emacs/etc, branch scratch/seccomp-helper-binary

; * etc/NEWS: Fix the wording of a recently added entry.

2021-04-10T18:17:09+00:00

Add support for --seccomp command-line option.

2021-04-10T16:47:26+00:00

When passing this option on GNU/Linux, Emacs installs a Secure
Computing kernel system call filter.  See Bug#45198.

* configure.ac: Check for seccomp header.

* src/emacs.c (usage_message): Document --seccomp option.
(emacs_seccomp): New wrapper for 'seccomp' syscall.
(load_seccomp, maybe_load_seccomp): New helper functions.
(main): Potentially load seccomp filters during startup.
(standard_args): Add --seccomp option.

* lisp/startup.el (command-line): Detect and ignore --seccomp option.

* test/src/emacs-tests.el (emacs-tests/seccomp/absent-file)
(emacs-tests/seccomp/empty-file)
(emacs-tests/seccomp/file-too-large)
(emacs-tests/seccomp/invalid-file-size): New unit tests.
(emacs-tests--with-temp-file): New helper macro.

* etc/NEWS: Document new --seccomp option.

Edebug: Disable backtracking when hitting a &define keyword.

2021-04-10T16:19:49+00:00

Edebug doesn't deal well with backtracking out of definitions, see
Bug#41988.  Rather than trying to support this rare situation (e.g. by
implementing a multipass parser), prevent it by adding an implicit
gate.

* lisp/emacs-lisp/edebug.el (edebug--match-&-spec-op): Disable
backtracking when hitting a &define keyword.

* test/lisp/emacs-lisp/edebug-tests.el
(edebug-tests-duplicate-&define): New unit test.
(edebug-tests--duplicate-&define): New helper macro.

* doc/lispref/edebug.texi (Backtracking): Mention &define in the list
of constructs that disable backtracking.

* etc/NEWS: Document new behavior.

Revert "Load all generic-x.el modes unconditionally"

2021-04-08T23:43:10+00:00

This reverts commit 0161c9df6edc02db6bd8871b00df522dd0699157.

User option to move to another match when changing direction in isearch.

2021-04-08T19:04:08+00:00

* lisp/isearch.el (isearch-direction-change-changes-match):
New user option (bug#47599).
(isearch-repeat): Use the new option.
(isearch-repeat-forward, isearch-repeat-backward): Adapt to the
new option.

* etc/NEWS: Mention the new user option.

* doc/emacs/search.texi: Document the new user option.

* lisp/isearch.el (isearch-wrap-pause): New defcustom (bug#47599).

2021-04-06T19:15:30+00:00

(isearch-repeat): Use it.
(isearch-search): Don't ding when isearch-wrap-pause is no-ding.

* lisp/repeat.el (repeat-keep-prefix): New defcustom.

2021-04-05T21:02:43+00:00

* lisp/repeat.el (repeat-map): New autoloaded global variable.
(repeat-post-hook): Use 'repeat-map' when non-nil
and reset it to nil afterwards.
(repeat-post-hook): Keep the current prefix when
'repeat-keep-prefix' is non-nil.

* lisp/window.el (other-window-repeat-map): Add "O" that sets
'repeat-map' to 'other-window-repeat-map' before calling
'(other-window -1)'.

https://lists.gnu.org/archive/html/emacs-devel/2021-03/msg01387.html

* etc/NEWS: Add entry for new SVG icons in customize.

2021-04-05T09:14:34+00:00

Work around librsvg bug (bug#47074)

2021-04-04T13:26:07+00:00

Librsvg <= 2.40 has restrictions on how certain numbers can be run
together in path elements which do not match the SVG spec.

* etc/images/checkbox-mixed.svg:
* etc/images/checked.svg:
* etc/images/radio-checked.svg:
* etc/images/unchecked.svg: Separate problem numbers.
* etc/images/radio-mixed.svg: Separate problem numbers and color and
font-weight data.

Make new SVG widgets match character height (bug#47074)

2021-04-03T22:23:54+00:00

* etc/images/checkbox-mixed.svg:
* etc/images/checked.svg:
* etc/images/radio-checked.svg:
* etc/images/radio-mixed.svg:
* etc/images/radio.svg:
* etc/images/unchecked.svg: Use viewBox and set height to 1em.