Re: Bug#554574: libstdc++6: apt segfaults on hppa
On Fri, Nov 20, 2009 at 07:00:26PM -0600, Matthias Klose wrote:
> On 20.11.2009 16:44, 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
>> ~~~
>
> I don't have a build around, but isn't this due to the one symbol
> accidentally exported in an earlier libstdc++ version?
>
> * Address PR libstdc++/39491, removing __signbitl from the libstdc++6
> symbols file on hppa.
>
I confirm, it's what I see in the testsuite log:
| 77
| __signbitl
| version status: incompatible
| GLIBCXX_3.4
| type: function
| status: added
--
Aurelien Jarno GPG: 1024D/F1BCDB73
aurelien@aurel32.net http://www.aurel32.net
Reply to: