Pass -dumpbase and -dumpdir to gcc for LTO

gcc/

2010-01-03  H.J. Lu  <hongjiu.lu@intel.com>

	PR lto/41564
	* common.opt: Add dumpdir.

	* gcc.c (cc1_options): Add "-dumpbase %B" only if -dumpbase
	isn't specified.
	(option_map): Add --dumpdir.

	* gcc.h (DEFAULT_WORD_SWITCH_TAKES_ARG): Add dumpdir.

	* lto-wrapper.c (run_gcc): Add -dumpbase and -dumpdir for -o.

	* opts.c (decode_options): Try dump_dir_name first if
	dump_base_name isn't an absolute path.
	(common_handle_option): Handle OPT_dumpdir.

	* toplev.c (dump_dir_name): New.
	(print_switch_values): Also ignore -dumpdir.

	* toplev.h (dump_dir_name): New.

gcc/lto/

2010-01-03  H.J. Lu  <hongjiu.lu@intel.com>

	PR lto/41564
	* lto.c (DUMPBASE_SUFFIX): New.
	(lto_execute_ltrans): Append a sequence number to -dumpbase
	for LTRANS.

From-SVN: r155591