* mpw-make.in (VERSION): Update to 4.12.3.

	* mpw-make.in (VERSION): Update to 4.12.3.
	(SiowGDB): New target, GDB using SIOW library.
	(init-new.c): New target, attempt to generate init.c from sources.
	(main.c.o, top.c.o): Put each in its own segment.
	* main.c (main) [MPW]: Always call mac_init.
	* utils.c (query) [MPW]: Always return "yes" if in MacGDB, output
	an extra newline otherwise.
	* mac-xdep.c: More comments in various places, remove junk.
	(mac_init): Add tests for MPW and SIOW.
	(use_wne, has_color_qd): Renamed.
	(use_color_qd): New variable.
	(grow_window): Only do console resizing to console window,
	call resize_console_window.
	(zoom_window): Call resize_console_window.
	(resize_console_window, scroll_text): New functions.
	(adjust_console_sizes): Always align viewrect to even multiples of
	text lines.
	(adjust_console_text): Always scroll by whole lines.
	(hacked_vfprintf, hacked_puts, hacked_fputc, hacked_putc): Force a
	recalculation of scroll positions if a newline was output.
	(hacked_fflush): Similarly, for flushing.
	(hacked_fgetc): New function, aborts if called in MacGDB.
	* ser-mac.c (mac_readchar): Rename starttime to start_time,
	remove debugging printf.
	(mac_write): Sleep on first 4 writes.
	(sec_sleep): New function, works like standard sleep.
	* macgdb.r: Adjust positioning and contents of About box.
	Set minimum size to 2000K, preferred size to 5000K.
	* config/m68k/xm-mpw.h (fgetc): Define as a macro.