If gnustep-config is not available, the old heuristics are used.
---
-** The configure option `--with-pkg-config-prog' has been removed.
+** The configure option '--with-pkg-config-prog' has been removed.
Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to.
+---
+** The configure option '--with-mmdf' has been removed.
+It was no longer useful, as it relied on libraries that are no longer
+supported, and its presence led to confusion during configuration.
+This affects only the 'movemail' utility; Emacs itself can still
+process MMDF-format files as before.
+
** The configure option '--enable-silent-rules' is now the default,
and silent rules are now quieter. To get the old behavior where
'make' chatters a lot, configure with '--disable-silent-rules' or
group instead of a user if its argument is prefixed by ':' (a colon).
This will cause the game score files in ${localstatedir}/games/emacs
to be owned by that group, and the helper program for updating them to
-be installed setgid.
+be installed setgid. The option now defaults to the 'games' group.
---
** The `grep-changelog' script (and its manual page) are no longer included.
\f
* Changes in Emacs 25.1
-** `package-install-from-buffer' and `package-install-file' work on directories.
-This follows the same rules as installing from a .tar file, except the
--pkg file is optional.
+** New command `comment-line' bound to `C-x C-;'.
** New function `custom-prompt-customize-unsaved-options' checks for
unsaved customizations and prompts user to customize (if found).
In particular, it now returns the average width of the font's
characters, which can be used for geometry-related calculations.
+** A new function `default-font-width' returns the average width of a
+character in the current buffer's default font. If the default face
+is remapped (see `face-remapping-alist'), the value for the remapped
+face is returned. This function complements the existing function
+`default-font-height'.
+
+** New functions `window-font-height' and `window-font-width' return
+the height and average width of characters in a specified face and
+window. If FACE is remapped (see `face-remapping-alist'), the
+function returns the information for the remapped face.
+
+** A new function `window-max-chars-per-line' returns the maximal
+number of characters that can be displayed on one line. If a face
+and/or window are provided, these values are used for the
+calculation. This function is different from `window-body-width' in
+that it accounts for (i) continuation glyphs, (ii) the size of the
+font, and (iii) the specified window.
+
\f
* Editing Changes in Emacs 25.1
+** Successive single-char deletions are collapsed in the undo-log just like
+successive char insertions.
+
** Unicode names entered via C-x 8 RET now use substring completion by default.
** New minor mode global-eldoc-mode is enabled by default.
** You can access `mouse-buffer-menu' (C-down-mouse-1) using C-f10.
++++
+** New buffer-local `electric-pair-local-mode'.
+
\f
* Changes in Specialized Modes and Packages in Emacs 25.1
+** In xterms, killing text now also sets the CLIPBOARD/PRIMARY selection
+in the surrounding GUI (using the OSC-52 escape sequence).
+
+** xterm-mouse-mode now supports mouse-tracking (if your xterm supports it).
+
+** package.el
+*** Most functions which involve downloading information now take an
+ASYNC argument. If it is non-nil, package.el performs the download(s)
+asynchronously.
+
+*** New variable `package-menu-async' controls whether the
+package-menu uses asynchronous downloads.
+
+*** `package-install-from-buffer' and `package-install-file' work on directories.
+This follows the same rules as installing from a .tar file, except the
+-pkg file is optional.
+
+*** Packages which are dependencies of other packages cannot be deleted.
+The FORCE argument to `package-delete' overrides this.
+
+*** New custom variable `package-selected-packages' tracks packages
+which were installed by the user (as opposed to installed as
+dependencies). This variable can also be manually customized.
+
+*** New command `package-install-user-selected-packages' installs all
+packages from `package-selected-packages' which are currently missing.
+
+*** New command `package-autoremove' removes all packages which were
+installed strictly as dependencies but are no longer needed.
+
** Shell
When you invoke `shell' interactively, the *shell* buffer will now
** EIEIO
++++
*** The `:protection' slot option is not obeyed any more.
++++
*** The `newname' argument to constructors is optional&deprecated.
If you need your objects to be named, do it by inheriting from `eieio-named'.
++++
*** The <class>-list-p and <class>-child-p functions are declared obsolete.
++++
*** The <class> variables are declared obsolete.
++++
*** The <initarg> variables are declared obsolete.
*** defgeneric and defmethod are declared obsolete.
++++
+*** `constructor' is now an obsolete alias for `make-instance'.
