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

It looks like we've had a numbering collision

https://github.com/pypa/interoperability-peps/pull/30/files is the PEP
Tennessee is working on

On Thu, Aug 13, 2015 at 10:56 AM Nathaniel Smith <n...@pobox.com> wrote:

> On Aug 12, 2015 16:49, "Robert Collins" <robe...@robertcollins.net> wrote:> >> > I'm not sure what will be needed to get the PR accepted; At PyCon AU> > Tennessee Leuwenberg started drafting a PEP for the expression of> > dependencies on e.g. BLAS - its been given number 497, and is in the> > packaging-peps repo; I'm working on updating it now.>> I wanted to take a look at this PEP, but I can't seem to find it. PEP 497:>   https://www.python.org/dev/peps/pep-0497/> appears to be something else entirely?>> 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.>> -n> _______________________________________________> Distutils-SIG maillist  -  Dist...@python.org> https://mail.python.org/mailman/listinfo/distutils-sig>