Pretty sure the 2010 and 2014 images both have much newer compilers than that.

There are still a lot of users on CentOS 6, so I'd still stick to 2010 for now on x86_64 at least. We could potentially start adding 2014 wheels for the other platforms where we currently don't ship wheels – gotta be better than nothing, right?

There probably still is some tail of end users whose pip is too old to know about 2010 wheels. I don't know how big that tail is. If we wanted to be really careful, we could ship both manylinux1 and manylinux2010 wheels for a bit – pip will automatically pick the latest one it recognizes – and see what the download numbers look like.

On Tue, Feb 4, 2020, 13:18 Charles R Harris <> wrote:
Hi All,

Thought now would be a good time to decide on upgrading manylinux for the 1.19 release so that we can make sure that everything works as expected. The choices are
manylinux1 -- CentOS 5, currently used, gcc 4.2 (in practice 4.5), only supports i686, x86_64.
manylinux2010 -- CentOS 6, gcc 4.5, only supports i686, x86_64.
manylinux2014 -- CentOS 7, gcc 4.8, supports many more architectures.

The main advantage of manylinux2014 is that it supports many new architectures, some of which we are already testing against. The main disadvantage is that it requires pip >= 19.x, which may not be much of a problem 4 months from now but will undoubtedly cause some installation problems. Unfortunately, the compiler remains archaic, but folks interested in performance should be using a performance oriented distribution or compiling for their native architecture.


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