#20507: Slight annoyance wrt Numpy and ATLAS
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Reporter: embray | Owner:
Type: defect | Status: new
Priority: minor | Milestone:
Component: PLEASE CHANGE | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by fbissey):
I am familiar with debian alternatives and its equivalent implementation
in gentoo. I am sure Jeroen is too. Like you say I am not sure we want to
go the full way in sage.
A meta package is I guess a vehicle we all have in mind but no one has
committed to writing that yet. Although the current spkg is partly a meta-
package already.
When I wrote about `configure` I didn't think about choosing the
"internal" blas/lapack but providing a system one if desired, but choosing
an internal one should probably be covered there as well.
I'll note that numpy/scipy is an oddity in informing you of the
blas/lapack used. Auto-detection by configure script is difficult because
of the variety of implementations. Most configure script just ask for the
library you want to use and don't really care what they are, only that
they work.
But to go back to your point, once you have gone to .pc files some
information is held in `{blas,cblas,lapack}.pc` the content could be a bit
more informative at least when set up by an internal spkg.
{{{
SAGE_ROOT=/Users/fbissey/build/sage-7.2.beta5
prefix=${SAGE_ROOT}/local
libdir=${prefix}/lib
includedir=${prefix}/include
Name: blas
Version: 1.0
Description: blas for sage, set up by the ATLAS spkg.
Libs: -L${libdir} -lblas
}}}
above the `blas.pc` on my mac. On mac we use Apple's accelerate framework
(and it is set up by the atlas spkg, as I say that spkg already has meta
bits). The description could reflect the fact that it is accelerate not
just that it has been set by the atlas spkg.
--
Ticket URL: <http://trac.sagemath.org/ticket/20507#comment:12>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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