1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2015 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 documentation updates are complete.
19 (This means all relevant manuals in doc/ AND lisp doc-strings.)
20 --- means no change in the manuals is needed.
21 When you add a new item, use the appropriate mark if you are sure it applies,
22 otherwise leave it unmarked.
25 * Changes in Emacs 24.5
28 ** The default value of `history-length' has increased to 100.
31 ** The variable `redisplay-dont-pause' is obsolete.
34 * Changes in Specialized Modes and Packages in Emacs 24.5
37 ** `call-process-shell-command' and `process-file-shell-command'
38 don't take "&rest args" any more.
43 *** New option `erc-rename-buffers'.
46 *** New faces `erc-my-nick-prefix-face' and `erc-nick-prefix-face'.
49 *** `erc-format-@nick' displays all user modes instead of only op and voice.
52 *** The display of irc commands in the current buffer has been disabled.
55 *** `erc-version' now follows the Emacs version.
63 *** crisp.el - moved to elpa.gnu.org.
66 *** tpu-edt.el, ws-mode.el
67 These emulations of old editors are believed to be no longer relevant
68 - contact emacs-devel@gnu.org if you disagree.
71 *** vi.el, vip.el (try M-x viper instead)
74 * Installation Changes in Emacs 24.4
76 ** Emacs can now be compiled with ACL (access control list) support.
77 This happens by default if a suitable support library is found at
78 build time, like libacl on GNU/Linux. To prevent this, use the
79 configure option `--disable-acl'. See below for the features this provides.
81 ** Emacs can now be compiled with file notification support.
82 This happens by default if a suitable system library is found at
83 build time. To prevent this, use the configure option
84 `--without-file-notification'. See below for file-notify features.
85 This feature is not available for the Nextstep port.
87 ** Emacs can now be compiled with zlib support.
88 This happens by default if zlib is present, which it normally is.
89 To prevent this, use the configure option `--without-zlib'.
90 This provides the function `zlib-decompress-region'; see below for details.
92 ** The configure option `--without-compress-info' has been generalized,
93 and renamed to `--without-compress-install'. It now prevents compression
94 of _any_ files during installation.
96 ** The configure option `--with-crt-dir' has been removed.
97 It is no longer needed, as the crt*.o files are no longer linked specially.
99 ** Directories passed to configure option `--enable-locallisppath' are
100 no longer created during installation.
102 ** Emacs for Nextstep (Mac OS X, GNUstep) can be built with ImageMagick support.
103 This requires pkg-config to be available at build time.
106 * Startup Changes in Emacs 24.4
108 ** When initializing `load-path', an empty element in the EMACSLOADPATH
109 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
110 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
111 load-path (the one that would have been used if EMACSLOADPATH was unset).
112 This makes it easier to _extend_ the load-path via EMACSLOADPATH
113 (previously, EMACSLOADPATH had to specify the complete load-path,
114 including the defaults). (In older versions of Emacs, an empty element
115 was replaced by ".", so use an explicit "." now if that is what you want.)
117 ** The -L option, which normally prepends its argument to load-path,
118 will instead append, if the argument begins with `:' (or `;' on MS Windows;
119 i.e., `path-separator').
121 ** If you use either site-load.el or site-init.el to customize the dumped
122 Emacs executable, any changes to `load-path' that these files make
123 will no longer be present after dumping. To affect a permanent change
124 to `load-path', use the `--enable-locallisppath' option of `configure'.
126 ** The user option `initial-buffer-choice' can now specify a function
127 to set up the initial buffer.
130 * Changes in Emacs 24.4
132 ** Support for ACLs (access control lists).
133 This requires a suitable support library to be found at build time.
134 On GNU/Linux, the POSIX ACL interface is used via libacl.
135 On MS-Windows, the NT Security APIs are used to emulate the POSIX interface.
136 ACLs are extended file attributes, used e.g. for finer-grained permissions.
138 *** Emacs preserves the ACL entries of files when backing up.
140 *** New functions `file-acl' and `set-file-acl' get and set file ACLs.
142 ** Support for menus on text-mode terminals.
143 If the terminal supports a mouse, clicking on the menu bar, or on
144 sensitive portions of the mode line or header line, will drop down the
145 menu defined at that position. Likewise, clicking C-mouse-1, C-mouse-2, or
146 C-mouse-3 on the text area will pop up the menus defined for those locations.
148 If the text terminal does not support a mouse, you can activate the
149 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
151 If you want the previous behavior, where F10 invoked `tmm-menubar',
152 customize the option `tty-menu-open-use-tmm' to a non-nil value.
153 (Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
156 ** New option `load-prefer-newer' affects how the `load' function chooses
157 the file to load. If this is non-nil, then when both .el and .elc
158 versions of a file exist, and the caller did not explicitly specify
159 which one to load, then the newer file is loaded. The default, nil,
160 means to always load the .elc file.
162 ** Multi-monitor support
164 *** New functions `display-monitor-attributes-list' and
165 `frame-monitor-attributes' can be used to obtain information about
166 each physical monitor on multi-monitor setups.
168 *** The functions `display-pixel-width' and `display-pixel-height' now
169 behave consistently among the platforms: they return the pixel width
170 or height for all physical monitors associated with the given display
171 as if they were on X. To get information for each physical
172 monitor, use the new functions above. Similar notes also apply to
173 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
174 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
176 ** New function `zlib-decompress-region', which decompresses gzip- and
177 zlib-format compressed data using built-in zlib support (if available).
179 ** The *Messages* buffer is created in `messages-buffer-mode',
180 a new major mode, with read-only status. Any code that might create
181 the *Messages* buffer should call the function `messages-buffer' to do
182 so and set up the mode.
184 ** The cursor stops blinking after 10 blinks (by default) on X and Nextstep.
185 You can change the default by customizing `blink-cursor-blinks'.
187 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
188 This affects View mode, etc.
190 ** The default value of `make-backup-file-name-function' is no longer nil.
191 Instead it defaults to a function that does what the nil value used to.
195 *** The command `apropos-variable' is renamed to `apropos-user-option'.
196 `apropos-user-option' shows all user options, while `apropos-variable'
197 shows all variables. When called with a universal prefix argument,
198 the two commands swap their behaviors. When `apropos-do-all' is
199 non-nil, they output the same results.
201 *** The key `?' now describes prefix bindings, like `C-h'.
203 *** The command `describe-function' has been extended for EIEIO.
204 Running it on constructors will show a full description of the
205 generated class. For generic functions, it will show all
206 implementations together with links to the source. The old commands
207 `describe-class', `describe-constructor' and `describe-generic' were
210 *** The function `quail-help' is no longer an interactive command.
211 Use `C-h C-\' (`describe-input-method') instead.
213 ** Frame and window handling
215 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
216 bound to <f11> and M-<f10>, respectively.
218 *** New hooks `focus-in-hook', `focus-out-hook'.
219 These are normal hooks run when an Emacs frame gains or loses input focus.
221 *** The function `window-in-direction' now takes additional arguments
222 for specifying a reference point, wrapping the selection around frame
223 borders, and specifying ways to select the minibuffer window.
225 *** Emacs can now change frame sizes in units of pixels, rather than
226 text rows or columns. When maximizing a frame or making it fullscreen,
227 remaining extra pixels are no longer given to the minibuffer, the rightmost
228 fringe, or other unusable space, but are distributed among the text
229 areas of the frame's windows. If the new option `frame-resize-pixelwise'
230 is non-nil, all frame size changes happen pixelwise and set the
231 corresponding size hints for the window manager.
233 *** Emacs can now change window sizes in units of pixels.
234 Mouse-dragging a mode line or window divider now changes the size of
235 adjacent windows pixelwise. If the new option `window-resize-pixelwise'
236 is non-nil, functions like `balance-windows-area' and `fit-window-to-buffer'
237 resize windows pixelwise. Most functions for changing or accessing
238 window sizes now have an additional argument that allows changes to apply,
239 or values to be returned, in pixels instead of lines/columns.
241 *** The functions `window-body-height' and `window-body-width' now never
242 count partially visible lines or columns if called with a nil PIXELWISE
245 *** Emacs can now draw dividers between adjacent windows. To put
246 dividers between side-by-side/vertically stacked windows customize the
247 frame parameters `right-divider-width' and `bottom-divider-width' to
248 some positive integer. You can drag dividers with the mouse (they show
249 a corresponding cursor when the mouse hovers over them). You can change
250 the appearance of dividers by customizing the faces `window-divider',
251 `window-divider-first-pixel', and `window-divider-last-pixel'. The last
252 two are useful to provide a 3D effect, or to better distinguish dividers
253 from surrounding display objects.
255 *** New functions to return the pixel sizes of window components, namely
256 `window-scroll-bar-width', `window-mode-line-height',
257 `window-header-line-height', `window-right-divider-width', and
258 `window-bottom-divider-width'.
260 *** The new function `window-text-pixel-size' returns the size of the
261 text of a window's buffer in pixels. This allows functions like
262 `fit-frame-to-buffer' and `fit-window-to-buffer' to accurately fit a
263 window to its buffer as it will be displayed.
265 *** `fit-window-to-buffer' can now resize windows in both dimensions.
266 This behavior is controlled by the new option
267 `fit-window-to-buffer-horizontally'. The new option
268 `fit-frame-to-buffer' allows you to fit the window's frame to its buffer.
270 *** `fit-frame-to-buffer' now fits frames in both dimensions. The new
271 options `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes'
272 control the size of the frame and its position on screen.
274 *** Temp Buffer Resize Mode can now adjust the height and width of
275 windows and frames. The new option `temp-buffer-max-width' allows you to
276 control the width of temporary buffer windows. Moreover, if the new
277 option `fit-frame-to-buffer' is non-nil and the buffer appears in the
278 root window of a frame, Temp Buffer Resize Mode will try to adjust the
279 width and/or height of the frame.
281 *** `split-window' is now a non-interactive function, not a command.
282 As a command, it was a special case of `C-x 2' (`split-window-below'),
283 and as such superfluous. After being reimplemented in Lisp, its
284 interactive form was mistakenly retained.
286 *** The functions `window-size' and `window-total-size' now have an
287 optional argument to return a rounded size value.
289 *** `window-state-put' now allows you to put a window state into internal
292 *** New option `scroll-bar-adjust-thumb-portion'.
293 Available only on X, this option allows you to control over-scrolling
294 using the scroll bar (i.e., dragging the thumb down even when the end
295 of the buffer is visible).
297 *** New display actions functions for `display-buffer':
299 **** `display-buffer-at-bottom' chooses or creates a window at the
300 bottom of the selected frame.
302 **** `display-buffer-no-window' to not display the buffer in a window.
304 *** New display action alist entry `allow-no-window' to indicate the
305 caller of `display-buffer' is ready to handle the case of not displaying
306 the buffer in a window.
308 *** `display-buffer-in-previous-window' is now a member of
309 `display-buffer-fallback-action'.
313 *** `eval-defun' on an already defined defcustom calls the :set function,
316 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
317 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
318 zero prefix argument. This disables truncation of lists in the output,
319 equivalent to setting `(eval-expression-)print-length' and
320 `(eval-expression-)print-level' to nil. Additionally, it causes integers
321 to be printed in other formats (octal, hexadecimal, and character).
323 *** New hook `eval-expression-minibuffer-setup-hook' run by
324 `eval-expression' on entering the minibuffer.
326 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
327 because it affects caching of paragraph scanning results as well.
328 There is no reason to set this to nil except for debugging purposes.
330 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
331 and works for git too, if you fetch the repository notes.
333 ** The default value of `comment-use-global-state' is now t,
334 and this variable has been marked obsolete.
336 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
338 ** The option `set-mark-default-inactive' has been deleted.
339 This unfinished feature was introduced by accident in Emacs 23.1;
340 simply disabling Transient Mark mode does the same thing.
343 * Editing Changes in Emacs 24.4
347 *** `electric-indent-mode' is now enabled by default.
348 Typing RET reindents the current line and indents the new line.
349 `C-j' inserts a newline but does not indent. In some programming modes,
350 additional characters are electric (eg `{').
352 *** New buffer-local `electric-indent-local-mode'.
354 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
355 When invoked without a prefix argument, it now activates a transient
356 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
357 the text indentation in the region. Typing any other key resumes
358 normal editing behavior.
360 *** `tab-stop-list' is now implicitly extended to infinity by repeating
361 the last step. Its default value is changed to nil, which means a tab
362 stop every `tab-width' columns.
364 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
365 In other words, if you visit two files that have the same base name,
366 then rather than creating buffers basename and basename<2>,
367 Emacs uses basename<dirA> and basename<dirB>. To change this,
368 customize `uniquify-buffer-name-style'. Set it to nil for the old behavior.
370 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
371 Most commands are still unaware of it, but kill/yank do work on the rectangle.
373 ** New option `visual-order-cursor-movement'.
374 If this is non-nil, cursor motion with arrow keys will follow the
375 visual order of characters on the screen: <left> always moves to the
376 left, <right> always moves to the right, disregarding the surrounding
377 bidirectional context.
379 ** New command `delete-duplicate-lines'.
380 This searches the region for identical lines, and removes all but one
381 copy of each repeated line. The lines need not be sorted.
383 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
384 When called in succession, it cycles between spacing conventions:
385 one space, no spaces, original spacing.
387 ** `blink-matching-paren' now only highlights the matching open-paren
388 by default, instead of moving the cursor. Set this variable to `jump' to
389 restore the old behavior.
391 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
392 a line after a one-letter word, which is an error in some typographical
393 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
397 *** All interactive commands that read a register (`copy-to-register', etc.)
398 now display a temporary window after `register-preview-delay' seconds
399 that summarizes existing registers. To disable this, set that option to nil.
400 Interactive commands that read registers and want to make use of this
401 should use `register-read-with-preview' to read register names.
403 *** New command `frameset-to-register' bound to `C-x r f', replacing
404 `frame-configuration-to-register'. It offers similar functionality,
405 plus enhancements like the ability to restore deleted frames.
406 (`frame-configuration-to-register' still exists, but no longer has a
409 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
413 * Changes in Specialized Modes and Packages in Emacs 24.4
415 ** Backtrace and debugger
417 *** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
418 display of local variables of the current stack frame.
420 *** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
421 the lexical environment when evaluating the code in the context at point
422 (and so allows you to access lexical variables).
424 *** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
426 ** Battery information can now be retrieved from BSD's `apm' utility.
428 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
432 *** Calc by default now uses the Gregorian calendar for all dates, and
433 uses January 1, 1 AD as its day number 1. Previously Calc used the
434 Julian calendar for dates before September 14, 1752, and it used
435 December 31, 1 BC as its day number 1; the new scheme is more
436 consistent with Calendar's calendrical system and day numbering.
438 *** The new option `calc-gregorian-switch' lets you configure if
439 (and when) Calc switches from the Julian to the Gregorian calendar.
441 *** Support for ISO 8601 dates.
443 ** Calendar and Diary
445 *** New faces `calendar-weekday-header', `calendar-weekend-header',
446 and `calendar-month-header'.
448 *** New option `calendar-day-header-array'.
450 *** New variable `diary-from-outlook-function', used by the command
451 `diary-from-outlook'.
453 *** The variable `calendar-font-lock-keywords' is obsolete.
459 **** The cpp-root project now supports executing a compile command.
460 It can be set through the new :compile-command slot or the
461 buffer-local variable `compile-command'.
463 **** Better selection of include directories for the 'linux' project.
464 Include directories now support out-of-tree build directories and
465 target architecture auto-detection.
469 **** Improved detection of used namespaces in current scope in C++.
471 **** Parsing of default values for variables and function arguments in C/C++.
472 They are also displayed by the summarize feature in the mode line.
474 **** Improved parsing of function pointers in C/C++.
475 This also includes parsing of function pointers as function arguments.
477 **** Parsing of C/C++ preprocessor macros that open new scope.
