On Sat, 2011-02-26 at 18:45 +0100, Richard Guenther wrote: > On Sat, Feb 26, 2011 at 12:22 AM, Steve Ellcey <s...@cup.hp.com> wrote: > > > > I am looking at an lto bug on ia64-hp-hpux11.23. If I compile > > g++.dg/torture/pr33572.C with -flto on this platform I get: > > > > ld: Unsatisfied symbol "__gcc_personality_v0" in file > > /var/tmp//ccYlpGzO.ltrans0.ltrans.o > > 1 errors. > > collect2: ld returned 1 exit status > > > > (This is using the HP linker which I do for all my GCC builds.) > > so you do not have the linker-plugin?
Correct. > I think this hints at an issue with the collect2 LTO path. It would > be interesting > to see where references to the missing symbols appear / vanish - just look > at all intermediate files generated. > > Richard. This is interesting, there seem to be two different variables at play here. __gcc_personality_v0 and __gxx_personality_v0. When I compile with '-flto -O2' the error I get is about __gcc_personality_v0. When I look at the two assembly files created during this compililation I see: ccG1Elhg.ltrans0.s: .global __gcc_personality_v0# ccG1Elhg.ltrans0.s: .type __gcc_personality_v0#, @function ccG1Elhg.ltrans0.s: .personality __gcc_personality_v0# pr33572.s: stringz "\0014__gxx_personality_v0" pr33572.s: .global __gxx_personality_v0# pr33572.s: .type __gxx_personality_v0#, @function pr33572.s: .personality __gxx_personality_v0# When I add -flto-partition=none to the compilation, I do not get the ltrans file and I do not get any reference to __gcc_personality_v0. I don't think GCC has a __gcc_personality_v0 function, does it? This is probably why the linker is complaining, if you declare a function as external the HP linker will complain even if there are no uses of that function. I think the GNU linker would ignore the external declaration if there are no uses of it. Steve Ellcey s...@cup.hp.com
