* dwarf2read.c (struct dwarf2_cu): New type.

	* dwarf2read.c (struct dwarf2_cu): New type.

	(dwarf2_build_psymtabs_hard, psymtab_to_symtab_1): Create a
	dwarf2_cu structure to pass down.

	(scan_partial_symbols, add_partial_symbol, add_partial_namespace)
	(add_partial_enumeration, locate_pdi_sibling, process_die)
	(read_file_scope, read_func_scope)
	(read_lexical_block_scope, dwarf2_get_pc_bounds)
	(dwarf2_add_field, dwarf2_attach_fields_to_type)
	(dwarf2_add_member_fn, dwarf2_attach_fn_fields_to_type)
	(read_structure_scope, read_enumeration, read_array_type)
	(read_common_block, read_namespace, read_tag_pointer_type)
	(read_tag_ptr_to_member_type, read_tag_reference_type)
	(read_tag_const_type, read_tag_volatile_type, read_tag_string_type)
	(read_subroutine_type, read_typedef, read_base_type, read_comp_unit)
	(read_die_and_children, read_die_and_siblings, dwarf2_read_section)
	(dwarf2_read_abbrevs, dwarf2_lookup_abbrev, read_partial_die)
	(read_full_die. read_attribute_value, read_attribute)
	(read_address, dwarf_decode_line_header, dwarf_decode_lines)
	(var_decode_location, new_symbol, dwarf2_const_value, die_type)
	(die_containing_type, type_at_offset, tag_type_to_type)
	(read_type_die, dwarf_base_type, decode_locdesc, dwarf_decode_macros)
	(dwarf2_symbol_mark_computed): Accept and use a dwarf2_cu object.