NEWS 116 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 18 19 20 21 22
Temporary note:
+++ indicates that the appropriate manual has already been updated.
--- means no change in the manuals is called for.
When you add a new item, please add it without either +++ or ---
so we will look at it and add it to the manual.

23 24

* Installation Changes in Emacs 24.4
25

26
** Emacs can 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

31 32 33 34 35 36
** Emacs can be compiled with file notification support.
The configure option `--with-file-notification=LIB' enables file
notification support in Emacs. This option's value should be `yes',
`no', `gfile', `inotify' or `w32'.  `yes' is a synonym for `w32' on
MS-Windows, and for `gfile' otherwise.  The default value is `yes'.

37
** The configure option --with-crt-dir has been removed.
38 39 40 41 42 43 44 45 46
It is no longer needed, as the crt*.o files are no longer linked
specially.

** Emacs for MS-Windows can now be built by running the configure script
using the MSYS environment and MinGW development tools.
This is from now on the preferred method of building Emacs on
MS-Windows.  The Windows-specific configure.bat and makefile.w32-in
files are deprecated.  See the file nt/INSTALL.MSYS for detailed
instructions.
47

48 49 50 51 52 53 54 55 56 57 58 59
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.)

Glenn Morris's avatar
Glenn Morris committed
60

61
* Startup Changes in Emacs 24.4
Glenn Morris's avatar
Glenn Morris committed
62 63


64
* Changes in Emacs 24.4
65

66 67
** Key ? also describes prefix bindings like C-h.

68 69 70 71 72 73 74
+++
** `apropos-variable' is now `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.

75 76 77 78
+++
** `eval-defun' on an already defined defcustom calls the :set function,
if there is one.

79 80 81 82
** If the new variable `enable-dir-local-variables' is nil,
directory local variables are ignored.  May be useful for some modes
that want to ignore directory-locals while still respecting file-locals.

83 84 85 86
** 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.

87 88 89
** `initial-buffer-choice' can now specify a function to set up the
initial buffer.

90 91
** `write-region-inhibit-fsync' now defaults to t in batch mode.

92 93 94 95 96
** ACL support has been added.
+++
*** Emacs preserves the ACL entries of files when backing up.
+++
*** New functions `file-acl' and `set-file-acl' get and set the ACL
97 98 99
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.
100

101
** New option `scroll-bar-adjust-thumb-portion'.
102 103 104
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).
105

106 107
** In compiled Lisp files, the header no longer includes a timestamp.

108 109 110 111 112 113
** 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.

Glenn Morris's avatar
Glenn Morris committed
114

115
* Editing Changes in Emacs 24.4
116

117 118 119 120 121
** `split-window' is no longer a command, just a non-interactive function.
As a command it was a special case of `split-window-below', and as such
superfluous.  After being reimplemented in Lisp, its interactive form
was mistakenly retained.

122 123
** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
bound to <f11> and M-<f10>, respectively.
124

125 126 127
** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
Eg View mode, etc.

128 129
** New command `kmacro-to-register' to store keyboard macros in registers.

130 131 132 133 134
** Shell Script mode

*** `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'.

135

136
* Changes in Specialized Modes and Packages in Emacs 24.4
137

138 139 140 141 142 143 144 145 146 147 148 149
** `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'.

150 151 152 153 154 155
** `remember' can now store notes in separates files
You can use the new function `remember-store-in-files' within the
`remember-handler-functions' option.

See `remember-data-directory' and `remember-directory-file-name-format'
for new options related to this function.
156 157
** `ido-decorations' has been slightly extended to give a bit more control.

Stefan Monnier's avatar
Stefan Monnier committed
158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176
** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
Affected files:
~/.emacs.d/timelog	replaces  ~/.timelog
~/.emacs.d/todo-do	replaces  ~/.todo-do
~/.emacs.d/todo-done	replaces  ~/.todo-done
~/.emacs.d/todo-top	replaces  ~/.todo-top
~/.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
177

178 179 180 181 182 183
** Delphi mode is now called OPascal 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'.

184 185
** Eldoc Mode works properly in the minibuffer.

186 187
** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.

188 189 190
** completing-read-multiple's separator can now be a regexp.
The default separator is changed to allow surrounding spaces around the comma.

191 192 193 194
** Battery

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

195 196 197
** Calendar and Diary

+++
Glenn Morris's avatar
Glenn Morris committed
198
*** New variable `diary-from-outlook-function', used by the command
199 200
`diary-from-outlook'.

