces in `hi-lock-face-defaults' without prompting.
379 *** New global command `M-s h .' (`highlight-symbol-at-point')
380 highlights the symbol found near point without prompting,
381 using the next face automatically.
383 ** Search and Replace
385 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
386 starts a symbol (identifier) incremental search forward with the
387 symbol found near point added to the search string initially.
389 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
390 and adds it to the search string.
392 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
393 between nil and the value of the option `search-invisible' (or `open'
396 *** `query-replace' skips invisible text when `search-invisible' is nil,
397 and opens overlays with hidden text when `search-invisible' is `open'.
400 *** By default, prefix arguments do not now terminate Isearch mode.
401 Set `isearch-allow-prefix' to nil to restore old behavior.
403 *** More Isearch commands accept prefix arguments, namely
404 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
407 *** Word search now matches whitespace at the beginning/end
408 of the search string if it contains leading/trailing whitespace.
409 In an incremental word search or when using a non-nil LAX argument
410 of `word-search-regexp', the lax matching can also match part of
411 the first word (in addition to the lax matching of the last word).
412 The same rules are now applied to the symbol search with the difference
413 that it matches symbols, and non-symbol characters between symbols.
415 ** MH-E has been updated to MH-E version 8.5.
416 See MH-E-NEWS for details.
419 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
420 Customize `unrmail-mbox-format' to change this.
423 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
424 of how Rmail displays non-MIME messages.
427 ** New function `ses-rename-cell' to give SES cells arbitrary names.
429 ** trace-function was largely rewritten.
430 New features include:
431 - no prompting for the destination buffer, unless a prefix-arg was used.
432 - additionally to prompting for a destination buffer, when a prefix-arg is
433 used, the user can enter a "context", i.e. Lisp expression whose value at the
434 time the function is entered/exited will be printed along with the function
435 name and arguments. Useful to trace the value of (current-buffer) or
436 (point) when the function is invoked.
438 ** New command `delete-duplicate-lines' has new types of operation:
439 When its arg ADJACENT is non-nil (when called interactively with C-u C-u)
440 it works like the utility `uniq'. Otherwise by default it deletes
441 duplicate lines everywhere in the region without regard to adjacency.
442 When its arg KEEP-BLANKS is non-nil (when called interactively with
443 C-u C-u C-u), duplicate blank lines are preserved.
445 ** New `cycle-spacing' command allows cycling between having just one
446 space, no spaces, or reverting to the original spacing. Like
447 `just-one-space' command it can handle or ignore newlines and
448 leave different number of spaces.
450 ** Todo mode has been rewritten and enhanced.
451 New features include:
452 - support for multiple todo files and archive files of done items;
453 - renaming, reordering, moving, merging, and deleting categories;
454 - sortable tabular summaries of categories and the types of items they contain;
455 - cross-category lists of items filtered by specific criteria;
456 - more fine-grained interaction with the Emacs diary, by being able to decide
457 for each todo item whether it appears in the Fancy Diary display;
458 - highly flexible new item insertion and item editing;
459 - moving items between categories, storing done items in their category or in
460 archive files, undoing or unarchiving done items;
461 - reprioritizing items by inputting a numerical priority;
462 - extensive customizability of operation and display, including numerous faces.
463 The Todo mode user manual describes all commands and most user options.
464 To support some of these features, a new file format is used, which is
465 incompatible with the old format; however, you can convert old todo and done
466 item files to the new format on initializing the first new todo file, or at any
467 later time with the provided conversion command. The old version of
468 todo-mode.el has been made obsolete and renamed otodo-mode.el.
472 *** The experimental url syntax for remote file names is withdrawn.
475 *** New connection method "adb", which allows to access Android
476 devices by the Android Debug Bridge. The variable `tramp-adb-program'
477 can be used to adapt the path of the "adb" program, if needed.
479 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
480 "scpc" and "rsyncc" are discontinued. The ssh option
481 "ControlMaster=auto" is set automatically in all ssh-based methods,
485 *** Handlers for `file-acl' and `set-file-acl' for remote machines
486 which support POSIX ACLs.
489 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
490 for remote machines which support filesystem notifications.
494 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
496 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
500 *** The commands `woman-default-faces' and `woman-monochrome-faces'
501 are obsolete. Customize the `woman-*' faces instead.
505 *** Added Eshell-Tramp module
506 External su and sudo commands are now the default; the internal,
507 Tramp-using variants can still be used by enabling the eshell-tramp
510 ** New term.el option `term-suppress-hard-newline'.
512 ** Obsolete packages:
514 *** longlines.el is obsolete; use visual-line-mode instead.
519 *** terminal.el is obsolete; use term.el instead.
521 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
526 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
529 *** The Info-edit command is obsolete. Editing Info nodes by hand
530 has not been relevant for some time.
534 *** `explicit-bash-args' now always defaults to use --noediting.
535 During initialization, Emacs no longer expends a process to decide
536 whether it is safe to use Bash's --noediting option. These days
537 --noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
540 * New Modes and Packages in Emacs 24.4
542 ** New `superword-mode' in subword.el
543 `superword-mode' overrides the default word motion commands to treat
544 symbol_words as a single word, similar to what `subword-mode' does and
545 using the same internal functions.
547 ** New nadvice.el package offering lighter-weight advice facilities.
549 - add-function/remove-function which can be used to add/remove code on any
550 function-carrying place, such as process-filters or `<foo>-function' hooks.
551 - advice-add/advice-remove to add/remove a piece of advice on a named function,
552 much like `defadvice' does.
554 ** New frameset.el package.
555 It provides a set of operations to save a frameset (the state of all
556 or a subset of the existing frames and windows, somewhat similar to a
557 frame configuration), both in-session and persistently, and restore it
558 at some point in the future.
561 ** The package filenotify.el provides an interface for file system
562 notifications. It requires, that Emacs is compiled with one of the
563 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
566 * Incompatible Lisp Changes in Emacs 24.4
568 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
570 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
571 Some languages match those as »...« and others as «...» so better stay neutral.
573 ** The default file coding for Emacs Lisp files is now utf-8.
574 (See file-coding-system-alist.) In most cases, this change is transparent, but
575 files that contain unusual characters without specifying an explicit coding
576 system may fail to load with obscure errors.
577 You should either convert them to utf-8 or add an explicit `coding:' cookie.
579 ** overriding-terminal-local-map does not replace the local keymaps any more.
580 It used to disable the minor mode, major mode, and text-property keymaps,
581 whereas now it simply has higher precedence.
583 ** Default process filters and sentinels are not nil any more.
584 Instead they default to a function which does what the nil value used to do.
586 ** `read-event' does not return decoded chars in ttys any more.
587 Just as was the case in Emacs-22 and before, decoding of tty input according to
588 keyboard-coding-system is not performed in read-event any more. But contrary
589 to that past, it is still done before input-decode-map/function-key-map/...
591 ** Removed inhibit-local-menu-bar-menus.
593 ** frame-local variables that affect redisplay do not work any more.
594 More specifically, the redisplay does not bother to check for a frame-local
595 value when looking up variables.
597 ** nil and "unbound" are indistinguishable in symbol-function.
598 `symbol-function' never signals `void-function' any more.
599 `fboundp' returns non-nil if the symbol was `fset' to nil.
601 ** `defadvice' does not honor the `freeze' flag and cannot advise
602 special-forms any more.
604 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
605 VAR was bound to nil which was not tremendously useful and just lead to
606 spurious warnings about an unused var.
608 ** The return value of `backup-buffer' has changed.
609 The second argument is no longer an SELinux context, instead it is an
610 alist of extended attributes as returned by the new function
611 `file-extended-attributes'. The attributes can be applied to another
612 file using `set-file-extended-attributes'.
614 ** `visited-file-modtime' now returns -1 for nonexistent files.
615 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
616 in the presence of files with negative time stamps.
618 * Lisp Changes in Emacs 24.4
621 ** New function `define-error'.
623 ** New hook `tty-setup-hook'.
626 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
628 ** Obsoleted functions:
631 *** `lisp-complete-symbol'
633 *** `minibuffer-completion-contents'
634 *** `isearch-nonincremental-exit-minibuffer'
635 *** `isearch-filter-visible'
636 *** `generic-make-keywords-list'
638 ** `with-wrapper-hook' is obsoleted by `add-function'.
639 The few hooks that used with-wrapper-hook are replaced as follows:
640 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
641 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
642 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
644 ** `split-string' now takes an optional argument TRIM.
645 The value, if non-nil, is a regexp that specifies what to trim from
646 the start and end of each substring.
648 ** `get-upcase-table' is obsoleted by the new `case-table-get-table'.
650 ** Support for filesystem notifications.
651 Emacs now supports notifications of filesystem changes, such as
652 creation, modification, and deletion of files. This requires the
653 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
654 MS-Windows systems, this is supported for Windows XP and newer
657 ** Changes in autorevert.el
660 *** If Emacs is compiled with file notification support, notifications
661 are used instead of checking the time stamp of the files. You can
662 disable this by setting the user option `auto-revert-use-notify' to
663 nil. Alternatively, a regular expression of directories to be
664 excluded from file notifications can be specified by
665 `auto-revert-notify-exclude-dir-regexp'.
668 *** The new user option `auto-revert-remote-files' enables reversion
669 of remote files when set to non-nil.
673 *** The function `face-spec-set' is now analogous to `setq' for face specs.
674 Its third arg now accepts values specifying exactly which face spec to
675 set (defface, custom, or user spec), and it directly sets the relevant
676 property using the supplied face spec.
678 *** Face specs set via Custom themes now replace the `defface' spec
679 rather than inheriting from it (as do face specs set via Customize).
681 *** New face characteristic (supports :underline (:style wave))
682 specifies whether or not the terminal can display a wavy line.
687 *** `image-animated-p' is now `image-multi-frame-p'.
688 It returns non-nil for any image that contains multiple frames,
689 whether or not it specifies a frame delay.
692 *** When animating images that do not specify a frame delay,
693 Emacs uses `image-default-frame-delay'.
696 *** New functions `image-current-frame' and `image-show-frame' for getting
697 and setting the current frame of a multi-frame image.
699 *** You can change the speed of animated images.
701 ** Changes in encoding and decoding of text
704 *** New coding-system `prefer-utf-8'.
705 This is like `undecided' but prefers UTF-8 on decoding if the text to
706 be decoded does not contain any invalid UTF-8 sequences. On encoding,
707 any non-ASCII characters are automatically encoded as UTF-8.
710 *** New attributes of coding-systems whose type is `undecided'.
711 Two new attributes, `:inhibit-null-byte-detection' and
712 `:inhibit-iso-escape-detection', determine how to detect encoding of
713 text that includes null bytes and ISO-2022 escape sequences,
714 respectively. Each of these attributes can be either nil, zero, or
715 t. If it is t, decoding text ignores null bytes and, respectively,
716 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
717 with no-conversion and ISO-2022 sequences cause Emacs to assume the
718 text is encoded in one of the ISO-2022 encodings, such as
719 iso-2022-7bit. If the value is zero, Emacs consults the variables
720 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
722 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
723 UTF-8 encoding and decoding, whenever possible.
725 These attributes are only meaningful for coding-systems of type
726 `undecided'. (The type of a coding-system is determined by its
727 `:coding-type' attribute and can be accessed by calling the
728 `coding-system-type' function.)
730 ** The function `set-visited-file-modtime' now accepts a 0 or -1 argument
731 with the same interpretation as the returned value of `visited-file-modtime'.
733 ** time-to-seconds is not obsolete any more.
734 ** New functions special-form-p and macrop.
735 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
736 text-property on the first char.
738 ** The `defalias-fset-function' property lets you catch calls to defalias
739 and redirect them to your own function instead of `fset'.