478 For example, this enables parsing of macros that open new namespaces.
480 **** Support for 'this' pointer in inline member functions in C++.
484 *** Support for completion, ElDoc, and Flycheck has been added.
486 *** The current CFEngine syntax is parsed from "cf-promises -s json".
487 There is a fallback syntax available if you don't have cf-promises or
488 if your version doesn't support that option. See option `cfengine-cf-promises'.
492 *** New macro `cl-tagbody'.
493 This executes statements while allowing for control transfer to labels.
495 *** letf is now just an alias for cl-letf.
499 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
500 Hence, you can now enable it independently from those modes, and from
501 `transient-mark-mode'.
503 *** `cua-highlight-region-shift-only' is now obsolete.
504 You can disable `transient-mark-mode' to get the same result.
506 *** CUA's rectangles can now be used without CUA by calling the command
507 `cua-rectangle-mark-mode'.
509 ** Delete Selection mode can now be used without Transient Mark mode.
513 *** `desktop-save-mode' by default now auto-saves an existing desktop file
514 after `desktop-auto-save-timeout'. To disable this, customize that option
517 *** Desktop now saves and restores the frame/window configuration.
518 To disable this, set `desktop-restore-frames' to nil.
519 See also related options `desktop-restore-reuses-frames',
520 `desktop-restore-in-current-display', and `desktop-restore-forces-onscreen'.
522 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
523 such as file ownership or permissions, are visible in Dired buffers.
524 See the new options `dired-hide-details-hide-symlink-targets' and
525 `dired-hide-details-hide-information-lines' for customizing what to hide.
527 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
528 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
529 The results display in the mode line.
531 ** Electric Pair mode
533 *** New option `electric-pair-preserve-balance', enabled by default.
534 If non-nil, pairing/skipping only kicks in when that help the balance
535 of parentheses and quotes; i.e., the buffer should end up at least as
538 You can further control this behavior by adjusting the predicates
539 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
541 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
542 In `electric-pair-mode', the commands `backward-delete-char' and
543 `backward-delete-char-untabify' are now bound to electric variants
544 that delete the closer when invoked between adjacent pairs.
546 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
547 In `electric-pair-mode', inserting a newline between adjacent pairs
548 opens an extra newline after point, which is indented if
549 `electric-indent-mode' is also set.
551 *** New option `electric-pair-skip-whitespace', enabled by default.
552 This controls if skipping over closing delimiters should jump over any
553 whitespace slack. Setting it to `chomp' makes it delete this
554 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
556 *** New variables control the pairing in strings and comments.
557 You can customize `electric-pair-text-pairs' and
558 `electric-pair-text-syntax-table' to tweak pairing behavior inside
559 strings and comments.
561 ** New EPA option `epa-mail-aliases'.
562 You can set this to a list of email address aliases that `epa-mail-encrypt'
563 should use to find keys.
565 ** New ERC option `erc-accidental-paste-threshold-seconds'.
566 If set to a number, this can be used to avoid accidentally pasting large
567 amounts of data into the ERC input.
569 ** New ERT macro `skip-unless' allows skipping ERT tests.
573 *** `eshell' now supports visual subcommands and options.
574 Eshell has been able to handle "visual" commands (interactive,
575 non-line oriented commands such as top that require display
576 capabilities not provided by eshell) by running them in an Emacs
577 terminal emulator. See `eshell-visual-commands'.
579 This feature has been extended to subcommands and options that make a
580 usually line-oriented command a visual command. Typical examples are
581 "git log" and "git <command> --help", which display their output in a
582 pager by default. See `eshell-visual-subcommands' and `eshell-visual-options'.
584 *** New Eshell-Tramp module.
585 External su and sudo commands are now the default; the internal,
586 Tramp-using variants can still be used by enabling the eshell-tramp module.
588 ** New F90 mode option `f90-smart-end-names'.
590 ** New option `gnutls-verify-error', if non-nil, means that Emacs
591 should reject SSL/TLS certificates that GnuTLS determines as invalid.
592 (This option defaults to nil at present, but this is expected to change
593 in a future release.)
597 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
598 the symbol near point.
600 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
601 will cycle through faces in `hi-lock-face-defaults' without prompting.
603 ** Icomplete is now more similar to Ido.
605 *** Icomplete by default now applies to all forms of minibuffer completion.
606 The variable `icomplete-with-completion-tables' (now a user option)
607 controls this. To restore the old behavior, set it back to
608 '(internal-complete-buffer).
610 *** You can navigate through and select completions using the keys
611 from `icomplete-minibuffer-map'.
613 *** The string that separates potential completions is now a customizable
614 option (`icomplete-separator'). The default is " | " rather than ",".
616 *** New face `icomplete-first-match'; and new options
617 `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
619 *** The option `icomplete-show-key-bindings' has been removed.
623 *** An Ido user manual is now included.
625 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
626 This means to use virtual buffers if the current ido input does not match
629 *** The variable `ido-decorations' can optionally have two new elements,
630 which are the brackets to use around the sole remaining completion.
634 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
635 visit the next image file and the previous image file in the same
636 directory, respectively.
638 *** New commands to show specific frames of multi-frame images.
639 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
640 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
642 *** New commands to speed up, slow down, or reverse animation.
643 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
644 speed up and slow down the animation. `a r' (`image-reverse-speed')
645 to reverse it and `a 0' (`image-reset-speed') to reset it.
647 *** The command `image-mode-fit-frame' deletes other windows.
648 When toggling, it restores the frame's previous window configuration.
649 It also has an optional frame argument, which can be used by Lisp
650 callers to fit the image to a frame other than the selected frame.
652 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
656 *** New Info face `info-index-match', used to highlight matches in index
657 entries displayed by `Info-index-next', `Info-virtual-index' and
660 *** The Info-edit command is obsolete. Editing Info nodes by hand
661 has not been relevant for some time.
665 *** New option `js-switch-indent-offset'.
667 *** Better indentation of multiple-variable declarations.
668 If a declaration spans several lines, variables on the following lines
669 are lined up to the first one.
671 *** Recognition and better indentation of continuations in array comprehensions.
673 ** MH-E has been updated to version 8.6 - see separate MH-E-NEWS file.
677 *** Font locking for Texinfo comments and new keywords.
679 *** Completion in Octave file buffers.
683 *** Jump to definition.
685 *** Documentation lookup/search.
687 ** OPascal mode is the new name for Delphi mode
689 *** All delphi-* variables and functions have been renamed to opascal-*.
690 Obsolete aliases exist for those likely to have been used externally.
692 *** The option `delphi-newline-always-indents' has been removed.
693 Use `electric-indent-mode' instead.
695 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
699 *** The package library now supports digital signing of packages.
700 Maintainers of package archives should consider signing their packages
703 **** If the user option `package-check-signature' is non-nil,
704 Emacs tries to check package signatures at install time.
705 The value `allow-unsigned' allows installation of unsigned packages.
707 **** The user option `package-unsigned-archives' lists archives where
708 Emacs will not try to check signatures.
710 *** New option `package-pinned-packages'. This is useful if you have multiple
711 archives enabled, with more than one offering a given package that you want.
713 *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
714 to filter the list of packages by a keyword.
716 *** In the `describe-package' buffer, there are now buttons listing the
717 keywords related to the package. Click on a button to see other packages
718 related to that keyword.
720 *** The format of `archive-contents' files, generated by package
721 repositories, has changed to allow a new (fifth) element in the data
722 vectors, containing an associative list with extra properties.
723 (For example, `describe-package' uses the `:url' extra property to
724 display a "Homepage" header.)
726 ** In Prolog mode, `prolog-use-smie' has been removed,
727 along with the non-SMIE indentation code.
731 *** Out of the box support for CPython, iPython and readline based shells.
732 **** `python-shell-completion-module-string-code' is no longer used.
734 *** Automatic shell prompt detection. New user options:
735 **** `python-shell-interpreter-interactive-arg'.
736 **** `python-shell-prompt-detect-enabled'.
737 **** `python-shell-prompt-detect-failure-warning'.
738 **** `python-shell-prompt-input-regexps'.
739 **** `python-shell-prompt-output-regexps'.
741 *** Python shell support for remote hosts via tramp.
743 *** Correct display of line numbers for code sent to the Python shell.
747 *** The new command `remember-notes' creates a buffer that is saved on exit.
748 You can use it as a more permanent *scratch* buffer.
750 *** Remember can now store notes in separate files.
751 To use this, add `remember-store-in-files' to the `remember-handler-functions'
752 option. The files are saved in `remember-data-directory' using
753 names specified by `remember-directory-file-name-format'.
757 *** Customize `rmail-mbox-format' to influence some minor aspects of
758 how Rmail displays non-MIME messages.
760 *** The `unrmail' command now converts from BABYL to mboxrd format,
761 rather than mboxo. Customize `unrmail-mbox-format' to change this.
765 *** Improved syntax highlighting and indentation.
767 *** New `electric-indent-mode' integration.
769 *** New option `ruby-encoding-magic-comment-style'.
771 *** New option `ruby-custom-encoding-magic-comment-template'.
773 *** New option `ruby-align-to-stmt-keywords'.
775 *** New option `ruby-align-chained-calls'.
777 *** More Ruby file types have been added to `auto-mode-alist'.
779 ** Search and Replace
781 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
782 starts a symbol (identifier) incremental search forward with the
783 symbol found near point added to the search string initially.
785 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
786 and adds it to the search string.
788 *** `M-s i' in Isearch mode toggles whether search matches invisible text.
790 *** `query-replace' skips invisible text when `search-invisible' is nil,
791 and opens overlays with hidden text when `search-invisible' is `open'.
793 *** A negative prefix argument of replacement commands replaces backward.
794 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
795 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
797 *** By default, prefix arguments do not now terminate Isearch mode.
798 Set `isearch-allow-prefix' to nil to restore the old behavior.
800 *** More Isearch commands accept prefix arguments, namely
801 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
804 *** Word search now matches whitespace at the beginning/end
805 of the search string if it contains leading/trailing whitespace.
806 In an incremental word search or when using a non-nil LAX argument
807 of `word-search-regexp', the lax matching can also match part of
808 the first word (in addition to the lax matching of the last word).
809 The same rules are now applied to the symbol search, with the difference
810 that it matches symbols, and non-symbol characters between symbols.
812 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
814 ** The shell.el option `explicit-bash-args' includes --noediting by default.
815 All non-ancient Bash versions support this option.
819 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
821 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
825 *** You can customize the SMIE indentation of a mode via `smie-config'.
826 The command `smie-config-guess' can help you derive the appropriate
827 indentation settings, if you provide it with an indented sample file.
828 Use `smie-config-save' to save the result.
830 *** You can customize the SMIE indentation of a file by adding an entry to
831 the file's local variables of the form: `eval: (smie-config-local '(RULES))'.
833 *** New commands `smie-config-show-indent' and `smie-config-set-indent'.
837 *** Improved login monitoring and appropriate response to login failures.
838 New variable `sql-login-delay' defines maximum wait time for a connection.
841 SQL*Plus script placeholders are properly highlighted and identified
842 in `sql-placeholders-filter'. When starting SQL*Plus, `sql-oracle-options'
843 are passed before the logon parameter, as required. The default now
844 includes `-L', to limit the number of logon attempts per invocation.
846 ** New Term mode option `term-suppress-hard-newline'.
848 ** Todo mode has been rewritten and enhanced.
849 The Todo mode user manual describes all commands and most user
850 options. To support some of these features, a new file format is
851 used, which is incompatible with the old format; however, you can
852 convert old todo and done item files to the new format on initializing
853 the first new todo file, or at any later time with the provided
854 conversion command. The previous version of todo-mode.el has been
855 renamed to otodo-mode.el and is now obsolete. New features include:
857 *** Support for multiple todo files and archive files of done items.
859 *** Renaming, reordering, moving, merging, and deleting categories.
861 *** Sortable tabular summaries of categories and the item types they contain.
863 *** Cross-category lists of items filtered by specific criteria.
865 *** More fine-grained interaction with the Emacs diary, by being able to
866 decide for each todo item whether it appears in the Fancy Diary display.
868 *** Highly flexible new item insertion and item editing.
870 *** Moving items between categories, storing done items in their category
871 or in archive files, undoing or unarchiving done items.
873 *** Reprioritizing items by inputting a numerical priority.
875 *** Extensive customizability of operation and display, including many faces.
879 *** `trace-function' and `trace-function-background' no longer prompt for
880 the output buffer. Unless you use a prefix argument, they output to
883 *** With a prefix argument, `trace-function' and `trace-function-background'
884 will prompt for a "context". This is a Lisp expression, whose value at the
885 time the function is entered/exited is printed along with the function's
890 *** New connection method "adb", which allows to access Android
891 devices by the Android Debug Bridge. The variable `tramp-adb-program'
892 can be used to adapt the path of the "adb" program, if needed.
894 *** Handlers for `file-acl' and `set-file-acl' for remote machines
895 that support POSIX ACLs.
897 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
898 for remote machines that support filesystem notifications.
900 *** The experimental url syntax for remote file names has been removed.
902 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
903 "scpc" and "rsyncc" are discontinued. The ssh option
904 "ControlMaster=auto" is set automatically in all ssh-based methods,
905 when possible. See `tramp-use-ssh-controlmaster-options'.
907 ** New URL command `url-cookie-list' displays the current cookies,
908 and allows you to interactively remove cookies.
910 ** VC and related modes
912 *** In VC directory mode, `D' displays diffs between VC-controlled
913 whole tree revisions.
915 *** In VC directory mode, `L' lists the change log for the current VC
916 controlled tree in a window.
918 *** In VC directory mode, `I' shows a log of changes that will be
919 received with a pull operation.
921 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
922 under current version control system. When called with a prefix
923 argument, you can remove a file from the ignored file list.
927 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
929 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
931 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
932 are obsolete. Customize the `woman-*' faces instead.
934 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
936 ~/.emacs.d/timelog replaces ~/.timelog
937 ~/.emacs.d/vip replaces ~/.vip
938 ~/.emacs.d/viper replaces ~/.viper
939 ~/.emacs.d/ido.last replaces ~/.ido.last
940 ~/.emacs.d/kkcrc replaces ~/.kkcrc
941 ~/.emacs.d/quickurls replaces ~/.quickurls
942 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
943 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
944 ~/.emacs.d/places replaces ~/.emacs-places
945 ~/.emacs.d/shadows replaces ~/.shadows
946 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
947 ~/.emacs.d/strokes replaces ~/.strokes
948 ~/.emacs.d/notes replaces ~/.notes
949 ~/.emacs.d/type-break replaces ~/.type-break
950 Also the following files used by the now obsolete otodo-mode.el:
951 ~/.emacs.d/todo-do replaces ~/.todo-do
952 ~/.emacs.d/todo-done replaces ~/.todo-done
953 ~/.emacs.d/todo-top replaces ~/.todo-top
957 *** iswitchb.el; use icomplete-mode.
959 *** longlines.el; use visual-line-mode.
965 *** terminal.el; use term.el instead.
967 *** the old version of todo-mode.el (renamed to otodo-mode.el).
969 *** xesam.el (owing to the cancellation of the XESAM project).
971 *** yow.el; use fortune.el or cookie1.el instead.
974 * New Modes and Packages in Emacs 24.4
976 ** New package eww.el provides a built-in web browser.
977 This requires Emacs to have been compiled with libxml2 support.
979 ** New package nadvice.el offers lighter-weight advice facilities.
982 *** `add-function'/`remove-function', which can be used to add/remove code on
983 any function-carrying place, such as process filters or `<foo>-function' hooks.
985 *** `advice-add'/`advice-remove' to add/remove a piece of advice on a named
986 function, much like `defadvice' does.