201 202 203 204 205 206 207
** cl-lib

*** New macro cl-tagbody.

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

208 209 210 211 212 213 214 215 216 217 218 219 220 221
** 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.

222 223
*** Support for ISO 8601 dates.

224 225 226 227 228
** Desktop

*** `desktop-auto-save-timeout' defines the number of seconds between
auto-saves of the desktop.

229 230 231 232
** Dired

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

233 234 235 236 237 238
** 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.

239 240 241
---
** New F90 mode option `f90-smart-end-names'.

242 243 244 245 246
** 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.

247
** Image mode
248 249 250 251 252

*** 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.

253 254 255 256
*** 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.

257 258 259 260 261 262
---
*** 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.

263 264 265 266 267 268
** 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'.

269 270 271 272 273 274 275 276 277 278
** 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.

279
** Search and Replace
280

281 282 283 284
*** 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.

285 286 287
*** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
and adds it to the search string.

288 289 290
*** `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).
291

292 293 294
*** `query-replace' skips invisible text when `search-invisible' is nil,
and opens overlays with hidden text when `search-invisible' is `open'.

295 296 297 298
+++
*** By default, prefix arguments do not now terminate Isearch mode.
Set `isearch-allow-prefix' to nil to restore old behavior.

Bill Wohler's avatar
Bill Wohler committed
299
** MH-E has been updated to MH-E version 8.5.
Bill Wohler's avatar
Bill Wohler committed
300 301
See MH-E-NEWS for details.

302 303 304 305 306 307 308 309
---
** The unrmail command converts from BABYL to mboxrd rather than mboxo.
Customize `unrmail-mbox-format' to change this.

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

310 311 312
+++
** New function `ses-rename-cell' to give SES cells arbitrary names.

313 314 315 316 317 318 319 320 321
** 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.

322 323
** New command `delete-duplicate-lines' has new types of operation:
When its arg ADJACENT is non-nil (when called interactively with C-u C-u)
324 325
it works like the utility `uniq'.  Otherwise by default it deletes
duplicate lines everywhere in the region without regard to adjacency.
326 327
When it arg KEEP-BLANKS is non-nil (when called interactively with C-u C-u C-u),
duplicate blank lines are preserved.
328

329 330 331 332 333
** New `cycle-spacing' command allows cycling between having just one
space, no spaces, or reverting to the original spacing.  Like
`just-one-space' command it can handle or ignore newlines and
leave different number of spaces.

334
** Tramp
335

336 337
+++
*** New connection method "adb", which allows to access Android
338 339
devices by the Android Debug Bridge.  The variable `tramp-adb-program'
can be used to adapt the path of the "adb" program, if needed.
340

341 342 343 344
*** 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.
345

346 347 348
+++
*** Handlers for `file-acl' and `set-file-acl' for remote machines
which support POSIX ACLs.
349

Glenn Morris's avatar
Glenn Morris committed
350 351 352 353 354 355
** VHDL mode

*** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.

*** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.

356 357 358 359 360
** Woman

*** The commands `woman-default-faces' and `woman-monochrome-faces'
are obsolete.  Customize the `woman-* faces instead.

361 362 363 364 365 366 367
** Eshell

*** 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.

Chong Yidong's avatar
Chong Yidong committed
368 369 370 371
** Obsolete packages:

*** longlines.el is obsolete; use visual-line-mode instead.

Glenn Morris's avatar
Glenn Morris committed
372 373 374
+++
*** sup-mouse.el.

Chong Yidong's avatar
Chong Yidong committed
375 376
*** terminal.el is obsolete; use term.el instead.

Michael Albinus's avatar
Michael Albinus committed
377 378
*** xesam.el.

Glenn Morris's avatar
Glenn Morris committed
379 380 381
+++
*** yow.el is obsolete; use fortune.el or cookie1.el instead.

Glenn Morris's avatar
Glenn Morris committed
382 383 384 385
---
*** The Info-edit command is obsolete.  Editing Info nodes by hand
has not been relevant for some time.

386

387
* New Modes and Packages in Emacs 24.4
Ted Zlatanov's avatar
Ted Zlatanov committed
388 389 390 391 392
** New `superword-mode' in subword.el
`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.

393 394 395 396 397 398 399
** New nadvice.el package offering lighter-weight advice facilities.
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.