741 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
742 When you edit DIR/FILE, Emacs normally creates a symbolic link
743 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
744 is being edited. Formerly, if there was already a non-symlink file
745 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
746 through DIR/.#FILE.9. These fallbacks have been removed, so that
747 Emacs now no longer locks DIR/FILE in that case.
749 On file systems that do not support symbolic links, the lock is now a
750 regular file with contents being what would have been in the symlink.
752 ** The 9th element returned by `file-attributes' is now unspecified.
753 Formerly, it was t if the file's gid would change if file were deleted
754 and recreated. This value has been inaccurate for years on many
755 platforms, and nobody seems to have noticed or cared.
757 ** The function `file-ownership-preserved-p' now has an optional
758 argument GROUP which causes it check for file group too. This can be
759 used in place of the 9th element of `file-attributes'.
761 ** New functions `group-gid' and `group-real-gid'.
763 ** The 6th argument to `copy-file' has been renamed to
764 `preserve-extended-attributes' as it now handles both SELinux context
767 ** The `common-substring' argument of display-completion-list is obsolete.
768 Either use `completion-all-completions' which already returns highlighted
769 strings (including for partial or substring completion) or call
770 `completion-hilit-commonality' to add the highlight.
772 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
774 *** The package descriptor and name of global variables, constants,
775 and functions should be separated by two hyphens if the symbol is not
776 meant to be used by other packages.
779 * Changes in Emacs 24.4 on Non-Free Operating Systems
781 ** The procedure for building Emacs on MS-Windows has changed.
782 It is now built by running the same configure script as on all other
783 platforms. This requires the MSYS environment and MinGW development
784 tools. See the updated instructions in nt/INSTALL for details.
786 Using the Posix configure script and Makefile's also means a change in
787 the directory structure of the Emacs installation on Windows. It is
788 now the same as on GNU and Unix systems. In particular, the auxiliary
789 programs, such as cmdproxy.exe and hexl.exe, are in
790 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
791 version), version-independent site-lisp is in share/emacs/site-lisp,
792 version-specific Lisp files are in share/emacs/VERSION/lisp and in
793 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
794 files are in share/emacs/VERSION/etc. (Emacs knows about all these
795 directories and will find the files in there automatically; there's no
796 need to set any variables due to this change.)
799 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
800 The backtrace is written to the 'emacs_backtrace.txt' file in the
801 directory where Emacs was running.
804 ** The variable `buffer-file-type' is no longer supported.
805 Setting it has no effect, and %t in the mode-line format is ignored.
806 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
807 modifying it has no effect.
810 ** Lock files now work on MS-Windows.
811 This allows to avoid losing your edits if the same file is being
812 edited in another Emacs session or by another user. See the node
813 "Interlocking" in the Emacs User Manual for the details. To disable
814 file locking, customize `create-lockfiles' to nil.
816 ** Improved fullscreen support on Mac OS X.
817 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
818 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
819 native is the default.
822 * Installation Changes in Emacs 24.3
824 ** The default X toolkit is now Gtk+ version 3.
825 If you don't pass `--with-x-toolkit' to configure, or if you use
826 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
827 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
828 You can explicitly require a specific version by passing
829 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
831 ** New configure option `--enable-link-time-optimization', to utilize
832 an appropriate feature provided by GCC since version 4.5.0.
834 ** New configure option `--without-all' to disable most of the optional
835 features (image support, etc.) that are normally enabled by default.
837 ** New configure option `--enable-gcc-warnings' (for developing/debugging
838 Emacs). If building with GCC, this enables compile-time checks that
839 warn/give errors about possibly-questionable C code. On a recent GNU
840 system there should be no warnings; on older and on non-GNU systems
841 the results may be useful to developers.
843 ** The configure option `--enable-use-lisp-union-type' has been
844 renamed to `--enable-check-lisp-object-type', as the resulting
845 Lisp_Object type no longer uses a union to implement the compile time
846 check that this option enables.
848 ** The configure option `--disable-maintainer-mode' has been removed,
849 as it was confusingly-named and rarely useful.
851 ** The configure options `--program-prefix', `--program-suffix', and
852 `--program-transform-name' apply to more than just the installed
853 binaries. Now they also affect the man pages, icons, and the
854 etc/emacs.desktop file; but not the info pages, since this would break
855 links between the various manuals.
857 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
858 overwriting "emacs" in the installation bin/ directory with a link
861 ** Emacs uses libtinfo in preference to libncurses, if available.
863 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
864 /usr/pkg/lib to the linker search path. You must add them yourself if
867 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
868 (from the bin and libexec directories, respectively). The former is
869 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
872 * Startup Changes in Emacs 24.3
874 ** Emacs no longer searches for `leim-list.el' files beneath the standard
875 lisp/ directory. There should not be any there anyway. If you have
876 been adding them there, put them somewhere else; e.g., site-lisp.
878 ** The `--no-site-lisp' command line option now works for Nextstep builds.
881 * Changes in Emacs 24.3
885 *** `C-h f' (`describe-function') can now perform autoloading.
886 When this command is called for an autoloaded function whose docstring
887 contains a key substitution construct, that function's library is
888 automatically loaded, so that the documentation can be shown
889 correctly. To disable this, set `help-enable-auto-load' to nil.
891 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
892 even after their associated libraries have been loaded (and the
893 autoloads have been redefined as functions).
897 *** Images displayed via ImageMagick now support transparency and the
898 :background image specification property.
900 *** When available, ImageMagick support is automatically enabled.
901 It is no longer necessary to call `imagemagick-register-types'
902 explicitly to install ImageMagick image types; that function is called
903 automatically at startup, or when customizing an imagemagick- option.
905 *** Setting `imagemagick-types-inhibit' to t now disables the use of
906 ImageMagick to view images. (You must call `imagemagick-register-types'
907 afterwards if you do not use customize to change this.)
909 *** The new variable `imagemagick-enabled-types' also affects which
910 ImageMagick types are treated as images. The function
911 `imagemagick-filter-types' returns the list of types that will be
914 *** ImageMagick images now support the :max-width and :max-height
917 *** Some data types aren't auto-detected by ImageMagick. Adding
918 :format to `create-image' may help if the content type is in the
919 new variable `image-format-suffixes'.
923 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
924 next and previous path separator, respectively.
926 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
927 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
928 non-nil before enabling the mode.
932 *** New option `mode-line-default-help-echo' specifies the help text
933 (shown in a tooltip or in the echo area) for any part of the mode line
934 that does not have its own specialized help text.
936 *** You can now click mouse-3 in the coding system indicator to invoke
937 `set-buffer-file-coding-system'.
941 *** emacsclient now obeys string values for `initial-buffer-choice',
942 if it is told to open a new frame without specifying any file to visit
943 or expression to evaluate.
945 *** New option `server-auth-key' specifies a shared server key.
947 ** Emacs now generates backtraces on fatal errors.
948 On encountering a fatal error, Emacs now outputs a textual description
949 of the fatal signal, and a short backtrace on platforms like glibc
950 that support backtraces.
952 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
953 This minor mode replaces `toggle-read-only', which is now obsolete.
955 ** Most `y-or-n' prompts now allow you to scroll the selected window.
956 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
957 respectively, without exiting from the prompt.
959 ** In the Package Menu, newly-available packages are listed as "new",
960 and sorted above the other "available" packages by default.
962 ** If your Emacs was built from a bzr checkout, the new variable
963 `emacs-bzr-version' contains information about the bzr revision used.
965 ** New option `create-lockfiles' specifies usage of lockfiles.
966 It defaults to t. Changing it to nil inhibits the creation of lock
967 files (use this with caution).
969 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
970 variables on remote hosts.
972 ** The entry for PCL-CVS has been removed from the Tools menu.
973 The PCL-CVS commands are still available via the keyboard.
975 ** Using "unibyte: t" in Lisp source files is obsolete.
976 Use "coding: raw-text" instead.
978 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
979 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
980 The previous binding, introduced in Emacs 24.1, was a mistake, because
981 `C-c LETTER' bindings are reserved for user customizations.
983 ** Internationalization
985 *** New language environment: Persian.
987 *** New input method `vietnamese-vni'.
989 ** Nextstep (GNUstep / Mac OS X) port
991 *** Support for fullscreen and the frame parameter fullscreen.
993 *** A file dialog is used for open/save operations initiated from the
997 * Editing Changes in Emacs 24.3
999 ** Search and Replace
1001 *** Non-regexp Isearch now performs "lax" space matching.
1002 Each sequence of spaces in the supplied search string may match any
1003 sequence of one or more whitespace characters, as specified by the
1004 variable `search-whitespace-regexp'. (This variable is also used by a
1005 similar existing feature for regexp Isearch.)
1007 *** New Isearch command `M-s SPC' toggles lax space matching.
1008 This applies to both ordinary and regexp Isearch.
1010 *** New option `replace-lax-whitespace'.
1011 If non-nil, `query-replace' uses flexible whitespace matching too.
1014 *** Global `M-s _' starts a symbol (identifier) incremental search,
1015 and `M-s _' in Isearch toggles symbol search mode.
1016 `M-s c' in Isearch toggles search case-sensitivity.
1018 ** Navigation commands
1020 *** New binding `M-g c' for `goto-char'.
1022 *** New binding `M-g TAB' for `move-to-column'.
1024 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1025 interactively with no prefix arg. Previously, it moved to column 1.
1027 ** New option `yank-handled-properties' allows processing of text
1028 properties on yanked text, in ways that are more general than just
1029 removing them (as is done by `yank-excluded-properties').
1031 ** New option `delete-trailing-lines' specifies whether
1032 M-x delete-trailing-whitespace should delete trailing lines at the end
1033 of the buffer. It defaults to t.
1035 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1037 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1038 `ucs-insert' is now an obsolete alias for `insert-char'.
1040 ** The `z' key no longer has a binding in most special modes.
1041 It used to be bound to `kill-this-buffer', but `z' is too easy to
1044 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1045 It copies the region-rectangle as the last rectangle kill.
1049 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1051 *** New option `register-separator' specifies the register containing
1052 the text to put between collected texts for use with
1053 M-x append-to-register and M-x prepend-to-register.
1056 * Changes in Specialized Modes and Packages in Emacs 24.3
1058 ** Common Lisp emulation (CL)
1060 *** CL's main entry is now (require 'cl-lib).
1061 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1062 i.e., all its definitions have the "cl-" prefix (and internal definitions
1063 use the "cl--" prefix).
1065 If `cl' provided a feature under the name `foo', then `cl-lib'
1066 provides it under the name `cl-foo' instead; with the exceptions of the
1067 few `cl' definitions that had to use `foo*' to avoid conflicts with
1068 pre-existing Elisp entities. These have been renamed to `cl-foo'
1069 rather than `cl-foo*'.
1071 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1072 provide the old, non-prefixed names. Some exceptions are listed below:
1074 *** `cl-flet' is not like `flet' (which is deprecated).
1075 Instead it obeys the behavior of Common-Lisp's `flet'.
1076 In particular, in cl-flet function definitions are lexically scoped,
1077 whereas in flet the scoping is dynamic.
1079 *** `cl-labels' is slightly different from `labels'.
1080 The difference is that it relies on the `lexical-binding' machinery
1081 (as opposed to the `lexical-let' machinery used previously) to capture
1082 definitions in closures, so such closures will only work if `lexical-binding'
1085 *** `cl-letf' is not exactly like `letf'.
1086 The only difference is in details that relate to some deprecated usage
1087 of `symbol-function' in place forms.
1089 *** `progv' was rewritten to use the `let' machinery.
1090 A side effect is that variables without corresponding values are bound
1091 to nil rather than being made unbound.
