start-sanitize-gdbtk

* Makefile.in (gdbtk.o):  Use X11_CFLAGS to provide alternate
	locations (per-host) for X11 include files.
	* config/pa/hppahpux.mh (XM_CLIBS):  Add -L/usr/lib/X11R5 to force
	the use of R5 libs.  (X11_CFLAGS):  Add this to indicate the locs
	of the R5 include files.
end-sanitize-gdbtk
	* monitor.c monitor.h remote-est.c rom68k-rom.c:  Add start of
	support for interrupting target.
	* monitor.c (monitor_open):  Send stop command before doing
	anything else.
	* (monitor_load_srec):  Fix record size calculation to prevent end
	of segment from getting trashed.
	* rom68k-rom.c:  Update to latest version of struct monitor_ops.
	* config/sparc/tm-sparc.h (FIX_CALL_DUMMY):  Fix byte-order
	problems.  Makes DOS hosted function calling work.
	* sparclite/crt0.s:  Define _start to make COFF happy.
	* testsuite/config/rom68k.exp (gdb_target_rom68k):  Use
	$targetname, $serialport and $baud instead of hardwired variables.
	* testsuite/gdb.base/{sigall.exp signals.exp}:  Skip these if the
	target doesn't support signals.

gdb/remote-est.c

@@ -104,6 +104,7 @@ static struct monitor_ops est_cmds =
   est_inits,			/* Init strings */
   "go\r",			/* continue command */
   "sidr\r",			/* single step */
+  "\003",			/* ^C interrupts the program */
   "sb %x\r",			/* set a breakpoint */
   "rb %x\r",			/* clear a breakpoint */
   "rb\r",			/* clear all breakpoints */