http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48538
--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-04-10 11:52:02 UTC --- (In reply to comment #2) > Ok. In the documentation it said that was equivalent to -flto in BOOT_CFLAGS, > that's why I used it. > Now I've checked bootstrap-lto.mk and looks like it disables lto when doing a > profiled bootstrap. Is it right? I wonder what gives better performance: lto > or > profiled-driven optimizations... It disables LTO during the profile instrumented stage to speed up the compile of that. The final executables are still built with profile feedback and LTO.