1093 *** The following methods of extending `setf' are obsolete
1094 (use features from gv.el instead):
1095 `define-modify-macro' (use `gv-letplace')
1096 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1097 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1098 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1102 *** Changes are now highlighted using the same color scheme as in
1103 modern VCSes. Deletions are displayed in red (new faces
1104 `diff-refine-removed' and `smerge-refined-removed', and new definition
1105 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1106 and `smerge-refined-added', and new definition of `diff-added').
1108 *** The variable `diff-use-changed-face' defines whether to use the
1109 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1110 changes in context diffs.
1112 *** The new command `diff-delete-trailing-whitespace' removes trailing
1113 whitespace introduced by a diff.
1115 ** Ediff now uses the same color scheme as Diff mode.
1119 A new version of python.el, which provides several new features, including:
1120 per-buffer shells, better indentation, Python 3 support, and improved
1121 shell-interaction compatible with iPython (and virtually any other
1124 *** Some user options have been replaced/renamed, including (old -> new):
1125 **** python-indent -> python-indent-offset
1126 **** python-guess-indent -> python-indent-guess-indent-offset
1127 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1128 **** python-use-skeletons -> python-skeleton-autoinsert
1130 *** Some user options have been removed, including:
1132 **** `python-indent-string-contents': Strings are never indented.
1134 **** `python-honour-comment-indentation':
1135 Comments are always considered as indentation markers.
1137 **** `python-continuation-offset': Indentation is automatically
1138 calculated in a pep8 compliant way depending on the context.
1140 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1141 Have no direct mapping as the shell interaction is completely different.
1143 **** `python-python-command', `python-jython-command':
1144 Replaced by `python-shell-interpreter'.
1146 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1147 `python-pdbtrack-minor-mode-string', `python-source-modes':
1150 *** Some commands have been replaced (old -> new):
1151 **** python-insert-class -> python-skeleton-class
1152 **** python-insert-def -> python-skeleton-def
1153 **** python-insert-for -> python-skeleton-for
1154 **** python-insert-if -> python-skeleton-if
1155 **** python-insert-try/except -> python-skeleton-try
1156 **** python-insert-try/finally -> python-skeleton-try
1157 **** python-insert-while -> python-skeleton-while
1158 **** python-find-function -> python-nav-jump-to-defun
1159 **** python-next-statement -> python-nav-forward-sentence
1160 **** python-previous-statement -> python-nav-backward-sentence
1161 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1162 **** python-end-of-defun-function -> python-nav-end-of-defun
1163 **** python-send-buffer -> python-shell-send-buffer
1164 **** python-send-defun -> python-shell-send-defun
1165 **** python-send-region -> python-shell-send-region
1166 **** python-send-region-and-go -> emulate with python-shell-send-region
1167 and python-shell-switch-to-shell
1168 **** python-send-string -> python-shell-send-string
1169 **** python-switch-to-python -> python-shell-switch-to-shell
1170 **** python-describe-symbol -> python-eldoc-at-point
1174 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1176 *** The D-Bus object manager interface is implemented.
1178 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1179 if their value does not fit into Emacs's integer range.
1181 *** The function `dbus-call-method' is now non-blocking.
1182 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1184 *** Signals can also be sent as unicast messages.
1186 *** The argument list of `dbus-register-signal' has been extended,
1187 according to the new match rule types of D-Bus.
1189 *** `dbus-init-bus' supports private connections.
1191 *** There is a new function `dbus-setenv'.
1193 ** `desktop-path' no longer includes the "." directory.
1194 Desktop files are now located in ~/.emacs.d by default.
1198 *** `dired-do-async-shell-command' executes each file sequentially
1199 if the command ends in `;' (when operating on multiple files).
1200 Otherwise, it executes the command on each file in parallel.
1202 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1203 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1206 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1207 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1208 mark/unmark/flag all files in the active region.
1210 *** The minibuffer default for `=' (`dired-diff') has changed.
1211 It is now the backup file for the file at point, if one exists.
1212 In Transient Mark mode the default is the file at the active mark.
1214 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1215 The global binding for `M-=', `count-words-region' is in effect.
1219 *** New module "notifications", which can send a notification when you
1220 receive a private message or your nickname is mentioned.
1222 *** ERC will look up server/channel names via auth-source and use any
1225 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1226 only applies to messages sent by lurkers.
1228 ** reStructuredText mode
1230 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1231 fontification, comment handling, and customization have all been revised
1234 *** Support for `imenu' and `which-function-mode'.
1236 *** The reStructuredText syntax is more closely covered.
1237 Sphinx support has been improved.
1239 *** `rst-insert-list' inserts new list or continues existing lists.
1241 *** A negative prefix argument always works for `rst-adjust'.
1243 *** The window configuration is reset after displaying a TOC.
1245 *** The constant `rst-version' describes the rst.el package version.
1249 *** Support for percent literals and recognition of regular expressions
1250 in method calls without parentheses with more methods, including Cucumber
1253 *** Improved syntax highlighting and indentation.
1255 *** New command `ruby-toggle-block', bound to `C-c {'.
1257 *** Some non-standard keybindings/commands have been removed:
1259 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1261 **** `ruby-mark-defun'; use `mark-defun'.
1263 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1264 appropriate settings for the variables `beginning-of-defun-function'
1265 and `end-of-defun-function'.
1267 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1268 `reindent-then-newline-and-indent' and `newline' have been removed.
1270 ** Shell Script mode
1272 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1274 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1276 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1280 *** The free software compiler GHDL is supported (and now the default).
1282 *** Support for the VHDL-AMS packages has been added/updated.
1284 *** Updated to the 2002 revision of the VHDL standard.
1286 *** Accepts \r and \f as whitespace.
1290 *** The faces used by Apropos are now directly customizable.
1291 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1292 see the `apropos' Custom group for details.
1294 *** The old options whose values specified faces to use have been removed
1295 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1299 *** This package has been rewritten to use Tabulated List mode.
1301 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1302 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1306 *** Algebraic simplification mode is now the default.
1307 To restrict to the limited simplifications given by the former
1308 default simplification mode, use `m I'.
1312 *** You can customize the header text that appears above each calendar month.
1313 See the variable `calendar-month-header'.
1315 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1317 *** The calendars produced by cal-html include holidays.
1318 Customize `cal-html-holidays' to change this.
1322 *** The major modes from the parser generators "Bovine" and "Wisent"
1323 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1324 are in `auto-mode-alist', and the corresponding manuals are included.
1328 **** Menu support for the "Configuration" feature. This allows users to
1329 choose the active configuration (such as debug or install) from the menu.
1331 **** New command `ede-set' to interactively set project-local variables.
1333 **** Support for compiling, debugging, and running in "generic" projects.
1335 **** Autoconf editing support for M4 macros with complex arguments.
1337 **** Compilation support for the "linux" project type.
1339 **** "simple" projects have been removed; use "generic" projects instead.
1343 **** Support for parsing #include statements inside a namespace in C/C++.
1345 **** Improved support for 'extern "C"' declarations in C/C++.
1347 **** The ability to ignore more common special C/C++ preprocessor symbols,
1348 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1349 If available, include cdefs.h as an additional source of preprocessor symbols.
1351 **** Improved C/C++ function pointer parsing.
1353 **** In Python, support for converting imports to include file names.
1355 **** Ability to dynamically determine the Python load path.
1357 **** Support for the Python 'WITH' and 'AT' keywords.
1359 **** Improved tooltip completion.
1363 **** The SRecode manual is now included.
1365 **** Tag generation supports constructor/destructor settings and system
1366 include differentiation.
1368 **** Addition of 'Framework' support: Frameworks are specified when a
1369 particular kind of library (such as Android) is needed in a common language
1372 **** Support for nested templates and let variables override based on priority.
1374 **** Support for merging tables from multiple related modes, such as
1375 default -> c++ -> arduino.
1377 ** Compile has a new option `compilation-always-kill'.
1381 *** `custom-reset-button-menu' now defaults to t.
1383 *** Non-option variables are never matched in `customize-apropos' and
1384 `customize-apropos-options' (i.e., the prefix argument does nothing for
1385 these commands now).
1389 *** The variables `term-default-fg-color' and `term-default-bg-color'
1390 are now deprecated in favor of the customizable face `term'.
1392 *** You can customize how to display ANSI terminal colors and styles
1393 by customizing the corresponding `term-color-<COLOR>',
1394 `term-color-underline' and `term-color-bold' faces.
1398 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1400 *** Remote processes are now also supported on remote MS-Windows hosts.
1404 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1405 Previously, this slot stored semicolon-separated attribute-value pairs
1406 appended to some imap URLs, but this is not compatible with RFC 3986.
1407 So now the `filename' slot stores the entire path and query components,
1408 and the `attributes' slot is always nil.
1410 *** New function `url-encode-url' for encoding a URI string.
1411 The `url-retrieve' function now uses this to encode its URL argument,
1412 in case that is not properly encoded.
1414 *** New command `url-cookie-list' displays all the current cookies, and
1415 allows deleting selected cookies.
1417 ** notifications.el supports now version 1.2 of the Notifications API.
1418 The function `notifications-get-capabilities' returns the supported
1421 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1422 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1423 `flymake-warning-bitmap'.
1425 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1426 specifying URL types that should be converted to remote file names at
1427 the FFAP prompt. The default is now '("ftp").
1429 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1430 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1432 ** New option `mouse-avoidance-banish-position' specifies where the
1433 `banish' mouse avoidance setting moves the mouse.
1435 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1436 closing brackets to be aligned with the line of the opening bracket.
1438 ** In Proced mode, new command `proced-renice' renices marked processes.
1440 ** New option `async-shell-command-buffer' specifies the buffer to use
1441 for a new asynchronous `shell-command' when the default output buffer
1442 `*Async Shell Command*' is already in use.
1444 ** SQL mode has a new option `sql-db2-escape-newlines'.
1445 If non-nil, newlines sent to the command interpreter will be escaped
1446 by a backslash. The default does not escape the newlines and assumes
1447 that the sql statement will be terminated by a semicolon.
1449 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1450 (and modes that derive from it), sorts the column at point, or the Nth
1451 column if a numeric prefix argument is given.
1453 ** `which-func-modes' now defaults to t, so Which Function mode, when
1454 enabled, applies to all applicable major modes.
1456 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1459 ** Follow mode no longer works by using advice.
1460 The option `follow-intercept-processes' has been removed.
1462 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1464 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1465 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1466 *** semantic-change-hooks -> semantic-change-functions
1467 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1468 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1469 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1470 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1471 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1472 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1473 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1474 *** rcirc-activity-hooks -> rcirc-activity-functions
1475 *** rcirc-print-hooks -> rcirc-print-functions
1476 *** dbus-event-error-hooks -> dbus-event-error-functions
1477 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1478 *** checkdoc-style-hooks -> checkdoc-style-functions
1479 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1480 *** archive-extract-hooks -> archive-extract-hook
1481 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1482 *** hfy-post-html-hooks -> hfy-post-html-hook
1483 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1484 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1485 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1486 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1488 ** Obsolete packages
1491 In most cases, assoc+member+push+delq work just as well.
1492 And in any case it's just a terrible package: ugly semantics, terrible
1493 inefficiency, and not namespace-clean.
1502 * Incompatible Lisp Changes in Emacs 24.3
1504 ** Docstrings starting with `*' no longer indicate user options.
1505 Only variables defined using `defcustom' are considered user options.
1506 The function `user-variable-p' is now an obsolete alias for
1507 `custom-variable-p'.
1509 ** The return values of `defalias', `defun' and `defmacro' have changed,
1510 and are now undefined. For backwards compatibility, `defun' and
1511 `defmacro' currently return the name of the newly defined
1512 function/macro, but this should not be relied upon.
1514 ** `random' by default now returns a different random sequence in
1515 every Emacs run. Use `(random S)', where S is a string, to set the
1516 random seed to a value based on S, in order to get a repeatable
1517 sequence in later calls.