988 ** New package frameset.el provides a set of operations to save a frameset
989 (the state of all or a subset of the existing frames and windows, somewhat
990 similar to a frame configuration), both in-session and persistently, and
991 restore it at some point in the future.
993 ** New package filenotify.el provides an interface for file system
994 notifications. It requires that Emacs be compiled with one of the
995 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
997 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
998 display specified symbols as composed characters. E.g., in Emacs Lisp mode,
999 this replaces the string "lambda" with the Greek lambda character.
1001 ** New minor mode `superword-mode', which overrides the default word motion
1002 commands to treat "symbol_words" as a single word, similar to what
1003 `subword-mode' does.
1006 * Incompatible Lisp Changes in Emacs 24.4
1008 ** The default file coding for Emacs Lisp files is now utf-8.
1009 (See `file-coding-system-alist'.) In most cases, this change is
1010 transparent, but files that contain unusual characters without
1011 specifying an explicit coding system may fail to load with obscure
1012 errors. You should either convert them to utf-8 or add an explicit
1015 ** Default process filters and sentinels are not nil any more.
1016 Instead they default to a function that does what the nil value used to do.
1018 ** Overlay priority does not have to be nil or a non-negative integer.
1019 Overlay priority can be other kinds of Lisp objects. We didn't yet
1020 decide whether other types of values are stable enough, and therefore
1021 don't feel it's right to document them. For now, don't assume in your
1022 code that the values of overlay priority can only be either nil or an
1023 integer, always test them with an appropriate predicate to be one or
1024 the other. If you need to sort arbitrary overlays into priority
1025 order, `overlays-at' can now optionally do this.
1026 You should still only specify integer priorities on overlays you create.
1028 ** The cars of the elements in `interpreter-mode-alist' are now
1029 treated as regexps rather than literal strings.
1031 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
1032 It used to disable the minor mode, major mode, and text-property keymaps,
1033 whereas now it simply has higher precedence.
1035 ** `kill-region' has lost its `yank-handler' optional argument.
1037 ** `(input-pending-p)' no longer runs other timers that are ready to run.
1038 The new optional CHECK-TIMERS parameter allows for the prior behavior.
1040 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
1042 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
1043 Some languages match those as »...«, and others as «...», so it is
1044 better for Emacs to stay neutral by default.
1046 ** `read-event' does not always decode chars in ttys any more. As was the case
1047 in Emacs 22 and before, `read-event' (and `read-char') by default read raw
1048 bytes from the terminal. If you want to read decoded chars instead (as was
1049 always the case in Emacs-23, for example), pass a non-nil
1050 `inherit-input-method' argument.
1052 ** In `symbol-function', nil and "unbound" are indistinguishable.
1053 `symbol-function' does not signal a `void-function' error any more.
1054 To determine if a symbol's function definition is void, use `fboundp'.
1056 ** `defadvice' does not honor the `freeze' flag and cannot advise
1057 special-forms any more.
1059 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1060 when lexical binding is enabled. Previously, VAR was bound to nil,
1061 which often led to spurious unused-variable warnings.
1063 ** The return value of `backup-buffer' has changed.
1064 The second argument is no longer an SELinux context, instead it is an
1065 alist of extended attributes as returned by the new function
1066 `file-extended-attributes'. The attributes can be applied to another
1067 file using `set-file-extended-attributes'.
1069 ** By default `copy-file' no longer copies file permission bits to an
1070 existing destination; and it sets the file permission bits of a newly
1071 created destination to those of the source, masked by the default file
1072 permissions. To copy the file permission bits, pass t as the
1073 PRESERVE-PERMISSIONS argument of `copy-file'.
1075 ** `visited-file-modtime' now returns -1 for nonexistent files.
1076 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1077 in the presence of files with negative time stamps.
1079 ** Frame-local variables that affect redisplay do not work any more.
1080 More specifically, redisplay does not bother to check for a frame-local
1081 value when looking up variables.
1083 ** In compiled Lisp files, the header no longer includes a timestamp.
1085 ** The option `inhibit-local-menu-bar-menus' has been removed.
1088 * Lisp Changes in Emacs 24.4
1090 ** Change to the Emacs Lisp coding conventions: the package descriptor
1091 and name of global variables, constants, and functions should be separated
1092 by two hyphens if the symbol is not meant to be used by other packages.
1094 ** The second argument of `eval' can now specify a lexical environment.
1096 ** New macro `define-alternatives' can be used to define generic commands.
1097 Generic commands are interactive functions whose implementation can be
1098 selected among several alternatives, as a matter of user preference.
1100 ** Numeric comparison functions =, <, >, <=, >= can now take many arguments.
1102 ** New functions `special-form-p' and `macrop'.
1104 ** New macro `with-eval-after-load'.
1105 This is like the old `eval-after-load', but better behaved.
1107 ** If you give a symbol a `defalias-fset-function' property, `defalias'
1108 on that symbol will use the associated value as a function to call
1111 ** New variable `enable-dir-local-variables'.
1112 Directory-local variables are ignored if this is nil. This may be
1113 useful for modes that want to ignore directory-locals while still
1114 respecting file-local variables.
1116 ** `read-regexp' now uses the new variable `read-regexp-defaults-function'
1117 as a function to call to provide default values.
1119 ** New functions `group-gid' and `group-real-gid'.
1121 ** New function `get-pos-property'.
1123 ** New hook `pre-redisplay-function'.
1125 ** `byte-compile-interactive-only-functions' is now obsolete.
1126 To specify that a command should only be called interactively, give it
1127 a non-nil `interactive-only' property.
1129 ** New function `string-suffix-p'.
1131 ** `split-string' now takes an optional argument TRIM.
1132 The value, if non-nil, is a regexp that specifies what to trim from
1133 the start and end of each substring.
1137 *** The separator used by `completing-read-multiple' is now a regexp.
1138 The default `crm-separator' has been changed to allow surrounding spaces
1141 *** New function `completion-table-with-cache' is a wrapper for
1142 `completion-table-dynamic' that caches the result of the last lookup.
1144 *** New function `completion-table-merge' to combine several
1145 completion tables by merging their completions.
1147 *** The `common-substring' argument of `display-completion-list',
1148 which has been documented as obsolete since Emacs 23.1, is now _really_
1149 obsolete, and no longer advertised. Instead either call
1150 `completion-hilit-commonality' to add the highlighting; or use
1151 `completion-all-completions', which returns highlighted strings.
1153 ** Encoding and decoding of text
1155 *** New coding-system `prefer-utf-8'.
1156 This is like `undecided' but prefers UTF-8 on decoding if the text to
1157 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1158 any non-ASCII characters are automatically encoded as UTF-8.
1160 *** New attributes of coding-systems whose type is `undecided'.
1161 Two new attributes, `:inhibit-null-byte-detection' and
1162 `:inhibit-iso-escape-detection', determine how to detect encoding of
1163 text that includes null bytes and ISO-2022 escape sequences, respectively.
1164 Each of these attributes can be either nil, zero, or t. If t, decoding
1165 text ignores null bytes and ISO-2022 sequences, respectively. If nil,
1166 null bytes cause text to be decoded with no-conversion, and ISO-2022
1167 sequences cause Emacs to assume the text is encoded in one of the ISO-2022
1168 encodings, such as iso-2022-7bit. If zero, Emacs consults the variables
1169 `inhibit-null-byte-detection' and `inhibit-iso-escape-detection'.
1170 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1171 UTF-8 encoding and decoding, whenever possible.
1173 These attributes are only meaningful for coding-systems of type `undecided'.
1174 (The type of a coding-system is determined by its `:coding-type' attribute
1175 and can be accessed by calling the `coding-system-type' function.)
1179 *** New function `define-error'.
1181 *** `with-demoted-errors' takes an additional argument `format'.
1183 *** Errors from timer functions are no longer silently discarded,
1184 but are reported as messages. So you may see "Error running timer"
1185 messages from code that was failing silently till now. Set
1186 `debug-on-error' non-nil to get a real error and a backtrace.
1190 *** Face specs set via Custom themes now replace the `defface' spec
1191 rather than inheriting from it. In other words, setting a face via a
1192 theme now behaves like setting it via Customize: you only need to
1193 specify the attributes that you want, you don't need to unset those
1194 that you don't want.
1196 *** The function `face-spec-set' is now like `setq' for face specs.
1197 Its third arg now accepts values specifying a face spec type (defface,
1198 custom, or override spec), and the relevant spec is set accordingly.
1200 *** New face spec attribute :distant-foreground
1201 specifies foreground to use if background color is near the foreground
1202 color that would otherwise have been used.
1204 *** New function `add-face-text-property', which can be used to
1205 conveniently prepend/append new face properties.
1207 *** New face characteristic (supports :underline (:style wave))
1208 specifies whether or not the terminal can display a wavy line.
1212 *** Support for filesystem notifications.
1213 Emacs now supports notifications of filesystem changes, such as
1214 creation, modification, and deletion of files. This requires the
1215 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1216 MS-Windows systems, this is supported for Windows XP and newer.
1218 *** The 9th element returned by `file-attributes' is now unspecified.
1219 Formerly, it was t if the file's gid would change if file were deleted
1220 and recreated. This value has been inaccurate for years on many
1221 platforms, and nobody seems to have noticed or cared.
1223 *** The 6th argument to `copy-file' has been renamed to
1224 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1225 Unix file permission bits as well as SELinux context.
1227 *** The function `file-ownership-preserved-p' now has an optional
1228 argument GROUP which causes it check for file group too. This can be
1229 used in place of the 9th element of `file-attributes'.
1231 *** The function `set-visited-file-modtime' now accepts a 0 or -1 argument,
1232 with the same interpretation as the returned value of `visited-file-modtime'.
1236 *** `image-animated-p' is now `image-multi-frame-p'.
1237 It returns non-nil for any image that contains multiple frames,
1238 whether or not it specifies a frame delay.
1240 *** New variable `image-default-frame-delay' gives the frame delay for
1241 animated images which do not specify a frame delay.
1243 *** New functions `image-current-frame' and `image-show-frame' for getting
1244 and setting the current frame of a multi-frame image.
1248 *** ImageMagick images now support the :max-width and :max-height keywords.
1250 *** When using `create-image' with image data, you can pass a :format
1251 attribute (via the property-list argument) in order to help
1252 ImageMagick detect the image type. The value should be a MIME
1253 content-type that is found in the new variable `image-format-suffixes'.
1255 ** Revert and Autorevert
1257 *** If Emacs is compiled with file notification support, it uses notifications
1258 instead of checking file time stamps. To disable this, set the user option
1259 `auto-revert-use-notify' to nil. Alternatively, you can specify a regular
1260 expression matching directories to be excluded from file notifications via
1261 `auto-revert-notify-exclude-dir-regexp'.
1263 *** The default values of `buffer-stale-function', `revert-buffer-function',
1264 and `revert-buffer-insert-file-contents-function' are no longer nil.
1265 Instead they default to functions that do what the nil value used to.
1267 *** `buffer-stale-function' is now used for buffers visiting files too.
1269 *** The new user option `auto-revert-remote-files' enables reversion
1270 of remote files, if non-nil.
1274 *** Functions to pop up menus and dialogs now work on all terminals,
1275 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1276 `message-box', `yes-or-no-p', etc.
1278 The function `display-popup-menus-p' will now return non-nil for a
1279 display or frame whenever a mouse is supported on that display or frame.
1281 *** New hook `tty-setup-hook', run at the end of initializing a text terminal.
1283 *** The hook `term-setup-hook' is obsolete. It is entirely equivalent
1284 to `emacs-startup-hook'. See also the new `tty-setup-hook'.
1286 ** Minor internal changes to the details of lock files.
1287 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1288 If DIR/.#FILE already exists and is not an Emacs lock file,
1289 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1290 numbered lock files DIR/.#FILE.0...).
1291 On file systems that do not support symbolic links, the lock is now a
1292 regular file with contents being what would have been in the symlink.
1294 ** New bool-vector set operation functions:
1295 *** `bool-vector-exclusive-or'
1296 *** `bool-vector-union'
1297 *** `bool-vector-intersection'
1298 *** `bool-vector-set-difference'
1299 *** `bool-vector-not'
1300 *** `bool-vector-subsetp'
1301 *** `bool-vector-count-consecutive'
1302 *** `bool-vector-count-population'
1304 ** New library subr-x.el with miscellaneous small utility functions:
1305 *** `hash-table-keys'
1306 *** `hash-table-values'
1307 *** `string-blank-p'
1308 *** `string-empty-p'
1310 *** `string-reverse'
1311 *** `string-trim-left'
1312 *** `string-trim-right'
1314 *** `string-remove-prefix'
1315 *** `string-remove-suffix'
1317 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1319 ** The spelling of the rx.el category `chinese-two-byte' has been
1320 corrected (the first 'e' was missing).
1322 ** EIEIO namespace cleanup, obsolete-aliasing functions to use `eieio-' prefix:
1323 *** object-name -> eieio-object-name
1324 *** object-class -> eieio-object-class
1325 *** object-class-fast -> eieio--object-class
1326 *** object-class-name -> eieio-object-class-name
1327 *** object-name-string -> eieio-object-name-string
1328 *** object-num-slots -> eieio--object-num-slots
1329 *** object-set-name-string -> eieio-object-set-name-string
1330 *** class-of -> eieio-object-class
1331 *** class-name -> eieio-class-name
1332 *** class-parent -> eieio-class-parent
1333 *** class-parents -> eieio-class-parents
1334 *** class-parents-fast -> eieio-class-parents-fast
1335 *** class-children -> eieio-class-children
1336 *** class-num-slots -> eieio--class-num-slots
1337 *** class-precedence-list -> eieio-class-precedence-list
1338 *** class-direct-subclasses -> eieio-class-children
1339 *** class-direct-superclasses -> eieio-class-parents
1341 ** Obsoleted functions
1344 *** `lisp-complete-symbol'
1345 *** `field-complete'
1346 *** `minibuffer-completion-contents'
1347 *** `isearch-nonincremental-exit-minibuffer'
1348 *** `isearch-filter-visible'
1349 *** `generic-make-keywords-list'
1350 *** `get-upcase-table' (use `case-table-get-table' instead).
1352 ** `with-wrapper-hook' is obsoleted by `add-function'.
1353 The few hooks that used with-wrapper-hook are replaced as follows:
1354 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1355 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1356 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1359 * Changes in Emacs 24.4 on Non-Free Operating Systems
1361 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1362 To use the old font backend, use the following on the command line:
1363 % defaults write org.gnu.Emacs FontBackend ns
1364 GNUstep and Mac OS X 10.4 use the old font backend.
1366 ** Improved fullscreen support on Mac OS X 10.7 and newer, where the
1367 default fullscreen method is now "native" fullscreen. To use the
1368 old style fullscreen, customize `ns-use-native-fullscreen' to nil.
1370 ** On Mac OS X 10.7 and newer, Emacs can use sRGB colorspace, and does so
1371 by default. Customize `ns-use-srgb-colorspace' to go back to the old method.
1372 Note that this does not apply to images.
1374 ** The procedure for building Emacs on MS-Windows has changed.
1375 It is now built by running the same configure script as on all other
1376 platforms. This requires the MSYS environment and MinGW development
1377 tools. See the updated instructions in nt/INSTALL for details.
1379 Using the Posix configure script and Makefiles also means a change in
1380 the directory structure of the Emacs installation on Windows. It is
1381 now the same as on GNU and Unix systems. In particular, the auxiliary
1382 programs, such as cmdproxy.exe and hexl.exe, are in
1383 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1384 version), version-independent site-lisp is in share/emacs/site-lisp,
1385 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1386 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1387 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1388 directories and will find the files in there automatically; there's no
1389 need to set any variables due to this change.)
1391 ** Emacs on Windows 2000 and later can now access files and directories
1392 whose names cannot be encoded in the current system codepage.