Glenn Morris's avatar
Glenn Morris committed
400

401
* Incompatible Lisp Changes in Emacs 24.4
402

403 404 405 406
** overriding-terminal-local-map does not replace the local keymaps any more.
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
407
** Default process filters and sentinels are not nil any more.
408 409
Instead they default to a function which does what the nil value used to do.

410 411 412 413 414
** `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/...

415 416
** Removed inhibit-local-menu-bar-menus.

417 418 419 420
** 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.

421 422 423 424
** 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.

425 426
** `defadvice' does not honor the `freeze' flag and cannot advise
special-forms any more.
427

428 429 430 431
** `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.

432 433 434 435 436 437
** 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'.

Glenn Morris's avatar
Glenn Morris committed
438

439
* Lisp Changes in Emacs 24.4
440

441 442 443 444 445
** Obsoleted functions:
*** `dont-compile'
*** `lisp-complete-symbol'
*** `field-complete'
*** `minibuffer-completion-contents'
446 447
*** `isearch-nonincremental-exit-minibuffer'
*** `isearch-filter-visible'
448
*** `generic-make-keywords-list'
449

450 451 452 453 454 455 456
** `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'.


457 458
** `get-upcase-table' is obsoleted by the new `case-table-get-table'.

459 460 461
** Support for filesystem notifications.
Emacs now supports notifications of filesystem changes, such as
creation, modification, and deletion of files.  This requires the
462 463 464
`glib' API, or the 'inotify' API (on GNU/Linux systems only).  On
MS-Windows systems, this is supported for Windows XP and newer
versions.
465

466 467 468 469 470 471 472 473 474 475 476 477 478 479
** 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.

480 481 482 483 484 485 486 487 488 489
** Face changes

*** The `face-spec-set' is now analogous to `setq' for face specs.
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.

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

490 491 492
*** New face characteristic (supports :underline (:style wave))
specifies whether or not the terminal can display a wavy line.

493 494 495 496 497 498 499 500 501 502 503 504 505 506 507
** 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.

508
** time-to-seconds is not obsolete any more.
509
** New function special-form-p.
510 511 512
** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
text-property on the first char.

513 514 515
** The `defalias-fset-function' property lets you catch calls to defalias
and redirect them to your own function instead of `fset'.

516
** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
517 518 519 520 521 522 523
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.

524 525
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.
526

527 528 529 530 531 532 533 534 535 536 537
** 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 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'.

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

538 539 540 541
** The 6th argument to `copy-file' has been renamed to
`preserve-extended-attributes' as it now handles both SELinux context
and ACL entries.

542 543 544
** 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
545
and functions should be separated by two hyphens if the symbol is not
546 547
meant to be used by other packages.

Glenn Morris's avatar
Glenn Morris committed
548

549
* Changes in Emacs 24.4 on Non-Free Operating Systems
550

551 552 553 554 555
+++
** The "generate a backtrace on fatal error" feature now works on MS Windows.
The backtrace is written to the 'emacs_backtrace.txt' file in the
directory where Emacs was running.

556 557 558 559 560 561
+++
** The variable `buffer-file-type' is no longer supported.
Setting it has no effect, and %t in the mode-line format is ignored.
Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
modifying it has no effect.

562 563 564 565 566 567 568
---
** Lock files now work on MS-Windows.
This allows to avoid losing your edits if the same file is being
edited in another Emacs session or by another user.  See the node
"Interlocking" in the Emacs User Manual for the details.  To disable
file locking, customize `create-lockfiles' to nil.

Glenn Morris's avatar
Glenn Morris committed
569 570 571 572 573
** Improved fullscreen support on Mac OS X.
Both native (>= OSX 10.7) and "old style" fullscreen are supported.
Customize `ns-use-native-fullscreen' to change style.  For >= 10.7
native is the default.

Glenn Morris's avatar
Glenn Morris committed
574

575
* Installation Changes in Emacs 24.3
576

577
** The default X toolkit is now Gtk+ version 3.
Glenn Morris's avatar
Glenn Morris committed
578 579 580
If you don't pass `--with-x-toolkit' to configure, or if you use
`--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
Glenn Morris's avatar
Glenn Morris committed
581
You can explicitly require a specific version by passing
Glenn Morris's avatar
Glenn Morris committed
582
`--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
583

584
** New configure option `--enable-link-time-optimization', to utilize
585 586
an appropriate feature provided by GCC since version 4.5.0.

Glenn Morris's avatar
Glenn Morris committed
587 588
** New configure option `--without-all' to disable most of the optional
features (image support, etc.) that are normally enabled by default.
589

Glenn Morris's avatar
Glenn Morris committed
590 591
** New configure option `--enable-gcc-warnings' (for developing/debugging
Emacs).  If building with GCC, this enables compile-time checks that
Glenn Morris's avatar
Glenn Morris committed
592 593 594
warn/give errors about possibly-questionable C code.  On a recent GNU
system there should be no warnings; on older and on non-GNU systems
the results may be useful to developers.
595

Glenn Morris's avatar
Glenn Morris committed
596
** The configure option `--enable-use-lisp-union-type' has been
597
renamed to `--enable-check-lisp-object-type', as the resulting
Glenn Morris's avatar
Glenn Morris committed
598 599 600
Lisp_Object type no longer uses a union to implement the compile time
check that this option enables.

Glenn Morris's avatar
Glenn Morris committed
601
** The configure option `--disable-maintainer-mode' has been removed,
602 603
as it was confusingly-named and rarely useful.

Glenn Morris's avatar
Glenn Morris committed
604 605 606 607 608
** The configure options `--program-prefix', `--program-suffix', and
`--program-transform-name' apply to more than just the installed
binaries.  Now they also affect the man pages, icons, and the
etc/emacs.desktop file; but not the info pages, since this would break
links between the various manuals.
609

Glenn Morris's avatar
Glenn Morris committed
610 611
** You can use `NO_BIN_LINK=t make install' to prevent the installation
overwriting "emacs" in the installation bin/ directory with a link
612
to "emacs-VERSION".
Glenn Morris's avatar
Glenn Morris committed
613

614 615
** Emacs uses libtinfo in preference to libncurses, if available.

616 617 618 619
** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
/usr/pkg/lib to the linker search path.  You must add them yourself if
you want them.

620
** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
Glenn Morris's avatar
Glenn Morris committed
621 622 623
(from the bin and libexec directories, respectively).  The former is
no longer relevant, the latter is replaced by lisp (in vc-sccs.el).

Glenn Morris's avatar
Glenn Morris committed
624

625
* Startup Changes in Emacs 24.3
626 627 628

** Emacs no longer searches for `leim-list.el' files beneath the standard
lisp/ directory.  There should not be any there anyway.  If you have
Glenn Morris's avatar
Glenn Morris committed
629
been adding them there, put them somewhere else; e.g., site-lisp.
630

Glenn Morris's avatar
Glenn Morris committed
631 632
** The `--no-site-lisp' command line option now works for Nextstep builds.

Glenn Morris's avatar
Glenn Morris committed
633

634
* Changes in Emacs 24.3
Glenn Morris's avatar
Glenn Morris committed
635

636
** Help
637

638
*** `C-h f' (`describe-function') can now perform autoloading.
639 640 641 642 643 644 645 646 647
When this command is called for an autoloaded function whose docstring
contains a key substitution construct, that function's library is
automatically loaded, so that the documentation can be shown
correctly.  To disable this, set `help-enable-auto-load' to nil.

*** `C-h f' now reports previously-autoloaded functions as "autoloaded",
even after their associated libraries have been loaded (and the
autoloads have been redefined as functions).

648
** ImageMagick
649

650 651
*** Images displayed via ImageMagick now support transparency and the
:background image specification property.
652

653
*** When available, ImageMagick support is automatically enabled.
654 655
It is no longer necessary to call `imagemagick-register-types'
explicitly to install ImageMagick image types; that function is called
656
automatically at startup, or when customizing an imagemagick- option.
Glenn Morris's avatar
Glenn Morris committed
657

658
*** Setting `imagemagick-types-inhibit' to t now disables the use of
Glenn Morris's avatar
Glenn Morris committed
659 660
ImageMagick to view images.  (You must call `imagemagick-register-types'
afterwards if you do not use customize to change this.)
Glenn Morris's avatar
Glenn Morris committed
661

662
*** The new variable `imagemagick-enabled-types' also affects which
663 664 665
ImageMagick types are treated as images.  The function
`imagemagick-filter-types' returns the list of types that will be
treated as images.
666

667 668 669 670
** Minibuffer

*** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
next and previous path separator, respectively.
671

672 673 674 675 676 677 678 679 680 681 682 683 684 685
*** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
in minibuffer prompts.  Just set `minibuffer-eldef-shorten-default'
non-nil before enabling the mode.