1519 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1520 that substring is inserted literally even if the LITERAL arg is
1521 non-nil, instead of causing an error to be signaled.
1523 ** `select-window' now always makes the window's buffer current.
1524 It does so even if the window was selected before.
1526 ** The function `x-select-font' can return a font spec, instead of a
1527 font name as a string. Whether it returns a font spec or a font name
1528 depends on the graphical library.
1530 ** `face-spec-set' no longer sets frame-specific attributes when the
1531 third argument is a frame (that usage was obsolete since Emacs 22.2).
1533 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1535 ** The CL package's `get-setf-method' function no longer exists.
1536 Generalized variables are now part of core Emacs Lisp, and implemented
1537 differently to the way cl.el used to do it. It is not possible to
1538 define a compatible replacement for `get-setf-method'. See the file
1539 gv.el for internal details of the new implementation.
1541 ** The arguments of `dbus-register-signal' are no longer just strings,
1542 but keywords or keyword-string pairs. The old argument list will
1543 still be supported for Emacs 24.x.
1545 ** Miscellaneous name changes
1546 Some Lisp symbols have been renamed to correct their spelling,
1547 or to be more consistent with standard Emacs terminology.
1549 *** Renamed functions
1550 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1551 **** inactivate-input-method -> deactivate-input-method
1552 **** quail-inactivate -> quail-deactivate
1553 **** robin-inactivate -> robin-deactivate
1554 **** viper-inactivate-input-method -> viper-deactivate-input-method
1555 **** viper-inactivate-input-method-action ->
1556 viper-deactivate-input-method-action
1557 **** ucs-input-inactivate -> ucs-input-deactivate
1560 The old hooks are still supported for backward compatibility, but they
1561 are deprecated and will be removed eventually.
1562 **** input-method-inactivate-hook -> input-method-deactivate-hook
1563 **** robin-inactivate-hook -> robin-deactivate-hook
1564 **** quail-inactivate-hook -> quail-deactivate-hook
1566 *** Renamed variables
1567 **** follow-deactive-menu -> follow-inactive-menu
1568 **** inactivate-current-input-method-function ->
1569 deactivate-current-input-method-function
1571 ** Some obsolete functions, variables, and faces have been removed:
1572 *** `last-input-char', `last-command-char', `unread-command-char'
1573 *** `facemenu-unlisted-faces'
1574 *** `rmail-decode-mime-charset'
1575 *** `iswitchb-read-buffer'
1576 *** `sc-version', `sc-submit-bug-report'
1577 *** `set-char-table-default'
1578 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1579 *** `compile-internal'
1581 *** `mode-line-inverse-video'
1582 *** `follow-mode-off-hook'
1583 *** `cvs-commit-buffer-require-final-newline'
1584 (use `log-edit-require-final-newline' instead)
1585 *** `cvs-changelog-full-paragraphs'
1586 (use `log-edit-changelog-full-paragraphs' instead)
1587 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1588 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1589 *** `vc-master-templates' (use `vc-handled-backends' instead)
1590 *** `vc-checkout-carefully'
1593 * Lisp Changes in Emacs 24.3
1595 ** CL-style generalized variables are now in core Elisp.
1596 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1597 You can define your own generalized variables using `gv-define-simple-setter',
1598 `gv-define-setter', etc.
1600 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1601 This can significantly speed up execution of non-byte-compiled code,
1602 but can also bump into previously unnoticed cyclic dependencies.
1603 These are generally harmless: they will simply cause the macro calls
1604 to be left for later expansion (as before), but will result in a
1605 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1606 You may wish to restructure your code so this does not happen.
1608 ** New sampling-based Elisp profiler.
1609 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1610 When finished, use M-x profiler-stop. The sampling rate can be based on
1611 CPU time or memory allocations.
1613 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1614 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1616 ** New macros `setq-local' and `defvar-local'.
1618 ** Face underlining can now use a wave.
1620 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1621 of `read-regexp' accepts a string ending with a colon and space, and its
1622 second argument DEFAULTS can be a list of strings accessible via `M-n'
1623 in the minibuffer ahead of other hard-coded useful regexp-related values.
1624 More commands use `read-regexp' now to read their regexp arguments.
1628 *** New function `completion-table-with-quoting' to handle completion
1629 in the presence of quoting, such as file completion in shell buffers.
1631 *** New function `completion-table-subvert' to use an existing completion
1632 table, but with a different prefix.
1636 *** New error type and new function `user-error'.
1637 These do not trigger the debugger.
1639 *** New option `debugger-bury-or-kill', saying what to do with the
1640 debugger buffer when exiting debug.
1642 *** Set `debug-on-message' to enter the debugger when a certain
1643 message is displayed in the echo area. This can be useful when trying
1644 to work out which code is doing something.
1646 *** New var `inhibit-debugger', automatically set to prevent accidental
1647 recursive invocations.
1651 *** New command `fit-frame-to-buffer' adjusts the frame height to
1654 *** The command `fit-window-to-buffer' can adjust the frame height
1655 if the new option `fit-frame-to-buffer' is non-nil.
1657 *** New macro `with-temp-buffer-window', similar to
1658 `with-output-to-temp-buffer'.
1660 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1663 *** New option `switch-to-buffer-preserve-window-point' to restore a
1664 window's point when switching buffers.
1666 *** New display action alist entries `window-height' and `window-width'
1667 specify the size of new windows created by `display-buffer'.
1669 *** New display action alist entry `pop-up-frame-parameters', if
1670 non-nil, specifies frame parameters to give any newly-created frame.
1672 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1673 tells display action functions to avoid changing which frame is
1676 *** New display action alist entry `previous-window', if non-nil,
1677 specifies window to reuse in `display-buffer-in-previous-window'.
1679 *** New display action functions `display-buffer-below-selected',
1680 and `display-buffer-in-previous-window'.
1682 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1683 now accept a third argument to avoid choosing the selected window.
1685 *** Additional values recognized for option `window-combination-limit'.
1687 *** The following variables are obsolete, as they can be replaced by
1688 appropriate entries in the `display-buffer-alist' function introduced
1690 **** `dired-shrink-to-fit'
1691 **** `display-buffer-reuse-frames'
1692 **** `display-buffer-function'
1693 **** `special-display-buffer-names'
1694 **** `special-display-frame-alist'
1695 **** `special-display-function'
1696 **** `special-display-regexps'
1700 *** `current-time-string' no longer requires that its argument's year
1701 must be in the range 1000..9999. It now works with any year supported
1702 by the underlying C implementation.
1704 *** `current-time' now returns extended-format time stamps
1705 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1706 PSEC is typically a multiple of 1000 on current machines. Other
1707 functions that use this format, such as `file-attributes' and
1708 `format-time-string', have been changed accordingly. Old-format time
1709 stamps are still accepted.
1711 *** The format of timers in `timer-list' and `timer-idle-list' is now
1712 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1713 The PSECS slot is new, and uses picosecond resolution. It can be
1714 accessed via the new `timer--psecs' accessor.
1716 *** Last-modified time stamps in undo lists now are of the form
1717 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1721 *** Improved security when handling persistent objects:
1723 **** `eieio-persistent-read' now features optional arguments for specifying
1724 the class to load, as well as a flag stating whether subclasses are allowed;
1725 if provided, other classes will be rejected by the reader. For
1726 compatibility with existing code, if the class is omitted only a
1729 **** New specialized reader for pulling in classes and signaling errors
1730 without evaluation of suspicious code.
1732 **** All slots that contain objects must have a :type. Slots with lists
1733 of objects must use a new type predicate for a list of an object type.
1735 *** Support for `find-function' and similar utilities, through the addition
1736 of filename support to generated symbols.
1738 ** Floating point functions now always return special values like NaN,
1739 instead of signaling errors, if given invalid args; e.g., (log -1.0).
1740 Previously, they returned NaNs on some platforms but signaled errors
1741 on others. The affected functions are acos, asin, tan, exp, expt,
1742 log, log10, sqrt, and mod.
1744 ** New fringe bitmap `exclamation-mark'.
1746 ** Miscellaneous changes to special forms and macros
1748 *** `defun' and `defmacro' are now macros rather than special forms.
1750 *** `kbd' is now a function rather than a macro.
1752 ** Miscellaneous new functions
1754 *** `set-temporary-overlay-map' sets up a temporary keymap that
1755 takes precedence over most other maps for a short while (normally one key).
1757 *** `autoloadp' tests if its argument is an autoloaded object.
1759 *** `autoload-do-load' performs the autoloading operation.
1761 *** `buffer-narrowed-p' tests if the buffer is narrowed.
1763 *** `file-name-base' returns a file name sans directory and extension.
1765 *** `function-get' fetches a function property, following aliases.
1767 *** `posnp' tests if an object is a `posn'.
1769 *** `system-users' returns the user names on the system.
1771 *** `system-groups' returns the group names on the system.
1773 *** `tty-top-frame' returns the topmost frame of a text terminal.
1775 ** The following functions and variables are obsolete:
1776 *** `automount-dir-prefix' (use `directory-abbrev-alist')
1777 *** `buffer-has-markers-at'
1778 *** `macro-declaration-function' (use `macro-declarations-alist')
1779 *** `window-system-version' (provides no useful information)
1780 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
1781 *** `query-replace-interactive'
1782 *** `font-list-limit' (has had no effect since Emacs < 23)
1785 * Changes in Emacs 24.3 on Non-Free Operating Systems
1787 ** Cygwin builds can use the native MS Windows user interface.
1788 Pass `--with-w32' to configure. The default remains the X11 interface.
1790 ** Two new functions are available in Cygwin builds:
1791 `cygwin-convert-file-name-from-windows' and
1792 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
1793 code to access the Cygwin file-name mapping machinery to convert
1794 between Cygwin and Windows-native file and directory names.
1796 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
1797 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
1798 `mouse-autoselect-window'.
1800 ** On MS Windows Vista and later Emacs now supports symbolic links.
1802 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
1803 support for libxml2, even if its presence is detected.
1805 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1807 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
1808 directories to the search path. You must add them yourself if you want them.
1811 * Changes in Emacs 24.2
1813 ** This is mainly a bug-fix release.
1816 * Installation Changes in Emacs 24.1
1818 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1819 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1820 also depend on Gtk+. You can disable them with --without-rsvg and
1823 ** Emacs can be compiled with GnuTLS 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-gnutls'. See below for GnuTLS features.
1828 ** Emacs can be compiled with SELinux support.
1829 This happens by default if a suitably recent version of the library is
1830 found at build time. To prevent this, use the configure option
1831 `--without-selinux'. See below for SELinux features.
1833 ** Emacs can be compiled with ImageMagick support.
1834 This happens by default if a suitably recent version of the library is
1835 found at build time. To prevent this, use the configure option
1836 `--without-imagemagick'. See below for ImageMagick features.
1837 This feature is not available for the Nextstep or MS ports.
1839 ** Emacs can be compiled with libxml2 support.
1840 This happens by default if a suitably recent version of the library is
1841 found at build time. To prevent this, use the configure option
1842 `--without-xml2'. See below for libxml2 features.
1844 ** By default, the installed Info and man pages are compressed.
1845 You can disable this by configuring --without-compress-info.
1847 ** New configure option --with-wide-int.
1848 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
1849 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1852 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
1853 These provide no new functionality, they just remove the need to edit
1854 lib-src/Makefile by hand in order to use the associated features.
1856 ** New configure option --enable-use-lisp-union-type.
1857 This is only useful for Emacs developers to debug certain types of bugs.
1858 This is not a new feature; only the configure flag is new.
1860 ** The standalone programs digest-doc and sorted-doc are removed.
1861 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1863 ** The standalone program `fakemail' is removed.
1864 If you need it, feedmail.el provides a superset of the functionality.
1867 * Startup Changes in Emacs 24.1
1869 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1870 command line arguments, and the EMACS_UNIBYTE environment variable, no
1871 longer have any effect. (They were declared obsolete in Emacs 23.)
