On Tue, Oct 6, 2015 at 6:07 PM, Nathaniel Smith <n...@pobox.com> wrote:
> On Tue, Oct 6, 2015 at 10:00 AM, Antoine Pitrou <solip...@pitrou.net> > wrote: > > On Tue, 6 Oct 2015 09:40:43 -0700 > > Nathaniel Smith <n...@pobox.com> wrote: > >> > >> If you need some npy_* function it'd be much better to let us know > >> what it is and let us export it in an intentional way, instead of just > >> relying on whatever stuff we accidentally exposed? > > > > Ok, we seem to be using only the complex math functions (npy_cpow and > > friends, I could make a complete list if required). > > And how are you getting at them? Are you just relying the way that on > ELF systems, if two libraries are loaded into the same address space > then they automatically get access to each other's symbols, even if > they aren't linked to each other? What do you do on Windows? > It is possible (and documented) to use any of the npy_ symbols from npymath from outside numpy: http://docs.scipy.org/doc/numpy-dev/reference/c-api.coremath.html#linking-against-the-core-math-library-in-an-extension The design is not perfect (I was young and foolish :) ), but it has worked fairly well and has been used in at least scipy since the 1.4/1.5 days IIRC (including windows). David > > > And, of course, we would also benefit from the CBLAS functions (or any > > kind of C wrappers around them) :-) > > https://github.com/numpy/numpy/issues/6324 > > This is difficult to do from NumPy itself -- we don't necessarily have > access to a full BLAS or LAPACK API -- in some configurations we fall > back on our minimal internal implementations that just have what we > need. > > There was an interesting idea that came up in some discussions here a > few weeks ago -- we already know that we want to package up BLAS > inside a Python package that (numpy / scipy / scikit-learn / ...) can > depend on and assume is there to link against. > > Maybe this new package would also be a good place for exposing these > wrappers? > > -n > > -- > Nathaniel J. Smith -- http://vorpus.org > _______________________________________________ > NumPy-Discussion mailing list > NumPy-Discussion@scipy.org > https://mail.scipy.org/mailman/listinfo/numpy-discussion >
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