* Makefile.in (DEMANGLER): Define and default to cplus-dem.

Allows selection of C++ demangler to be a configuration option
	until multiple demanglers are supported.
	* demangle.h:  New include file for extended demangler support.
	* breakpoint.c, gdbtypes.c, printcmd.c, stack.c, symtab.c,
	utils.c, valprint.c:  Include "demangle.h" and change all calls
	to cplus_demangle() or fputs_demangled() to use individual
	demangling options.
	* valprint.c (type_print_1):  Change options to cplus_demangle
	to print demangled function args.  Still broken, but now less so.
	* cplus-dem.c:  Include demangle.h, reorganize and update some
	comments to reflect reality.
	* cplus-dem.c (cplus_demangle, cplus_mangle_opname):  Change
	second arg from fixed integer to bit based multiple options.
	* cplus-dem.c (optable):  Reformat and replace ansi members with
	bit based options.
	* cplus-dem.c (do_type):  Fix bug with parsing missing return type.

gdb/demangle.h

@@ -0,0 +1,20 @@
+/* Demangler defs for GNU C++ style demangling.
+   Copyright 1992 Free Software Foundation, Inc.
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+
+#define DMGL_PARAMS	(1 << 0)	/* Include function args */
+#define DMGL_ANSI	(1 << 1)	/* Include const, volatile, etc */