1394 The new variable `w32-unicode-filenames' controls this feature: if it
1395 is t, Emacs uses Unicode APIs to pass file names to system calls,
1396 which lifts the limitation of file names to the current locale.
1398 ** Lock files now work on MS-Windows.
1399 This helps to prevent losing your edits if the same file is being
1400 edited in another Emacs session or by another user. See the node
1401 "Interlocking" in the Emacs User Manual for the details. To disable
1402 file locking, customize `create-lockfiles' to nil.
1404 ** The "generate a backtrace on fatal error" feature now works on MS-Windows.
1405 The backtrace is written to the 'emacs_backtrace.txt' file in the
1406 directory where Emacs was running.
1408 ** The `network-interface-list' and `network-interface-info' functions
1409 are now available on MS-Windows.
1411 ** The variable `buffer-file-type' is no longer supported.
1412 Setting it has no effect, and %t in the mode-line format is ignored.
1413 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1414 modifying it has no effect.
1417 * Installation Changes in Emacs 24.3
1419 ** The default X toolkit is now Gtk+ version 3.
1420 If you don't pass `--with-x-toolkit' to configure, or if you use
1421 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1422 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1423 You can explicitly require a specific version by passing
1424 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1426 ** New configure option `--enable-link-time-optimization', to utilize
1427 an appropriate feature provided by GCC since version 4.5.0.
1429 ** New configure option `--without-all' to disable most of the optional
1430 features (image support, etc.) that are normally enabled by default.
1432 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1433 Emacs). If building with GCC, this enables compile-time checks that
1434 warn/give errors about possibly-questionable C code. On a recent GNU
1435 system there should be no warnings; on older and on non-GNU systems
1436 the results may be useful to developers.
1438 ** The configure option `--enable-use-lisp-union-type' has been
1439 renamed to `--enable-check-lisp-object-type', as the resulting
1440 Lisp_Object type no longer uses a union to implement the compile time
1441 check that this option enables.
1443 ** The configure option `--disable-maintainer-mode' has been removed,
1444 as it was confusingly-named and rarely useful.
1446 ** The configure options `--program-prefix', `--program-suffix', and
1447 `--program-transform-name' apply to more than just the installed
1448 binaries. Now they also affect the man pages, icons, and the
1449 etc/emacs.desktop file; but not the info pages, since this would break
1450 links between the various manuals.
1452 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1453 overwriting "emacs" in the installation bin/ directory with a link
1456 ** Emacs uses libtinfo in preference to libncurses, if available.
1458 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1459 /usr/pkg/lib to the linker search path. You must add them yourself if
1462 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1463 (from the bin and libexec directories, respectively). The former is
1464 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1467 * Startup Changes in Emacs 24.3
1469 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1470 lisp/ directory. There should not be any there anyway. If you have
1471 been adding them there, put them somewhere else; e.g., site-lisp.
1473 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1476 * Changes in Emacs 24.3
1480 *** `C-h f' (`describe-function') can now perform autoloading.
1481 When this command is called for an autoloaded function whose docstring
1482 contains a key substitution construct, that function's library is
1483 automatically loaded, so that the documentation can be shown
1484 correctly. To disable this, set `help-enable-auto-load' to nil.
1486 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1487 even after their associated libraries have been loaded (and the
1488 autoloads have been redefined as functions).
1492 *** Images displayed via ImageMagick now support transparency and the
1493 :background image specification property.
1495 *** When available, ImageMagick support is automatically enabled.
1496 It is no longer necessary to call `imagemagick-register-types'
1497 explicitly to install ImageMagick image types; that function is called
1498 automatically at startup, or when customizing an imagemagick- option.
1500 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1501 ImageMagick to view images. (You must call `imagemagick-register-types'
1502 afterwards if you do not use customize to change this.)
1504 *** The new variable `imagemagick-enabled-types' also affects which
1505 ImageMagick types are treated as images. The function
1506 `imagemagick-filter-types' returns the list of types that will be
1511 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1512 next and previous path separator, respectively.
1514 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1515 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1516 non-nil before enabling the mode.
1520 *** New option `mode-line-default-help-echo' specifies the help text
1521 (shown in a tooltip or in the echo area) for any part of the mode line
1522 that does not have its own specialized help text.
1524 *** You can now click mouse-3 in the coding system indicator to invoke
1525 `set-buffer-file-coding-system'.
1527 ** Server and client
1529 *** emacsclient now obeys string values for `initial-buffer-choice',
1530 if it is told to open a new frame without specifying any file to visit
1531 or expression to evaluate.
1533 *** New option `server-auth-key' specifies a shared server key.
1535 ** Emacs now generates backtraces on fatal errors.
1536 On encountering a fatal error, Emacs now outputs a textual description
1537 of the fatal signal, and a short backtrace on platforms like glibc
1538 that support backtraces.
1540 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1541 This minor mode replaces `toggle-read-only', which is now obsolete.
1543 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1544 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1545 respectively, without exiting from the prompt.
1547 ** In the Package Menu, newly-available packages are listed as "new",
1548 and sorted above the other "available" packages by default.
1550 ** If your Emacs was built from a repository checkout, the new variable
1551 `emacs-bzr-version' contains information about the bzr revision used.
1553 ** New option `create-lockfiles' specifies usage of lockfiles.
1554 It defaults to t. Changing it to nil inhibits the creation of lock
1555 files (use this with caution).
1557 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1558 variables on remote hosts.
1560 ** The entry for PCL-CVS has been removed from the Tools menu.
1561 The PCL-CVS commands are still available via the keyboard.
1563 ** Using "unibyte: t" in Lisp source files is obsolete.
1564 Use "coding: raw-text" instead.
1566 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1567 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1568 The previous binding, introduced in Emacs 24.1, was a mistake, because
1569 `C-c LETTER' bindings are reserved for user customizations.
1571 ** Internationalization
1573 *** New language environment: Persian.
1575 *** New input method `vietnamese-vni'.
1577 ** Nextstep (GNUstep / Mac OS X) port
1579 *** Support for fullscreen and the frame parameter fullscreen.
1581 *** A file dialog is used for open/save operations initiated from the
1585 * Editing Changes in Emacs 24.3
1587 ** Search and Replace
1589 *** Non-regexp Isearch now performs "lax" space matching.
1590 Each sequence of spaces in the supplied search string may match any
1591 sequence of one or more whitespace characters, as specified by the
1592 variable `search-whitespace-regexp'. (This variable is also used by a
1593 similar existing feature for regexp Isearch.)
1595 *** New Isearch command `M-s SPC' toggles lax space matching.
1596 This applies to both ordinary and regexp Isearch.
1598 *** New option `replace-lax-whitespace'.
1599 If non-nil, `query-replace' uses flexible whitespace matching too.
1602 *** Global `M-s _' starts a symbol (identifier) incremental search,
1603 and `M-s _' in Isearch toggles symbol search mode.
1604 `M-s c' in Isearch toggles search case-sensitivity.
1606 ** Navigation commands
1608 *** New binding `M-g c' for `goto-char'.
1610 *** New binding `M-g TAB' for `move-to-column'.
1612 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1613 interactively with no prefix arg. Previously, it moved to column 1.
1615 ** New option `yank-handled-properties' allows processing of text
1616 properties on yanked text, in ways that are more general than just
1617 removing them (as is done by `yank-excluded-properties').
1619 ** New option `delete-trailing-lines' specifies whether
1620 M-x delete-trailing-whitespace should delete trailing lines at the end
1621 of the buffer. It defaults to t.
1623 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1625 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1626 `ucs-insert' is now an obsolete alias for `insert-char'.
1628 ** The `z' key no longer has a binding in most special modes.
1629 It used to be bound to `kill-this-buffer', but `z' is too easy to
1632 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1633 It copies the region-rectangle as the last rectangle kill.
1637 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1639 *** New option `register-separator' specifies the register containing
1640 the text to put between collected texts for use with
1641 M-x append-to-register and M-x prepend-to-register.
1644 * Changes in Specialized Modes and Packages in Emacs 24.3
1646 ** Common Lisp emulation (CL)
1648 *** CL's main entry is now (require 'cl-lib).
1649 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1650 i.e., all its definitions have the "cl-" prefix (and internal definitions
1651 use the "cl--" prefix).
1653 If `cl' provided a feature under the name `foo', then `cl-lib'
1654 provides it under the name `cl-foo' instead; with the exceptions of the
1655 few `cl' definitions that had to use `foo*' to avoid conflicts with
1656 pre-existing Elisp entities. These have been renamed to `cl-foo'
1657 rather than `cl-foo*'.
1659 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1660 provide the old, non-prefixed names. Some exceptions are listed below:
1662 *** `cl-flet' is not like `flet' (which is deprecated).
1663 Instead it obeys the behavior of Common-Lisp's `flet'.
1664 In particular, in cl-flet function definitions are lexically scoped,
1665 whereas in flet the scoping is dynamic.
1667 *** `cl-labels' is slightly different from `labels'.
1668 The difference is that it relies on the `lexical-binding' machinery
1669 (as opposed to the `lexical-let' machinery used previously) to capture
1670 definitions in closures, so such closures will only work if `lexical-binding'
1673 *** `cl-letf' is not exactly like `letf'.
1674 The only difference is in details that relate to some deprecated usage
1675 of `symbol-function' in place forms.
1677 *** `progv' was rewritten to use the `let' machinery.
1678 A side effect is that variables without corresponding values are bound
1679 to nil rather than being made unbound.
1681 *** The following methods of extending `setf' are obsolete
1682 (use features from gv.el instead):
1683 `define-modify-macro' (use `gv-letplace')
1684 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1685 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1686 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1690 *** Changes are now highlighted using the same color scheme as in
1691 modern VCSes. Deletions are displayed in red (new faces
1692 `diff-refine-removed' and `smerge-refined-removed', and new definition
1693 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1694 and `smerge-refined-added', and new definition of `diff-added').
1696 *** The variable `diff-use-changed-face' defines whether to use the
1697 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1698 changes in context diffs.
1700 *** The new command `diff-delete-trailing-whitespace' removes trailing
1701 whitespace introduced by a diff.
1703 ** Ediff now uses the same color scheme as Diff mode.
1707 A new version of python.el, which provides several new features, including:
1708 per-buffer shells, better indentation, Python 3 support, and improved
1709 shell-interaction compatible with iPython (and virtually any other
1712 *** Some user options have been replaced/renamed, including (old -> new):
1713 **** python-indent -> python-indent-offset
1714 **** python-guess-indent -> python-indent-guess-indent-offset
1715 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1716 **** python-use-skeletons -> python-skeleton-autoinsert
1718 *** Some user options have been removed, including:
1720 **** `python-indent-string-contents': Strings are never indented.
1722 **** `python-honour-comment-indentation':
1723 Comments are always considered as indentation markers.
1725 **** `python-continuation-offset': Indentation is automatically
1726 calculated in a pep8 compliant way depending on the context.
1728 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1729 Have no direct mapping as the shell interaction is completely different.
1731 **** `python-python-command', `python-jython-command':
1732 Replaced by `python-shell-interpreter'.
1734 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1735 `python-pdbtrack-minor-mode-string', `python-source-modes':
1738 *** Some commands have been replaced (old -> new):
1739 **** python-insert-class -> python-skeleton-class
1740 **** python-insert-def -> python-skeleton-def
1741 **** python-insert-for -> python-skeleton-for
1742 **** python-insert-if -> python-skeleton-if
1743 **** python-insert-try/except -> python-skeleton-try
1744 **** python-insert-try/finally -> python-skeleton-try
1745 **** python-insert-while -> python-skeleton-while
1746 **** python-find-function -> python-nav-jump-to-defun
1747 **** python-next-statement -> python-nav-forward-sentence
1748 **** python-previous-statement -> python-nav-backward-sentence
1749 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1750 **** python-end-of-defun-function -> python-nav-end-of-defun
1751 **** python-send-buffer -> python-shell-send-buffer
1752 **** python-send-defun -> python-shell-send-defun
1753 **** python-send-region -> python-shell-send-region
1754 **** python-send-region-and-go -> emulate with python-shell-send-region
1755 and python-shell-switch-to-shell
1756 **** python-send-string -> python-shell-send-string
1757 **** python-switch-to-python -> python-shell-switch-to-shell
1758 **** python-describe-symbol -> python-eldoc-at-point
1762 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1764 *** The D-Bus object manager interface is implemented.
1766 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1767 if their value does not fit into Emacs's integer range.
1769 *** The function `dbus-call-method' is now non-blocking.
1770 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1772 *** Signals can also be sent as unicast messages.
1774 *** The argument list of `dbus-register-signal' has been extended,
1775 according to the new match rule types of D-Bus.
1777 *** `dbus-init-bus' supports private connections.
1779 *** There is a new function `dbus-setenv'.
1781 ** `desktop-path' no longer includes the "." directory.
1782 Desktop files are now located in ~/.emacs.d by default.
1786 *** `dired-do-async-shell-command' executes each file sequentially
1787 if the command ends in `;' (when operating on multiple files).
1788 Otherwise, it executes the command on each file in parallel.
1790 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1791 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1794 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1795 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1796 mark/unmark/flag all files in the active region.
1798 *** The minibuffer default for `=' (`dired-diff') has changed.
1799 It is now the backup file for the file at point, if one exists.
1800 In Transient Mark mode the default is the file at the active mark.
1802 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1803 The global binding for `M-=', `count-words-region' is in effect.
1807 *** New module "notifications", which can send a notification when you
1808 receive a private message or your nickname is mentioned.
1810 *** ERC will look up server/channel names via auth-source and use any
1813 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1814 only applies to messages sent by lurkers.
1816 ** reStructuredText mode
1818 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1819 fontification, comment handling, and customization have all been revised
1822 *** Support for `imenu' and `which-function-mode'.
1824 *** The reStructuredText syntax is more closely covered.
1825 Sphinx support has been improved.
1827 *** `rst-insert-list' inserts new list or continues existing lists.
1829 *** A negative prefix argument always works for `rst-adjust'.
1831 *** The window configuration is reset after displaying a TOC.
1833 *** The constant `rst-version' describes the rst.el package version.
1837 *** Support for percent literals and recognition of regular expressions
1838 in method calls without parentheses with more methods, including Cucumber
1841 *** Improved syntax highlighting and indentation.
1843 *** New command `ruby-toggle-block', bound to `C-c {'.
1845 *** Some non-standard keybindings/commands have been removed:
1847 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1849 **** `ruby-mark-defun'; use `mark-defun'.
1851 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1852 appropriate settings for the variables `beginning-of-defun-function'
1853 and `end-of-defun-function'.
1855 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1856 `reindent-then-newline-and-indent' and `newline' have been removed.
1858 ** Shell Script mode
1860 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1862 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1864 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1868 *** The free software compiler GHDL is supported (and now the default).
1870 *** Support for the VHDL-AMS packages has been added/updated.
1872 *** Updated to the 2002 revision of the VHDL standard.
1874 *** Accepts \r and \f as whitespace.
1878 *** The faces used by Apropos are now directly customizable.
1879 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1880 see the `apropos' Custom group for details.
1882 *** The old options whose values specified faces to use have been removed
1883 (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
1884 `apropos-match-face' and `apropos-property-face'.).
1888 *** This package has been rewritten to use Tabulated List mode.
1890 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1891 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1895 *** Algebraic simplification mode is now the default.
1896 To restrict to the limited simplifications given by the former
1897 default simplification mode, use `m I'.
1901 *** You can customize the header text that appears above each calendar month.
1902 See the variable `calendar-month-header'.
1904 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1906 *** The calendars produced by cal-html include holidays.
1907 Customize `cal-html-holidays' to change this.
1911 *** The major modes from the parser generators "Bovine" and "Wisent"
1912 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1913 are in `auto-mode-alist', and the corresponding manuals are included.