1873 ** New command line option `--no-site-lisp' removes site-lisp directories
1874 from load-path. -Q now implies this. This option does not affect the
1875 EMACSLOADPATH environment variable (and hence has no effect for
1879 * Changes in Emacs 24.1
1883 *** Many packages now use the `completion-at-point' command,
1884 rather than implementing separate completion commands.
1886 *** `completion-at-point' now handles tags and semantic completion.
1888 *** Completion in a non-minibuffer now tries to detect the end of completion
1889 and pops down the *Completions* buffer accordingly.
1891 *** New option `completion-cycle-threshold' allows completion cycling.
1893 *** New option `completion-category-overrides' for overriding the
1894 default completion style in certain circumstances.
1896 *** New completion style `substring'.
1898 *** Completion of buffer names uses `substring' completion by default.
1900 *** The option `widget-complete-field' has been removed.
1904 *** The first time you try sending mail, Emacs asks for a mail method.
1905 This is implemented by a new default for `send-mail-function', which
1906 is `sendmail-query-once'. This offers to use the smtpmail package, or
1907 to use the old defaults relying on external mail facilities
1908 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
1909 `mailclient-send-it' on Windows).
1911 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
1912 transfers the report to your desktop's preferred mail client, if there
1913 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
1916 *** See Changes in Specialized Modes and Packages for SMTPmail changes
1917 and Mail mode changes
1919 ** Emacs server and client changes
1921 *** New option `server-port' specifies the port for TCP Emacs servers.
1923 *** New emacsclient argument -q/--quiet suppresses some status messages.
1925 *** New emacsclient argument --frame-parameters specifies the frame
1926 parameters of any newly-created graphical frame.
1928 *** If emacsclient shuts down due to Emacs signaling an error,
1929 its exit status is 1.
1931 *** New emacsclient argument --parent-id ID.
1932 This opens a client frame in parent X window ID, via XEmbed, similar
1933 to the --parent-id argument to Emacs.
1935 ** Internationalization changes
1937 *** Emacs now supports display and editing of bidirectional text.
1938 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1939 displayed in the correct visual order as expected by users of those
1940 scripts. The display reordering is a "full bidirectionality" class
1941 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1942 with no RTL text should look exactly the same as before.
1944 **** New buffer-local variable `bidi-display-reordering'.
1945 To disable display reordering in a buffer, change this to nil.
1947 **** New buffer-local variable `bidi-paragraph-direction'.
1948 If nil (the default), Emacs determines the base direction of each
1949 paragraph from its text, as specified by the UBA. Setting the value
1950 to `right-to-left' or `left-to-right' forces a base direction on each
1953 Paragraphs with right-to-left base direction are displayed starting at
1954 the right window edge.
1956 *** Enhanced support for characters with no glyphs in available fonts,
1957 or, on text terminals, characters that cannot be encoded by the
1958 terminal coding system. The new option `glyphless-char-display-control'
1959 specifies how to display them: as a hexadecimal code in a box, a thin
1960 1-pixel space, an empty box, etc.
1962 *** New input methods for Farsi and Bulgarian
1963 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
1965 *** `nobreak-char-display' now also highlights Unicode hyphen chars
1966 (U+2010 and U+2011).
1968 *** New Hebrew translation of the Emacs Tutorial.
1969 Type `C-u C-h t' to choose it in case your language setup doesn't
1970 automatically select it.
1972 ** An Emacs Lisp package manager is now included.
1973 This is a convenient way to download and install additional packages,
1974 from a package repository at http://elpa.gnu.org.
1976 *** M-x list-packages shows a list of packages, which can be
1977 selected for installation.
1979 *** New command `describe-package', bound to `C-h P'.
1981 *** By default, all installed packages are loaded automatically when
1982 Emacs starts up. To disable this, set `package-enable-at-startup' to
1983 nil. To specify the packages to load, customize `package-load-list'.
1985 ** Custom theme changes
1987 *** New command `M-x customize-themes', which provides a convenient
1988 interface for enabling and disabling Custom themes.
1990 *** New option `custom-theme-load-path' is the load path for themes.
1991 Emacs no longer looks for Custom themes in `load-path'. The default
1992 value of `custom-theme-load-path' says to look for themes in
1993 `custom-theme-directory', followed by a subdirectory of
1994 `data-directory' named "themes/", which contains a small selection of
1995 built-in Custom themes.
1997 *** New option `custom-safe-themes' records known-safe theme files.
1998 If a theme is not in this list, Emacs queries before loading it, and
1999 offers to save the theme to `custom-safe-themes' automatically. By
2000 default, all themes included in Emacs are treated as safe.
2002 ** Improved GTK integration
2004 *** GTK scroll-bars are now placed on the right by default.
2005 The function `set-scroll-bar-mode' can change this.
2007 *** GTK tool bars can have just text, just images or images and text.
2008 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2009 the default is taken from desktop settings.
2011 *** GTK tool bars can be placed on any edge of the frame.
2012 The frame-parameter tool-bar-position controls this. It takes the
2013 values top, left, right or bottom. The Options => Show/Hide menu has
2016 *** The default colors for selected text (the `region' face) are taken
2017 from the GTK theme when Emacs is built with GTK.
2019 *** Emacs uses GTK tooltips by default if built with GTK.
2020 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2022 ** Graphical interface changes
2024 *** On graphical displays, the mode-line no longer ends in dashes.
2025 Also, the first dash (which does not indicate anything) is just
2026 displayed as a space.
2028 *** `menu-bar-select-buffer-function' lets you choose another operation
2029 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2031 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2032 built with Xft. These fonts can be set via X resources, for example:
2033 Emacs.pane.menubar.font: Courier-12
2037 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2038 or if it receives a SIGINT signal in batch mode.
2040 *** `kill-emacs-hook' is now also run in batch mode.
2041 Third-party code which adds to `kill-emacs-hook' should check if they
2042 do the right thing in batch mode.
2044 ** Scrolling changes
2046 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2047 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2048 of buffer at first key-press (instead they move to top/bottom of buffer)
2049 when `scroll-error-top-bottom' is non-nil.
2051 *** New option `scroll-error-top-bottom' (see above).
2053 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2054 scroll a line instead of full screen.
2056 *** New property `scroll-command' should be set on a command's symbol to
2057 define it as a scroll command affected by `scroll-preserve-screen-position'.
2059 *** If you customize `scroll-conservatively' to a value greater than 100,
2060 Emacs will never recenter point in the window when it scrolls due to
2061 cursor motion commands or commands that move point (e.f., `M-g M-g').
2062 Previously, you needed to use `most-positive-fixnum' as the value of
2063 `scroll-conservatively' to achieve the same effect.
2065 *** "Aggressive" scrolling now honors the scroll margins.
2066 If you customize `scroll-up-aggressively' or
2067 `scroll-down-aggressively' and move point off the window, Emacs now
2068 scrolls the window so as to avoid positioning point inside the scroll
2071 ** Basic SELinux support has been added.
2072 This requires Emacs to be linked with libselinux at build time.
2074 *** Emacs preserves the SELinux file context when backing up.
2075 Also, the function `copy-file' has an extra optional argument for
2076 preserving SELinux context, and the return value of `backup-buffer'
2077 now includes the SELinux context.
2079 *** New functions `file-selinux-context' and `set-file-selinux-context'
2080 get and set the SELinux context of a file.
2084 *** `delete-by-moving-to-trash' now only affects commands that specify
2085 trashing. This avoids inadvertently trashing temporary files.
2087 *** Calling `delete-file' or `delete-directory' with a prefix argument
2088 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2090 ** File- and directory-local variable changes
2092 *** You can stop directory local vars from applying to subdirectories.
2093 Add an element (subdirs . nil) to the alist portion of any variables
2094 settings to indicate that the section should not apply to
2097 *** Directory local variables can apply to some file-less buffers.
2098 Affected modes include dired, vc-dir, and log-edit. For example,
2099 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2100 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2101 `hack-dir-local-variables-non-file-buffer' to support this.
2103 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2104 Instead, use "eval: (minor-mode 1)".
2106 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2107 to `inhibit-local-variables-regexps'. As the name suggests, it now
2108 applies to ALL file local variables, not just -*- lines. The
2109 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2114 *** The `quit-window' command now restores the last buffer displayed
2115 in the quitted window.
2117 *** Resizing an Emacs frame now preserves proportional window sizes,
2118 modulo restrictions like window minimum sizes and fixed-size windows.
2120 *** The behavior of `display-buffer' is now customizable in detail.
2122 **** New option `display-buffer-base-action' specifies a list of
2123 user-determined display "actions" (functions and optional arguments
2124 for choosing the displaying window).
2126 This takes precedence over the default display action, which is
2127 specified by `display-buffer-fallback-action'.
2129 **** New option `display-buffer-alist' maps buffer name regexps to
2130 display actions, taking precedence over `display-buffer-base-action'.
2132 *** New option `window-combination-limit'.
2133 The new option `window-combination-limit' allows to return the space
2134 obtained for resizing or creating a window more reliably to the window
2135 from which such space was obtained.
2137 *** New option `window-combination-resize'.
2138 The new option `window-combination-resize' allows to split a window that
2139 otherwise cannot be split because it's too small by stealing space from
2140 other windows in the same combination. Subsequent resizing or deletion
2141 of the window will resize all windows in the same combination as well.
2143 *** New option `frame-auto-hide-function' lets you choose between
2144 iconifying or deleting a frame when burying a buffer in a dedicated
2145 frame, or quitting a window showing a buffer in a frame of its own.
2147 *** New commands `maximize-window' and `minimize-window'.
2148 These maximize and minimize the size of a window within its frame.
2150 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2151 These functions allow to navigate through the live buffers that have
2152 been shown in a specific window.
2154 ** Minibuffer changes
2156 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2157 This is handy for minibuffer-only frames, and is also used for the feature
2158 where mouse-1 pops up *Messages*"', which can now easily be changed.
2160 *** Minibuffers set `truncate-lines' to nil.
2161 If you want to change the value to something else, you could use
2162 for example `minibuffer-setup-hook'.
2164 ** `auto-mode-case-fold' is now enabled by default.
2166 ** `backup-by-copying-when-mismatch' now defaults to t.
2168 ** New basic faces `error', `warning', `success'.
2169 These are used to highlight text indicating failure, caution or
2170 successful operation.
2172 ** New option `list-colors-sort' defines the color sort order
2173 for `list-colors-display'.
2175 ** The variable `focus-follows-mouse' now always defaults to nil.
2178 * Editing Changes in Emacs 24.1
2182 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2183 `isearch-yank-line'.
2185 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2186 `isearch-yank-kill'.
2188 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2190 ** New commands `count-words-region' and `count-words'.
2192 *** M-= is bound to `count-words-region', not `count-lines-region'.
2193 The `count-words-region' command, when called interactively, reports
2194 the number of lines, words, and characters in the region. It is a
2195 superset of the old `count-lines-region', which is now an obsolete
2198 ** The command `just-one-space' (M-SPC), if given a negative argument,
2199 also deletes newlines around point.
2203 *** New option `delete-active-region'.
2204 If non-nil, [delete] and DEL delete the region if it is active and no
2205 prefix argument is given. If set to `kill', those commands kill
2208 *** New command `delete-forward-char', bound to [delete].
2209 This is meant for interactive use, and obeys `delete-active-region'.
2210 The command `delete-char' does not obey `delete-active-region'.
2212 *** `delete-backward-char' is now a Lisp function.
2213 Apart from obeying `delete-active-region', its behavior is unchanged.
2214 However, the byte compiler now warns if it is called from Lisp; Lisp
2215 callers should use delete-char with a negative argument instead.
