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Here, we use the generic window-system configuration system we just
implemented to support the w32 window-system in the mainline build
under Cygwin.  (Previously, the w32 window system could only be
compiled as part of the NT-native Emacs build process.)

The changes in this patch need to be applied atomically in order to
avoid breaking Emacs.  The changes include:

  - Changes throughout the Lisp and C code to not assume that
      NT Emacs and the w32 window system are synonymous.

  - Wiring up the regular select(2) event loop to Windows messages

  - Cleaning up the w32 drag-and-drop receiving code.

  - Exposing Cygwin path conversion functions to elisp.

  - Unicode file dialog support when compiling for Cygwin.

  - Splitting the w32 term lisp initialization code into code
    applicable to any w32 window-system and code specific to
    system-type windows-nt.

  - Integrating the old and new w32 code into the build system.

* frame.h: Add missing prototype for x_wm_set_size_hint.

* gtkutil.h: Remove prototype for x_wm_set_size_hint.

remote definition of `default-directory', ensure we can connect.

http://lists.gnu.org/archive/html/emacs-devel/2012-09/msg00008.html

* lisp/isearch.el (search-whitespace-regexp): Doc fix.
Remove cons cell customization.
(isearch-mode-map): Bind "\M-s " to isearch-toggle-lax-whitespace.
(isearch-lax-whitespace, isearch-regexp-lax-whitespace):
New variables.
(isearch-forward, isearch-forward-regexp): Doc fix.
(isearch-toggle-lax-whitespace): New command.
(search-forward-lax-whitespace, search-backward-lax-whitespace)
(re-search-forward-lax-whitespace)
(re-search-backward-lax-whitespace): New functions.
(isearch-whitespace-regexp): Remove function.
(isearch-query-replace): Let-bind replace-search-function and
replace-re-search-function.
(isearch-occur): Let-bind search-spaces-regexp according to the
value of isearch-lax-whitespace and isearch-regexp-lax-whitespace.
(isearch-quote-char): Check isearch-regexp-lax-whitespace in the
condition for C-q SPC.
(isearch-search-fun-default): Use new functions mentioned above.
(isearch-search-forward, isearch-search-backward): Remove functions.
(isearch-search): Don't let-bind search-spaces-regexp.
(isearch-lazy-highlight-space-regexp): Remove variable.
(isearch-lazy-highlight-lax-whitespace)
(isearch-lazy-highlight-regexp-lax-whitespace): New variables.
(isearch-lazy-highlight-new-loop): Use them.
(isearch-lazy-highlight-search): Don't let-bind search-spaces-regexp.

* doc.c (read_bytecode_char, get_doc_string, reread_doc_file)
(Fdocumentation, Fdocumentation_property, Fsnarf_documentation)
(Fsubstitute_command_keys):
* editfns.c (region_limit, find_field, Fconstrain_to_field)
(save_excursion_save, save_excursion_restore)
(disassemble_lisp_time, decode_time_components, emacs_nmemftime)
(format_time_string, general_insert_function)
(make_buffer_string, make_buffer_string_both)
(Fsubst_char_in_region, Ftranslate_region_internal, Fformat):
* insdel.c (check_markers, gap_left, adjust_markers_for_insert)
(copy_text, insert_1, insert_1_both, insert_from_string)
(insert_from_string_before_markers, insert_from_string_1)
(insert_from_buffer, insert_from_buffer_1, replace_range)
(replace_range_2, del_range_1, del_range_byte, del_range_both)
(del_range_2, modify_region):
* intervals.c (intervals_equal, balance_possible_root_interval)
(adjust_intervals_for_insertion, merge_properties_sticky)
(graft_intervals_into_buffer, lookup_char_property)
(adjust_for_invis_intang, set_point_both)
(get_property_and_range, compare_string_intervals)
(set_intervals_multibyte_1, set_intervals_multibyte):
* keyboard.c (decode_timer):
Use bool for boolean.
* intervals.h, lisp.h, systime.h: Reflect above API changes.
* editfns.c (struct info): Use 1-bit unsigned bitfields for booleans.

* windows.texi (Window Configurations): Recommend against using
save-window-excursion.

* control.texi (Catch and Throw):
* positions.texi (Excursions): Don't mention it.

Fixes: debbugs:12075

Fixes: debbugs:11758

Fixes: debbugs:11616

(CCL_H, W32FONT_H): New macros.
(ATIMER_H, FONT_H, $(BLD)/alloc.$(O), $(BLD)/callproc.$(O))
($(BLD)/editfns.$(O), $(BLD)/ccl.$(O), $(BLD)/chartab.$(O))
($(BLD)/coding.$(O), $(BLD)/sysdep.$(O), $(BLD)/fontset.$(O))
($(BLD)/sysdep.$(O), $(BLD)/w32fns.$(O), $(BLD)/keyboard.$(O))
($(BLD)/w32term.$(O), $(BLD)/w32menu.$(O), $(BLD)/process.$(O))
($(BLD)/w32font.$(O), $(BLD)/w32uniscribe.$(O)): Update.

