Re: trying to solve the pytango FTBFS with gcc5
On 09/06/2015 04:24 PM, Scott Kitterman wrote:
> On Sunday, September 06, 2015 08:23:37 AM PICCA Frederic-Emmanuel wrote:
>> Hello, guyes,
>>
>> I am working on this bug report[1], and I would like your opinion.
>> this package depends on the tango library which was rebuilt with gcc5 and
>> updated for the libstdc++6 transition.
>>
>> Now as you can see in the bug report, pytango FTBFS with a missing symbol.
>> and indeed the missing symbol correspond to a c++11 string.
>>
>> I would like to understand why pytango expect old abi string instead of the
>> new c++11 even if during the build -std=cxx01 is given to gcc. For
>> information the files are in fact c++ files.
>>
>> I also tryed with c++11 and I got the same error.
>>
>> So I do not understand what is going on.
>> Is there something special done by distutil when compiling an extension ?
>> is it a problem with gcc (the C compiler) which doesn not use correctly the
>> -std:cxx flag when compiling c++ files ?
>>
>> any help would be appreciate.
>>
>> thanks
>>
>> Frederic
>>
>>
>> [1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=797284
>
> The old abi is explicitly set by line 261 of setup.py.
no. the libstdc++ ABI is unrelated to the C++ standard used for the build.
the symbol is defined:
$ objdump -T /usr/lib/x86_64-linux-gnu/libtango.so|grep
_ZN5Tango11DeviceProxy14get_corba_nameB5cxx11Eb
00000000002ce1a0 g DF .text 0000000000000388 Base
_ZN5Tango11DeviceProxy14get_corba_nameB5cxx11Eb
so find out why _PyTango.so doesn't find it.
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