Hello Andi, Bob, * Bob Friesenhahn wrote on Tue, Oct 05, 2010 at 12:30:51AM CEST: > On Mon, 4 Oct 2010, Andi Kleen wrote: > > >I discovered that libtool breaks gcc LTO (link time optimization) > > > >Is there a solution or a workaround known? > > > >I'm using libtool 2.2.6b > > Maybe you should use libtool 2.4?
Yep, 2.4 should work with GCC LTO in every way *except* when partial linking is involved in the process. The latter should generally only happen when command line length limits are exceeded. We didn't try to work around the 'ld -r' case because IIUC gold was going to be enhanced to also support this OOTB (right?). Getting Libtool 2.4 into GCC before 4.6 is on my list, by the way. > [...] if you are using Automake I > have heard that there are some fixes in development Automake which > are needed/useful for -flto. I'm not aware of fixes needed in Automake. Care to point them out? Thanks, Ralf _______________________________________________ http://lists.gnu.org/mailman/listinfo/libtool
