NEWS 139 KB
Newer Older
1
GNU Emacs NEWS -- history of user-visible changes.
2

3
Copyright (C) 2010-2013 Free Software Foundation, Inc.
4
See the end of the file for license conditions.
Dave Love's avatar
#  
Dave Love committed
5

6
Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 8
If possible, use M-x report-emacs-bug.

9
This file is about changes in Emacs version 24.
10

11 12
See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
and NEWS.1-17 for changes in older Emacs versions.
13 14 15

You can narrow news to a specific version by calling `view-emacs-news'
with a prefix argument or by typing C-u C-h C-n.
16

Glenn Morris's avatar
Glenn Morris committed
17
Temporary note:
18 19 20 21
+++ indicates that all necessary updates to the manuals in doc/ are complete.
--- means no change in the manuals is needed.
When you add a new item, use the appropriate mark if you know it applies,
otherwise leave it unmarked.
Glenn Morris's avatar
Glenn Morris committed
22

23 24

* Installation Changes in Emacs 24.4
25

Chong Yidong's avatar
Chong Yidong committed
26
** Emacs can now be compiled with ACL support.
27 28
This happens by default if a suitable support library is found at
build time, like libacl on GNU/Linux.  To prevent this, use the
29
configure option `--disable-acl'.
30

Chong Yidong's avatar
Chong Yidong committed
31
** Emacs can now be compiled with file notification support.
32 33 34 35
This happens by default if a suitable system library is found at
build time.  To prevent this, use the configure option
`--with-file-notification-no'.  See below for file-notify features.
FIXME?  This feature is not available for the Nextstep port. (?)
36

Chong Yidong's avatar
Chong Yidong committed
37 38
** The configure option `--without-compress-info' has been generalized,
and renamed to `--without-compress-install'.  It now prevents compression
39 40
of _any_ files during installation.

Chong Yidong's avatar
Chong Yidong committed
41
** The configure option `--with-crt-dir' has been removed.
42 43 44
It is no longer needed, as the crt*.o files are no longer linked
specially.

45 46 47
** Directories passed to configure option `--enable-locallisppath' are
no longer created during installation.

Chong Yidong's avatar
Chong Yidong committed
48 49 50 51
** Emacs can be compiled with zlib support.
If this library is present (which it normally is on most systems), the
function `zlib-decompress-region' becomes available, which can
decompress gzip- and zlib-format compressed data.
52

53 54 55 56
---
** Emacs for NS (OSX, GNUStep) can be built with ImageMagick support.
pkg-config is required to find ImageMagick libraries.

57 58 59 60 61
** For OSX >= 10.5, the Core text based font backend from the Mac port is used.
For GNUStep and OSX 10.4 the old backend is used.
To use the old backend by default, do on the command line:
% defaults write org.gnu.Emacs FontBackend ns

Glenn Morris's avatar
Glenn Morris committed
62

63
* Startup Changes in Emacs 24.4
Glenn Morris's avatar
Glenn Morris committed
64

65 66 67 68 69 70 71 72 73 74
+++
** When initializing `load-path', an empty element in the EMACSLOADPATH
environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
"/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
load-path (the one that would have been used if EMACSLOADPATH was unset).
This makes it easier to _extend_ the load-path via EMACSLOADPATH
(previously, EMACSLOADPATH had to specify the complete load-path,
including the defaults).  (In older versions of Emacs, an empty element
was replaced by ".", so use an explicit "." now if that is what you want.)

75 76
+++
** The -L option, which normally prepends its argument to load-path,
77 78
will instead append, if the argument begins with `:' (or `;' on MS Windows;
i.e., `path-separator').
79

80 81 82 83 84 85
+++
** If you use either site-load.el or site-init.el to customize the dumped
Emacs executable, any changes to `load-path' that these files make
will no longer be present after dumping.  To affect a permanent change
to `load-path', use the `--enable-locallisppath' option of `configure'.

Chong Yidong's avatar
Chong Yidong committed
86 87 88 89
+++
** The user option `initial-buffer-choice' can now specify a function
to set up the initial buffer.

Glenn Morris's avatar
Glenn Morris committed
90

91
* Changes in Emacs 24.4
92

Eli Zaretskii's avatar
Eli Zaretskii committed
93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108
+++
** Emacs now supports menus on text-mode terminals.
If the terminal supports a mouse, clicking on the menu bar, or on
sensitive portions of the mode line or header line, will drop down the
menu defined at that position.  Likewise, clicking C-mouse-2 or
C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
for those locations.

If the text terminal does not support a mouse, you can activate the
first menu-bar menu by typing F10, which invokes `menu-bar-open'.

If you want the previous behavior, whereby F10 invoked `tmm-menubar',
customize the option `tty-menu-open-use-tmm' to a non-nil value.
(Typing M-` will always invoke `tmm-menubar', even if
`tty-menu-open-use-tmm' is nil.)

109
+++
Chong Yidong's avatar
Chong Yidong committed
110 111 112 113
** The *Messages* buffer is created in `messages-buffer-mode',
a new major mode, with read-only status.  Any code that might create
the *Messages* buffer should call the function `messages-buffer' to do
so and set up the mode.
114

Chong Yidong's avatar
Chong Yidong committed
115
** Emacs now supports ACLs (access control lists).
116 117 118 119
+++
*** Emacs preserves the ACL entries of files when backing up.
+++
*** New functions `file-acl' and `set-file-acl' get and set the ACL
120 121 122
entries of a file.  On GNU/Linux, the POSIX ACL interface is used via
libacl.  On MS-Windows, the NT Security APIs are used to emulate the
POSIX ACL interfaces.
123

124 125 126 127 128 129
** Multi-monitor support has been added.

*** New functions `display-monitor-attributes-list' and
`frame-monitor-attributes' can be used to obtain information about
each physical monitor on multi-monitor setups.

130 131 132 133 134 135 136 137
*** The functions `display-pixel-width' and `display-pixel-height' now
behave consistently among the platforms: they return the pixel width
or height for all physical monitors associated with the given display
as just they were on X11.  To get information for each physical
monitor, use the new functions above.  Similar notes also apply to
`x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
`display-mm-height', `x-display-mm-width', and `x-display-mm-height'.