** Mode line

*** New option `mode-line-default-help-echo' specifies the help text
(shown in a tooltip or in the echo area) for any part of the mode line
that does not have its own specialized help text.

*** You can now click mouse-3 in the coding system indicator to invoke
`set-buffer-file-coding-system'.

** Server and client
Glenn Morris's avatar
Glenn Morris committed
686

Chong Yidong's avatar
Chong Yidong committed
687 688 689
*** emacsclient now obeys string values for `initial-buffer-choice',
if it is told to open a new frame without specifying any file to visit
or expression to evaluate.
Glenn Morris's avatar
Glenn Morris committed
690

Chong Yidong's avatar
Chong Yidong committed
691 692 693 694 695
*** New option `server-auth-key' specifies a shared server key.

** Emacs now generates backtraces on fatal errors.
On encountering a fatal error, Emacs now outputs a textual description
of the fatal signal, and a short backtrace on platforms like glibc
696
that support backtraces.
697

698 699 700 701 702 703 704 705 706 707
** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
This minor mode replaces `toggle-read-only', which is now obsolete.

** Most `y-or-n' prompts now allow you to scroll the selected window.
Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
respectively, without exiting from the prompt.

** In the Package Menu, newly-available packages are listed as "new",
and sorted above the other "available" packages by default.

Chong Yidong's avatar
Chong Yidong committed
708 709
** If your Emacs was built from a bzr checkout, the new variable
`emacs-bzr-version' contains information about the bzr revision used.
710

711
** New option `create-lockfiles' specifies usage of lockfiles.
Chong Yidong's avatar
Chong Yidong committed
712 713
It defaults to t.  Changing it to nil inhibits the creation of lock
files (use this with caution).
714

715 716
** New option `enable-remote-dir-locals', if non-nil, allows directory-local
variables on remote hosts.
717

Chong Yidong's avatar
Chong Yidong committed
718 719 720
** The entry for PCL-CVS has been removed from the Tools menu.
The PCL-CVS commands are still available via the keyboard.

721 722 723
** Using "unibyte: t" in Lisp source files is obsolete.
Use "coding: raw-text" instead.

724 725 726 727 728
** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
The previous binding, introduced in Emacs 24.1, was a mistake, because
`C-c LETTER' bindings are reserved for user customizations.

729
** Internationalization
Glenn Morris's avatar
Glenn Morris committed
730

Chong Yidong's avatar
Chong Yidong committed
731
*** New language environment: Persian.
Glenn Morris's avatar
Glenn Morris committed
732

Chong Yidong's avatar
Chong Yidong committed
733 734
*** New input method `vietnamese-vni'.

735
** Nextstep (GNUstep / Mac OS X) port
Glenn Morris's avatar
Glenn Morris committed
736

Glenn Morris's avatar
Glenn Morris committed
737
*** Support for fullscreen and the frame parameter fullscreen.
Glenn Morris's avatar
Glenn Morris committed
738

739 740 741
*** A file dialog is used for open/save operations initiated from the
menu/toolbar.

Glenn Morris's avatar
Glenn Morris committed
742

743
* Editing Changes in Emacs 24.3
744

745
** Search and Replace
746

Chong Yidong's avatar
Chong Yidong committed
747 748 749 750
*** Non-regexp Isearch now performs "lax" space matching.
Each sequence of spaces in the supplied search string may match any
sequence of one or more whitespace characters, as specified by the
variable `search-whitespace-regexp'.  (This variable is also used by a
Glenn Morris's avatar
Glenn Morris committed
751
similar existing feature for regexp Isearch.)
Glenn Morris's avatar
Glenn Morris committed
752

Chong Yidong's avatar
Chong Yidong committed
753 754
*** New Isearch command `M-s SPC' toggles lax space matching.
This applies to both ordinary and regexp Isearch.
Glenn Morris's avatar
Glenn Morris committed
755

Chong Yidong's avatar
Chong Yidong committed
756 757 758
*** New option `replace-lax-whitespace'.
If non-nil, `query-replace' uses flexible whitespace matching too.
The default is nil.
Glenn Morris's avatar
Glenn Morris committed
759

760 761 762 763
*** Global `M-s _' starts a symbol (identifier) incremental search,
and `M-s _' in Isearch toggles symbol search mode.
`M-s c' in Isearch toggles search case-sensitivity.

764
** Navigation commands
765

766 767 768 769 770 771 772 773 774 775
*** New binding `M-g c' for `goto-char'.