1917 **** Menu support for the "Configuration" feature. This allows users to
1918 choose the active configuration (such as debug or install) from the menu.
1920 **** New command `ede-set' to interactively set project-local variables.
1922 **** Support for compiling, debugging, and running in "generic" projects.
1924 **** Autoconf editing support for M4 macros with complex arguments.
1926 **** Compilation support for the "linux" project type.
1928 **** "simple" projects have been removed; use "generic" projects instead.
1932 **** Support for parsing #include statements inside a namespace in C/C++.
1934 **** Improved support for 'extern "C"' declarations in C/C++.
1936 **** The ability to ignore more common special C/C++ preprocessor symbols,
1937 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1938 If available, include cdefs.h as an additional source of preprocessor symbols.
1940 **** Improved C/C++ function pointer parsing.
1942 **** In Python, support for converting imports to include file names.
1944 **** Ability to dynamically determine the Python load path.
1946 **** Support for the Python 'WITH' and 'AT' keywords.
1948 **** Improved tooltip completion.
1952 **** The SRecode manual is now included.
1954 **** Tag generation supports constructor/destructor settings and system
1955 include differentiation.
1957 **** Addition of 'Framework' support: Frameworks are specified when a
1958 particular kind of library (such as Android) is needed in a common language
1961 **** Support for nested templates and let variables override based on priority.
1963 **** Support for merging tables from multiple related modes, such as
1964 default -> c++ -> arduino.
1966 ** Compile has a new option `compilation-always-kill'.
1970 *** `custom-reset-button-menu' now defaults to t.
1972 *** Non-option variables are never matched in `customize-apropos' and
1973 `customize-apropos-options' (i.e., the prefix argument does nothing for
1974 these commands now).
1978 *** The variables `term-default-fg-color' and `term-default-bg-color'
1979 are now deprecated in favor of the customizable face `term'.
1981 *** You can customize how to display ANSI terminal colors and styles
1982 by customizing the corresponding `term-color-<COLOR>',
1983 `term-color-underline' and `term-color-bold' faces.
1987 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1989 *** Remote processes are now also supported on remote MS-Windows hosts.
1993 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1994 Previously, this slot stored semicolon-separated attribute-value pairs
1995 appended to some imap URLs, but this is not compatible with RFC 3986.
1996 So now the `filename' slot stores the entire path and query components,
1997 and the `attributes' slot is always nil.
1999 *** New function `url-encode-url' for encoding a URI string.
2000 The `url-retrieve' function now uses this to encode its URL argument,
2001 in case that is not properly encoded.
2003 ** notifications.el supports now version 1.2 of the Notifications API.
2004 The function `notifications-get-capabilities' returns the supported
2007 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2008 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2009 `flymake-warning-bitmap'.
2011 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2012 specifying URL types that should be converted to remote file names at
2013 the FFAP prompt. The default is now '("ftp").
2015 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2016 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2018 ** New option `mouse-avoidance-banish-position' specifies where the
2019 `banish' mouse avoidance setting moves the mouse.
2021 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2022 closing brackets to be aligned with the line of the opening bracket.
2024 ** In Proced mode, new command `proced-renice' renices marked processes.
2026 ** New option `async-shell-command-buffer' specifies the buffer to use
2027 for a new asynchronous `shell-command' when the default output buffer
2028 `*Async Shell Command*' is already in use.
2030 ** SQL mode has a new option `sql-db2-escape-newlines'.
2031 If non-nil, newlines sent to the command interpreter will be escaped
2032 by a backslash. The default does not escape the newlines and assumes
2033 that the sql statement will be terminated by a semicolon.
2035 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2036 (and modes that derive from it), sorts the column at point, or the Nth
2037 column if a numeric prefix argument is given.
2039 ** `which-func-modes' now defaults to t, so Which Function mode, when
2040 enabled, applies to all applicable major modes.
2042 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2045 ** Follow mode no longer works by using advice.
2046 The option `follow-intercept-processes' has been removed.
2048 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2050 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2051 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2052 *** semantic-change-hooks -> semantic-change-functions
2053 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2054 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2055 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2056 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2057 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2058 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2059 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2060 *** rcirc-activity-hooks -> rcirc-activity-functions
2061 *** rcirc-print-hooks -> rcirc-print-functions
2062 *** dbus-event-error-hooks -> dbus-event-error-functions
2063 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2064 *** checkdoc-style-hooks -> checkdoc-style-functions
2065 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2066 *** archive-extract-hooks -> archive-extract-hook
2067 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2068 *** hfy-post-html-hooks -> hfy-post-html-hook
2069 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2070 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2071 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2072 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2074 ** Obsolete packages
2077 In most cases, assoc+member+push+delq work just as well.
2078 And in any case it's just a terrible package: ugly semantics, terrible
2079 inefficiency, and not namespace-clean.
2088 * Incompatible Lisp Changes in Emacs 24.3
2090 ** Docstrings starting with `*' no longer indicate user options.
2091 Only variables defined using `defcustom' are considered user options.
2092 The function `user-variable-p' is now an obsolete alias for
2093 `custom-variable-p'.
2095 ** The return values of `defalias', `defun' and `defmacro' have changed,
2096 and are now undefined. For backwards compatibility, `defun' and
2097 `defmacro' currently return the name of the newly defined
2098 function/macro, but this should not be relied upon.
2100 ** `random' by default now returns a different random sequence in
2101 every Emacs run. Use `(random S)', where S is a string, to set the
2102 random seed to a value based on S, in order to get a repeatable
2103 sequence in later calls.
2105 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2106 that substring is inserted literally even if the LITERAL arg is
2107 non-nil, instead of causing an error to be signaled.
2109 ** `select-window' now always makes the window's buffer current.
2110 It does so even if the window was selected before.
2112 ** The function `x-select-font' can return a font spec, instead of a
2113 font name as a string. Whether it returns a font spec or a font name
2114 depends on the graphical library.
2116 ** `face-spec-set' no longer sets frame-specific attributes when the
2117 third argument is a frame (that usage was obsolete since Emacs 22.2).
2119 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2121 ** The CL package's `get-setf-method' function no longer exists.
2122 Generalized variables are now part of core Emacs Lisp, and implemented
2123 differently to the way cl.el used to do it. It is not possible to
2124 define a compatible replacement for `get-setf-method'. See the file
2125 gv.el for internal details of the new implementation.
2127 ** The arguments of `dbus-register-signal' are no longer just strings,
2128 but keywords or keyword-string pairs. The old argument list will
2129 still be supported for Emacs 24.x.
2131 ** Miscellaneous name changes
2132 Some Lisp symbols have been renamed to correct their spelling,
2133 or to be more consistent with standard Emacs terminology.
2135 *** Renamed functions
2136 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2137 **** inactivate-input-method -> deactivate-input-method
2138 **** quail-inactivate -> quail-deactivate
2139 **** robin-inactivate -> robin-deactivate
2140 **** viper-inactivate-input-method -> viper-deactivate-input-method
2141 **** viper-inactivate-input-method-action ->
2142 viper-deactivate-input-method-action
2143 **** ucs-input-inactivate -> ucs-input-deactivate
2146 The old hooks are still supported for backward compatibility, but they
2147 are deprecated and will be removed eventually.
2148 **** input-method-inactivate-hook -> input-method-deactivate-hook
2149 **** robin-inactivate-hook -> robin-deactivate-hook
2150 **** quail-inactivate-hook -> quail-deactivate-hook
2152 *** Renamed variables
2153 **** follow-deactive-menu -> follow-inactive-menu
2154 **** inactivate-current-input-method-function ->
2155 deactivate-current-input-method-function
2157 ** Some obsolete functions, variables, and faces have been removed:
2158 *** `last-input-char', `last-command-char', `unread-command-char'
2159 *** `facemenu-unlisted-faces'
2160 *** `rmail-decode-mime-charset'
2161 *** `iswitchb-read-buffer'
2162 *** `sc-version', `sc-submit-bug-report'
2163 *** `set-char-table-default'
2164 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2165 *** `compile-internal'
2167 *** `mode-line-inverse-video'
2168 *** `follow-mode-off-hook'
2169 *** `cvs-commit-buffer-require-final-newline'
2170 (use `log-edit-require-final-newline' instead)
2171 *** `cvs-changelog-full-paragraphs'
2172 (use `log-edit-changelog-full-paragraphs' instead)
2173 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2174 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2175 *** `vc-master-templates' (use `vc-handled-backends' instead)
2176 *** `vc-checkout-carefully'
2179 * Lisp Changes in Emacs 24.3
2181 ** CL-style generalized variables are now in core Elisp.
2182 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2183 You can define your own generalized variables using `gv-define-simple-setter',
2184 `gv-define-setter', etc.
2186 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2187 This can significantly speed up execution of non-byte-compiled code,
2188 but can also bump into previously unnoticed cyclic dependencies.
2189 These are generally harmless: they will simply cause the macro calls
2190 to be left for later expansion (as before), but will result in a
2191 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2192 You may wish to restructure your code so this does not happen.
2194 ** New sampling-based Elisp profiler.
2195 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2196 When finished, use M-x profiler-stop. The sampling rate can be based on
2197 CPU time or memory allocations.
2199 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2200 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2202 ** New macros `setq-local' and `defvar-local'.
2204 ** Face underlining can now use a wave.
2206 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2207 of `read-regexp' accepts a string ending with a colon and space, and its
2208 second argument DEFAULTS can be a list of strings accessible via `M-n'
2209 in the minibuffer ahead of other hard-coded useful regexp-related values.
2210 More commands use `read-regexp' now to read their regexp arguments.
2214 *** New function `completion-table-with-quoting' to handle completion
2215 in the presence of quoting, such as file completion in shell buffers.
2217 *** New function `completion-table-subvert' to use an existing completion
2218 table, but with a different prefix.
2222 *** New error type and new function `user-error'.
2223 These do not trigger the debugger.
2225 *** New option `debugger-bury-or-kill', saying what to do with the
2226 debugger buffer when exiting debug.
2228 *** Set `debug-on-message' to enter the debugger when a certain
2229 message is displayed in the echo area. This can be useful when trying
2230 to work out which code is doing something.
2232 *** New var `inhibit-debugger', automatically set to prevent accidental
2233 recursive invocations.
2237 *** New command `fit-frame-to-buffer' adjusts the frame height to
2240 *** The command `fit-window-to-buffer' can adjust the frame height
2241 if the new option `fit-frame-to-buffer' is non-nil.
2243 *** New macro `with-temp-buffer-window', similar to
2244 `with-output-to-temp-buffer'.
2246 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2249 *** New option `switch-to-buffer-preserve-window-point' to restore a
2250 window's point when switching buffers.
2252 *** New display action alist entries `window-height' and `window-width'
2253 specify the size of new windows created by `display-buffer'.
2255 *** New display action alist entry `pop-up-frame-parameters', if
2256 non-nil, specifies frame parameters to give any newly-created frame.
2258 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2259 tells display action functions to avoid changing which frame is
2262 *** New display action alist entry `previous-window', if non-nil,
2263 specifies window to reuse in `display-buffer-in-previous-window'.
2265 *** New display action functions `display-buffer-below-selected',
2266 and `display-buffer-in-previous-window'.
2268 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2269 now accept a third argument to avoid choosing the selected window.
2271 *** Additional values recognized for option `window-combination-limit'.
2273 *** The following variables are obsolete, as they can be replaced by
2274 appropriate entries in the `display-buffer-alist' function introduced
2276 **** `dired-shrink-to-fit'
2277 **** `display-buffer-reuse-frames'
2278 **** `display-buffer-function'
2279 **** `special-display-buffer-names'
2280 **** `special-display-frame-alist'
2281 **** `special-display-function'
2282 **** `special-display-regexps'
2286 *** `current-time-string' no longer requires that its argument's year
2287 must be in the range 1000..9999. It now works with any year supported
2288 by the underlying C implementation.
2290 *** `current-time' now returns extended-format time stamps
2291 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2292 PSEC is typically a multiple of 1000 on current machines. Other
2293 functions that use this format, such as `file-attributes' and
2294 `format-time-string', have been changed accordingly. Old-format time
2295 stamps are still accepted.
2297 *** The format of timers in `timer-list' and `timer-idle-list' is now
2298 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2299 The PSECS slot is new, and uses picosecond resolution. It can be
2300 accessed via the new `timer--psecs' accessor.
2302 *** Last-modified time stamps in undo lists now are of the form
2303 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2307 *** Improved security when handling persistent objects:
2309 **** `eieio-persistent-read' now features optional arguments for specifying
2310 the class to load, as well as a flag stating whether subclasses are allowed;
2311 if provided, other classes will be rejected by the reader. For
2312 compatibility with existing code, if the class is omitted only a
2315 **** New specialized reader for pulling in classes and signaling errors
2316 without evaluation of suspicious code.
2318 **** All slots that contain objects must have a :type. Slots with lists
2319 of objects must use a new type predicate for a list of an object type.
2321 *** Support for `find-function' and similar utilities, through the addition
2322 of filename support to generated symbols.
2324 ** Floating point functions now always return special values like NaN,
2325 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2326 Previously, they returned NaNs on some platforms but signaled errors
2327 on others. The affected functions are acos, asin, tan, exp, expt,
2328 log, log10, sqrt, and mod.
2330 ** New fringe bitmap `exclamation-mark'.
2332 ** Miscellaneous changes to special forms and macros
2334 *** `defun' and `defmacro' are now macros rather than special forms.
2336 *** `kbd' is now a function rather than a macro.
2338 ** Miscellaneous new functions
2340 *** `set-temporary-overlay-map' sets up a temporary keymap that
2341 takes precedence over most other maps for a short while (normally one key).
2343 *** `autoloadp' tests if its argument is an autoloaded object.
2345 *** `autoload-do-load' performs the autoloading operation.
2347 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2349 *** `file-name-base' returns a file name sans directory and extension.
2351 *** `function-get' fetches a function property, following aliases.
2353 *** `posnp' tests if an object is a `posn'.
2355 *** `system-users' returns the user names on the system.
2357 *** `system-groups' returns the group names on the system.
2359 *** `tty-top-frame' returns the topmost frame of a text terminal.
2361 ** The following functions and variables are obsolete:
2362 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2363 *** `buffer-has-markers-at'
2364 *** `macro-declaration-function' (use `macro-declarations-alist')
2365 *** `window-system-version' (provides no useful information)
2366 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2367 *** `query-replace-interactive'
2368 *** `font-list-limit' (has had no effect since Emacs < 23)
2371 * Changes in Emacs 24.3 on Non-Free Operating Systems
2373 ** Cygwin builds can use the native MS Windows user interface.
2374 Pass `--with-w32' to configure. The default remains the X11 interface.
2376 ** Two new functions are available in Cygwin builds:
2377 `cygwin-convert-file-name-from-windows' and
2378 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2379 code to access the Cygwin file-name mapping machinery to convert
2380 between Cygwin and Windows-native file and directory names.
2382 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2383 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2384 `mouse-autoselect-window'.
2386 ** On MS Windows Vista and later Emacs now supports symbolic links.
2388 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2389 support for libxml2, even if its presence is detected.
2391 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2393 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2394 directories to the search path. You must add them yourself if you want them.
2397 * Changes in Emacs 24.2
2399 ** This is mainly a bug-fix release.
2402 * Installation Changes in Emacs 24.1
2404 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2405 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2406 also depend on Gtk+. You can disable them with --without-rsvg and
2409 ** Emacs can be compiled with GnuTLS support.
2410 This happens by default if a suitably recent version of the library is
2411 found at build time. To prevent this, use the configure option
2412 `--without-gnutls'. See below for GnuTLS features.
2414 ** Emacs can be compiled with SELinux support.
2415 This happens by default if a suitably recent version of the library is
2416 found at build time. To prevent this, use the configure option
2417 `--without-selinux'. See below for SELinux features.