Chong Yidong's avatar
Chong Yidong committed
138 139 140
+++
** The cursor stops blinking after 10 blinks (by default) on X and NS.
You can change the default by customizing `blink-cursor-blinks'.
141

Chong Yidong's avatar
Chong Yidong committed
142 143 144 145 146
+++
** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
This affects View mode, etc.

** Help changes
Glenn Morris's avatar
Glenn Morris committed
147

Tassilo Horn's avatar
Tassilo Horn committed
148
+++
Chong Yidong's avatar
Chong Yidong committed
149 150 151 152 153
*** The command `apropos-variable' is renamed to `apropos-user-option'.
`apropos-user-option' shows all user options while `apropos-variable'
shows all variables.  When called with a universal prefix argument,
the two commands swap their behaviors.  When `apropos-do-all' is
non-nil, they output the same results.
154

Chong Yidong's avatar
Chong Yidong committed
155 156
+++
*** The key `?' now describes prefix bindings, like `C-h'.
157

Chong Yidong's avatar
Chong Yidong committed
158
*** The command `quail-help' is deleted.  Use `C-h C-\'
159 160
(`describe-input-method') instead.

Chong Yidong's avatar
Chong Yidong committed
161
** Frame and window changes
162

Chong Yidong's avatar
Chong Yidong committed
163 164 165
+++
*** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
bound to <f11> and M-<f10>, respectively.
166

Chong Yidong's avatar
Chong Yidong committed
167 168 169 170
*** New command `frameset-to-register' is now bound to `C-x r f', replacing
`frame-configuration-to-register'.  It offers similar functionality,
plus enhancements like the ability to restore deleted frames.  The
command `frame-configuration-to-register' still exists, but is unbound.
171

172
+++
Chong Yidong's avatar
Chong Yidong committed
173 174 175 176 177 178 179 180
*** New hooks `focus-in-hook', `focus-out-hook'.
These are normal hooks run when an Emacs frame gains or loses input focus.

---
*** `split-window' is now a non-interactive function, not a command.
As a command, it was a special case of `C-x 2' (`split-window-below'),
and as such superfluous.  After being reimplemented in Lisp, its
interactive form was mistakenly retained.
181

182
+++
Chong Yidong's avatar
Chong Yidong committed
183 184 185 186 187 188
*** New option `scroll-bar-adjust-thumb-portion'.
Available only on X, this option allows to control over-scrolling
using the scroll bar (i.e. dragging the thumb down even when the end
of the buffer is visible).

** Lisp evaluation changes
189
+++
Chong Yidong's avatar
Chong Yidong committed
190 191 192 193 194 195 196 197 198 199 200
*** `eval-defun' on an already defined defcustom calls the :set function,
if there is one.

*** A zero prefix arg of `eval-last-sexp' (`C-x C-e'),
`eval-expression' (`M-:') and `eval-print-last-sexp' (`C-j') inserts
a list with no limit on its length and level (by using nil values of
`print-length' and `print-level'), and inserts additional formats for
integers (octal, hexadecimal, and character).

---
** `write-region-inhibit-fsync' now defaults to t in batch mode.
201

202
+++
Chong Yidong's avatar
Chong Yidong committed
203 204
** `cache-long-line-scans' has been renamed to `cache-long-scans'
because it affects caching of paragraph scanning results as well.
205

Chong Yidong's avatar
Chong Yidong committed
206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224
---
** The option `set-mark-default-inactive' has been deleted.
This unfinished feature was introduced by accident in Emacs 23.1;
simply disabling Transient Mark mode does the same thing.

** The default value of `comment-use-global-state' is changed to t,
and this variable has been marked obsolete.


* Editing Changes in Emacs 24.4

** Indentation changes

+++
*** The behavior of `C-x TAB' (`indent-rigidly') has changed.
When invoked without a prefix argument, it now activates a transient
mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
the text indentation in the region.  Typing any other key resumes
normal editing behavior.
225

Chong Yidong's avatar
Chong Yidong committed
226 227
+++
*** `electric-indent-mode' is enabled by default.
228

Chong Yidong's avatar
Chong Yidong committed
229
*** `tab-stop-list' is now implicitly extended to infinity by repeating
Xue Fuqiao's avatar
Xue Fuqiao committed
230 231
the last step.  Its default value is changed to nil which means a tab
stop every `tab-width' columns.
232

Chong Yidong's avatar
Chong Yidong committed
233
** Filling changes
234

Chong Yidong's avatar
Chong Yidong committed
235 236 237 238 239 240 241 242 243 244
*** New command `cycle-spacing' cycles between spacing conventions:
having just one space, no spaces, or reverting to the original
spacing.  Like `just-one-space', it can handle or ignore newlines and
leave different number of spaces.

*** `fill-single-char-nobreak-p' prevents fill from breaking a line after
a 1-letter word, which is an error according to Polish and
Czech typography rules.  To globally enable this feature, evaluate:

  (add-hook 'fill-nobreak-predicate 'fill-single-char-nobreak-p)
245

246
+++
Chong Yidong's avatar
Chong Yidong committed
247 248 249 250
** Uniquify is enabled by default with `post-forward-angle-brackets' style.

** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
Most commands are still unaware of it, but kill/yank do work on the rectangle.
251

252 253 254 255 256 257 258
+++
** New option `visual-order-cursor-movement'.
If this is non-nil, cursor motion with arrow keys will follow the
visual order of characters on the screen: <left> always moves to the
left, <right> always moves to the right, disregarding the surrounding
bidirectional context.

Chong Yidong's avatar
Chong Yidong committed
259
** Register changes
260

Chong Yidong's avatar
Chong Yidong committed
261
*** All register commands can now show help with preview.
262

Chong Yidong's avatar
Chong Yidong committed
263
*** New command `kmacro-to-register' stores keyboard macros in registers.
264

Chong Yidong's avatar
Chong Yidong committed
265 266 267 268 269 270 271 272 273
*** New command `C-x r f' (`frameset-to-register').
See Changes in Emacs 24.4, above.