*** New binding `M-g TAB' for `move-to-column'.

*** `M-g TAB' (`move-to-column') prompts for a column number if called
interactively with no prefix arg.  Previously, it moved to column 1.

** New option `yank-handled-properties' allows processing of text
properties on yanked text, in ways that are more general than just
removing them (as is done by `yank-excluded-properties').
776 777 778 779 780

** New option `delete-trailing-lines' specifies whether
M-x delete-trailing-whitespace should delete trailing lines at the end
of the buffer.  It defaults to t.

Chong Yidong's avatar
Chong Yidong committed
781
** `C-u M-=' now counts lines/words/characters in the entire buffer.
782

783 784
** `C-x 8 RET' is now bound to `insert-char', which is now a command.
`ucs-insert' is now an obsolete alias for `insert-char'.
785

786 787 788
** The `z' key no longer has a binding in most special modes.
It used to be bound to `kill-this-buffer', but `z' is too easy to
accidentally type.
Chong Yidong's avatar
Chong Yidong committed
789

790 791
** New command `C-x r M-w' (`copy-rectangle-as-kill').
It copies the region-rectangle as the last rectangle kill.
Chong Yidong's avatar
Chong Yidong committed
792

793
** Registers
Chong Yidong's avatar
Chong Yidong committed
794

Glenn Morris's avatar
Glenn Morris committed
795
*** `C-x r +' is now overloaded to invoke `append-to-register'.
Chong Yidong's avatar
Chong Yidong committed
796 797

*** New option `register-separator' specifies the register containing
Glenn Morris's avatar
Glenn Morris committed
798 799
the text to put between collected texts for use with
M-x append-to-register and M-x prepend-to-register.
800

Glenn Morris's avatar
Glenn Morris committed
801

802
* Changes in Specialized Modes and Packages in Emacs 24.3
Julien Danjou's avatar
Julien Danjou committed
803

804
** Common Lisp emulation (CL)
Chong Yidong's avatar
Chong Yidong committed
805

806
*** CL's main entry is now (require 'cl-lib).
Glenn Morris's avatar
Glenn Morris committed
807 808 809
`cl-lib' is like the old `cl' except that it uses the namespace cleanly;
i.e., all its definitions have the "cl-" prefix (and internal definitions
use the "cl--" prefix).
810

Glenn Morris's avatar
Glenn Morris committed
811 812 813 814 815
If `cl' provided a feature under the name `foo', then `cl-lib'
provides it under the name `cl-foo' instead; with the exceptions of the
few `cl' definitions that had to use `foo*' to avoid conflicts with
pre-existing Elisp entities.  These have been renamed to `cl-foo'
rather than `cl-foo*'.
816

Glenn Morris's avatar
Glenn Morris committed
817
The old `cl' is now deprecated and is mainly just a bunch of aliases that
Glenn Morris's avatar
Glenn Morris committed
818
provide the old, non-prefixed names.  Some exceptions are listed below:
819

820 821
*** `cl-flet' is not like `flet' (which is deprecated).
Instead it obeys the behavior of Common-Lisp's `flet'.
Glenn Morris's avatar
Glenn Morris committed
822 823
In particular, in cl-flet function definitions are lexically scoped,
whereas in flet the scoping is dynamic.
824 825

*** `cl-labels' is slightly different from `labels'.
Glenn Morris's avatar
Glenn Morris committed
826 827 828 829
The difference is that it relies on the `lexical-binding' machinery
(as opposed to the `lexical-let' machinery used previously) to capture
definitions in closures, so such closures will only work if `lexical-binding'
is in use.
830

Glenn Morris's avatar
Glenn Morris committed
831
*** `cl-letf' is not exactly like `letf'.
832 833
The only difference is in details that relate to some deprecated usage
of `symbol-function' in place forms.
Glenn Morris's avatar
Glenn Morris committed
834

835
*** `progv' was rewritten to use the `let' machinery.
Glenn Morris's avatar
Glenn Morris committed
836 837
A side effect is that variables without corresponding values are bound
to nil rather than being made unbound.
838

Glenn Morris's avatar
Glenn Morris committed
839 840 841
*** The following methods of extending `setf' are obsolete
(use features from gv.el instead):
`define-modify-macro' (use `gv-letplace')
Glenn Morris's avatar
Glenn Morris committed
842 843
`defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
`define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
Glenn Morris's avatar
Glenn Morris committed
844
`get-setf-method' no longer exists (see "Incompatible Lisp Changes")
Glenn Morris's avatar
Glenn Morris committed
845