2419 ** Emacs can be compiled with ImageMagick support.
2420 This happens by default if a suitably recent version of the library is
2421 found at build time. To prevent this, use the configure option
2422 `--without-imagemagick'. See below for ImageMagick features.
2423 This feature is not available for the Nextstep or MS ports.
2425 ** Emacs can be compiled with libxml2 support.
2426 This happens by default if a suitably recent version of the library is
2427 found at build time. To prevent this, use the configure option
2428 `--without-xml2'. See below for libxml2 features.
2430 ** By default, the installed Info and man pages are compressed.
2431 You can disable this by configuring --without-compress-info.
2433 ** New configure option --with-wide-int.
2434 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2435 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2438 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2439 These provide no new functionality, they just remove the need to edit
2440 lib-src/Makefile by hand in order to use the associated features.
2442 ** New configure option --enable-use-lisp-union-type.
2443 This is only useful for Emacs developers to debug certain types of bugs.
2444 This is not a new feature; only the configure flag is new.
2446 ** The standalone programs digest-doc and sorted-doc are removed.
2447 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2449 ** The standalone program `fakemail' is removed.
2450 If you need it, feedmail.el provides a superset of the functionality.
2453 * Startup Changes in Emacs 24.1
2455 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2456 command line arguments, and the EMACS_UNIBYTE environment variable, no
2457 longer have any effect. (They were declared obsolete in Emacs 23.)
2459 ** New command line option `--no-site-lisp' removes site-lisp directories
2460 from load-path. -Q now implies this. This option does not affect the
2461 EMACSLOADPATH environment variable (and hence has no effect for
2465 * Changes in Emacs 24.1
2469 *** Many packages now use the `completion-at-point' command,
2470 rather than implementing separate completion commands.
2472 *** `completion-at-point' now handles tags and semantic completion.
2474 *** Completion in a non-minibuffer now tries to detect the end of completion
2475 and pops down the *Completions* buffer accordingly.
2477 *** New option `completion-cycle-threshold' allows completion cycling.
2479 *** New option `completion-category-overrides' for overriding the
2480 default completion style in certain circumstances.
2482 *** New completion style `substring'.
2484 *** Completion of buffer names uses `substring' completion by default.
2486 *** The option `widget-complete-field' has been removed.
2490 *** The first time you try sending mail, Emacs asks for a mail method.
2491 This is implemented by a new default for `send-mail-function', which
2492 is `sendmail-query-once'. This offers to use the smtpmail package, or
2493 to use the old defaults relying on external mail facilities
2494 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2495 `mailclient-send-it' on Windows).
2497 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2498 transfers the report to your desktop's preferred mail client, if there
2499 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2502 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2503 and Mail mode changes
2505 ** Emacs server and client changes
2507 *** New option `server-port' specifies the port for TCP Emacs servers.
2509 *** New emacsclient argument -q/--quiet suppresses some status messages.
2511 *** New emacsclient argument --frame-parameters specifies the frame
2512 parameters of any newly-created graphical frame.
2514 *** If emacsclient shuts down due to Emacs signaling an error,
2515 its exit status is 1.
2517 *** New emacsclient argument --parent-id ID.
2518 This opens a client frame in parent X window ID, via XEmbed, similar
2519 to the --parent-id argument to Emacs.
2521 ** Internationalization changes
2523 *** Emacs now supports display and editing of bidirectional text.
2524 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2525 displayed in the correct visual order as expected by users of those
2526 scripts. The display reordering is a "full bidirectionality" class
2527 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2528 with no RTL text should look exactly the same as before.
2530 **** New buffer-local variable `bidi-display-reordering'.
2531 To disable display reordering in a buffer, change this to nil.
2533 **** New buffer-local variable `bidi-paragraph-direction'.
2534 If nil (the default), Emacs determines the base direction of each
2535 paragraph from its text, as specified by the UBA. Setting the value
2536 to `right-to-left' or `left-to-right' forces a base direction on each
2539 Paragraphs with right-to-left base direction are displayed starting at
2540 the right window edge.
2542 *** Enhanced support for characters with no glyphs in available fonts,
2543 or, on text terminals, characters that cannot be encoded by the
2544 terminal coding system. The new option `glyphless-char-display-control'
2545 specifies how to display them: as a hexadecimal code in a box, a thin
2546 1-pixel space, an empty box, etc.
2548 *** New input methods for Farsi and Bulgarian
2549 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2551 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2552 (U+2010 and U+2011).
2554 *** New Hebrew translation of the Emacs Tutorial.
2555 Type `C-u C-h t' to choose it in case your language setup doesn't
2556 automatically select it.
2558 ** An Emacs Lisp package manager is now included.
2559 This is a convenient way to download and install additional packages,
2560 from a package repository at http://elpa.gnu.org.
2562 *** M-x list-packages shows a list of packages, which can be
2563 selected for installation.
2565 *** New command `describe-package', bound to `C-h P'.
2567 *** By default, all installed packages are loaded automatically when
2568 Emacs starts up. To disable this, set `package-enable-at-startup' to
2569 nil. To specify the packages to load, customize `package-load-list'.
2571 ** Custom theme changes
2573 *** New command `M-x customize-themes', which provides a convenient
2574 interface for enabling and disabling Custom themes.
2576 *** New option `custom-theme-load-path' is the load path for themes.
2577 Emacs no longer looks for Custom themes in `load-path'. The default
2578 value of `custom-theme-load-path' says to look for themes in
2579 `custom-theme-directory', followed by a subdirectory of
2580 `data-directory' named "themes/", which contains a small selection of
2581 built-in Custom themes.
2583 *** New option `custom-safe-themes' records known-safe theme files.
2584 If a theme is not in this list, Emacs queries before loading it, and
2585 offers to save the theme to `custom-safe-themes' automatically. By
2586 default, all themes included in Emacs are treated as safe.
2588 ** Improved GTK integration
2590 *** GTK scroll-bars are now placed on the right by default.
2591 The function `set-scroll-bar-mode' can change this.
2593 *** GTK tool bars can have just text, just images or images and text.
2594 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2595 the default is taken from desktop settings.
2597 *** GTK tool bars can be placed on any edge of the frame.
2598 The frame-parameter tool-bar-position controls this. It takes the
2599 values top, left, right or bottom. The Options => Show/Hide menu has
2602 *** The default colors for selected text (the `region' face) are taken
2603 from the GTK theme when Emacs is built with GTK.
2605 *** Emacs uses GTK tooltips by default if built with GTK.
2606 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2608 ** Graphical interface changes
2610 *** On graphical displays, the mode-line no longer ends in dashes.
2611 Also, the first dash (which does not indicate anything) is just
2612 displayed as a space.
2614 *** `menu-bar-select-buffer-function' lets you choose another operation
2615 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2617 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2618 built with Xft. These fonts can be set via X resources, for example:
2619 Emacs.pane.menubar.font: Courier-12
2623 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2624 or if it receives a SIGINT signal in batch mode.
2626 *** `kill-emacs-hook' is now also run in batch mode.
2627 Third-party code which adds to `kill-emacs-hook' should check if they
2628 do the right thing in batch mode.
2630 ** Scrolling changes
2632 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2633 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2634 of buffer at first key-press (instead they move to top/bottom of buffer)
2635 when `scroll-error-top-bottom' is non-nil.
2637 *** New option `scroll-error-top-bottom' (see above).
2639 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2640 scroll a line instead of full screen.
2642 *** New property `scroll-command' should be set on a command's symbol to
2643 define it as a scroll command affected by `scroll-preserve-screen-position'.
2645 *** If you customize `scroll-conservatively' to a value greater than 100,
2646 Emacs will never recenter point in the window when it scrolls due to
2647 cursor motion commands or commands that move point (e.f., `M-g M-g').
2648 Previously, you needed to use `most-positive-fixnum' as the value of
2649 `scroll-conservatively' to achieve the same effect.
2651 *** "Aggressive" scrolling now honors the scroll margins.
2652 If you customize `scroll-up-aggressively' or
2653 `scroll-down-aggressively' and move point off the window, Emacs now
2654 scrolls the window so as to avoid positioning point inside the scroll
2657 ** Basic SELinux support has been added.
2658 This requires Emacs to be linked with libselinux at build time.
2660 *** Emacs preserves the SELinux file context when backing up.
2661 Also, the function `copy-file' has an extra optional argument for
2662 preserving SELinux context, and the return value of `backup-buffer'
2663 now includes the SELinux context.
2665 *** New functions `file-selinux-context' and `set-file-selinux-context'
2666 get and set the SELinux context of a file.
2670 *** `delete-by-moving-to-trash' now only affects commands that specify
2671 trashing. This avoids inadvertently trashing temporary files.
2673 *** Calling `delete-file' or `delete-directory' with a prefix argument
2674 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2676 ** File- and directory-local variable changes
2678 *** You can stop directory local vars from applying to subdirectories.
2679 Add an element (subdirs . nil) to the alist portion of any variables
2680 settings to indicate that the section should not apply to
2683 *** Directory local variables can apply to some file-less buffers.
2684 Affected modes include dired, vc-dir, and log-edit. For example,
2685 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2686 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2687 `hack-dir-local-variables-non-file-buffer' to support this.
2689 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2690 Instead, use "eval: (minor-mode 1)".
2692 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2693 to `inhibit-local-variables-regexps'. As the name suggests, it now
2694 applies to ALL file local variables, not just -*- lines. The
2695 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2700 *** The `quit-window' command now restores the last buffer displayed
2701 in the quitted window.
2703 *** Resizing an Emacs frame now preserves proportional window sizes,
2704 modulo restrictions like window minimum sizes and fixed-size windows.
2706 *** The behavior of `display-buffer' is now customizable in detail.
2708 **** New option `display-buffer-base-action' specifies a list of
2709 user-determined display "actions" (functions and optional arguments
2710 for choosing the displaying window).
2712 This takes precedence over the default display action, which is
2713 specified by `display-buffer-fallback-action'.
2715 **** New option `display-buffer-alist' maps buffer name regexps to
2716 display actions, taking precedence over `display-buffer-base-action'.
2718 *** New option `window-combination-limit'.
2719 The new option `window-combination-limit' allows to return the space
2720 obtained for resizing or creating a window more reliably to the window
2721 from which such space was obtained.
2723 *** New option `window-combination-resize'.
2724 The new option `window-combination-resize' allows to split a window that
2725 otherwise cannot be split because it's too small by stealing space from
2726 other windows in the same combination. Subsequent resizing or deletion
2727 of the window will resize all windows in the same combination as well.
2729 *** New option `frame-auto-hide-function' lets you choose between
2730 iconifying or deleting a frame when burying a buffer in a dedicated
2731 frame, or quitting a window showing a buffer in a frame of its own.
2733 *** New commands `maximize-window' and `minimize-window'.
2734 These maximize and minimize the size of a window within its frame.
2736 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2737 These functions allow to navigate through the live buffers that have
2738 been shown in a specific window.
2740 ** Minibuffer changes
2742 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2743 This is handy for minibuffer-only frames, and is also used for the feature
2744 where mouse-1 pops up *Messages*"', which can now easily be changed.
2746 *** Minibuffers set `truncate-lines' to nil.
2747 If you want to change the value to something else, you could use
2748 for example `minibuffer-setup-hook'.
2750 ** `auto-mode-case-fold' is now enabled by default.
2752 ** `backup-by-copying-when-mismatch' now defaults to t.
2754 ** New basic faces `error', `warning', `success'.
2755 These are used to highlight text indicating failure, caution or
2756 successful operation.
2758 ** New option `list-colors-sort' defines the color sort order
2759 for `list-colors-display'.
2761 ** The variable `focus-follows-mouse' now always defaults to nil.
2764 * Editing Changes in Emacs 24.1
2768 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2769 `isearch-yank-line'.
2771 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2772 `isearch-yank-kill'.
2774 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2776 ** New commands `count-words-region' and `count-words'.
2778 *** M-= is bound to `count-words-region', not `count-lines-region'.
2779 The `count-words-region' command, when called interactively, reports
2780 the number of lines, words, and characters in the region. It is a
2781 superset of the old `count-lines-region', which is now an obsolete
2784 ** The command `just-one-space' (M-SPC), if given a negative argument,
2785 also deletes newlines around point.
2789 *** New option `delete-active-region'.
2790 If non-nil, [delete] and DEL delete the region if it is active and no
2791 prefix argument is given. If set to `kill', those commands kill
2794 *** New command `delete-forward-char', bound to [delete].
2795 This is meant for interactive use, and obeys `delete-active-region'.
2796 The command `delete-char' does not obey `delete-active-region'.
2798 *** `delete-backward-char' is now a Lisp function.
2799 Apart from obeying `delete-active-region', its behavior is unchanged.
2800 However, the byte compiler now warns if it is called from Lisp; Lisp
2801 callers should use delete-char with a negative argument instead.
2803 *** The option `mouse-region-delete-keys' has been deleted.
2805 ** Selection changes.
2807 The default handling of clipboard and primary selections has been
2808 changed to conform with modern X applications. In short, most
2809 commands for killing and yanking text now use the clipboard, while
2810 mouse commands use the primary selection.
2812 In the following, we provide a list of these changes, followed by a
2813 list of steps to get the old behavior back if you prefer that.
2815 *** `select-active-regions' now defaults to t.
2816 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2817 the kill ring. The selected text is put in the primary selection, if
2818 the system possesses a separate primary selection facility (e.g. X).
2820 **** `select-active-regions' also accepts a new value, `only'.
2821 This means to only set the primary selection for temporarily active
2822 regions (usually made by mouse-dragging or shift-selection);
2823 "ordinary" active regions, such as those made with C-SPC followed by
2824 point motion, do not alter the primary selection.
2826 **** `mouse-drag-copy-region' now defaults to nil.
2828 *** mouse-2 is now bound to `mouse-yank-primary'.
2829 This pastes from the primary selection, ignoring the kill-ring.
2830 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2832 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2834 *** `x-select-enable-primary' now defaults to nil.
2835 Thus, commands that kill text or copy it to the kill-ring (such as
2836 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2838 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2839 exactly equivalent to M-w, C-w, and C-y respectively.
2841 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2842 non-nil by default, as Windows does not support the primary selection
2843 between applications.
2845 *** To return to the previous behavior, do the following:
2847 **** Change `select-active-regions' to nil.
2848 **** Change `mouse-drag-copy-region' to t.
2849 **** Change `x-select-enable-primary' to t (on X only).
2850 **** Change `x-select-enable-clipboard' to nil.
2851 **** Bind `mouse-yank-at-click' to mouse-2.
2853 *** Support for X cut buffers has been removed.
2855 *** X clipboard managers are now supported.
2856 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2858 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2859 in the current rectangle. With a prefix argument, this prompts for a
2860 number to count from and for a format string.
2862 ** `redisplay-dont-pause' now defaults to t.
2863 This makes Emacs feel more responsive to editing commands that arrive
2864 at high rate, e.g. if you lean on some key, because stopping redisplay
2865 in the middle (when this variable is nil) forces more expensive
2866 updates later on, and Emacs appears to be unable to keep up.
2868 ** The behavior of <TAB> for active regions in Text mode has changed.
2869 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2870 when the region is active causes Emacs to indent all the lines in the
2871 region, aligning them with the line previous to the first line in the
2872 region (or with the left margin if there is no previous line).
2874 ** When `occur' is called with a prefix argument, matching strings are
2875 collected into the `*Occur*' buffer without line numbers. If there
2876 are parenthesized subexpressions in the specified regexp, `occur'
2877 reads replacement text that may contain \\& and \\N whose convention
2878 follows `replace-match'.
2881 * Changes in Specialized Modes and Packages in Emacs 24.1
2883 ** Archive Mode has basic support for browsing and updating 7z archives.
