Re: [Distutils] PEP for dependencies on libraries like BLAS (was: Re: Working toward Linux wheel support)

2015-08-12 20:51 GMT-04:00 Nathaniel Smith <n...@pobox.com>:
>> I'm a bit surprised to hear that such a PEP is needed. We (= numpy devs)> have actively been making plans to ship a BLAS wheel on windows, and AFAICT> this is totally doable now -- the blocker is windows toolchain issues, not> pypa-related infrastructure.>> Specifically the idea is to have a wheel that contains the shared library as> a regular old data file, plus a stub python package that knows how to find> this data file and how to make it accessible to the linker. So> numpy/__init__.py would start by calling:>> import pyopenblas1> # on Linux modifies LD_LIBRARY_PATH,> # on Windows uses ctypes to preload... whatever> pyopenblas1.enable()>> and then get on with things, or the build system might do:>> import pyopenblas1> pyopenblas1.get_header_directories()> pyopenblas1.get_linker_directories()>> This doesn't help if you want to declare dependencies on external, system> managed libraries and have those be automatically somehow provided or> checked for, but to me that sounds like an impossible boil-the-ocean project> anyway, while the above is trivial and should just work.

+1

-- 
Olivier
http://twitter.com/ogrisel - http://github.com/ogrisel
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