846
** Diff mode
Chong Yidong's avatar
Chong Yidong committed
847

848 849 850 851 852
*** Changes are now highlighted using the same color scheme as in
modern VCSes.  Deletions are displayed in red (new faces
`diff-refine-removed' and `smerge-refined-removed', and new definition
of `diff-removed'), insertions in green (new faces `diff-refine-added'
and `smerge-refined-added', and new definition of `diff-added').
Chong Yidong's avatar
Chong Yidong committed
853

854 855 856
*** The variable `diff-use-changed-face' defines whether to use the
face `diff-changed', or `diff-removed' and `diff-added' to highlight
changes in context diffs.
Glenn Morris's avatar
Glenn Morris committed
857

858 859
*** The new command `diff-delete-trailing-whitespace' removes trailing
whitespace introduced by a diff.
Chong Yidong's avatar
Chong Yidong committed
860

861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880
** Ediff now uses the same color scheme as Diff mode.

** Python mode

A new version of python.el, which provides several new features, including:
per-buffer shells, better indentation, Python 3 support, and improved
shell-interaction compatible with iPython (and virtually any other
text based shell).

*** Some user options have been replaced/renamed, including (old -> new):
**** python-indent -> python-indent-offset
**** python-guess-indent -> python-indent-guess-indent-offset
**** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
**** python-use-skeletons -> python-skeleton-autoinsert

*** Some user options have been removed, including:

**** `python-indent-string-contents': Strings are never indented.

**** `python-honour-comment-indentation':
881
Comments are always considered as indentation markers.
882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916

**** `python-continuation-offset': Indentation is automatically
calculated in a pep8 compliant way depending on the context.

**** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
Have no direct mapping as the shell interaction is completely different.

**** `python-python-command', `python-jython-command':
Replaced by `python-shell-interpreter'.

**** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
`python-pdbtrack-minor-mode-string', `python-source-modes':
No longer relevant.

*** Some commands have been replaced (old -> new):
**** python-insert-class -> python-skeleton-class
**** python-insert-def -> python-skeleton-def
**** python-insert-for -> python-skeleton-for
**** python-insert-if -> python-skeleton-if
**** python-insert-try/except -> python-skeleton-try
**** python-insert-try/finally -> python-skeleton-try
**** python-insert-while -> python-skeleton-while
**** python-find-function -> python-nav-jump-to-defun
**** python-next-statement -> python-nav-forward-sentence
**** python-previous-statement -> python-nav-backward-sentence
**** python-beginning-of-defun-function -> python-nav-beginning-of-defun
**** python-end-of-defun-function -> python-nav-end-of-defun
**** python-send-buffer -> python-shell-send-buffer
**** python-send-defun -> python-shell-send-defun
**** python-send-region -> python-shell-send-region
**** python-send-region-and-go -> emulate with python-shell-send-region
and python-shell-switch-to-shell
**** python-send-string -> python-shell-send-string
**** python-switch-to-python -> python-shell-switch-to-shell
**** python-describe-symbol -> python-eldoc-at-point
Chong Yidong's avatar
Chong Yidong committed
917

Chong Yidong's avatar
Chong Yidong committed
918 919 920 921 922 923 924 925 926
** D-Bus

*** New variables `dbus-compiled-version' and `dbus-runtime-version'.

*** The D-Bus object manager interface is implemented.

*** Variables of type :(u)int32 and :(u)int64 accept floating points,
if their value does not fit into Emacs's integer range.

Glenn Morris's avatar
Glenn Morris committed
927 928
*** The function `dbus-call-method' is now non-blocking.
It can be interrupted by `C-g'.  `dbus-call-method-non-blocking' is obsolete.
Chong Yidong's avatar
Chong Yidong committed
929

Glenn Morris's avatar
Glenn Morris committed
930
*** Signals can also be sent as unicast messages.
Chong Yidong's avatar
Chong Yidong committed
931 932

*** The argument list of `dbus-register-signal' has been extended,
933
according to the new match rule types of D-Bus.
Chong Yidong's avatar
Chong Yidong committed
934 935 936 937 938

*** `dbus-init-bus' supports private connections.

*** There is a new function `dbus-setenv'.

939 940
** `desktop-path' no longer includes the "." directory.
Desktop files are now located in ~/.emacs.d by default.
Chong Yidong's avatar
Chong Yidong committed
941 942