** New command `delete-duplicate-lines'.
When its arg ADJACENT is non-nil (when called interactively with C-u
C-u) it works like the utility `uniq'.  Otherwise by default it
deletes duplicate lines everywhere in the region without regard to
adjacency.  When its arg KEEP-BLANKS is non-nil (when called
interactively with C-u C-u C-u), duplicate blank lines are preserved.
274

275

276
* Changes in Specialized Modes and Packages in Emacs 24.4
277

Johan Bockgård's avatar
Johan Bockgård committed
278
** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
Stefan Monnier's avatar
Stefan Monnier committed
279 280 281 282 283 284 285 286 287 288 289 290 291 292 293
Affected files:
~/.emacs.d/timelog	replaces  ~/.timelog
~/.emacs.d/vip		replaces  ~/.vip
~/.emacs.d/viper	replaces  ~/.viper
~/.emacs.d/ido.last	replaces  ~/.ido.last
~/.emacs.d/kkcrc	replaces  ~/.kkcrc
~/.emacs.d/quickurls	replaces  ~/.quickurls
~/.emacs.d/idlwave	replaces  ~/.idlwave
~/.emacs.d/bdfcache.el	replaces  ~/.bdfcache.el
~/.emacs.d/places	replaces  ~/.emacs-places
~/.emacs.d/shadows	replaces  ~/.shadows
~/.emacs.d/shadow_todo	replaces  ~/.shadow_todo
~/.emacs.d/strokes	replaces  ~/.strokes
~/.emacs.d/notes	replaces  ~/.notes
~/.emacs.d/type-break	replaces  ~/.type-break
294 295 296 297 298
Also the following files used by the now obsolete otodo-mode.el:
~/.emacs.d/todo-do	replaces  ~/.todo-do
~/.emacs.d/todo-done	replaces  ~/.todo-done
~/.emacs.d/todo-top	replaces  ~/.todo-top

Chong Yidong's avatar
Chong Yidong committed
299
** Backtrace and debugger
300

Chong Yidong's avatar
Chong Yidong committed
301 302 303
*** The Lisp debugger's `e' command now includes the lexical environment
when evaluating the code in the context at point.  Hence, it now lets
you access lexical variables.
304

Chong Yidong's avatar
Chong Yidong committed
305
*** New command `v' (`debuger-toggle-locals) displays local vars.
306

Chong Yidong's avatar
Chong Yidong committed
307 308
*** New minor mode `jit-lock-debug-mode' lets you use the debuggers on
code run via JIT Lock.
309

310 311 312 313
** Battery

*** Battery information via the BSD `apm' utility is now supported.

314 315 316 317
** Buffer Menu

*** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.

318 319
** Calendar and Diary

Chong Yidong's avatar
Chong Yidong committed
320 321
*** New faces `calendar-weekday-header', `calendar-weekend-header',
and `calendar-month-header'.
322 323 324

*** New option `calendar-day-header-array'.

325
+++
Glenn Morris's avatar
Glenn Morris committed
326
*** New variable `diary-from-outlook-function', used by the command
327 328
`diary-from-outlook'.

Chong Yidong's avatar
Chong Yidong committed
329
*** The variable `calendar-font-lock-keywords' is obsolete.
330

331 332 333 334 335 336 337 338 339 340 341 342 343 344
** Calc

*** Calc by default now uses the Gregorian calendar for all dates, and
uses January 1, 1 AD as its day number 1.  Previously Calc used the
Julian calendar for dates before September 14, 1752, and it used
December 31, 1 BC as its day number 1; the new scheme is more
consistent with Calendar's calendrical system and day numbering.

*** The new variable `calc-gregorian-switch' lets you configure the
date when Calc switches from the Julian to the Gregorian calendar.
Nil, the default value, means to always use the Gregorian calendar.
The value (YEAR MONTH DAY) means to start using the Gregorian calendar
on the given date.

345 346
*** Support for ISO 8601 dates.

Chong Yidong's avatar
Chong Yidong committed
347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392
** CEDET

*** EDE

**** The cpp-root project now supports executing a compile command.
It can be set through the new :compile-command slot or the
buffer-local variable `compile-command'.

**** Better selection of include directories for the 'linux' project.
Include directories now support out-of-tree build directories and
target architecture auto-detection.

*** Semantic

**** Improved detection of used namespaces in current scope in C++.

**** Parsing of default values for variables and function arguments in C/C++.
They are also displayed by the summarize feature in the modeline.

**** Improved parsing of function pointers in C/C++.
This also includes parsing of function pointers as function arguments.

**** Parsing of C/C++ preprocessor macros which open new scope.
For example, this enables parsing of macros which open new namespaces.

**** Support for 'this' pointer in inline member functions in C++.

** cl-lib

*** New macro cl-tagbody.

+++
*** letf is now just an alias for cl-letf.

** CUA mode

*** CUA mode was changed to make use of delete-selection-mode and
shift-select-mode.  So you can now enable it independently from
transient-mark-mode, delete-selection-mode, and shift-select-mode.
As a result, cua-highlight-region-shift-only is obsolete
(you can disable transient-mark-mode to get the same result).

*** CUA's rectangles can now be used via `cua-rectangle-mark-mode'.

** Delete Selection mode can now be used without `transient-mark-mode'.

393 394
** Desktop

395 396
*** `desktop-auto-save-timeout' defines the number of seconds idle time
before auto-save of the desktop.
397

398
*** `desktop-restore-frames', enabled by default, allows saving and
399
restoring the frame/window configuration (frameset).  Additional options
400
`desktop-restore-in-current-display', `desktop-restore-reuses-frames'
401
and `desktop-restore-forces-onscreen' offer further customization.
402

403 404 405 406
** Dired

*** New minor mode `dired-hide-details-mode' hides details.

Chong Yidong's avatar
Chong Yidong committed
407
** Eldoc Mode works properly in the minibuffer.
408

409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424
** EPA

*** New option `epa-mail-aliases'.

You can set this to a list of alias expansions for keys to use
in `epa-mail-encrypt'.

If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
that means: when one of the recipients of the message being encrypted
is `foo@bar.com', encrypt the message for `foo@hello.org' instead.

