gdb/

gdb/
	* Makefile.in (gdbtypes_h, gdbtypes.o, utils.o): Update.
	* defs.h (hashtab_obstack_allocate, dummy_obstack_deallocate): Add
	prototypes.
	* dwarf2read.c (read_subroutine_type): Use TYPE_ZALLOC.
	(hashtab_obstack_allocate, dummy_obstack_deallocate): Moved to...
	* utils.c (hashtab_obstack_allocate, dummy_obstack_deallocate):
	...here.
	* gdbtypes.c: Include "hashtab.h".
	(build_gdbtypes): Remove extra prototype.
	(struct type_pair, type_pair_hash, type_pair_eq)
	(create_copied_types_hash, copy_type_recursive): New.
	* gdbtypes.h: Include "hashtab.h".
	(TYPE_ZALLOC): New.
	(create_copied_types_hash, copy_type_recursive): New prototypes.
	* objfiles.c (free_objfile): Call preserve_values.
	* symfile.c (reread_symbols): Likewise.
	(clear_symtab_users): Remove calls to clear_value_history and
	clear_internalvars.
	* value.c (clear_value_history, clear_internalvars): Removed.
	(preserve_one_value, preserve_values): New functions.
	* value.h (clear_value_history, clear_internalvars): Removed.
	(preserve_values): New prototype.

	* tracepoint.c (_initialize_tracepoint): Do not initialize convenience
	variables here.
gdb/doc/
	* gdb.texinfo (Files): Remove obsolete bits from the description
	of "symbol-file".