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* data.c (circular_list_error): Remove.

(last_point_position_window): Remove decls.
* keyboard.c: Make these variables static.

decls.
* coding.c (Vsjis_coding_system, Vbig5_coding_system):
(iso_code_class, detect_coding, code_convert_region): Now static.
(encode_coding_gap): Remove; unused.

* charset.c (charset_iso_8859_1, charset_emacs, map_charset_for_dump):
Now static.

* ccl.c (Vccl_program_table): Now static.
(check_ccl_update): Remove; unused.

* category.h: ... from here.
* category.c (check_category_table, set_category_set): Now static.

* lisp.h: Remove these decls.

so that it's not optimized away.
(bidi_ignore_explicit_marks_for_paragraph_level): Likewise.
* dispextern.h (bidi_dump_cached_states): Remove, since it's
exported only to the debugger.

* atimer.h (run_all_atimers): Removed; not exported.

* font.c (copy_font_spec): Rename from Fcopy_font_spec, since it
was inaccessible from Lisp.
(merge_font_spec): Likewise, renaming from Fmerge_font_spec.
* font.c, font.h, fontset.c, xfaces.c, xfont.c: Change all uses.

* lisp.h (suppress_checking, die): Declare only if ENABLE_CHECKING
is defined.
(suppress_checking): Add EXTERNALLY_VISIBLE attribute, so that
it's not optimized away by whole-program optimization.
(message_enable_multibyte, free_misc): Remove.
(catchlist, handlerlist, mark_backtrace):
Declare only if BYTE_MARK_STACK.
(mark_byte_stack): Likewise, fixing a ifdef-vs-if typo.
* alloc.c (pure): Export only if VIRT_ADDR_VARIES is defined.
(message_enable_multibyte): Remove decl.
(free_misc, interval_free_list, float_block, float_block_index):
(n_float_blocks, float_free_list, cons_block, cons_block_index):
(cons_free_list, last_marked_index):
Now static.
(suppress_checking, die): Define only if ENABLE_CHECKING is defined.
* eval.c (catchlist, handlerlist): Export only if BYTE_MARK_STACK.
(mark_backtrace): Define only if BYTE_MARK_STACK.
* xdisp.c (message_enable_multibyte): Now static.

This makes it easier for human readers (and static analyzers)
to see whether these variables are used from other modules.
* alloc.c, buffer.c, bytecode.c, callint.c, casetab.c, category.c:
* ccl.c, character.c, charset.c, cmds.c, coding.c, composite.c:
* data.c, dbusbind.c, dired.c, editfns.c, eval.c, fileio.c, fns.c:
* font.c, frame.c, fringe.c, ftfont.c, image.c, keyboard.c, keymap.c:
* lread.c, macros.c, minibuf.c, print.c, process.c, search.c:
* sound.c, syntax.c, textprop.c, window.c, xdisp.c, xfaces.c, xfns.c:
* xmenu.c, xselect.c:
Declare Q* vars static if they are not used in other modules.
* ccl.h, character.h, charset.h, coding.h, composite.h, font.h:
* frame.h, intervals.h, keyboard.h, lisp.h, process.h, syntax.h:
Remove decls of unexported vars.
* keyboard.h (EVENT_HEAD_UNMODIFIED): Remove now-unused macro.

