Better system detection for ATLAS

[jpflori]

See lots of rants in #10508.

This fixes a bunch of problems with ATLAS detection system.
Adds support for (some) ARM hard float systems.
Adds archdefs for Raspberry Pi and Cygwin64.

Use tarball at:

• http://boxen.math.washington.edu/home/jpflori/upstream/atlas-3.10.1.20140210.tar.bz2

Depends on #14699

CC: @nexttime

Component: packages: standard

Keywords: atlas, days57

Author: Jean-Pierre Flori

Branch/Commit: 3f1defb

Reviewer: Volker Braun

Issue created by migration from https://trac.sagemath.org/ticket/14605

[jpflori]

comment:2

Preliminary spkg, please torture it but nothing is commited or documented, I'll try to do that over the week end but as it may not happen here is some stuff to test.

In particular it should (not tested!) work:

• for non-threaded libraries anywhere, especially on computers with a single threaded unique core,
• threaded on debian/sparc,
• threaded on debian/powerpc,
  whereas it used not to before.
  (I just remembered that "-t 0" is passed to configure in spkg-install so threads will always be disabled unless you change that.)

[vbraun]

Author: Jean-Pierre Flori

[vbraun]

comment:3

I fixed your url

Disabling threading unconditionally sucks big time on all modern hardware.

[jpflori]

comment:4

Thanks!
I really uploaded that in a hurry.
And it's not intended to always disable threading all the time in the final version.
It is just what I was testing and forgot to comment again the "-t 0" line before uploading...

[jpflori]

comment:5

Should be fixed now.

[jpflori]

comment:6

Everything is commited now.
If p0 of #10508 is integrated upstream and tagged in between, this might need a slight rebase.

[jpflori]

comment:7

Or we could just skip #10508...

[jpflori]

comment:8

nah, there are patches to the Sage library on #10508 so it's a bad idea to go too fast.

[jpflori]

comment:9

And the new detect.patch did not get included in my latest spkg. Groumpf.

[jpflori]

comment:10

Should be ok now.

[jpflori]

comment:11

This still does not correctly detect cpu speed on debian sparc.

[jpflori]

comment:12

Ok, got it, my hex reading functions are broken.

[jpflori]

comment:13

Should be fixed now.

[jpflori]

Attachment: atlas-3.10.1.p1.diff.gz

Spkg diff, for review only.

[jpflori]

Dependencies: #14605

[jpflori]

Work Issues: rebase

[jdemeyer]

Changed dependencies from #14605 to #14699

[jpflori]

comment:18

Should be rebased on top of #14410.
Also note that the most important patch from here was already merged into our spkg by Volker at some point IIRC.

[jpflori]

New commits:

9d2673f

Better system detection for ATLAS.

[jpflori]

Commit: 9d2673f

[jpflori]

Changed keywords from atlas threads to atlas

[jpflori]

Branch: u/jpflori/ticket/14605

[jpflori]

Changed work issues from rebase to none

[sagetrac-git]

Changed commit from 9d2673f to 3f1defb

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. New commits:

72e6977	Merge remote-tracking branch 'trac/develop' into ticket/14605
3f1defb	Fix autotools optional spkg checksum spurious change.

[vbraun]

Reviewer: Volker Braun

[vbraun]

Changed keywords from atlas to atlas, days57

[vbraun]

comment:23

lgtm

[vbraun]

Changed branch from u/jpflori/ticket/14605 to 3f1defb