If one element of the variable's value is ("foo@bar.com"),
that means: when one of the recipients of the message being encrypted
is `foo@bar.com', ignore that name as regards encryption.
This is useful to avoid a query when you have no key for that name.

Chong Yidong's avatar
Chong Yidong committed
425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551
** ERC

*** New option `erc-accidental-paste-threshold-seconds'.
If set to a number, this can be used to avoid accidentally paste large
amounts of data into the ERC input.

+++
** ERT

*** New macro `skip-unless' allows skipping ERT tests.
See the ERT manual for details.

** Eshell

+++
*** `eshell' now supports visual subcommands and options
Eshell has been able to handle "visual" commands (interactive,
non-line oriented commands such as top that require display
capabilities not provided by eshell) by running them in an Emacs
terminal emulator.  See `eshell-visual-commands'.

This feature has been extended to subcommands and options that make a
usually line-oriented command a visual command.  Typical examples are
"git log" and "git <command> --help" which display their output in a
pager by default.  See `eshell-visual-subcommands' and
`eshell-visual-options'.

---
*** Added Eshell-Tramp module
External su and sudo commands are now the default; the internal,
Tramp-using variants can still be used by enabling the eshell-tramp
module.

** F90 mode
---
*** New option `f90-smart-end-names'.

** Icomplete is a bit more like Ido.
*** key bindings to navigate through and select the completions.
*** The icomplete-separator is customizable, and its default has changed.
*** Removed icomplete-show-key-bindings.
*** Icomplete-mode by defaults applies to all forms of minibuffer completion.
(setq icomplete-with-completion-tables '(internal-complete-buffer))
will revert to the old behavior.

** Ido
*** Ido has a manual now.
*** `ido-use-virtual-buffers' takes a new value 'auto.
*** `ido-decorations' has been slightly extended to give a bit more control.

** Image mode

*** New commands `n' (`image-next-file') and `p' (`image-previous-file')
visit the next image file and the previous image file in the same
directory, respectively.

*** New commands to show specific frames of multi-frame images.
`f' (`image-next-frame') and `b' (`image-previous-frame') visit the
next or previous frame.  `F' (`image-goto-frame') shows a specific frame.

*** New commands to speed up, slow down, or reverse animation.
---
*** The command `image-mode-fit-frame' deletes other windows.
When toggling, it restores the frame's previous window configuration.
It also has an optional frame argument, which can be used by Lisp
callers to fit the image to a frame other than the selected frame.

** Hi-Lock

*** New option `hi-lock-auto-select-face'.  When non-nil, hi-lock commands
will cycle through faces in `hi-lock-face-defaults' without prompting.

+++
*** New global command `M-s h .' (`highlight-symbol-at-point')
highlights the symbol found near point without prompting,
using the next face automatically.

** Imenu

*** New option `imenu-generic-skip-comments-and-strings'.

** Info

*** New face `info-index-match' is used to highlight matches in index
entries displayed by `Info-index-next', `Info-virtual-index' and
`info-apropos'.

** JS Mode

*** Better indentation of multiple-variable declarations.
If declaration spans several lines, variables on the following lines
are lined up to the first one.

*** We now recognize and better indent continuations in array
comprehensions.

*** New option `js-switch-indent-offset`.

** MH-E has been updated to MH-E version 8.5.
See MH-E-NEWS for details.

+++
** Octave mode
*** Font locking for texinfo comments and new keywords
*** Completion in Octave file buffers
*** Eldoc support
*** Jump to definition
*** Documentation lookup/search
*** Code cleanup and various bug fixes

** OPascal mode is the new name for Delphi mode.

*** All delphi-* variables and functions have been renamed to opascal-*.
*** `delphi-newline-always-indents' is not supported any more.
Use `electric-indent-mode' instead.
*** `delphi-tab' is gone, replaced by `indent-for-tab-command'.

** Package

*** The format of `archive-contents' files, generated by package
repositories, has changed to allow a new (fifth) element in the data
vectors, containing an associative list with extra properties.

*** `describe-package' buffer uses the `:url' extra property to
display a `Homepage' header, if it's present.

** Prolog mode
552

Chong Yidong's avatar
Chong Yidong committed
553 554
*** `prolog-use-smie' has been removed, along with the non-SMIE
indentation code.
Xue Fuqiao's avatar
Xue Fuqiao committed
555

Chong Yidong's avatar
Chong Yidong committed
556
** Remember
557

Chong Yidong's avatar
Chong Yidong committed
558 559
*** The new command `remember-notes' creates a buffer which is saved
on `kill-emacs'.
Xue Fuqiao's avatar
Xue Fuqiao committed
560

Chong Yidong's avatar
Chong Yidong committed
561 562 563 564 565 566
You may think of it as a *scratch* buffer whose content is preserved.
In fact, it was designed as a replacement for *scratch* buffer and can
be used that way by setting `initial-buffer-choice' to
`remember-notes' and `remember-notes-buffer-name' to "*scratch*".
Without the second change, *scratch* buffer will still be there for
notes that do not need to be preserved.
567

Chong Yidong's avatar
Chong Yidong committed
568 569 570
*** The Remember package can now store notes in separates files.
You can use the new function `remember-store-in-files' within the
`remember-handler-functions' option.
571

Chong Yidong's avatar
Chong Yidong committed
572 573
See `remember-data-directory' and `remember-directory-file-name-format'
for new options related to this function.
574

Chong Yidong's avatar
Chong Yidong committed
575 576 577 578
** Rmail

*** Customize `rmail-mbox-format' to influence some minor aspects of
how Rmail displays non-MIME messages.
579

580
---
Chong Yidong's avatar
Chong Yidong committed
581 582
*** The `unrmail' command now converts from BABYL to mboxrd format,
rather than mboxo.  Customize `unrmail-mbox-format' to change this.
583

Chong Yidong's avatar
Chong Yidong committed
584
** Ruby mode
585

Chong Yidong's avatar
Chong Yidong committed
586
*** New option `ruby-encoding-magic-comment-style'.
587

Chong Yidong's avatar
Chong Yidong committed
588
*** New option `ruby-custom-encoding-magic-comment-template'.
589

Chong Yidong's avatar
Chong Yidong committed
590
*** New mode menu.
591

Chong Yidong's avatar
Chong Yidong committed
592 593 594 595 596
*** Improved syntax highlighting and indentation.