This makes it easier for human readers (and static analyzers)
to see whether these functions can be called from other modules.
DEFUN now defines a static function.  To make the function external
so that it can be used in other C modules, use the new macro DEFUE.
* lisp.h (DEFINE_FUNC): New macro, with the old contents of DEFUN.
(DEFUN): Rewrite in terms of DEFINE_FUNC.  It now generates a
static function definition.  Use DEFUE if you want an extern one.
(DEFUE, INFUN): New macros.
(Funibyte_char_to_multibyte, Fsyntax_table_p, Finit_image_library):
(Feval_region, Fbacktrace, Ffetch_bytecode, Fswitch_to_buffer):
(Ffile_executable_p, Fmake_symbolic_link, Fcommand_execute):
(Fget_process, Fdocumentation_property, Fbyte_code, Ffile_attributes):
Remove decls, since these functions are now static.
(Funintern, Fget_internal_run_time): New decls, since these functions
were already external.
* alloc.c, buffer.c, callint.c, callproc.c, casefiddle.c, casetab.c:
* ccl.c, character.c, chartab.c, cmds.c, coding.c, data.c, dispnew.c:
* doc.c, editfns.c, emacs.c, eval.c, fileio.c, filelock.c, floatfns.c:
* fns.c, font.c, fontset.c, frame.c, image.c, indent.c:
* keyboard.c, keymap.c, lread.c:
* macros.c, marker.c, menu.c, minibuf.c, print.c, process.c, search.c:
* syntax.c, term.c, terminal.c, textprop.c, undo.c:
* window.c, xdisp.c, xfaces.c, xfns.c, xmenu.c, xsettings.c:
Mark functions with DEFUE instead of DEFUN,
if they are used in other modules.
* buffer.c (Fset_buffer_major_mode, Fdelete_overlay): New forward
decls for now-static functions.
* buffer.h (Fdelete_overlay): Remove decl.
* callproc.c (Fgetenv_internal): Mark as internal.
* composite.c (Fremove_list_of_text_properties): Remove decl.
(Fcomposition_get_gstring): New forward static decl.
* composite.h (Fcomposite_get_gstring): Remove decl.
* dired.c (Ffile_attributes): New forward static decl.
* doc.c (Fdocumntation_property): New forward static decl.
* eval.c (Ffetch_bytecode): New forward static decl.
(Funintern): Remove extern decl; now in .h file where it belongs.
* fileio.c (Fmake_symbolic_link): New forward static decl.
* image.c (Finit_image_library): New forward static decl.
* insdel.c (Fcombine_after_change_execute): Make forward decl static.
* intervals.h (Fprevious_property_change):
(Fremove_list_of_text_properties): Remove decls.
* keyboard.c (Fthis_command_keys): Remove decl.
(Fcommand_execute): New forward static decl.
* keymap.c (Flookup_key): New forward static decl.
(Fcopy_keymap): Now static.
* keymap.h (Flookup_key): Remove decl.
* process.c (Fget_process): New forward static decl.
(Fprocess_datagram_address): Mark as internal.
* syntax.c (Fsyntax_table_p): New forward static decl.
(skip_chars): Remove duplicate decl.
* textprop.c (Fprevious_property_change): New forward static decl.
* window.c (Fset_window_fringes, Fset_window_scroll_bars):
Now internal.
(Fset_window_margins, Fset_window_vscroll): New forward static decls.
* window.h (Fset_window_vscroll, Fset_window_margins): Remove decls.

2011-04-10  Paul Eggert  <eggert@cs.ucla.edu>

* gnutls.c (emacs_gnutls_read): Adjust signature to be more read-like:
return ssize_t not "int", and use size_t as the buffer length.
(emacs_gnutls_write): Likewise, and make the buffer pointer "const".
* gnutls.h: Update declarations.
* process.c (read_process_output): Use ssize_t, to match.
(send_process): Likewise.

See <http://debbugs.gnu.org/cgi/bugreport.cgi?bug=8435#26>.

This also lets GCC 4.6.0 generate slightly better loop code.

* lisp/image-mode.el (image-toggle-display-image): Signal an error if
not in Image mode.
(image-transform-mode, image-transform-resize)
(image-transform-set-rotation): Doc fix.
(image-transform-set-resize): Deleted.
(image-transform-set-scale, image-transform-fit-to-height)
(image-transform-fit-to-width): Handle image-toggle-display-image
and image-transform-resize directly.

* src/image.c (Fimagemagick_types): Doc fix, and comment cleanup.

(Fcall_interactively): Count the number of arguments produced,
not the number of arguments given.  This is simpler and lets GCC
4.6.0 generate slightly better code.

The previous code passed unsigned char * to a functions like
strlen and xstrcasecmp that expect char *, which does not
conform to the C standard.
(get_adstyle_property, ftfont_pattern_entity): Use FcChar8 for
arguments to FcPatternGetString, and explicitly cast FcChar8 * to
char * when the C standard requires it.