(Finsert_file_contents): If we read 0 bytes from a special file,
unlock the visited file if we locked it.
(Fmake_symbolic_link, Frecent_auto_save_p): Doc fixes.
(Ffile_exists_p, Ffile_symlink_p): Doc fixes.
[!MAC_OSX] (target_ticks): Remove variable.
[!MAC_OSX] (check_alarm, pause, index): Remove functions.
[!MAC_OSX && __MRC__] (sys_strftime): Likewise.
[!MAC_OSX] (select): If fd 0 is not set in rfds and some input
event occurs before timeout, behave as if the function were
interrupted.
[!MAC_OSX] (sigblock, sigsetmask, alarm): Simulate SIGALRM
handling using Time Manager routines.
[!MAC_OSX] (mac_atimer_task, mac_atimer_qlink, signal_mask): New
variables.
[!MAC_OSX] (mac_atimer_handler, set_mac_atimer, remove_mac_atimer)
(setitimer): New functions.
Rename from get_control_part_bound. All callers changed.
(x_scroll_bar_clear): New function.
(x_clear_frame): Use it.
(XTset_vertical_scroll_bar): Don't call Draw1Control.
(x_scroll_bar_handle_click): Change type of second argument from
int to ControlPartCode.
(check_alarm): Remove declaration.
(XTread_Socket) [!TARGET_API_MAC_CARBON]: Don't call it.
(XTread_Socket): Use ControlPartCode instead of SInt16.
(MACOSX_MALLOC_MULT16): New define.
[MACOSX_MALLOC_MULT16] (ptr_in_unexec_regions): Determine whether
ptr is in unexec regions by checking it is multiple of 16.
(unexec_malloc_header_t): New typedef.
(unexec_malloc, unexec_realloc, unexec_free): Store and use
allocated size information in unexec_malloc_header.
(makefile-dependency-regex): Fix it to not make the colon in $(var:a=b) special.
(makefile-rule-action-regex): New regexp for highlighting embedded Shell strings.
(makefile-macroassign-regex): Handle != for highlighting as embedded Shell strings.
(makefile-var-use-regex): New const.
(makefile-statements, makefile-automake-statements)
(makefile-gmake-statements, makefile-makepp-statements)
(makefile-bsdmake-statements): New consts.
(makefile-make-font-lock-keywords): New function.
(makefile-automake-font-lock-keywords)
(makefile-gmake-font-lock-keywords)
(makefile-makepp-font-lock-keywords)
(makefile-bsdmake-font-lock-keywords): New consts.
(makefile-mode-map): Add switchers between the various submodes.
(makefile-mode): Document the availability of the variants.
(makefile-automake-mode, makefile-gmake-mode)
(makefile-makepp-mode, makefile-bsdmake-mode): New derived modes.
