* libelf.h (struct elf_link_hash_table): Add needed field. Remove

	* libelf.h (struct elf_link_hash_table): Add needed field.  Remove
	saw_needed field.
	* elfcode.h (elf_link_add_object_symbols): If elf_dt_needed_name
	is an empty string, don't make a DT_NEEDED entry in the output
	file.  Record all DT_NEEDED entries found in input dynamic
	objects.
	(elf_link_output_extsym): Don't check saw_needed when issuing
	warnings.
	* elf.c (_bfd_elf_link_hash_table_init): Initialize needed, not
	saw_needed.
	(bfd_elf_get_needed_list): New function.
	* bfd-in.h (struct bfd_elf_link_needed_list): Define.
	(bfd_elf_get_needed_list): Define.
	* bfd-in2.h: Rebuild.
PR 7083.