2217 *** The option `mouse-region-delete-keys' has been deleted.
2219 ** Selection changes.
2221 The default handling of clipboard and primary selections has been
2222 changed to conform with modern X applications. In short, most
2223 commands for killing and yanking text now use the clipboard, while
2224 mouse commands use the primary selection.
2226 In the following, we provide a list of these changes, followed by a
2227 list of steps to get the old behavior back if you prefer that.
2229 *** `select-active-regions' now defaults to t.
2230 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2231 the kill ring. The selected text is put in the primary selection, if
2232 the system possesses a separate primary selection facility (e.g. X).
2234 **** `select-active-regions' also accepts a new value, `only'.
2235 This means to only set the primary selection for temporarily active
2236 regions (usually made by mouse-dragging or shift-selection);
2237 "ordinary" active regions, such as those made with C-SPC followed by
2238 point motion, do not alter the primary selection.
2240 **** `mouse-drag-copy-region' now defaults to nil.
2242 *** mouse-2 is now bound to `mouse-yank-primary'.
2243 This pastes from the primary selection, ignoring the kill-ring.
2244 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2246 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2248 *** `x-select-enable-primary' now defaults to nil.
2249 Thus, commands that kill text or copy it to the kill-ring (such as
2250 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2252 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2253 exactly equivalent to M-w, C-w, and C-y respectively.
2255 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2256 non-nil by default, as Windows does not support the primary selection
2257 between applications.
2259 *** To return to the previous behavior, do the following:
2261 **** Change `select-active-regions' to nil.
2262 **** Change `mouse-drag-copy-region' to t.
2263 **** Change `x-select-enable-primary' to t (on X only).
2264 **** Change `x-select-enable-clipboard' to nil.
2265 **** Bind `mouse-yank-at-click' to mouse-2.
2267 *** Support for X cut buffers has been removed.
2269 *** X clipboard managers are now supported.
2270 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2272 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2273 in the current rectangle. With a prefix argument, this prompts for a
2274 number to count from and for a format string.
2276 ** `redisplay-dont-pause' now defaults to t.
2277 This makes Emacs feel more responsive to editing commands that arrive
2278 at high rate, e.g. if you lean on some key, because stopping redisplay
2279 in the middle (when this variable is nil) forces more expensive
2280 updates later on, and Emacs appears to be unable to keep up.
2282 ** The behavior of <TAB> for active regions in Text mode has changed.
2283 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2284 when the region is active causes Emacs to indent all the lines in the
2285 region, aligning them with the line previous to the first line in the
2286 region (or with the left margin if there is no previous line).
2288 ** When `occur' is called with a prefix argument, matching strings are
2289 collected into the `*Occur*' buffer without line numbers. If there
2290 are parenthesized subexpressions in the specified regexp, `occur'
2291 reads replacement text that may contain \\& and \\N whose convention
2292 follows `replace-match'.
2295 * Changes in Specialized Modes and Packages in Emacs 24.1
2297 ** Archive Mode has basic support for browsing and updating 7z archives.
2301 *** BibTeX mode now supports biblatex.
2302 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2303 `bibtex-entry-field-alist' is now an obsolete alias for
2304 `bibtex-BibTeX-entry-alist'.
2306 *** New command `bibtex-search-entries', bound to C-c C-a.
2308 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2310 *** New variable `bibtex-search-entry-globally'.
2314 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2316 *** The default browser used by the package is now the "xdg-open" program,
2317 on platforms that support it. This calls your desktop's preferred browser.
2321 *** Support for musical notes.
2323 *** Support for logarithmic units.
2325 *** No longer uses the tex prefix for TeX specific unit names when
2326 using TeX or LaTeX mode.
2328 *** New option to highlight selections using faces.
2330 *** `calc-histogram' has the option of using a vector to determine the bins.
2332 *** New "O" option prefix.
2334 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2336 ** Calendar, Diary, and Appt
2338 *** Diary entries can contain non-printing "comments".
2339 See the variable `diary-comment-start'.
2341 *** Appointments can specify their individual warning times.
2342 See the variable `appt-warning-time-regexp'.
2344 *** The function specified by `appt-disp-window-function' may be passed
2345 lists of arguments if multiple appointments are due at similar times.
2346 If you are using a custom function for this, you should update it.
2348 *** New function `diary-hebrew-birthday'.
2350 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2351 may no longer be nil, but must all be strings.
2353 *** The obsolete (since Emacs 22.1) method of enabling the appt
2354 package by adding `appt-make-list' to `diary-hook' has been removed.
2355 Use `appt-activate' instead.
2357 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2358 appt-issue-message (use the function appt-activate)
2359 appt-visible/appt-msg-window (use the variable appt-display-format)
2361 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2362 view-diary-entries, list-diary-entries, show-all-diary-entries
2366 *** New feature to "guess" the style in an existing buffer.
2367 The main entry point is M-x c-guess.
2369 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2371 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2372 Thus C-M-a will, by default, go to the beginning of the immediate function,
2375 *** "Macros with semicolons" can be registered for correct indentation.
2376 Where such a macro ends a line (no semicolon) the next statement is no longer
2377 parsed as a statement continuation.
2379 ** Comint and modes derived from it use the standard completion code.
2383 *** Compilation mode can be used without Font Lock mode.
2384 `compilation-parse-errors-function' is now obsolete.
2386 *** New variable `compilation-filter-start', which is bound while
2387 `compilation-filter-hook' runs. It records the start position of the
2388 text inserted by `compilation-filter'.
2390 *** `compilation-error-screen-columns' and `compilation-first-column'
2391 are obeyed in the editing buffer. So programming language modes can
2392 set them, whereas previously only the value in the *Compilation*
2397 *** Customize buffers now contain a search field.
2398 The search is performed using `customize-apropos'.
2399 To turn off the search field, set `custom-search-field' to nil.
2401 *** Options in customize group buffers start out hidden if not customized.
2402 Use the arrow to the left of the option name to toggle visibility.
2404 *** custom-buffer-sort-alphabetically now defaults to t.
2406 *** The color widget now has a "Choose" button, which allows you to
2407 choose a color via `list-colors-display'.
2411 *** It is now possible to access buses other than the default system
2414 *** The `dbus-register-method' and `dbus-register-property' functions
2415 optionally do not register names.
2417 *** The new function `dbus-register-service' registers a known service
2418 name on a D-Bus without also registering a property or a method.
2422 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2423 if called with a prefix argument, read a file name from the minibuffer
2424 instead of using the current buffer.
2426 *** The "dired local variables" feature of Dired-x is obsolete.
2427 The standard directory local variables feature replaces it.
2431 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2432 controlling attempts to autojoin a channel.
2434 *** New variable `erc-coding-system-precedence': If we use `undecided'
2435 as the server coding system, this variable will then be consulted.
2436 The default is to decode strings that can be decoded as utf-8 as
2437 utf-8, and do the normal `undecided' decoding for the rest.
2441 *** The default value of `eshell-directory-name' has changed
2442 to be an "eshell" directory in `user-emacs-directory'.
2443 The old "~/.eshell/" directory is still used if it exists, though.
2447 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2448 It now supports multithread non-stop debugging and simultaneous
2449 debugging of several threads.
2453 *** RET (`image-toggle-animation') toggles animation, if applicable.
2454 Animation plays once, unless the option `image-animate-loop' is non-nil.
2458 *** New command M-x info-display-manual displays a named Info manual.
2459 If that manual is already visited in some Info buffer, it displays
2460 that buffer. (This is handy if you have many manuals in many *info*
2461 buffers, and don't remember the name of the buffer visiting the manual
2462 you want to consult.) Otherwise, it loads and displays the manual.
2464 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2465 This is for compatibility with the stand-alone Info reader program,
2466 and also because `Info-edit' is a rarely used command that is disabled
2469 ** Mail mode changes (not Message mode)
2471 *** New command M-x mail-add-attachment for adding MIME attachments
2473 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2474 (Its name is misleading, since it has nothing to do with MIME
2475 attachments.) The old name is now an obsolete alias to the new name.
2477 ** MH-E has been updated to MH-E version 8.3.1.
2478 See MH-E-NEWS for details.
2480 ** Modula-2 mode provides auto-indentation.
2482 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2484 ** nXML mode no longer binds C-RET to `nxml-complete'.
2485 Completion is now performed via `completion-at-point', bound to C-M-i
2486 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2487 default), this performs tag completion.
2489 ** Org mode has been updated to version 7.8.09.
2490 See ORG-NEWS for details.
2492 ** Prolog mode has been completely revamped, with lots of additional
2493 functionality such as more intelligent indentation, electricity,
2494 support for more variants, including Mercury, and a lot more.
2498 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2499 in the Rmail incoming message.
2501 *** The variable `rmail-message-filter' no longer has any effect.
2502 This change was made in Emacs 23.1 but was not advertised at the time.
2503 Try using `rmail-show-message-hook' instead.
2507 *** M-x shell prompts for the shell path name if the default directory
2508 is a remote file name and neither the environment variable $ESHELL nor
2509 the variable `explicit-shell-file-name' is set.
2511 *** TAB is now bound to the standard `completion-at-point' command,
2512 which now implements the pcomplete rules for shell command completion.
2516 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2517 if the mail server supports them. This uses either built-in GnuTLS
2518 support, or the starttls.el library. Customize `smtpmail-stream-type'
2521 *** The variable `smtpmail-auth-credentials' has been removed.
2522 By default, the information is now stored in the file ~/.authinfo.
2523 This was the default value of smtpmail-auth-credentials. If you had
2524 customized smtpmail-auth-credentials to a list of user names and
2525 passwords, those settings are not used. During your first connection
2526 to the smtp server, Emacs will prompt for the user name and password,
2527 and offer to save them to ~/.authinfo. Or you can manually copy the
2528 credentials to ~/.authinfo. For example, if you had
2530 (setq smtpmail-auth-credentials
2531 '(("mail.example.org" 25 "jim" "s!cret")))
2533 then the equivalent line in ~/.authinfo would be
2535 machine mail.example.org port 25 login jim password s!cret
2537 See the auth-source manual for more information, e.g. on encrypting
2538 the credentials file.
2540 *** The variable `smtpmail-starttls-credentials' has been removed.
2541 If you had that set, you need to put
2543 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2545 in your ~/.authinfo file instead.
2547 *** SMTPmail defaults to using the address in the From: header as the
2548 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2549 to the address you wish to use instead.
2553 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2554 and `sql-oracle-scan-on'.
2556 *** New options controlling prompting for login parameters.
2557 Each supported product has a custom variable `sql-*-login-params',
2558 which is a list of the parameters to be prompted for before a
2559 connection is established.
2561 *** The command `sql-product-interactive' now takes a prefix argument,
2562 which causes it to prompt for an SQL product.
2564 *** Product-specific SQL interactive commands now take prefix arguments.
2565 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2566 given a prefix argument, prompt for a name for the SQL interactive
2567 buffer. This reduces the need for calling `sql-rename-buffer'.
2569 *** SQL interactive modes suppress command continuation prompts, and
2570 replace tabs with spaces. The first change impacts multiple line SQL
2571 statements entered with C-j between each line, statements yanked into
2572 the buffer and statements sent with `sql-send-*' functions. The
2573 second prevents the MySQL and Postgres interpreters from listing
2574 object name completions when sent text via `sql-send-*' functions.
2576 *** New command `sql-connect' starts a predefined SQLi session,
2577 using the login parameters from `sql-connection-alist'.
2579 *** New "Save Connection" menu item in SQLi buffers.
2580 This gathers the login params specified for the SQLi session, if it
2581 was not started by a connection, and saves them as a new connection.
2583 *** New commands for listing database objects and details:
2584 sql-list-all and sql-list-table.
2586 *** An API for manipulating SQL product definitions has been added.
2590 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2594 *** New inline access method "ksu" (kerberized su).