*** Add more Ruby file types to `auto-mode-alist'.

*** New option `ruby-align-to-stmt-keywords'.
597

598
** Search and Replace
599

600 601 602 603
*** New global command `M-s .' (`isearch-forward-symbol-at-point')
starts a symbol (identifier) incremental search forward with the
symbol found near point added to the search string initially.

604 605 606
*** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
and adds it to the search string.

607 608 609
*** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
between nil and the value of the option `search-invisible' (or `open'
when it's nil).
610

611 612 613
*** `query-replace' skips invisible text when `search-invisible' is nil,
and opens overlays with hidden text when `search-invisible' is `open'.

Juri Linkov's avatar
Juri Linkov committed
614 615 616 617
*** A negative prefix arg of replacement commands replaces backward.
`M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
backward, `M-s w words M-- M-%' replaces a sequence of words backward.

618 619 620 621
+++
*** By default, prefix arguments do not now terminate Isearch mode.
Set `isearch-allow-prefix' to nil to restore old behavior.

622 623 624 625
*** More Isearch commands accept prefix arguments, namely
`isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
`isearch-yank-line'.

626 627 628 629 630 631 632 633
*** Word search now matches whitespace at the beginning/end
of the search string if it contains leading/trailing whitespace.
In an incremental word search or when using a non-nil LAX argument
of `word-search-regexp', the lax matching can also match part of
the first word (in addition to the lax matching of the last word).
The same rules are now applied to the symbol search with the difference
that it matches symbols, and non-symbol characters between symbols.

Chong Yidong's avatar
Chong Yidong committed
634 635
+++
** SES
Bill Wohler's avatar
Bill Wohler committed
636

Chong Yidong's avatar
Chong Yidong committed
637
*** New command `ses-rename-cell' allows assigning names to SES cells.
638

Chong Yidong's avatar
Chong Yidong committed
639
** Shell
640

Chong Yidong's avatar
Chong Yidong committed
641 642 643 644
*** `explicit-bash-args' now always defaults to use --noediting.
During initialization, Emacs no longer expends a process to decide
whether it is safe to use Bash's --noediting option.  These days
--noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
645

Chong Yidong's avatar
Chong Yidong committed
646 647 648
*** The SMIE indentation engine is now used by default.

** Shell Script mode
649

Chong Yidong's avatar
Chong Yidong committed
650 651
*** `sh-mode' now has the mode own `add-log-current-defun-function'.
You can pick the name of the function and the variables with `C-x 4 a'.
652

Chong Yidong's avatar
Chong Yidong committed
653 654 655 656 657 658 659
** SMIE indentation can be customized via `smie-config'.
The customization can be guessed by Emacs by providing a sample indented
file and letting SMIE learn from it.

** Term mode

*** New option `term-suppress-hard-newline'.
660

661 662 663 664 665
** Todo mode has been rewritten and enhanced.
New features include:
- support for multiple todo files and archive files of done items;
- renaming, reordering, moving, merging, and deleting categories;
- sortable tabular summaries of categories and the types of items they contain;
Paul Eggert's avatar
Paul Eggert committed
666
- cross-category lists of items filtered by specific criteria;
667 668 669 670 671 672 673
- more fine-grained interaction with the Emacs diary, by being able to decide
  for each todo item whether it appears in the Fancy Diary display;
- highly flexible new item insertion and item editing;
- moving items between categories, storing done items in their category or in
  archive files, undoing or unarchiving done items;
- reprioritizing items by inputting a numerical priority;
- extensive customizability of operation and display, including numerous faces.
674
The Todo mode user manual describes all commands and most user options.
675 676 677 678 679 680
To support some of these features, a new file format is used, which is
incompatible with the old format; however, you can convert old todo and done
item files to the new format on initializing the first new todo file, or at any
later time with the provided conversion command.  The old version of
todo-mode.el has been made obsolete and renamed otodo-mode.el.

Chong Yidong's avatar
Chong Yidong committed
681 682 683 684 685 686 687 688 689
** trace-function was largely rewritten.
New features include:
- no prompting for the destination buffer, unless a prefix-arg was used.
- additionally to prompting for a destination buffer, when a prefix-arg is
  used, the user can enter a "context", i.e. Lisp expression whose value at the
  time the function is entered/exited will be printed along with the function
  name and arguments.  Useful to trace the value of (current-buffer) or
  (point) when the function is invoked.

690
** Tramp
691

692 693
*** The experimental url syntax for remote file names is withdrawn.

694 695
+++
*** New connection method "adb", which allows to access Android
696 697
devices by the Android Debug Bridge.  The variable `tramp-adb-program'
can be used to adapt the path of the "adb" program, if needed.
698

699 700 701 702
*** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
"scpc" and "rsyncc" are discontinued.  The ssh option
"ControlMaster=auto" is set automatically in all ssh-based methods,
when possible.
703

704 705 706
+++
*** Handlers for `file-acl' and `set-file-acl' for remote machines
which support POSIX ACLs.
707

708 709 710 711
+++
*** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
for remote machines which support filesystem notifications.

