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exists for the requested type, just return nil.

	isearch-whitespace-chars matches any string of whitespace.

	(LD_SWITCH_SYSTEM): Delete the -L option, leave just -R.

	(getopt.o, getopt1.c): Use ${srcdir} as appropriate.

	INSTALLABLE_SCRIPTS.  Make the renaming loop use INSTALLABLES and
	INSTALLABLE_SCRIPTS, instead of writing the programs out.

	subdirectory makes.

	we have those structures, but *don't* define them if we have
	TERMIOS, whose functions take care of those parameters; that
	screws up AIX.
	(struct emacs_tty): Test those symbols, instead of the ioctl
	commands.
	* sysdep.c (emacs_get_tty, emacs_set_tty, new_ltchars, new_tchars,
	init_sys_modes): Same.

	we're using GCC - that's an XLC switch.

	* s/aix3-2.h (LIBS_SYSTEM): Put -LIM -Liconv here.

	configure will have something to edit.

before copying it to anything else.

(get_system_name) [HAVE_SOCKETS]: Use gethostbyname.

	LD_SWITCH_SYSTEM, OLDXMENU_OPTIONS): Add X11R5 directories to the
	search paths in these lists; they shouldn't do any harm if they
	don't have X11R5.

	* make-dist: Check for .elc files with no corresponding .el file.

(syms_of_xfns): Install them only if X11.

	* configure.in: Use it, tentatively.

(gnus-local-domain): Likewise.

	frame's face.
	(set-face-font): Only use x-resolve-font-name if FONT is a string.
	Copying a faces shouldn't resolve the font.

Be smart about window configurations--when and whether to restore.