** Dired
Glenn Morris's avatar
Glenn Morris committed
943

Chong Yidong's avatar
Chong Yidong committed
944 945 946
*** `dired-do-async-shell-command' executes each file sequentially
if the command ends in `;' (when operating on multiple files).
Otherwise, it executes the command on each file in parallel.
Glenn Morris's avatar
Glenn Morris committed
947

Glenn Morris's avatar
Glenn Morris committed
948 949
*** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
`dired-do-chown', and `dired-do-touch' yanks the attributes of the
Chong Yidong's avatar
Chong Yidong committed
950
file at point.
Glenn Morris's avatar
Glenn Morris committed
951

Chong Yidong's avatar
Chong Yidong committed
952
*** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
Glenn Morris's avatar
Glenn Morris committed
953
`DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
Chong Yidong's avatar
Chong Yidong committed
954
mark/unmark/flag all files in the active region.
Glenn Morris's avatar
Glenn Morris committed
955

Chong Yidong's avatar
Chong Yidong committed
956 957 958
*** The minibuffer default for `=' (`dired-diff) has changed.
It is now the backup file for the file at point, if one exists.
In Transient Mark mode the default is the file at the active mark.
Glenn Morris's avatar
Glenn Morris committed
959

Chong Yidong's avatar
Chong Yidong committed
960 961 962
*** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
The global binding for `M-=', `count-words-region' is in effect.

Glenn Morris's avatar
Glenn Morris committed
963 964
** ERC

965 966
*** New module "notifications", which can send a notification when you
receive a private message or your nickname is mentioned.
Glenn Morris's avatar
Glenn Morris committed
967 968 969

*** ERC will look up server/channel names via auth-source and use any
channel keys found.
Chong Yidong's avatar
Chong Yidong committed
970

Glenn Morris's avatar
Glenn Morris committed
971 972
*** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
only applies to messages sent by lurkers.
973

974
** reStructuredText mode
Chong Yidong's avatar
Chong Yidong committed
975

976 977 978
*** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
fontification, comment handling, and customization have all been revised
and improved.
Chong Yidong's avatar
Chong Yidong committed
979

980
*** Support for `imenu' and `which-function-mode'.
Chong Yidong's avatar
Chong Yidong committed
981

982 983
*** The reStructuredText syntax is more closely covered.
Sphinx support has been improved.
Chong Yidong's avatar
Chong Yidong committed
984

985
*** `rst-insert-list' inserts new list or continues existing lists.
Chong Yidong's avatar
Chong Yidong committed
986

987
*** A negative prefix argument always works for `rst-adjust'.
Chong Yidong's avatar
Chong Yidong committed
988

989
*** The window configuration is reset after displaying a TOC.
990

991
*** The constant `rst-version' describes the rst.el package version.
Glenn Morris's avatar
Glenn Morris committed
992

Glenn Morris's avatar
Glenn Morris committed
993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015
** Ruby mode

*** Support for percent literals and recognition of regular expressions
in method calls without parentheses with more methods, including Cucumber
steps definitions.

*** Improved syntax highlighting and indentation.

*** New command `ruby-toggle-block', bound to `C-c {'.

*** Some non-standard keybindings/commands have been removed:

**** `ruby-electric-brace'; use `electric-indent-mode' instead.

**** `ruby-mark-defun'; use `mark-defun'.

**** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
appropriate settings for the variables `beginning-of-defun-function'
and `end-of-defun-function'.

**** Non-standard keybindings for `backward-kill-word', `comment-region',
`reindent-then-newline-and-indent' and `newline' have been removed.

1016
** Shell Script mode
1017

1018
*** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1019

1020
*** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1021

1022
*** `sh-use-smie' lets you choose a new indentation and navigation code.
1023

1024
** VHDL mode
1025

1026
*** The free software compiler GHDL is supported (and now the default).
1027

1028
*** Support for the VHDL-AMS packages has been added/updated.
1029

1030
*** Updated to the 2002 revision of the VHDL standard.
1031

1032
*** Accepts \r and \f as whitespace.
1033

1034
** Apropos
1035

1036 1037 1038
*** The faces used by Apropos are now directly customizable.
These faces are named `apropos-symbol', `apropos-keybinding', and so on;
see the `apropos' Custom group for details.
1039

1040 1041
*** The old options whose values specified faces to use have been removed
(i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1042

1043