On 02/03/2018 02:11 AM, Nathaniel Smith wrote:

Docker Images
-------------

``manylinux2`` Docker images based on CentOS 6.9 x86_64 and i686 are
provided for building binary ``linux`` wheels that can reliably be
converted to ``manylinux2`` wheels.  [8]_ These images come with a
full compiler suite installed (``gcc``, ``g++``, and ``gfortran``
4.8.2) as well as the latest releases of Python and  ``pip``.

We can and should use newer compiler versions than that, and probably
upgrade them again over the course of the image's lifespan, so let's
just drop the version numbers from the PEP entirely. (Maybe s/6.9/6/
as well for the same reason.)

Moving to GCC 5 and above will introduced the new libstd++ ABI. [1] The manylinux2 standard need to define which ABI compiled libraries should be compiled against as older version of libstdc++ will not support the new ABI. From what I recall the devtoolset packages for CentOS can only target the older, _GLIBCXX_USE_CXX11_ABI=0, ABI.

Cheers,

- Jonathan Helmus

[1] https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_dual_abi.html