(HAVE_EXECINFO_H, TERM_HEADER): New macros.

Fixes: debbugs:12283

* lisp/term.el: (term-mode-map): Use easymenu for In/Out, Complete menus.
(term-pager-break-map): Initialize in the defvar.
(term-terminal-menu, term-signals-menu): Define with easymenu.
(term-terminal-menu): Also show it in line-mode. 
(term-pager-menu): New, extracted from term-process-pager.
(term-mode, term-char-mode, term-process-pager): Use easymenu-add.
(term-update-mode-line): Propertize line/char and page items.
(term-process-pager): Move keymap initialization elsewhere.

Fixes: debbugs:11957

This ports to glibc 2.15 or later, when configured with
--enable-gcc-warnings.  See Eric Blake in
<http://lists.gnu.org/archive/html/bug-grep/2012-09/msg00000.html>.

* window.el (switch-to-prev-buffer): Handle additional values of
BURY-OR-KILL argument.  Don't switch in minibuffer window.
(switch-to-next-buffer): Don't switch in minibuffer window.
(quit-restore-window): New function based on quit-window.
Handle additional values of former KILL argument.
(quit-window): Call quit-restore-window with appropriate
interpretation of KILL argument.
(display-buffer-below-selected): New buffer display action
function.

 src/w32uniscribe.c (uniscribe_shape): Handle correctly the case of
 more than one grapheme cluster passed to the shaper: compute the
 offset adjustment values separately for each cluster.

 src/image.c: Restore mistakenly removed inclusion of w32.h.  Without
 it, GCC doesn't see prototypes of w32_delayed_load, and complains
 about implicit conversions from integer to pointer.

This change streamlines the window system selection code in
configure.in and moves many common function declarations from
window-specific headers to frame.h.  It introduces a new TERM_HEADER
macro in config.h: we set this macro to the right header to use for
the window system for which we're compiling Emacs and have source
files include it indirectly.  This way, we don't have to teach every
file about every window system.

Fixes: debbugs:12254

This fixes a bug on old systems that do not have the 'random' function.

* doc/lispref/numbers.texi (Random Numbers): Document new behavior of
the calls (random) and (random STRING).
* etc/NEWS: Document new behavior of (random), (random "string").
* lisp/play/5x5.el, lisp/play/animate.el, lisp/play/cookie1.el:
* lisp/play/dissociate.el, lisp/play/doctor.el, lisp/play/dunnet.el:
* lisp/play/gomoku.el, lisp/play/landmark.el, lisp/play/mpuz.el:
* lisp/play/tetris.el, lisp/play/zone.el:
* lisp/calc/calc-comb.el (math-init-random-base):
* lisp/play/blackbox.el (bb-init-board):
* lisp/play/life.el (life):
* lisp/server.el (server-use-tcp):
* lisp/type-break.el (type-break):
Remove unnecessary call to (random t).
* lisp/net/sasl.el (sasl-unique-id-function):
Change (random t) to (random), now that the latter is more random.
* lisp/play/life.el (life-initialized): Remove no-longer-needed var.
* lisp/gnus/gnus-sync.el (gnus-sync-lesync-setup):
* lisp/gnus/message.el (message-canlock-generate, message-unique-id):
Change (random t) to (random), now that the latter is more random.
* lisp/org/org-id.el (org-id-uuid):
Change (random t) to (random), now that the latter is more random.
* src/emacs.c (main): Call init_random.
* src/fns.c (Frandom): Set the seed from a string argument, if given.
Remove long-obsolete Gentzel cruft.
* src/lisp.h, src/sysdep.c (seed_random): Now takes address and size, not long.
(init_random): New function.

* etags.c (consider_token): Always zero-terminate token buffer.

* window.el (switch-to-prev-buffer, switch-to-next-buffer):
Consider frame's buffer predicate when choosing the buffer.
(Bug#12081)

  `eshell-external-command'.

* lisp.h (mark_ttys): Remove prototype.
* alloc.c (Fgarbage_collect): Remove redundant (and the only) call
to mark_ttys because all possible values of 'top_frame' slot are
the frames which are reachable from Vframe_list.
* term.c (mark_ttys): Remove.
(init_tty): Safely initialize 'top_frame' slot with Qnil.

* frame.h (struct frame): Change type of 'display_preempted',
'visible', 'iconified', 'has_minibuffer', 'wants_modeline',
'auto_raise', 'auto_lower', 'no_split', 'explicit_name',
'window_sizes_changed', 'mouse_moved' and 'pointer_invisible'
bitfields from unsigned char to unsigned.

* xterm.h (struct x_output): Remove unused field 'needs_exposure'.
* w32term.h (struct w32_output): Likewise.

does not become zero.

Fixes: debbugs:12234

for GCC 4.7.1 x86-64.