[Pythonmac-SIG] linking extensions for older builds with newer pythons...

[Chris Barker]

The numpy folks are trying hard to get binary wheel sup on PyPi yeah!

But this brought hup an issue -- PyPI policy is that binary wheels should
be built for the python.org binaries -- which is great.

The Python.org binaries are built for >=10.6, 32+64 bit Intel, and have the
platfrom name:

10_6_intel

All is well and good. The complication:

The Apple builds of Python presumably use the newer SDKs, and have platform
names like:

10_7_intel

the 10_7 does not match the 10_6, and thus pip will not install the binary.

If you re-name the wheel, then pip happily installs it, and it seems to
work fine.

So there is a pull request for a patch to the tools to support >=10_6,
rather than =10_6 -- so that packages built python.org build will also
be installable on newer builds.

This has worked for years with numpy and others (and now that I think about
it, wxPython has binaries that work on python.org and Apple's build.)

So is it officially supported to link a *.so built against a older SDK to a
application buit with a newer SDK? If so ,then this seems a
nice convenience for the MAc crowd.

-Chris




-- 

Christopher Barker, Ph.D.
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