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Re: trying to solve the pytango FTBFS with gcc5

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From	Dmitry Shachnev <mitya57@debian.org>
Newsgroups	linux.debian.maint.python
Subject	Re: trying to solve the pytango FTBFS with gcc5
Date	Sun, 06 Sep 2015 18:10:01 +0200
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On Sun, 06 Sep 2015 18:28:04 +0300, Dmitry Shachnev wrote:
> The actual error is about another symbol:
>
>   _PyTango.so: undefined symbol: _ZN5Tango17ranges_type2constIjE3strE
>
> This symbol is old ABI, as opposed to _ZN5Tango17ranges_type2constIjE3strB5cxx11E
> (which *does* exist in libtango.so.8).
>
> Can it be a bug in GCC? I don't think it should produce such a broken _PyTango.so.

I have created a small test project (attached) that has a library exporting
"std::string Tango::ranges_type2const<short>::str" symbol and a test program
using it.

Interestingly, GCC uses the symbol _ZN5Tango17ranges_type2constIjE3strE
(*without* the B5cxx11 part) for both library and client.

So now I wonder why does libtango have B5cxx11 in it symbols and what is it
needed for.

--
Dmitry Shachnev

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Thread

trying to solve the pytango FTBFS with gcc5 PICCA Frederic-Emmanuel <frederic-emmanuel.picca@synchrotron-soleil.fr> - 2015-09-06 11:20 +0200
  Re: trying to solve the pytango FTBFS with gcc5 Scott Kitterman <debian@kitterman.com> - 2015-09-06 16:30 +0200
    Re: trying to solve the pytango FTBFS with gcc5 Matthias Klose <doko@debian.org> - 2015-09-06 16:40 +0200
      Re: trying to solve the pytango FTBFS with gcc5 Dmitry Shachnev <mitya57@debian.org> - 2015-09-06 17:30 +0200
        Re: trying to solve the pytango FTBFS with gcc5 Dmitry Shachnev <mitya57@debian.org> - 2015-09-06 18:10 +0200
          RE:trying to solve the pytango FTBFS with gcc5 PICCA Frederic-Emmanuel <frederic-emmanuel.picca@synchrotron-soleil.fr> - 2015-09-06 18:40 +0200
          RE:trying to solve the pytango FTBFS with gcc5 PICCA Frederic-Emmanuel <frederic-emmanuel.picca@synchrotron-soleil.fr> - 2015-09-06 18:40 +0200
        RE:trying to solve the pytango FTBFS with gcc5 PICCA Frederic-Emmanuel <frederic-emmanuel.picca@synchrotron-soleil.fr> - 2015-09-06 18:40 +0200

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