Problem with gcc4.7 and call_once

[Brian D. McGrew]

On 8/8/13 2:00 PM, "Jeremy Huddleston Sequoia" <jeremyhu at macports.org>
wrote:


>
>On Aug 8, 2013, at 13:53, Jeremy Huddleston Sequoia
><jeremyhu at macports.org> wrote:
>
>> 
>> On Aug 8, 2013, at 12:58, David Barto <DBarto at visionpro.com> wrote:
>> 
>>> It appears that the following is missing from the configuration for
>>>libstdc++.
>>> 
>>> --enable-libstdcxx-threads
>>> Enable C++11 threads support. If not explicitly specified, the
>>>configure process enables it if possible. It defaults to 'off' on
>>>Solaris 9, where it would break symbol versioning. This option can
>>>change the library ABI.
>>> 
>>> Yes, it changes the ABI, however for std::call_once to work, I think
>>>it is required. I don't think that the configuration process is setting
>>>it by default.
>> 
>> What makes you say that?  It looks like it is to me:
>
>...
>
>> Is your _GLIBCXX_HAS_GTHREADS undefined for some reason?  That doesn't
>>make sense...
>
>
>Yeah, it looks fine to me:
>
>libstdc++-v3/config.log:#define _GLIBCXX_HAS_GTHREADS 1
>

Where is the config.log?  Over in
/opt/local/var/macports/software/libstdc++ all I find is a tar ball of the
library???