Apologies, libstdc++ is what I meant (too used to arguing about glibc compatibility). Devtoolset forcibly disables the `_GLIBCXX_USE_CXX11_ABI` flag because the mixed linkage model it uses can't support it: https://bugzilla.redhat.com/show_bug.cgi?id=1546704. RHEL / CentOS 8 does support the new ABI.
-Keith On Fri, Sep 10, 2021 at 11:13 AM Antoine Pitrou <anto...@python.org> wrote: > > Le 10/09/2021 à 17:05, Keith Kraus a écrit : > > For what it's worth, setting it to 1 as opposed to 0 will make the > package > > incompatible with CentOS / RHEL 7 as the glibc they ship does not support > > the new ABI. > > It is not about the glibc, it's about the stdlibc++. > > > > > > -Keith > > > > On Fri, Sep 10, 2021, 4:53 AM Philipp Moritz <pcmor...@gmail.com> wrote: > > > >> Ah ok, that makes sense! I'm also not even sure if > >> _GLIBCXX_USE_CXX11_ABI=0 was ever mandated on manylinux1, it might > >> just be a community convention. > >> > >> I posted > >> > >> > https://discuss.python.org/t/how-to-set-glibcxx-use-cxx11-abi-for-manylinux2014-and-manylinux2010-wheels/10551 > >> , > >> we can shift the discussion there. > >> > >> On Fri, Sep 10, 2021 at 1:45 AM Antoine Pitrou <anto...@python.org> > wrote: > >> > >>> > >>> Le 10/09/2021 à 10:05, Philipp Moritz a écrit : > >>>> Thanks for your answer Antoine! > >>>> > >>>> Considering your first comment, there is a section in > >>>> https://www.python.org/dev/peps/pep-0571 under "Backwards > >> compatibility > >>>> with manylinux1 wheels" that states > >>>> "manylinux1 wheels are considered manylinux2010 wheels" and the same > >>> remark > >>>> in https://www.python.org/dev/peps/pep-0599/ for manylinux2014 about > >>>> compatibility with both manylinux2010 and manylinux1. > >>> > >>> As far as I understand, this sentence is talking about system > >>> compatibility: if you can use manylinux2010 wheels on a system, you can > >>> also use manylinux1 wheels. That doesn't necessarily mean a manylinux1 > >>> wheel will nicely interoperate with a manylinux2010 wheel that would > >>> expose the same symbols. > >>> > >>> It seems wheel-to-wheel interoperability is a grey area of the > manylinux > >>> specs. To their credit, though, the issues with C++ symbol / ABI > >>> conflicts are pretty abstruse and almost impossible to predict. > >>> > >>> Regards > >>> > >>> Antoine. > >>> > >> > > >