Chong Yidong's avatar
Chong Yidong committed
712
** VC and related modes
713

Xue Fuqiao's avatar
Xue Fuqiao committed
714
+++
Chong Yidong's avatar
Chong Yidong committed
715 716
*** In VC directory mode, `D' displays diffs between VC-controlled
whole tree revisions.
717

Xue Fuqiao's avatar
Xue Fuqiao committed
718
+++
Chong Yidong's avatar
Chong Yidong committed
719 720
*** In VC directory mode, `L' lists the change log for the current VC
controlled tree in a window.
721

Xue Fuqiao's avatar
Xue Fuqiao committed
722
+++
Chong Yidong's avatar
Chong Yidong committed
723 724
*** In VC directory mode, `I' shows a log of changes that will be
received with a pull operation.
725

Xue Fuqiao's avatar
Xue Fuqiao committed
726
+++
Chong Yidong's avatar
Chong Yidong committed
727 728 729
*** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
under current version control system.  When called with a prefix
argument, you can remove a file from the ignored file list.
730

Chong Yidong's avatar
Chong Yidong committed
731 732
*** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
because it is moved to vc-cvs.el.
733

Chong Yidong's avatar
Chong Yidong committed
734
** VHDL mode
735

Chong Yidong's avatar
Chong Yidong committed
736
*** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
737

Chong Yidong's avatar
Chong Yidong committed
738
*** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
739

Chong Yidong's avatar
Chong Yidong committed
740
** Woman
741

Chong Yidong's avatar
Chong Yidong committed
742 743
*** The commands `woman-default-faces' and `woman-monochrome-faces'
are obsolete.  Customize the `woman-*' faces instead.
744

Chong Yidong's avatar
Chong Yidong committed
745 746
** Obsolete packages:

747 748
*** Iswitchb is made obsolete by icomplete-mode.

Chong Yidong's avatar
Chong Yidong committed
749 750
*** longlines.el is obsolete; use visual-line-mode instead.

Glenn Morris's avatar
Glenn Morris committed
751 752 753
+++
*** sup-mouse.el.

Chong Yidong's avatar
Chong Yidong committed
754 755
*** terminal.el is obsolete; use term.el instead.

756 757
*** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.

Michael Albinus's avatar
Michael Albinus committed
758 759
*** xesam.el.

Glenn Morris's avatar
Glenn Morris committed
760 761 762
+++
*** yow.el is obsolete; use fortune.el or cookie1.el instead.

Glenn Morris's avatar
Glenn Morris committed
763 764 765 766
---
*** The Info-edit command is obsolete.  Editing Info nodes by hand
has not been relevant for some time.

767

768
* New Modes and Packages in Emacs 24.4
Juanma Barranquero's avatar
Juanma Barranquero committed
769

Chong Yidong's avatar
Chong Yidong committed
770 771 772 773
** New package `eww' is a built-in web browser.
It is only available if Emacs is compiled with libxml2 support.

** New minor mode `superword-mode', defined in subword.el
Ted Zlatanov's avatar
Ted Zlatanov committed
774 775 776 777
`superword-mode' overrides the default word motion commands to treat
symbol_words as a single word, similar to what `subword-mode' does and
using the same internal functions.

Chong Yidong's avatar
Chong Yidong committed
778
** New package nadvice.el offers lighter-weight advice facilities.
779 780 781 782 783 784
It is layered as:
- add-function/remove-function which can be used to add/remove code on any
  function-carrying place, such as process-filters or `<foo>-function' hooks.
- advice-add/advice-remove to add/remove a piece of advice on a named function,
  much like `defadvice' does.

Chong Yidong's avatar
Chong Yidong committed
785
** New package frameset.el.
786 787 788 789 790
It provides a set of operations to save a frameset (the state of all
or a subset of the existing frames and windows, somewhat similar to a
frame configuration), both in-session and persistently, and restore it
at some point in the future.

Michael Albinus's avatar
Michael Albinus committed
791
+++
Chong Yidong's avatar
Chong Yidong committed
792 793
** New package filenotify.el provides an interface for file system
notifications.  It requires that Emacs be compiled with one of the
794 795
low-level libraries gfilenotify.c, inotify.c or w32notify.c.

Glenn Morris's avatar
Glenn Morris committed
796

797
* Incompatible Lisp Changes in Emacs 24.4
798

799 800
** `kill-region' lost its `yank-handler' optional argument.

801 802 803
** `(input-pending-p)' no longer runs other timers which are ready to
run.  The new optional CHECK-TIMERS param allows for the prior behavior.

804 805
** `defvar' and `defcustom' in a let-binding affect the "external" default.

806 807 808
** The syntax of ?» and ?« is now punctuation instead of matched parens.
Some languages match those as »...« and others as «...» so better stay neutral.

Chong Yidong's avatar
Chong Yidong committed
809 810
** In compiled Lisp files, the header no longer includes a timestamp.

811
** The default file coding for Emacs Lisp files is now utf-8.
Chong Yidong's avatar
Chong Yidong committed
812 813 814 815 816
(See `file-coding-system-alist'.)  In most cases, this change is
transparent, but files that contain unusual characters without
specifying an explicit coding system may fail to load with obscure
errors.  You should either convert them to utf-8 or add an explicit
`coding:' cookie.
817

Chong Yidong's avatar
Chong Yidong committed
818
** `overriding-terminal-local-map' no longer replaces the local keymaps.
819 820 821
It used to disable the minor mode, major mode, and text-property keymaps,
whereas now it simply has higher precedence.

Juanma Barranquero's avatar
Juanma Barranquero committed
822
** Default process filters and sentinels are not nil any more.
823 824
Instead they default to a function which does what the nil value used to do.

825 826 827 828 829
** `read-event' does not return decoded chars in ttys any more.
Just as was the case in Emacs-22 and before, decoding of tty input according to
keyboard-coding-system is not performed in read-event any more.  But contrary
to that past, it is still done before input-decode-map/function-key-map/...

830 831
** Removed inhibit-local-menu-bar-menus.

832 833 834 835
** frame-local variables that affect redisplay do not work any more.
More specifically, the redisplay does not bother to check for a frame-local
value when looking up variables.

836 837 838 839
** nil and "unbound" are indistinguishable in symbol-function.
`symbol-function' never signals `void-function' any more.
`fboundp' returns non-nil if the symbol was `fset' to nil.

840 841
** `defadvice' does not honor the `freeze' flag and cannot advise
special-forms any more.
842

843 844 845 846
** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
VAR was bound to nil which was not tremendously useful and just lead to
spurious warnings about an unused var.

847 848 849 850 851 852
** The return value of `backup-buffer' has changed.
The second argument is no longer an SELinux context, instead it is an
alist of extended attributes as returned by the new function
`file-extended-attributes'.  The attributes can be applied to another
file using `set-file-extended-attributes'.