2596 *** The following access methods are discontinued: "ssh1_old",
2597 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2599 *** The user option `remote-file-name-inhibit-cache' controls whether
2600 remote file attributes are cached for better performance.
2602 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2603 default value to "".
2605 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2606 for remote machines which support SELinux.
2608 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2609 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2610 the degree of parallelism.
2612 ** VC and related modes
2614 *** Support for pulling on distributed version control systems.
2615 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2616 supported (currently with Bzr, Git, and Mercurial), to update the
2617 current branch and working tree. A prefix argument means to prompt
2618 the user for specifics, e.g. a pull location.
2620 *** `vc-update' is now an alias for `vc-pull'.
2622 *** Support for merging on distributed version control systems.
2623 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2624 is supported (currently with Bzr, Git, and Mercurial), to merge
2625 changes from another branch into the current one. It prompts for
2626 specifics, e.g. a merge source.
2628 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2629 shows a diff while querying the user. It defaults to t.
2631 *** Log entries in some Log View buffers can be toggled to display a
2632 longer description by typing RET (log-view-toggle-entry-display).
2633 This is currently supported for Bzr, Git, and Mercurial (to support
2634 another backend, define a `log-view-expanded-log-entry-function').
2635 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2636 use this to display the full log entry for the revision at point.
2638 *** New command `vc-ediff' allows visual comparison of two revisions
2639 of a file similar to `vc-diff', but using ediff backend.
2641 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2642 this was not advertised at the time.
2644 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2645 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2646 this was not advertised at the time.
2652 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2654 *** partial-completion-mode (complete.el) is obsolete.
2655 You can get a comparable behavior with:
2656 (setq completion-styles '(partial-completion initials))
2657 (setq completion-pcm-complete-word-inserts-delimiters t)
2659 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2661 *** pgg is obsolete (use EasyPG instead).
2663 *** sregex.el is obsolete, since rx.el is a strict superset.
2665 *** s-region.el and pc-select.el are obsolete.
2666 They are superseded by shift-select-mode, enabled by default since 23.1.
2668 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2672 *** The Landmark game is now invoked with `landmark', not `lm'.
2673 Its functions and variables have been similarly renamed.
2675 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2676 (This interfered with cua-mode.)
2678 *** f90.el has some support for Fortran 2008 syntax.
2680 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2682 *** New command `nato-region' converts text to NATO phonetic alphabet.
2685 * New Modes and Packages in Emacs 24.1
2687 ** Occur Edit mode applies edits made in *Occur* buffers to the
2688 original buffers. It is bound to "e" in Occur mode.
2690 ** New global minor mode electric-pair-mode.
2691 When enabled, typing an open parenthesis automatically inserts the
2692 matching closing one.
2694 ** New global minor mode electric-indent-mode.
2695 When enabled, typing certain characters triggers reindentation.
2696 Major modes wishing to use this can set electric-indent-chars or
2697 electric-indent-functions.
2699 ** New global minor mode electric-layout-mode.
2700 When enabled, typing certain characters automatically inserts newlines.
2701 Major modes wishing to use this can set electric-layout-rules.
2703 ** tabulated-list.el provides a generic major mode for tabulated data,
2704 from which other modes can be derived.
2706 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2708 ** secrets.el is an implementation of the Secret Service API, an
2709 interface to password managers like GNOME Keyring or KDE Wallet. The
2710 Secret Service API requires D-Bus for communication. The command
2711 `secrets-show-secrets' offers a buffer with a visualization of the
2714 ** notifications.el provides an implementation of the Desktop
2715 Notifications API. It requires D-Bus for communication.
2717 ** soap-client.el supports access to SOAP web services from Emacs.
2718 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2720 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
2722 ** New emacs-lock.el package.
2723 The previous version has been moved to obsolete/old-emacs-lock.el.
2724 Now, there is a proper minor mode `emacs-lock-mode'. Protection
2725 against exiting Emacs and killing the buffer can be set separately.
2726 The mechanism for automatically turning off protection for buffers
2727 with dead inferior processes has been generalized.
2730 * Incompatible Lisp Changes in Emacs 24.1
2732 ** Passing a nil argument to a minor mode function call now ENABLES
2733 the minor mode unconditionally. This is so that you can write e.g.
2735 (add-hook 'text-mode-hook 'foo-mode)
2737 to enable foo-mode in Text mode buffers, removing the need for
2738 `turn-on-foo-mode' style functions. This affects all mode commands
2739 defined by `define-minor-mode'. If called interactively, the mode
2740 command still toggles the minor mode.
2742 ** The return value of `backup-buffer' has changed.
2743 It is now a list of three elements, where the second element is a list
2744 describing the original file's SELinux context. If Emacs or the
2745 system lacks SELinux support, the context list is (nil nil nil nil).
2746 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
2748 ** `char-direction-table' and the `char-direction' function were deleted.
2749 They were buggy and inferior to the new support of bidirectional
2750 editing introduced in Emacs 24. If you need the bidirectional
2751 properties of a character, use `get-char-code-property' with the last
2752 argument `bidi-class'.
2754 ** `copy-directory' now copies the source directory as a subdirectory
2755 of the target directory, if the latter is an existing directory. The
2756 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2757 the contents directly into a pre-existing target directory.
2759 ** For mouse click input events in the text area, the Y pixel
2760 coordinate in the POSITION list now counts from the top of the text
2761 area, excluding any header line. Previously, it counted from the top
2764 ** Support for "old-style" backquotes, obsolete for 10+ years, has
2765 been further reduced. Now a backquote not followed by a space is
2766 always treated as a "new-style" backquote. Please remove all
2767 "old-style" backquotes from your code. If your code uses backquotes
2768 as documented in the Elisp manual, and compiles without warning, then
2769 you have nothing to do in this regard. Code not following the
2770 appropriate conventions may fail to compile.
2772 The most common cause of trouble seems to be an old-style backquote
2773 followed by a newline. Another cause of trouble is vector notation
2774 for key sequence notation: instead of [(control ,)] and [(control ')],
2775 you should write [(control ?,)] and [(control ?')], which will work in
2778 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2779 was not advertised at the time. The function `custom-initialize-delay'
2780 replaced all known uses.
2782 ** `view-buffer' now treats special mode-class in the same way that
2783 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2784 major mode is special).
2786 ** Menu and tool bar changes
2788 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
2789 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2790 With these alist entries omitted, `make-frame' checks the value of the
2791 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2792 a menu-bar or tool-bar, respectively. If the alist entries are added,
2793 they override the value of `menu-bar-mode'/`tool-bar-mode'.
2795 *** The menu bar bindings's caches are not used any more.
2796 Use (where-is-internal <def> nil t) instead.
2798 ** Regions created by mouse dragging are now normal active regions,
2799 similar to those created by shift-selection (see Selection changes
2800 above). In previous Emacs versions, these regions were delineated by
2801 `mouse-drag-overlay'; that variable has been removed.
2803 ** The fourth argument of `filter-buffer-substring' has been removed.
2804 If you want to remove text properties from the final result, simply
2805 pass the result through substring-no-properties.
2807 ** cl.el no longer provides `cl-19'.
2809 ** The following obsolete functions and aliases have been removed
2810 (the appropriate new function is given in parentheses; "not needed"
2811 means you can just remove all calls to the function in question):
2813 *** `comint-kill-output' (`comint-delete-output')
2814 *** `decompose-composite-char' (`char-to-string')
2815 *** `outline-visible' (`outline-invisible-p')
2816 *** `internal-find-face' (`facep')
2817 *** `internal-get-face' (`facep and check-face')
2818 *** `frame-update-faces' (not needed)
2819 *** `frame-update-face-colors' (`frame-set-background-mode')
2820 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2821 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2822 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2823 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2824 *** `x-make-font-unbold' (`make-face-unbold')
2825 *** `x-make-font-unitalic' (`make-face-unitalic')
2826 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2827 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2828 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2829 *** `char-bytes' (== 1)
2830 *** `isearch-return-char' (`isearch-printing-char')
2831 *** `make-local-hook' (not needed)
2832 *** `set-screen-height' (`set-frame-height')
2833 *** `set-screen-width' (`set-frame-width')
2835 ** The following obsolete variables and varaliases have been removed
2836 (the appropriate new variable is given in parentheses):
2838 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2839 *** `vc-header-alist' (`vc-BACKEND-header')
2840 *** `directory-sep-char' (== ?/)
2841 *** `font-lock-defaults-alist' (`font-lock-defaults')
2842 *** `e' (`float-e').
2844 ** The following obsolete files were removed:
2845 sc.el, x-menu.el, rnews.el, rnewspost.el
2847 ** The format of the finder-inf.el file has changed, since the Finder
2848 mechanism is now based on the package system. The variable
2849 `finder-package-info' is replaced by `package--builtins' and
2850 `finder-keywords-hash'.
2852 ** When generating autoloads, `update-directory-autoloads' no longer
2853 assumes every inspected file is in your `load-path'. It instead
2854 generates relative names according to the current `load-path'.
2857 * Lisp Changes in Emacs 24.1
2859 ** Code can now use lexical scoping by default instead of dynamic scoping.
2860 The `lexical-binding' variable enables lexical scoping for local
2861 variables. It is typically set via a file-local variable in the first
2862 line of the file, in which case it applies to all the code in that
2865 *** `eval' takes a new optional argument `lexical' to choose the new lexical
2866 binding instead of the old dynamic binding mode.
2868 *** Lexically scoped interpreted functions are represented with a new form
2869 of function value which looks like (closure ENV ARGS &rest BODY).
2871 *** New macro `letrec' to define recursive local functions.
2873 *** `defvar' and `defconst' now mark the variable as special (dynamic).
2874 So do `defcustom' and other forms that call `defvar' as a subroutine.
2876 *** New function `special-variable-p' to check whether a variable is
2877 declared as dynamically bound.
2879 *** The form ((lambda ...) ...) is deprecated.
2881 ** An Emacs Lisp testing tool is now included.
2882 Emacs Lisp developers can use this tool to write automated tests for
2883 their code. See the ERT info manual for details.
2885 ** Changes for bidirectional display and editing
2887 *** New function `current-bidi-paragraph-direction'.
2888 This returns the base direction of the paragraph at point.
2890 *** New function `bidi-string-mark-left-to-right'.
2891 Given a string containing characters from right-to-left scripts, this
2892 function returns another string which can be safely inserted into a
2893 buffer, such that any following text will be always displayed to the
2894 right of that string. (This works by appending an invisible Unicode
2895 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
2897 This is useful when the buffer has overall left-to-right paragraph
2898 direction and you need to insert a string whose contents are not known
2899 in advance, without disrupting the layout of the line.
2903 *** Window tree functions are accessible in Elisp.
2904 Functions are provided to return the parent, siblings or child windows
2905 of any window including internal windows (windows not associated with a
2906 buffer) in the window tree.
2908 **** New function `window-valid-p' gives non-nil for live and internal
2911 **** Window manipulation can deal with internal windows.
2912 Many window handling functions like `split-window', `delete-window', or
2913 `delete-other-windows' as well as the window resizing functions can now
2914 act on any window including internal ones.
2916 *** window-total-height/-width vs window-body-height/-width.
2917 The function `window-height' has been renamed to `window-total-height'
2918 and `window-width' has been renamed to `window-body-width'. The old
2919 names are provided as aliases. Two new functions `window-total-width'
2920 and `window-body-height' are provided.
2922 *** Window parameters specific to window handling functions.
2923 For each window you can specify a parameter to override the default
2924 behavior of a number of functions like `split-window', `delete-window'
2925 and `delete-other-windows'. The variable `ignore-window-parameters'
2926 allows to ignore processing such parameters.
2928 *** New semantics of third argument of `split-window'.
