Re: Bug#554574: libstdc++6: apt segfaults on hppa
On Fri, Nov 20, 2009 at 05:44:25PM -0500, Carlos O'Donell wrote:
> On Fri, Nov 20, 2009 at 10:31 AM, Aurelien Jarno <aurelien@aurel32.net> wrote:
> > Domenico Andreoli a écrit :
> >> On Thu, Nov 05, 2009 at 06:47:11PM +0100, Domenico Andreoli wrote:
> >>> On Thu, Nov 5, 2009 at 5:43 PM, Matthias Klose <doko@debian.org> wrote:
> >>>> On 05.11.2009 14:30, Domenico Andreoli wrote:
> >>>>> frankly i do not know what to do next, besides trying to rebuild gcc-4.4
> >>>>> 4.4.2-1 with latest eglibc to see if it is the culprit
> >>>> or rebuild against eglibc-2.9. could you do this as a test?
> >>> yes, build started
> >>
> >> the gcc 4.4.2-2 built with eglibc 2.9-25 has not the problem and current
> >> gcc 4.4.2-1 is built with eglibc 2.9-26 [0]. should i try building
> >> 4.4.2-1 with eglibc 2.10.1-5 or are we convinced it is NPTL?
> >
> > At least we are convinced it's eglibc 2.10.1, not 100% sure it is due to
> > NPTL.
> >
> > I have done some more tests, showing it's a bit more complicated than
> > that. apt-get from stable/testing/unstable:
> > - works with libstdc++6 built against eglibc 2.9
> > - segfaults with libstdc++6 built against eglibc 2.10.1
> >
> > Then I tried to rebuild apt against the "broken" libstdc++6.
> > Surprisingly this new apt-get:
> > - works with libstdc++6 built against eglibc 2.10.1
> > - segfaults with libstdc++6 built against eglibc 2.9
> >
> > So in short, it seems that using eglibc 2.10.1 to build libstdc++6
> > triggers an ABI change on this library. I haven't investigated more for
> > now, I am not sure when I'll have time to do it.
>
> This is not surprising, Dave has already pointed out that the debian
> libstdc++6 testsuite run clearly has an ABI failure e.g.
> ~~~
> FAIL: abi_check
> ~~~
>
This test actually fails for both old and new version, I actually don't
know for how long it fails.
Also comparing the two versions with the extract_symvers scripts from
gcc sources doesn't show any difference. Looks like the problem is a bit
more complex than it seems.
--
Aurelien Jarno GPG: 1024D/F1BCDB73
aurelien@aurel32.net http://www.aurel32.net
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