Paul Eggert's avatar
Paul Eggert committed
853 854 855
** `visited-file-modtime' now returns -1 for nonexistent files.
Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
in the presence of files with negative time stamps.
856 857

** The cars of the elements in `interpreter-mode-alist' are now treated
858 859 860
as regexps rather than literal strings.  Technically this is an
incompatible change, but unless you are using interpreter-mode-alist
for something (not just adding elements to it), it ought not to affect you.
861

Glenn Morris's avatar
Glenn Morris committed
862

863
* Lisp Changes in Emacs 24.4
864

Chong Yidong's avatar
Chong Yidong committed
865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887
** New variable `enable-dir-local-variables'.
Directory-local variables are ignored if this is set to nil.  This may
be useful for modes that want to ignore directory-locals while still
respecting file-local variables.

** New macro `define-alternatives' can be used to define generic commands.
Generic commands are interactive functions whose implementation can be
selected among several alternatives, as a matter of user preference.

** New function `get-pos-property'.

** Minibuffer changes

*** completing-read-multiple's separator can now be a regexp.
The default separator is changed to allow surrounding spaces around the comma.

*** New option `read-regexp-defaults-function' defines the function
that provides the default value for commands that ask for a regexp:
`rgrep', `lgrep' `occur', `multi-occur', `multi-occur-in-matching-buffers',
`highlight-regexp', `highlight-lines-matching-regexp', `highlight-phrase'.
This option can be customized to values that provide a default value
from the regexp last history element or from the symbol found at point.

888 889 890 891 892
** New option `load-prefer-newer', if non-nil, means that when both
.el and .elc versions of a file exist, rather than `load' always
choosing the .elc version, it will choose whichever is newer
(unless you explicitly specify one or the other).

893 894
** New hook `pre-redisplay-function'.

895
+++
Eli Zaretskii's avatar
Eli Zaretskii committed
896 897
** Functions that pop up menus and dialogs now work on all terminal types,
including TTYs.
Eli Zaretskii's avatar
Eli Zaretskii committed
898 899 900
This includes `x-popup-menu', `x-popup-dialog', `message-box',
`yes-or-no-p', etc.

901 902 903 904
The function `display-popup-menus-p' will now return non-nil for a
display or frame whenever a mouse is supported on that display or
frame.

905 906 907 908 909 910
** New bool-vector set operation functions:
*** `bool-vector-exclusive-or'
*** `bool-vector-union'
*** `bool-vector-intersection'
*** `bool-vector-set-difference'
*** `bool-vector-not'
Xue Fuqiao's avatar
Xue Fuqiao committed
911
*** `bool-vector-subsetp'
912 913
*** `bool-vector-count-consecutive'
*** `bool-vector-count-population'
914

915
+++
916 917
** Comparison functions =, <, >, <=, >= now take many arguments.

918 919 920
** The second argument of `eval' can now be a lexical-environment.

** `with-demoted-errors' takes an additional argument `format'.
921 922 923
+++
** New function `define-error'.

924 925
** New hook `tty-setup-hook'.

926 927 928
+++
** New macro with-eval-after-load.  Like eval-after-load, but better behaved.

929
** New library subr-x.el for misc helper functions
930 931
*** `hash-table-keys'
*** `hash-table-values'
932 933
*** `string-blank-p`
*** `string-empty-p`
934
*** `string-join`
935
*** `string-reverse`
936 937 938
*** `string-trim-left'
*** `string-trim-right'
*** `string-trim'
939 940
*** `string-remove-prefix'
*** `string-remove-suffix'
941

942
** Obsoleted functions:
943
*** `log10'
944 945 946 947
*** `dont-compile'
*** `lisp-complete-symbol'
*** `field-complete'
*** `minibuffer-completion-contents'
948 949
*** `isearch-nonincremental-exit-minibuffer'
*** `isearch-filter-visible'
950
*** `generic-make-keywords-list'
951

952 953 954 955 956 957
** `with-wrapper-hook' is obsoleted by `add-function'.
The few hooks that used with-wrapper-hook are replaced as follows:
*** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
*** `completion-in-region-function' obsoletes `completion-in-region-functions'.
*** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.

958 959 960
** `byte-compile-interactive-only-functions' is now obsolete.
It has been replaced by the symbol property 'interactive-only.

961 962 963
** `split-string' now takes an optional argument TRIM.
The value, if non-nil, is a regexp that specifies what to trim from
the start and end of each substring.
964

965 966
** New function `string-suffix-p'.

967 968
** `get-upcase-table' is obsoleted by the new `case-table-get-table'.

Chong Yidong's avatar
Chong Yidong committed
969 970 971
** File-handling changes

*** Support for filesystem notifications.
972 973
Emacs now supports notifications of filesystem changes, such as
creation, modification, and deletion of files.  This requires the
974 975 976
`glib' API, or the 'inotify' API (on GNU/Linux systems only).  On
MS-Windows systems, this is supported for Windows XP and newer
versions.
977

Chong Yidong's avatar
Chong Yidong committed
978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995
*** The 9th element returned by `file-attributes' is now unspecified.
Formerly, it was t if the file's gid would change if file were deleted
and recreated.  This value has been inaccurate for years on many
platforms, and nobody seems to have noticed or cared.

*** The 6th argument to `copy-file' has been renamed to
PRESERVE-EXTENDED-ATTRIBUTES as it now handles both SELinux context
and ACL entries.

*** The function `file-ownership-preserved-p' now has an optional
argument GROUP which causes it check for file group too.  This can be
used in place of the 9th element of `file-attributes'.


*** The function `set-visited-file-modtime' now accepts a 0 or -1
argument, with the same interpretation as the returned value of
`visited-file-modtime'.

996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009
** Changes in autorevert.el

---
*** If Emacs is compiled with file notification support, notifications
are used instead of checking the time stamp of the files.  You can
disable this by setting the user option `auto-revert-use-notify' to
nil.  Alternatively, a regular expression of directories to be
excluded from file notifications can be specified by
`auto-revert-notify-exclude-dir-regexp'.

---
*** The new user option `auto-revert-remote-files' enables reversion
of remote files when set to non-nil.

1010 1011
** Face changes

Juanma Barranquero's avatar
Juanma Barranquero committed
1012
*** The function `face-spec-set' is now analogous to `setq' for face specs.
1013 1014 1015 1016
Its third arg now accepts values specifying exactly which face spec to
set (defface, custom, or user spec), and it directly sets the relevant
property using the supplied face spec.