2929 The third argument of `split-window' has been renamed to SIDE and can be
2930 set to any of the values 'below, 'right, 'above, or 'left to make the
2931 new window appear on the corresponding side of the window that shall be
2932 split. Any other value of SIDE will cause `split-window' to split the
2933 window into two side-by-side windows as before.
2935 *** Window resizing functions.
2936 A new standard function for resizing windows called `window-resize' has
2937 been introduced. This and all other functions for resizing windows no
2938 longer delete any windows when they become too small.
2940 *** Deleting the selected window now selects the most recently selected
2941 live window on that frame instead.
2943 *** `adjust-window-trailing-edge' adjustments.
2944 `adjust-window-trailing-edge' can now deal with fixed-size windows and
2945 is able to resize other windows if a window adjacent to the trailing
2946 edge cannot be shrunk any more. This makes its behavior more similar to
2947 that of Emacs 21 without compromising, however, its inability to delete
2948 windows which was introduced in Emacs 22.
2950 *** Window-local buffer lists.
2951 Windows now have local buffer lists. This means that removing a buffer
2952 from display in a window will preferably show the buffer previously
2953 shown in that window with its previous window-start and window-point
2954 positions. This also means that the same buffer may be automatically
2955 shown twice even if it already appears in another window.
2957 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2958 which if non-nil requires the buffer to be displayed in the currently
2959 selected window, signaling an error otherwise. If nil, another window
2960 can be used, e.g. if the selected one is strongly dedicated.
2962 *** `split-window-vertically' and `split-window-horizontally' renamed
2963 to `split-window-below' and `split-window-right' respectively.
2964 The old names are kept as aliases.
2968 **** The second arg to `display-buffer' and `pop-to-buffer' is now
2969 named ACTION, and takes a display action of the same form as
2970 `display-buffer-base-action' (see Changes, above). A non-nil,
2971 non-list value is treated specially, as the old meaning.
2973 **** New variable `display-buffer-overriding-action'.
2975 **** The procedure of `display-buffer' etc. to choose a window is
2976 determined by combining `display-buffer-overriding-action',
2977 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2978 and `display-buffer-fallback-action'. The second and fourth of these
2979 are user-customizable variables.
2981 See the docstring of `display-buffer' for details.
2983 *** New functions `window-state-get' and `window-state-put'.
2984 These functions allow to save and restore the state of an arbitrary
2985 frame or window as an Elisp object.
2989 *** New variable `completion-extra-properties' used to specify extra
2990 properties of the current completion:
2991 - :annotate-function, same as the old completion-annotate-function.
2992 - :exit-function, function to call after completion took place.
2994 *** Functions on `completion-at-point-functions' can return any of the
2995 properties valid for `completion-extra-properties'.
2997 *** `completion-annotate-function' is obsolete.
2999 *** New `metadata' method for completion tables. The metadata thus returned
3000 can specify various details of the data returned by `all-completions':
3001 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3002 used to select a style in completion-category-overrides.
3003 - `annotation-function' to add annotations in *Completions*.
3004 - `display-sort-function' to specify how to sort entries in *Completions*.
3005 - `cycle-sort-function' to specify how to sort entries when cycling.
3007 *** `minibuffer-local-filename-must-match-map' is not used any more.
3008 Instead, the bindings in `minibuffer-local-filename-completion-map'
3009 are combined with `minibuffer-local-must-match-map'.
3011 *** New variable `completing-read-function' allows overriding the
3012 behavior of `completing-read'.
3014 ** `glyphless-char-display' can now distinguish between graphical and
3015 text terminal display, via a char-table entry that is a cons cell.
3017 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3018 Instead, the offending function is removed.
3022 *** New function `run-hook-wrapped' for running an abnormal hook by
3023 passing the hook functions as arguments to a "wrapping" function.
3024 Like `run-hook-with-args-until-success', it stops at the first
3025 non-nil return value.
3027 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3028 set of "wrapping" filters, similar to around advice.
3029 (A version of this macro was actually added in Emacs 23.2 but was not
3030 advertised at the time.)
3034 *** New macro `condition-case-unless-debug' (this was actually added in
3035 Emacs 23.1 as condition-case-no-debug, but not advertised)
3037 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3039 *** Variable `stack-trace-on-error' removed.
3041 *** The debugger can now "continue" from an error, which means it will
3042 jump to the error handler as if the debugger had not been invoked
3043 instead of jumping all the way to the top-level.
3045 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3046 This can be useful when `inhibit-quit' is set.
3048 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3049 named Emacs server instances.
3051 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3052 to redirect STDOUT to a file.
3054 ** The function `format-time-string' now supports the %N directive,
3055 for higher-resolution time stamps.
3057 ** New input reading functions
3059 *** New function `read-char-choice' reads a restricted set of
3060 characters, discarding any inputs not inside the set.
3062 *** The command `read-color' now requires a match for a color name
3063 or RGB triplet, instead of signaling an error if the user provides
3066 **** `facemenu-read-color' is now an alias for `read-color'.
3068 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3069 The variable is now used to load all kind of supported dynamic libraries,
3070 not just image libraries. The previous name is still available as an
3073 ** Syntax parsing changes
3075 *** New variable `syntax-propertize-function'.
3076 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3077 This allows syntax-table properties to be set independently from font-lock:
3078 just call syntax-propertize to make sure the text is propertized.
3079 Together with this new variable come a new hook
3080 syntax-propertize-extend-region-functions, as well as two helper functions:
3081 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3082 as-is; and syntax-propertize-rules which provides a new way to specify
3085 *** Syntax tables support a new "comment style c" additionally to style b.
3087 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3089 ** frame-local variables cannot be let-bound any more.
3091 ** Major and minor mode changes
3093 *** `set-auto-mode' now respects mode: local variables at the end of files,
3094 as well as those in the -*- line.
3096 *** `prog-mode' is a new major mode from which programming modes
3099 **** `prog-mode-hook' can be used to enable features for programming
3100 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3101 on-the-fly spell checking for comments and strings.
3103 **** New minor modes `prettify-symbols-mode' and
3104 `global-prettify-symbols-mode' let the user enable symbol
3105 prettification (replacing a string like "lambda" with the Greek lambda
3108 *** New hook `change-major-mode-after-body-hook', run by
3109 `run-mode-hooks' just before any other mode hooks.
3111 *** Enabled globalized minor modes can be disabled in specific major modes.
3112 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3113 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3115 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3117 ** File-handling changes
3119 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3120 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3121 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3122 argument is supplied (see Trash changes, above).
3124 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3126 ** Tool-bars can display separators.
3127 Tool-bar separators are handled like menu separators in menu-bar maps,
3128 i.e. via menu entries of the form `(menu-item "--")'.
3132 *** Animated images support (currently animated gifs only).
3134 **** `image-animated-p' returns non-nil if an image can be animated.
3136 **** `image-animate' animates a supplied image spec.
3138 **** `image-animate-timer' returns the timer object for an image that
3141 *** `image-extension-data' has been renamed to `image-metadata'.
3142 The old name is an obsolete alias to the new one.
3144 *** Image mode can view any image type that ImageMagick supports.
3145 This requires Emacs to be built with ImageMagick support.
3147 **** New function `imagemagick-types', defined if ImageMagick support
3148 is enabled, returns a list of image file extensions that your
3149 ImageMagick installation supports.
3151 **** New function `imagemagick-register-types' enables ImageMagick
3152 image types in Image mode and in `create-image' and other helper
3155 **** New option `imagemagick-types-inhibit' excludes certain
3156 ImageMagick image types from `imagemagick-register-types'.
3158 **** With ImageMagick support, there are extra Image mode commands to
3159 resize and rotate images: `image-transform-fit-to-height',
3160 `image-transform-fit-to-width', `image-transform-set-rotation', and
3161 `image-transform-set-scale'.
3163 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3164 passes it to the mail user agent function. This argument specifies an
3165 action for returning to the caller after finishing with the mail. For
3166 example, this is used by Rmail to optionally delete a mail window.
3168 ** XML and HTML parsing
3169 If Emacs is compiled with libxml2 support, there are two new
3170 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3171 and `libxml-parse-xml-region' (which parses XML). Both return an
3172 Emacs Lisp parse tree.
3174 ** Networking and encryption changes
3176 *** `open-network-stream' can now be used to open an encrypted stream.
3177 It now accepts an optional `:type' parameter for initiating a TLS
3178 connection, directly or via STARTTLS. To do STARTTLS, additional
3179 parameters (`:end-of-command', `:success', `:capabilities-command')
3180 must also be supplied.
3182 *** New library gnutls.el.
3183 The new function `gnutls-available-p' returns non-nil if Emacs is
3184 built with GnuTLS support. The main entry points are
3185 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3186 these functions through `open-network-stream', because that can
3187 upgrade connections through STARTTLS opportunistically or use plain
3188 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3191 *** New primitive `secure-hash' that supports many secure hash algorithms:
3192 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3193 sha1.el has been removed. The `sha1' feature is provided by default.
3197 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3199 ** Progress reporters can now "spin".
3200 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3201 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3202 time you call `progress-reporter-update' on that progress reporter,
3203 with a nil or omitted VALUE argument, the reporter message is
3204 displayed with a "spinning bar".
3206 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3207 being reverted, even if the buffer has a local `revert-buffer-function'.
3209 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3210 If delayed-warnings-list is non-nil, the command loop calls
3211 `delayed-warnings-hook' after `post-command-hook'. At present, this
3212 is only used by Emacs on some platforms to display warnings during
3213 startup, which might otherwise not be noticed. This uses the
3214 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3216 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3218 ** New function `make-composed-keymap' that constructs a new keymap
3219 from multiple input maps. You can use this to make a keymap that
3220 inherits from multiple maps, eg:
3221 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3223 ** New function `string-prefix-p'.
3224 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3226 ** New reader macro ## that stands for the empty symbol.
3227 This means that the empty symbol can now be read back. Also, #: by itself
3228 (when not immediately followed by a possible symbol character) stands for
3229 an empty uninterned symbol.
3231 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3233 ** The following functions and variables are obsolete:
3235 *** `tooltip-use-echo-area' is obsolete.
3236 Rather than setting this to t, disable Tooltip mode instead.
3238 *** buffer-substring-filters is obsolete.
3239 Use `filter-buffer-substring-functions' instead.
3241 *** `byte-compile-disable-print-circle' is obsolete.
3243 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3244 Use `post-command-hook' instead.
3246 *** `font-lock-maximum-size' is obsolete.
3249 * Changes in Emacs 24.1 on Non-Free Operating Systems
3251 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3252 and also when HOME is set to C:\ by default.
3254 ** New configure.bat options
3256 *** --enable-checking builds Emacs with extra runtime checks.
3258 *** --distfiles specifies files to be included in binary distribution.
3260 *** --without-gnutls disables automatic GnuTLS detection.
3262 *** --lib for general library linkage, works with the USER_LIBS build variable.
3264 ** New make target `dist' to create binary distribution for MS Windows.
3266 ** The Lisp function `w32-default-color-map' is now obsolete.
3267 (It is only used internally in the Emacs C code.)
3269 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3270 reappear on mouse-over. (Requires OS X 10.6 or later.)
3272 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3273 other platforms, rather than inserting its contents into the buffer.
3276 ----------------------------------------------------------------------
3277 This file is part of GNU Emacs.
3279 GNU Emacs is free software: you can redistribute it and/or modify
3280 it under the terms of the GNU General Public License as published by
3281 the Free Software Foundation, either version 3 of the License, or
3282 (at your option) any later version.
3284 GNU Emacs is distributed in the hope that it will be useful,
3285 but WITHOUT ANY WARRANTY; without even the implied warranty of
3286 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3287 GNU General Public License for more details.
3289 You should have received a copy of the GNU General Public License
3290 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3295 paragraph-separate: "[
\f]*$"