The user can now have infinitely many Date headers.
This change should be pretty much backwards-compatible, even though
many customisation variables have been removed.
gnus.texi (Customizing Articles): Document the new way of customizing
the date headers(s).
* configure: Regenerate from the following.
2011-01-30 Paul Eggert <eggert@cs.ucla.edu>
mktime: clarify long_int width checking
* lib/mktime.c (long_int_is_wide_enough): Move this assertion to
the top level, to make it clearer that the assumption about
long_int width is being checked. See
<http://lists.gnu.org/archive/html/bug-gnulib/2011-01/msg00554.html>.
2011-01-29 Paul Eggert <eggert@cs.ucla.edu>
TYPE_MAXIMUM: avoid theoretically undefined behavior
* lib/intprops.h (TYPE_MINIMUM, TYPE_MAXIMUM): Do not shift a
negative number, which the C Standard says has undefined behavior.
In practice this is not a problem, but might as well do it by the book.
Reported by Rich Felker and Eric Blake; see
<http://lists.gnu.org/archive/html/bug-gnulib/2011-01/msg00493.html>.
* m4/mktime.m4 (AC_FUNC_MKTIME): Likewise.
* lib/mktime.c (TYPE_MAXIMUM): Redo slightly to match the others.
mktime: #undef mktime before #defining it
* lib/mktime.c (mktime) [DEBUG]: #undef mktime before #defining it.
mktime: systematically normalize tm_isdst comparisons
* lib/mktime.c (isdst_differ): New function.
(__mktime_internal): Use it systematically for all isdst comparisons.
This completes the fix for libc BZ #6723, and removes the need for
normalizing tm_isdst. See
<http://sourceware.org/bugzilla/show_bug.cgi?id=6723>
(not_equal_tm) [DEBUG]: Use isdst_differ here, too.
mktime: fix some integer overflow issues and sidestep the rest
This was prompted by a bug report by Benjamin Lindner for MinGW
<http://lists.gnu.org/archive/html/bug-gnulib/2011-01/msg00472.html>.
His bug is due to signed integer overflow (0 - INT_MIN), and I
I scanned through mktime.c looking for other integer overflow
problems, fixing all the bugs I found.
Although the C Standard says the resulting code is still not safe
in the presence of integer overflow, in practice it should be good
enough for all real-world two's-complement implementations, except
for debugging environments that deliberately trap on integer
overflow (e.g., gcc -ftrapv).
* lib/mktime.c (WRAPV): New macro.
(SHR): Also check that long_int and time_t shift right in the
usual way, before using the fast-but-unportable method.
(TYPE_ONES_COMPLEMENT, TYPE_SIGNED_MAGNITUDE): Remove, no longer
used. The code already assumed two's complement, so there's
no need to test for alternatives. All uses removed.
(TYPE_MAXIMUM): Don't rely here on overflow behavior not defined by
the C standard. Problem reported by Rich Felker in
<http://lists.gnu.org/archive/html/bug-gnulib/2011-01/msg00488.html>.
(twos_complement_arithmetic): Also check long_int and time_t.
(time_t_avg, time_t_add_ok, time_t_int_add_ok): New functions.
(guess_time_tm, ranged_convert, __mktime_internal): Use them.
(__mktime_internal): Avoid integer overflow with unary subtraction
in two instances where -1 - X is an adequate replacement for -X,
since the calculations are approximate.
2011-01-29 Eric Blake <eblake@redhat.com>
mktime: avoid infinite loop
* m4/mktime.m4 (AC_FUNC_MKTIME): Avoid overflow on possibly-signed
type; behavior is still undefined but portable to all known targets.
Reported by Rich Felker.
2011-01-28 Paul Eggert <eggert@cs.ucla.edu>
mktime: avoid problems on NetBSD 5 / i386
* lib/mktime.c (long_int): New type. This works around a problem
on NetBSD 5 / i386, where 'long int' and 'int' are both 32 bits
but time_t is 64 bits, and where I expect the existing code is
wrong in some cases.
(leapyear, ydhms_diff, guess_time_tm, __mktime_internal): Use it.
(ydhms_diff): Bring back the compile-time check for wide-enough
year and yday.
mktime: fix misspelling in comment
* lib/mktime.c (__mktime_internal): Fix misspelling in comment.
This merges all recent glibc changes of importance.
2011-01-28 Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
move-if-change: cope with concurrent mv of identical file.
* move-if-change (CMPPROG): Accept environment
variable as an override for `cmp'.
(usage): Document CMPPROG.
Adjust comparison to drop stdout. Cope with failure of mv if
the target file exists and is identical to the source, for
parallel builds.
Report from H.J. Lu against binutils in PR binutils/12283.
* mail/emacsbug.el (report-emacs-bug-insert-to-mailer): Check
report-emacs-bug-can-use-osx-open and use that if t.
(report-emacs-bug-can-use-osx-open): New function.
