This patch adds support for tracking local symbols during a full
incremental link and a subsequent incremental update. I extended the
per-input-file info area to store the symbol table index of the first
local and the count of local symbols for each input file. These
symbols are then copied to the output symbol table.

-cary


2011-03-30 Cary Coutant  <ccoutant@google.com>

	* gold/incremental-dump.cc (dump_incremental_inputs): Print local
	symbol info for each input file.
	* gold/incremental.cc
	(Output_section_incremental_inputs::set_final_data_size): Add local
	symbol info to input file entries in incremental info.
	(Output_section_incremental_inputs::write_info_blocks): Likewise.
	(Sized_incr_relobj::Sized_incr_relobj): Initialize new data members.
	(Sized_incr_relobj::do_add_symbols): Cosmetic change.
	(Sized_incr_relobj::do_count_local_symbols): Replace stub with
	implementation.
	(Sized_incr_relobj::do_finalize_local_symbols): Likewise.
	(Sized_incr_relobj::do_relocate): Write the local symbols.
	(Sized_incr_dynobj::do_add_symbols): Cosmetic change.
	* gold/incremental.h (Incremental_inputs_reader::get_symbol_offset):
	Adjust size of input file header.
	(Incremental_inputs_reader::get_local_symbol_offset): New function.
	(Incremental_inputs_reader::get_local_symbol_count): New function.
	(Incremental_inputs_reader::get_input_section): Adjust size of input
	file header.
	(Incremental_inputs_reader::get_global_symbol_reader): Likewise.
	(Sized_incr_relobj::This): New typedef.
	(Sized_incr_relobj::sym_size): New const data member.
	(Sized_incr_relobj::Local_symbol): New struct.
	(Sized_incr_relobj::do_output_local_symbol_count): New function.
	(Sized_incr_relobj::do_local_symbol_offset): New function.
	(Sized_incr_relobj::local_symbol_count_): New data member.
	(Sized_incr_relobj::output_local_dynsym_count_): New data member.
	(Sized_incr_relobj::local_symbol_index_): New data member.
	(Sized_incr_relobj::local_symbol_offset_): New data member.
	(Sized_incr_relobj::local_dynsym_offset_): New data member.
	(Sized_incr_relobj::local_symbols_): New data member.
	* gold/object.h (Relobj::output_local_symbol_count): New function.
	(Relobj::local_symbol_offset): New function.
	(Relobj::do_output_local_symbol_count): New function.
	(Relobj::do_local_symbol_offset): New function.
	(Sized_relobj::do_output_local_symbol_count): New function.
	(Sized_relobj::do_local_symbol_offset): New function.