2887 *** BibTeX mode now supports biblatex.
2888 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2889 `bibtex-entry-field-alist' is now an obsolete alias for
2890 `bibtex-BibTeX-entry-alist'.
2892 *** New command `bibtex-search-entries', bound to C-c C-a.
2894 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2896 *** New variable `bibtex-search-entry-globally'.
2900 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2902 *** The default browser used by the package is now the "xdg-open" program,
2903 on platforms that support it. This calls your desktop's preferred browser.
2907 *** Support for musical notes.
2909 *** Support for logarithmic units.
2911 *** No longer uses the tex prefix for TeX specific unit names when
2912 using TeX or LaTeX mode.
2914 *** New option to highlight selections using faces.
2916 *** `calc-histogram' has the option of using a vector to determine the bins.
2918 *** New "O" option prefix.
2920 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2922 ** Calendar, Diary, and Appt
2924 *** Diary entries can contain non-printing "comments".
2925 See the variable `diary-comment-start'.
2927 *** Appointments can specify their individual warning times.
2928 See the variable `appt-warning-time-regexp'.
2930 *** The function specified by `appt-disp-window-function' may be passed
2931 lists of arguments if multiple appointments are due at similar times.
2932 If you are using a custom function for this, you should update it.
2934 *** New function `diary-hebrew-birthday'.
2936 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2937 may no longer be nil, but must all be strings.
2939 *** The obsolete (since Emacs 22.1) method of enabling the appt
2940 package by adding `appt-make-list' to `diary-hook' has been removed.
2941 Use `appt-activate' instead.
2943 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2944 appt-issue-message (use the function appt-activate)
2945 appt-visible/appt-msg-window (use the variable appt-display-format)
2947 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2948 view-diary-entries, list-diary-entries, show-all-diary-entries
2952 *** New feature to "guess" the style in an existing buffer.
2953 The main entry point is M-x c-guess.
2955 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2957 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2958 Thus C-M-a will, by default, go to the beginning of the immediate function,
2961 *** "Macros with semicolons" can be registered for correct indentation.
2962 Where such a macro ends a line (no semicolon) the next statement is no longer
2963 parsed as a statement continuation.
2965 ** Comint and modes derived from it use the standard completion code.
2969 *** Compilation mode can be used without Font Lock mode.
2970 `compilation-parse-errors-function' is now obsolete.
2972 *** New variable `compilation-filter-start', which is bound while
2973 `compilation-filter-hook' runs. It records the start position of the
2974 text inserted by `compilation-filter'.
2976 *** `compilation-error-screen-columns' and `compilation-first-column'
2977 are obeyed in the editing buffer. So programming language modes can
2978 set them, whereas previously only the value in the *Compilation*
2983 *** Customize buffers now contain a search field.
2984 The search is performed using `customize-apropos'.
2985 To turn off the search field, set `custom-search-field' to nil.
2987 *** Options in customize group buffers start out hidden if not customized.
2988 Use the arrow to the left of the option name to toggle visibility.
2990 *** custom-buffer-sort-alphabetically now defaults to t.
2992 *** The color widget now has a "Choose" button, which allows you to
2993 choose a color via `list-colors-display'.
2997 *** It is now possible to access buses other than the default system
3000 *** The `dbus-register-method' and `dbus-register-property' functions
3001 optionally do not register names.
3003 *** The new function `dbus-register-service' registers a known service
3004 name on a D-Bus without also registering a property or a method.
3008 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3009 if called with a prefix argument, read a file name from the minibuffer
3010 instead of using the current buffer.
3012 *** The "dired local variables" feature of Dired-x is obsolete.
3013 The standard directory local variables feature replaces it.
3017 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3018 controlling attempts to autojoin a channel.
3020 *** New variable `erc-coding-system-precedence': If we use `undecided'
3021 as the server coding system, this variable will then be consulted.
3022 The default is to decode strings that can be decoded as utf-8 as
3023 utf-8, and do the normal `undecided' decoding for the rest.
3027 *** The default value of `eshell-directory-name' has changed
3028 to be an "eshell" directory in `user-emacs-directory'.
3029 The old "~/.eshell/" directory is still used if it exists, though.
3033 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3034 It now supports multithread non-stop debugging and simultaneous
3035 debugging of several threads.
3039 *** RET (`image-toggle-animation') toggles animation, if applicable.
3040 Animation plays once, unless the option `image-animate-loop' is non-nil.
3044 *** New command M-x info-display-manual displays a named Info manual.
3045 If that manual is already visited in some Info buffer, it displays
3046 that buffer. (This is handy if you have many manuals in many *info*
3047 buffers, and don't remember the name of the buffer visiting the manual
3048 you want to consult.) Otherwise, it loads and displays the manual.
3050 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3051 This is for compatibility with the stand-alone Info reader program,
3052 and also because `Info-edit' is a rarely used command that is disabled
3055 ** Mail mode changes (not Message mode)
3057 *** New command M-x mail-add-attachment for adding MIME attachments
3059 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3060 (Its name is misleading, since it has nothing to do with MIME
3061 attachments.) The old name is now an obsolete alias to the new name.
3063 ** MH-E has been updated to MH-E version 8.3.1.
3064 See MH-E-NEWS for details.
3066 ** Modula-2 mode provides auto-indentation.
3068 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3070 ** nXML mode no longer binds C-RET to `nxml-complete'.
3071 Completion is now performed via `completion-at-point', bound to C-M-i
3072 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3073 default), this performs tag completion.
3075 ** Org mode has been updated to version 7.8.09.
3076 See ORG-NEWS for details.
3078 ** Prolog mode has been completely revamped, with lots of additional
3079 functionality such as more intelligent indentation, electricity,
3080 support for more variants, including Mercury, and a lot more.
3084 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3085 in the Rmail incoming message.
3087 *** The variable `rmail-message-filter' no longer has any effect.
3088 This change was made in Emacs 23.1 but was not advertised at the time.
3089 Try using `rmail-show-message-hook' instead.
3093 *** M-x shell prompts for the shell path name if the default directory
3094 is a remote file name and neither the environment variable $ESHELL nor
3095 the variable `explicit-shell-file-name' is set.
3097 *** TAB is now bound to the standard `completion-at-point' command,
3098 which now implements the pcomplete rules for shell command completion.
3102 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3103 if the mail server supports them. This uses either built-in GnuTLS
3104 support, or the starttls.el library. Customize `smtpmail-stream-type'
3107 *** The variable `smtpmail-auth-credentials' has been removed.
3108 By default, the information is now stored in the file ~/.authinfo.
3109 This was the default value of smtpmail-auth-credentials. If you had
3110 customized smtpmail-auth-credentials to a list of user names and
3111 passwords, those settings are not used. During your first connection
3112 to the smtp server, Emacs will prompt for the user name and password,
3113 and offer to save them to ~/.authinfo. Or you can manually copy the
3114 credentials to ~/.authinfo. For example, if you had
3116 (setq smtpmail-auth-credentials
3117 '(("mail.example.org" 25 "jim" "s!cret")))
3119 then the equivalent line in ~/.authinfo would be
3121 machine mail.example.org port 25 login jim password s!cret
3123 See the auth-source manual for more information, e.g. on encrypting
3124 the credentials file.
3126 *** The variable `smtpmail-starttls-credentials' has been removed.
3127 If you had that set, you need to put
3129 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3131 in your ~/.authinfo file instead.
3133 *** SMTPmail defaults to using the address in the From: header as the
3134 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3135 to the address you wish to use instead.
3139 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3140 and `sql-oracle-scan-on'.
3142 *** New options controlling prompting for login parameters.
3143 Each supported product has a custom variable `sql-*-login-params',
3144 which is a list of the parameters to be prompted for before a
3145 connection is established.
3147 *** The command `sql-product-interactive' now takes a prefix argument,
3148 which causes it to prompt for an SQL product.
3150 *** Product-specific SQL interactive commands now take prefix arguments.
3151 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3152 given a prefix argument, prompt for a name for the SQL interactive
3153 buffer. This reduces the need for calling `sql-rename-buffer'.
3155 *** SQL interactive modes suppress command continuation prompts, and
3156 replace tabs with spaces. The first change impacts multiple line SQL
3157 statements entered with C-j between each line, statements yanked into
3158 the buffer and statements sent with `sql-send-*' functions. The
3159 second prevents the MySQL and Postgres interpreters from listing
3160 object name completions when sent text via `sql-send-*' functions.
3162 *** New command `sql-connect' starts a predefined SQLi session,
3163 using the login parameters from `sql-connection-alist'.
3165 *** New "Save Connection" menu item in SQLi buffers.
3166 This gathers the login params specified for the SQLi session, if it
3167 was not started by a connection, and saves them as a new connection.
3169 *** New commands for listing database objects and details:
3170 sql-list-all and sql-list-table.
3172 *** An API for manipulating SQL product definitions has been added.
3176 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3180 *** New inline access method "ksu" (kerberized su).
3182 *** The following access methods are discontinued: "ssh1_old",
3183 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3185 *** The user option `remote-file-name-inhibit-cache' controls whether
3186 remote file attributes are cached for better performance.
3188 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3189 default value to "".
3191 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3192 for remote machines which support SELinux.
3194 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3195 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3196 the degree of parallelism.
3198 ** VC and related modes
3200 *** Support for pulling on distributed version control systems.
3201 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3202 supported (currently with Bzr, Git, and Mercurial), to update the
3203 current branch and working tree. A prefix argument means to prompt
3204 the user for specifics, e.g. a pull location.
3206 *** `vc-update' is now an alias for `vc-pull'.
3208 *** Support for merging on distributed version control systems.
3209 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3210 is supported (currently with Bzr, Git, and Mercurial), to merge
3211 changes from another branch into the current one. It prompts for
3212 specifics, e.g. a merge source.
3214 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3215 shows a diff while querying the user. It defaults to t.
3217 *** Log entries in some Log View buffers can be toggled to display a
3218 longer description by typing RET (log-view-toggle-entry-display).
3219 This is currently supported for Bzr, Git, and Mercurial (to support
3220 another backend, define a `log-view-expanded-log-entry-function').
3221 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3222 use this to display the full log entry for the revision at point.
3224 *** New command `vc-ediff' allows visual comparison of two revisions
3225 of a file similar to `vc-diff', but using ediff backend.
3227 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3228 this was not advertised at the time.
3230 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3231 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3232 this was not advertised at the time.
3238 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3240 *** partial-completion-mode (complete.el) is obsolete.
3241 You can get a comparable behavior with:
3242 (setq completion-styles '(partial-completion initials))
3243 (setq completion-pcm-complete-word-inserts-delimiters t)
3245 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3247 *** pgg is obsolete (use EasyPG instead).
3249 *** sregex.el is obsolete, since rx.el is a strict superset.
3251 *** s-region.el and pc-select.el are obsolete.
3252 They are superseded by shift-select-mode, enabled by default since 23.1.
3254 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3258 *** The Landmark game is now invoked with `landmark', not `lm'.
3259 Its functions and variables have been similarly renamed.
3261 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3262 (This interfered with cua-mode.)
3264 *** f90.el has some support for Fortran 2008 syntax.
3266 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3268 *** New command `nato-region' converts text to NATO phonetic alphabet.
3271 * New Modes and Packages in Emacs 24.1
3273 ** Occur Edit mode applies edits made in *Occur* buffers to the
3274 original buffers. It is bound to "e" in Occur mode.
3276 ** New global minor mode electric-pair-mode.
3277 When enabled, typing an open parenthesis automatically inserts the
3278 matching closing one.
3280 ** New global minor mode electric-indent-mode.
3281 When enabled, typing certain characters triggers reindentation.
3282 Major modes wishing to use this can set electric-indent-chars or
3283 electric-indent-functions.
3285 ** New global minor mode electric-layout-mode.
3286 When enabled, typing certain characters automatically inserts newlines.
3287 Major modes wishing to use this can set electric-layout-rules.
3289 ** tabulated-list.el provides a generic major mode for tabulated data,
3290 from which other modes can be derived.
3292 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3294 ** secrets.el is an implementation of the Secret Service API, an
3295 interface to password managers like GNOME Keyring or KDE Wallet. The
3296 Secret Service API requires D-Bus for communication. The command
3297 `secrets-show-secrets' offers a buffer with a visualization of the
3300 ** notifications.el provides an implementation of the Desktop
3301 Notifications API. It requires D-Bus for communication.
3303 ** soap-client.el supports access to SOAP web services from Emacs.
3304 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3306 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3308 ** New emacs-lock.el package.
3309 The previous version has been moved to obsolete/old-emacs-lock.el.
3310 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3311 against exiting Emacs and killing the buffer can be set separately.
3312 The mechanism for automatically turning off protection for buffers
3313 with dead inferior processes has been generalized.
3316 * Incompatible Lisp Changes in Emacs 24.1
3318 ** Passing a nil argument to a minor mode function call now ENABLES
3319 the minor mode unconditionally. This is so that you can write e.g.
3321 (add-hook 'text-mode-hook 'foo-mode)
3323 to enable foo-mode in Text mode buffers, removing the need for
3324 `turn-on-foo-mode' style functions. This affects all mode commands
3325 defined by `define-minor-mode'. If called interactively, the mode
3326 command still toggles the minor mode.
3328 ** The return value of `backup-buffer' has changed.
3329 It is now a list of three elements, where the second element is a list
3330 describing the original file's SELinux context. If Emacs or the
3331 system lacks SELinux support, the context list is (nil nil nil nil).
3332 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3334 ** `char-direction-table' and the `char-direction' function were deleted.
3335 They were buggy and inferior to the new support of bidirectional
3336 editing introduced in Emacs 24. If you need the bidirectional
3337 properties of a character, use `get-char-code-property' with the last
3338 argument `bidi-class'.
3340 ** `copy-directory' now copies the source directory as a subdirectory
3341 of the target directory, if the latter is an existing directory. The
3342 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3343 the contents directly into a pre-existing target directory.
3345 ** For mouse click input events in the text area, the Y pixel
3346 coordinate in the POSITION list now counts from the top of the text
3347 area, excluding any header line. Previously, it counted from the top
3350 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3351 been further reduced. Now a backquote not followed by a space is
3352 always treated as a "new-style" backquote. Please remove all
3353 "old-style" backquotes from your code. If your code uses backquotes
3354 as documented in the Elisp manual, and compiles without warning, then
3355 you have nothing to do in this regard. Code not following the
3356 appropriate conventions may fail to compile.
3358 The most common cause of trouble seems to be an old-style backquote
3359 followed by a newline. Another cause of trouble is vector notation
3360 for key sequence notation: instead of [(control ,)] and [(control ')],
3361 you should write [(control ?,)] and [(control ?')], which will work in
3364 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3365 was not advertised at the time. The function `custom-initialize-delay'
3366 replaced all known uses.
3368 ** `view-buffer' now treats special mode-class in the same way that
3369 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3370 major mode is special).
3372 ** Menu and tool bar changes
3374 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3375 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3376 With these alist entries omitted, `make-frame' checks the value of the
3377 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3378 a menu-bar or tool-bar, respectively. If the alist entries are added,
3379 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3381 *** The menu bar bindings's caches are not used any more.
3382 Use (where-is-internal <def> nil t) instead.
3384 ** Regions created by mouse dragging are now normal active regions,
3385 similar to those created by shift-selection (see Selection changes
3386 above). In previous Emacs versions, these regions were delineated by
3387 `mouse-drag-overlay'; that variable has been removed.
3389 ** The fourth argument of `filter-buffer-substring' has been removed.
3390 If you want to remove text properties from the final result, simply
3391 pass the result through substring-no-properties.
3393 ** cl.el no longer provides `cl-19'.
