On Thu, Apr 08, 2010 at 09:13:45AM -0400, Diego Novillo wrote: > > Perhaps the easiest option is to remove the feature. WHOPR does not > represent a lot of code over the basic LTO framework, so this should > be relatively easy and non-intrusive.
> > The first target I would shoot for, however, is to replace -combine with > -flto. I am bit confused by this last sentence. Isn't it already the case in gcc 4.5 that using -flto both at compile and at link times (usually a trivial way to do that might be "make CC='gcc-4.5 -flto -O2'" or something similar) is practically enough to replace the -combine flag? In other words, what are the real reasons to keep -combine in gcc 4.5? I feel it is becoming a deprecated feature.... (of course, it seems that the major difference is that -combine makes most name becoming local symbols, while -flto keeps all global names as global symbols from the linking point of view). So what are the real use cases of -combine not covered by -flto ? Cheers -- Basile STARYNKEVITCH http://starynkevitch.net/Basile/ email: basile<at>starynkevitch<dot>net mobile: +33 6 8501 2359 8, rue de la Faiencerie, 92340 Bourg La Reine, France *** opinions {are only mines, sont seulement les miennes} ***