Chong Yidong's avatar
Chong Yidong committed
1017 1018 1019
*** New function `add-face-text-property', which can be used to
conveniently prepend/append new face properties.

1020 1021 1022
*** Face specs set via Custom themes now replace the `defface' spec
rather than inheriting from it (as do face specs set via Customize).

1023 1024 1025
*** New face characteristic (supports :underline (:style wave))
specifies whether or not the terminal can display a wavy line.

Jan Djärv's avatar
Jan Djärv committed
1026
*** New face spec attribute :distant-foreground
Xue Fuqiao's avatar
Xue Fuqiao committed
1027 1028
specifies foreground to use if background color is near the foreground
color that would otherwise have been used.
Jan Djärv's avatar
Jan Djärv committed
1029

1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044
** Image API

+++
*** `image-animated-p' is now `image-multi-frame-p'.
It returns non-nil for any image that contains multiple frames,
whether or not it specifies a frame delay.

+++
*** When animating images that do not specify a frame delay,
Emacs uses `image-default-frame-delay'.

+++
*** New functions `image-current-frame' and `image-show-frame' for getting
and setting the current frame of a multi-frame image.

1045 1046
*** You can change the speed of animated images.

1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068
** EIEIO

*** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
**** object-name -> eieio-object-name
**** object-class -> eieio-object-class
**** object-class-fast -> eieio--object-class
**** object-name-string -> eieio-object-name-string
**** object-num-slots -> eieio--object-num-slots
**** object-set-name-string -> eieio-object-set-name-string
**** class-parent -> eieio-class-parent
**** class-parents -> eieio-class-parents
**** class-children -> eieio-class-children
**** class-num-slots -> eieio--class-num-slots
**** class-precedence-list -> eieio-class-precedence-list
**** All generated class-* and object-* field accessors are now
prefixed with `eieio-' as well.

*** Obsoleted functions:
**** class-of
**** class-direct-subclasses
**** class-direct-superclasses

1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097
** Changes in encoding and decoding of text

---
*** New coding-system `prefer-utf-8'.
This is like `undecided' but prefers UTF-8 on decoding if the text to
be decoded does not contain any invalid UTF-8 sequences.  On encoding,
any non-ASCII characters are automatically encoded as UTF-8.

---
*** New attributes of coding-systems whose type is `undecided'.
Two new attributes, `:inhibit-null-byte-detection' and
`:inhibit-iso-escape-detection', determine how to detect encoding of
text that includes null bytes and ISO-2022 escape sequences,
respectively.  Each of these attributes can be either nil, zero, or
t.  If it is t, decoding text ignores null bytes and, respectively,
ISO-2022 sequences.  If it is nil, null bytes cause text to be decoded
with no-conversion and ISO-2022 sequences cause Emacs to assume the
text is encoded in one of the ISO-2022 encodings, such as
iso-2022-7bit.  If the value is zero, Emacs consults the variables
inhibit-null-byte-detection and inhibit-iso-escape-detection, which
see.
The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
UTF-8 encoding and decoding, whenever possible.

These attributes are only meaningful for coding-systems of type
`undecided'.  (The type of a coding-system is determined by its
`:coding-type' attribute and can be accessed by calling the
`coding-system-type' function.)

Chong Yidong's avatar
Chong Yidong committed
1098 1099 1100
** `time-to-seconds' is not obsolete any more.

** New functions `special-form-p' and `macrop'.
Paul Eggert's avatar
Paul Eggert committed
1101

1102 1103 1104
** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
text-property on the first char.

1105 1106 1107
** The `defalias-fset-function' property lets you catch calls to defalias
and redirect them to your own function instead of `fset'.

1108
** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
1109 1110 1111 1112 1113 1114 1115
When you edit DIR/FILE, Emacs normally creates a symbolic link
DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
is being edited.  Formerly, if there was already a non-symlink file
named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
through DIR/.#FILE.9.  These fallbacks have been removed, so that
Emacs now no longer locks DIR/FILE in that case.

1116 1117
On file systems that do not support symbolic links, the lock is now a
regular file with contents being what would have been in the symlink.
1118

1119 1120
** New functions `group-gid' and `group-real-gid'.

1121 1122 1123 1124 1125
** The `common-substring' argument of display-completion-list is obsolete.
Either use `completion-all-completions' which already returns highlighted
strings (including for partial or substring completion) or call
`completion-hilit-commonality' to add the highlight.

1126 1127 1128
** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4

*** The package descriptor and name of global variables, constants,
Paul Eggert's avatar
Paul Eggert committed
1129
and functions should be separated by two hyphens if the symbol is not
1130 1131
meant to be used by other packages.

Glenn Morris's avatar
Glenn Morris committed
1132

1133
* Changes in Emacs 24.4 on Non-Free Operating Systems
1134

1135 1136 1137 1138
** The procedure for building Emacs on MS-Windows has changed.
It is now built by running the same configure script as on all other
platforms.  This requires the MSYS environment and MinGW development
tools.  See the updated instructions in nt/INSTALL for details.
1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151

Using the Posix configure script and Makefile's also means a change in
the directory structure of the Emacs installation on Windows.  It is
now the same as on GNU and Unix systems.  In particular, the auxiliary
programs, such as cmdproxy.exe and hexl.exe, are in
libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
version), version-independent site-lisp is in share/emacs/site-lisp,
version-specific Lisp files are in share/emacs/VERSION/lisp and in
share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
files are in share/emacs/VERSION/etc.  (Emacs knows about all these
directories and will find the files in there automatically; there's no
need to set any variables due to this change.)

Eli Zaretskii's avatar
Eli Zaretskii committed
1152 1153 1154 1155 1156 1157 1158 1159
+++
** Emacs on Windows 2000 and later can now access files and directories
whose names cannot be encoded in the current system codepage.

The new variable `w32-unicode-filenames' controls this feature: if it
is t, Emacs uses Unicode APIs to pass file names to system calls,
which lifts the limitation of file names to the current locale.

1160 1161