3395 ** The following obsolete functions and aliases have been removed
3396 (the appropriate new function is given in parentheses; "not needed"
3397 means you can just remove all calls to the function in question):
3399 *** `comint-kill-output' (`comint-delete-output')
3400 *** `decompose-composite-char' (`char-to-string')
3401 *** `outline-visible' (`outline-invisible-p')
3402 *** `internal-find-face' (`facep')
3403 *** `internal-get-face' (`facep and check-face')
3404 *** `frame-update-faces' (not needed)
3405 *** `frame-update-face-colors' (`frame-set-background-mode')
3406 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3407 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3408 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3409 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3410 *** `x-make-font-unbold' (`make-face-unbold')
3411 *** `x-make-font-unitalic' (`make-face-unitalic')
3412 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3413 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3414 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3415 *** `char-bytes' (== 1)
3416 *** `isearch-return-char' (`isearch-printing-char')
3417 *** `make-local-hook' (not needed)
3418 *** `set-screen-height' (`set-frame-height')
3419 *** `set-screen-width' (`set-frame-width')
3421 ** The following obsolete variables and varaliases have been removed
3422 (the appropriate new variable is given in parentheses):
3424 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3425 *** `vc-header-alist' (`vc-BACKEND-header')
3426 *** `directory-sep-char' (== ?/)
3427 *** `font-lock-defaults-alist' (`font-lock-defaults')
3428 *** `e' (`float-e').
3430 ** The following obsolete files were removed:
3431 sc.el, x-menu.el, rnews.el, rnewspost.el
3433 ** The format of the finder-inf.el file has changed, since the Finder
3434 mechanism is now based on the package system. The variable
3435 `finder-package-info' is replaced by `package--builtins' and
3436 `finder-keywords-hash'.
3438 ** When generating autoloads, `update-directory-autoloads' no longer
3439 assumes every inspected file is in your `load-path'. It instead
3440 generates relative names according to the current `load-path'.
3443 * Lisp Changes in Emacs 24.1
3445 ** Code can now use lexical scoping by default instead of dynamic scoping.
3446 The `lexical-binding' variable enables lexical scoping for local
3447 variables. It is typically set via a file-local variable in the first
3448 line of the file, in which case it applies to all the code in that
3451 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3452 binding instead of the old dynamic binding mode.
3454 *** Lexically scoped interpreted functions are represented with a new form
3455 of function value which looks like (closure ENV ARGS &rest BODY).
3457 *** New macro `letrec' to define recursive local functions.
3459 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3460 So do `defcustom' and other forms that call `defvar' as a subroutine.
3462 *** New function `special-variable-p' to check whether a variable is
3463 declared as dynamically bound.
3465 *** The form ((lambda ...) ...) is deprecated.
3467 ** An Emacs Lisp testing tool is now included.
3468 Emacs Lisp developers can use this tool to write automated tests for
3469 their code. See the ERT info manual for details.
3471 ** Changes for bidirectional display and editing
3473 *** New function `current-bidi-paragraph-direction'.
3474 This returns the base direction of the paragraph at point.
3476 *** New function `bidi-string-mark-left-to-right'.
3477 Given a string containing characters from right-to-left scripts, this
3478 function returns another string which can be safely inserted into a
3479 buffer, such that any following text will be always displayed to the
3480 right of that string. (This works by appending an invisible Unicode
3481 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3483 This is useful when the buffer has overall left-to-right paragraph
3484 direction and you need to insert a string whose contents are not known
3485 in advance, without disrupting the layout of the line.
3489 *** Window tree functions are accessible in Elisp.
3490 Functions are provided to return the parent, siblings or child windows
3491 of any window including internal windows (windows not associated with a
3492 buffer) in the window tree.
3494 **** New function `window-valid-p' gives non-nil for live and internal
3497 **** Window manipulation can deal with internal windows.
3498 Many window handling functions like `split-window', `delete-window', or
3499 `delete-other-windows' as well as the window resizing functions can now
3500 act on any window including internal ones.
3502 *** window-total-height/-width vs window-body-height/-width.
3503 The function `window-height' has been renamed to `window-total-height'
3504 and `window-width' has been renamed to `window-body-width'. The old
3505 names are provided as aliases. Two new functions `window-total-width'
3506 and `window-body-height' are provided.
3508 *** Window parameters specific to window handling functions.
3509 For each window you can specify a parameter to override the default
3510 behavior of a number of functions like `split-window', `delete-window'
3511 and `delete-other-windows'. The variable `ignore-window-parameters'
3512 allows to ignore processing such parameters.
3514 *** New semantics of third argument of `split-window'.
3515 The third argument of `split-window' has been renamed to SIDE and can be
3516 set to any of the values 'below, 'right, 'above, or 'left to make the
3517 new window appear on the corresponding side of the window that shall be
3518 split. Any other value of SIDE will cause `split-window' to split the
3519 window into two side-by-side windows as before.
3521 *** Window resizing functions.
3522 A new standard function for resizing windows called `window-resize' has
3523 been introduced. This and all other functions for resizing windows no
3524 longer delete any windows when they become too small.
3526 *** Deleting the selected window now selects the most recently selected
3527 live window on that frame instead.
3529 *** `adjust-window-trailing-edge' adjustments.
3530 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3531 is able to resize other windows if a window adjacent to the trailing
3532 edge cannot be shrunk any more. This makes its behavior more similar to
3533 that of Emacs 21 without compromising, however, its inability to delete
3534 windows which was introduced in Emacs 22.
3536 *** Window-local buffer lists.
3537 Windows now have local buffer lists. This means that removing a buffer
3538 from display in a window will preferably show the buffer previously
3539 shown in that window with its previous window-start and window-point
3540 positions. This also means that the same buffer may be automatically
3541 shown twice even if it already appears in another window.
3543 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3544 which if non-nil requires the buffer to be displayed in the currently
3545 selected window, signaling an error otherwise. If nil, another window
3546 can be used, e.g. if the selected one is strongly dedicated.
3548 *** `split-window-vertically' and `split-window-horizontally' renamed
3549 to `split-window-below' and `split-window-right' respectively.
3550 The old names are kept as aliases.
3554 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3555 named ACTION, and takes a display action of the same form as
3556 `display-buffer-base-action' (see Changes, above). A non-nil,
3557 non-list value is treated specially, as the old meaning.
3559 **** New variable `display-buffer-overriding-action'.
3561 **** The procedure of `display-buffer' etc. to choose a window is
3562 determined by combining `display-buffer-overriding-action',
3563 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3564 and `display-buffer-fallback-action'. The second and fourth of these
3565 are user-customizable variables.
3567 See the docstring of `display-buffer' for details.
3569 *** New functions `window-state-get' and `window-state-put'.
3570 These functions allow to save and restore the state of an arbitrary
3571 frame or window as an Elisp object.
3575 *** New variable `completion-extra-properties' used to specify extra
3576 properties of the current completion:
3577 - :annotation-function, same as the old completion-annotate-function.
3578 - :exit-function, function to call after completion took place.
3580 *** Functions on `completion-at-point-functions' can return any of the
3581 properties valid for `completion-extra-properties'.
3583 *** `completion-annotate-function' is obsolete.
3585 *** New `metadata' method for completion tables. The metadata thus returned
3586 can specify various details of the data returned by `all-completions':
3587 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3588 used to select a style in completion-category-overrides.
3589 - `annotation-function' to add annotations in *Completions*.
3590 - `display-sort-function' to specify how to sort entries in *Completions*.
3591 - `cycle-sort-function' to specify how to sort entries when cycling.
3593 *** `minibuffer-local-filename-must-match-map' is not used any more.
3594 Instead, the bindings in `minibuffer-local-filename-completion-map'
3595 are combined with `minibuffer-local-must-match-map'.
3597 *** New variable `completing-read-function' allows overriding the
3598 behavior of `completing-read'.
3600 ** `glyphless-char-display' can now distinguish between graphical and
3601 text terminal display, via a char-table entry that is a cons cell.
3603 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3604 Instead, the offending function is removed.
3608 *** New function `run-hook-wrapped' for running an abnormal hook by
3609 passing the hook functions as arguments to a "wrapping" function.
3610 Like `run-hook-with-args-until-success', it stops at the first
3611 non-nil return value.
3613 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3614 set of "wrapping" filters, similar to around advice.
3615 (A version of this macro was actually added in Emacs 23.2 but was not
3616 advertised at the time.)
3620 *** New macro `condition-case-unless-debug' (this was actually added in
3621 Emacs 23.1 as condition-case-no-debug, but not advertised)
3623 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3625 *** Variable `stack-trace-on-error' removed.
3627 *** The debugger can now "continue" from an error, which means it will
3628 jump to the error handler as if the debugger had not been invoked
3629 instead of jumping all the way to the top-level.
3631 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3632 This can be useful when `inhibit-quit' is set.
3634 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3635 named Emacs server instances.
3637 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3638 to redirect STDOUT to a file.
3640 ** The function `format-time-string' now supports the %N directive,
3641 for higher-resolution time stamps.
3643 ** New input reading functions
3645 *** New function `read-char-choice' reads a restricted set of
3646 characters, discarding any inputs not inside the set.
3648 *** The command `read-color' now requires a match for a color name
3649 or RGB triplet, instead of signaling an error if the user provides
3652 **** `facemenu-read-color' is now an alias for `read-color'.
3654 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3655 The variable is now used to load all kind of supported dynamic libraries,
3656 not just image libraries. The previous name is still available as an
3659 ** Syntax parsing changes
3661 *** New variable `syntax-propertize-function'.
3662 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3663 This allows syntax-table properties to be set independently from font-lock:
3664 just call syntax-propertize to make sure the text is propertized.
3665 Together with this new variable come a new hook
3666 syntax-propertize-extend-region-functions, as well as two helper functions:
3667 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3668 as-is; and syntax-propertize-rules which provides a new way to specify
3671 *** Syntax tables support a new "comment style c" additionally to style b.
3673 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3675 ** frame-local variables cannot be let-bound any more.
3677 ** Major and minor mode changes
3679 *** `set-auto-mode' now respects mode: local variables at the end of files,
3680 as well as those in the -*- line.
3682 *** `prog-mode' is a new major mode from which programming modes
3685 **** `prog-mode-hook' can be used to enable features for programming
3686 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3687 on-the-fly spell checking for comments and strings.
3689 *** New hook `change-major-mode-after-body-hook', run by
3690 `run-mode-hooks' just before any other mode hooks.
3692 *** Enabled globalized minor modes can be disabled in specific major modes.
3693 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3694 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3696 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3698 ** File-handling changes
3700 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3701 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3702 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3703 argument is supplied (see Trash changes, above).
3705 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3707 ** Tool-bars can display separators.
3708 Tool-bar separators are handled like menu separators in menu-bar maps,
3709 i.e. via menu entries of the form `(menu-item "--")'.
3713 *** Animated images support (currently animated gifs only).
3715 **** `image-animated-p' returns non-nil if an image can be animated.
3717 **** `image-animate' animates a supplied image spec.
3719 **** `image-animate-timer' returns the timer object for an image that
3722 *** `image-extension-data' has been renamed to `image-metadata'.
3723 The old name is an obsolete alias to the new one.
3725 *** Image mode can view any image type that ImageMagick supports.
3726 This requires Emacs to be built with ImageMagick support.
3728 **** New function `imagemagick-types', defined if ImageMagick support
3729 is enabled, returns a list of image file extensions that your
3730 ImageMagick installation supports.
3732 **** New function `imagemagick-register-types' enables ImageMagick
3733 image types in Image mode and in `create-image' and other helper
3736 **** New option `imagemagick-types-inhibit' excludes certain
3737 ImageMagick image types from `imagemagick-register-types'.
3739 **** With ImageMagick support, there are extra Image mode commands to
3740 resize and rotate images: `image-transform-fit-to-height',
3741 `image-transform-fit-to-width', `image-transform-set-rotation', and
3742 `image-transform-set-scale'.
3744 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3745 passes it to the mail user agent function. This argument specifies an
3746 action for returning to the caller after finishing with the mail. For
3747 example, this is used by Rmail to optionally delete a mail window.
3749 ** XML and HTML parsing
3750 If Emacs is compiled with libxml2 support, there are two new
3751 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3752 and `libxml-parse-xml-region' (which parses XML). Both return an
3753 Emacs Lisp parse tree.
3755 ** Networking and encryption changes
3757 *** `open-network-stream' can now be used to open an encrypted stream.
3758 It now accepts an optional `:type' parameter for initiating a TLS
3759 connection, directly or via STARTTLS. To do STARTTLS, additional
3760 parameters (`:end-of-command', `:success', `:capabilities-command')
3761 must also be supplied.
3763 *** New library gnutls.el.
3764 The new function `gnutls-available-p' returns non-nil if Emacs is
3765 built with GnuTLS support. The main entry points are
3766 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3767 these functions through `open-network-stream', because that can
3768 upgrade connections through STARTTLS opportunistically or use plain
3769 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3772 *** New primitive `secure-hash' that supports many secure hash algorithms:
3773 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3774 sha1.el has been removed. The `sha1' feature is provided by default.
3778 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3780 ** Progress reporters can now "spin".
3781 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3782 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3783 time you call `progress-reporter-update' on that progress reporter,
3784 with a nil or omitted VALUE argument, the reporter message is
3785 displayed with a "spinning bar".
3787 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3788 being reverted, even if the buffer has a local `revert-buffer-function'.
3790 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3791 If delayed-warnings-list is non-nil, the command loop calls
3792 `delayed-warnings-hook' after `post-command-hook'. At present, this
3793 is only used by Emacs on some platforms to display warnings during
3794 startup, which might otherwise not be noticed. This uses the
3795 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3797 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3799 ** New function `make-composed-keymap' that constructs a new keymap
3800 from multiple input maps. You can use this to make a keymap that
3801 inherits from multiple maps, eg:
3802 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3804 ** New function `string-prefix-p'.
3805 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3807 ** New reader macro ## that stands for the empty symbol.
3808 This means that the empty symbol can now be read back. Also, #: by itself
3809 (when not immediately followed by a possible symbol character) stands for
3810 an empty uninterned symbol.
3812 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3814 ** The following functions and variables are obsolete:
3816 *** `tooltip-use-echo-area' is obsolete.
3817 Rather than setting this to t, disable Tooltip mode instead.
3819 *** buffer-substring-filters is obsolete.
3820 Use `filter-buffer-substring-functions' instead.
3822 *** `byte-compile-disable-print-circle' is obsolete.
3824 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3825 Use `post-command-hook' instead.
3827 *** `font-lock-maximum-size' is obsolete.
3830 * Changes in Emacs 24.1 on Non-Free Operating Systems
3832 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3833 and also when HOME is set to C:\ by default.
3835 ** New configure.bat options
3837 *** --enable-checking builds Emacs with extra runtime checks.
3839 *** --distfiles specifies files to be included in binary distribution.
3841 *** --without-gnutls disables automatic GnuTLS detection.
3843 *** --lib for general library linkage, works with the USER_LIBS build variable.
3845 ** New make target `dist' to create binary distribution for MS Windows.
3847 ** The Lisp function `w32-default-color-map' is now obsolete.
3848 (It is only used internally in the Emacs C code.)
3850 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3851 reappear on mouse-over. (Requires OS X 10.6 or later.)
3853 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3854 other platforms, rather than inserting its contents into the buffer.
3857 ----------------------------------------------------------------------
3858 This file is part of GNU Emacs.
3860 GNU Emacs is free software: you can redistribute it and/or modify
3861 it under the terms of the GNU General Public License as published by
3862 the Free Software Foundation, either version 3 of the License, or
3863 (at your option) any later version.
3865 GNU Emacs is distributed in the hope that it will be useful,
3866 but WITHOUT ANY WARRANTY; without even the implied warranty of
3867 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3868 GNU General Public License for more details.
3870 You should have received a copy of the GNU General Public License
3871 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3877 paragraph-separate: "[
\f]*$"