** ido
*** New command `ido-bury-buffer-at-head' bound to C-S-b
** eww
+---
+*** HTML can now be rendered using variable-width fonts.
+
++++
+*** A new command `F' (`eww-toggle-fonts') can be used to toggle
+whether to use variable-pitch fonts or not. The user can also
+customize the `shr-use-fonts' variable.
+
+++
*** A new command `R' (`eww-readable') will try do identify the main
textual parts of a web page and display only that, leaving menus and
transformed into multipart/related messages before sending.
** pcase
-*** New UPatterns `quote' and `app'.
+*** New UPatterns `quote', `app', `cl-struct', and `eieio'.
*** New UPatterns can be defined with `pcase-defmacro'.
+++
*** New vector QPattern.
** New ERT function `ert-summarize-tests-batch-and-exit'.
+** New js.el option `js-indent-first-init'.
+
---
** `Info-fontify-maximum-menu-size' can be t for no limit.
*** Two new faces `compare-windows-removed' and `compare-windows-added'
replace the obsolete face `compare-windows'.
+** VHDL mode supports VHDL'08.
+
** Calculator: decimal display mode uses "," groups, so it's more
fitting for use in money calculations; factorial works with
non-integer inputs.
allow overriding the regular expression that recognizes the ldapsearch
command line's password prompt.
+** Eshell
+
+*** The new built-in command `clear' can scroll window contents out of sight.
+
+** Browse-url
+
+*** Support for the Conkeror web browser.
+
+---
+*** Support for several ancient browsers is now officially obsolete.
+
+++
** tar-mode: new `tar-new-entry' command, allowing for new members to
be added to the archive.
+** Autorevert: dired buffers are also auto-reverted via file
+notifications, if Emacs is compiled with file notification support.
+
** Obsolete packages
---
\f
* Incompatible Lisp Changes in Emacs 25.1
+** Comint, term, and compile do not set the EMACS env var any more.
+Use the INSIDE_EMACS environment variable instead.
+
+** `save-excursion' does not save&restore the mark any more.
+
+** read-buffer-function can now be called with a 4th argument (`predicate').
+
** completion-table-dynamic stays in the minibuffer.
If you want the old behavior of calling the function in the buffer
from which the minibuffer was entered, call it with the new argument
** `cl-the' now asserts that its argument is of the given type.
+** `process-running-child-p` may now return a numeric process
+group ID instead of `t'.
+
+++
** Mouse click events on mode line or header line no longer include
any reference to a buffer position. The 6th member of the mouse
denied" instead of "permission denied". The old behavior was problematic
in languages like German where downcasing rules depend on grammar.
++++
+** The character classes [:alpha:] and [:alnum:] in regular expressions
+now match multibyte characters using Unicode character properties.
+If you want the old behavior where they matched any character with
+word syntax, use `\sw' instead.
+
\f
* Lisp Changes in Emacs 25.1
+** New process type `pipe', which can be used in combination with the
+`:stderr' keyword of make-process to handle standard error output
+of subprocess.
+
+** New function `make-process' provides an alternative interface to
+`start-process'. It allows programs to set process parameters such as
+process filter, sentinel, etc., through keyword arguments (similar to
+`make-network-process').
+
+** `read-buffer' takes a new `predicate' argument.
+
+** Emacs Lisp now supports generators.
+
+** New finalizer facility for running code when objects
+ become unreachable.
+
+** lexical closures can use (:documentation <form>) to build their docstring.
+It should be placed right where the docstring would be, and <form> is then
+evaluated (and should return a string) when the closure is built.
+
** define-inline provides a new way to define inlinable functions.
** New function macroexpand-1 to perform a single step of macroexpansion.
** New function `set-binary-mode' allows to switch a standard stream
of the Emacs process to binary I/O mode.
+** Miscellaneous name change
+
+For consistency with the usual Emacs spelling, the Lisp variable
+`hfy-optimisations' has been renamed to `hfy-optimizations'.
+The old name should still work, as an obsolescent alias.
+
\f
* Changes in Frames and Windows Code in Emacs 25.1
or Windows Server 2003. The built binaries still run on all versions
of Windows starting with Windows 9X.
++++
+** Emacs running on MS-Windows now supports the daemon mode.
+
** OS X 10.5 or older is no longer supported.
** OS X on PowerPC is no longer supported.