gcc.c (PLUGIN_COND): Always enable unless -fno-use-linker-plugin or -fno-lto is specified and the...

2014-03-06  Richard Biener  <rguenther@suse.de>

	* gcc.c (PLUGIN_COND): Always enable unless -fno-use-linker-plugin
	or -fno-lto is specified and the linker has full plugin support.
	* collect2.c (lto_mode): Default to LTO_MODE_WHOPR if LTO is
	enabled.
	(main): Remove -flto processing, adjust lto_mode using
	use_plugin late.
	* lto-wrapper.c (merge_and_complain): Merge compile-time
	optimization levels.
	(run_gcc): And pass it through to the link options.

From-SVN: r208375