(report-emacs-bug): Rename can-xdg-email to can-insert-mail.
Check report-emacs-bug-can-use-osx-open also for can-insert-mail.
* image.c (fn_png_longjmp, fn_png_set_longjmp_fn): New png
function definitions for compiling with libpng-1.5.
(PNG_LONGJMP, PNG_JMPBUF): New macros for libpng-1.5.
(my_png_error, png_load): Use them. Suggested by Thomas Klausner.
* vc/vc-dispatcher.el (vc-set-async-update): New function for
updating Dired or VC-dir buffers after async command completes.
* vc/vc-bzr.el (vc-bzr-async-command): Return the process buffer.
(vc-bzr-pull, vc-bzr-merge-branch): Use vc-set-async-update.
* vc/vc-git.el (vc-git-merge-branch): Add FETCH_HEAD to branch
completions if it exists. Use vc-set-async-update.
(vc-git-pull): Use vc-set-async-update.
* vc/vc-hg.el (vc-hg-pull): Fix default-contents arg to
read-shell-command. Use vc-set-async-update.
(vc-hg-merge-branch): Use vc-set-async-update.
* nsselect.m (ns_string_from_pasteboard): Get length of string
and use make_string instead of build_string.
(ns_string_to_pasteboard_internal): Use initWithBytesNoCopy
instead of stringWithUTF8String (Bug#7934).
(compilation--previous-directory): New fun.
(compilation--previous-directory-cache): New var.
(compilation--remove-properties): Flush it.
(compilation-directory-properties, compilation-error-properties):
Use the new fun to speed up looking for the current directory.
* lisp/vc/vc.el (vc-pull): Make vc-update an alias for this, instead of
the other way around.
* lisp/vc/vc-git.el (vc-git-branches, vc-git-pull)
(vc-git-merge-branch): New functions.
(vc-git-history): New var.
* lisp/vc/vc-hg.el (vc-hg-history): New var.
(vc-hg-pull): Perform default pull if called via Lisp by vc-pull.
(vc-hg-merge-branch): New function.
* vc/vc-dispatcher.el (vc-do-async-command): New function.
* vc/vc-bzr.el (vc-bzr-async-command): Convert into a wrapper for
vc-do-async-command.
* vc/vc-bzr.el (vc-bzr-pull, vc-bzr-merge-branch): Callers changed.
gnus-win.el: Remove dead function gnus-window-configuration-element.
(gnus-all-windows-visible-p): Remove old compatibility code.
(gnus-window-top-edge): Add docstring.
gnus-sum.el (gnus-select-newsgroup): Don't try to alter the active data if the group is unactivated.
(compilation-error-regexp-alist-alist): Change handling of makepp
so it preserves the warning/error distinction on subsequent files.
Simplify various rules.
(compilation-directory-properties): Use font-lock-face.
Add a compilation-message property.
(compilation-internal-error-properties): Use font-lock-face.
Don't set the compilation-debug property here.
(compilation--put-prop, compilation--remove-properties)
(compilation--parse-region, compilation--ensure-parse)
(compilation--ensure-parse): New functions.
(compilation-parse-errors): New function, largely inspired of
compilation-mode-font-lock-keywords. Set compilation-debug here.
(compilation--parsed): New var.
(compilation--flush-parse): Use compilation--ensure-parse.
(compilation-start): Don't call font-lock.
(compilation-turn-on-font-lock): Remove.
(compilation-setup): Don't set font-lock-extra-managed-props not change
other font-lock settings, other than keywords.
Don't activate font-lock-mode.
Set change-major-mode-hook and before-change-functions.
(compilation--unsetup): Remove properties and hooks.
(compilation-next-single-property-change): New function.
(compilation-next-error): Use it to parse when needed.
(compile-goto-error): Parse buffer as needed.
(compilation--compat-error-properties): Don't need a dummy `face'
property any more.
(compilation-process-setup-function): Fix docstring's false promises.
(compilation-error-regexp-alist-alist): Catch omake's continuous
recompilation message and avoid reuse of old markers.
(compilation-parse-errors-function): Declare obsolete.
(compilation-buffer-modtime): Remove.
(compilation--make-cdrloc, compilation--loc->col)
(compilation--loc->line, compilation--loc->file-struct)
(compilation--loc->marker, compilation--loc->visited)
(compilation--make-file-struct, compilation--file-struct->file-spec)
(compilation--file-struct->formats)
(compilation--file-struct->loc-tree): New macros. Use them.
(compilation--message): New defstruct. Use them.
(compilation-next-error-function): Don't mess with timestamps to try
and guess when to reparse.
* emacs-lisp/advice.el (ad-make-advised-docstring): Don't apply
highlighting to the "this function is advisted" message.
* help-mode.el (help-mode-finish): Apply highlighting here, to
avoid clobbering by substitute-command-keys (Bug#6304).
