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<div dir="ltr"><div>It looks like x32 support was added in the development/3.11 (using -b -32 instead) in July 2012: <br></div><div><a href="https://github.com/math-atlas/math-atlas/commit/5cd827d381a67fc575c4e8e331cddbbe8a12efe8">https://github.com/math-atlas/math-atlas/commit/5cd827d381a67fc575c4e8e331cddbbe8a12efe8</a></div><div><a href="https://github.com/math-atlas/math-atlas/commit/b25a55524c1a16dd9fcbe1f0bfd57cd94a050cfa">https://github.com/math-atlas/math-atlas/commit/b25a55524c1a16dd9fcbe1f0bfd57cd94a050cfa</a><br></div>However we're using 3.10, released around the same time, and the stab310 branch did not get those patches.</div><div dir="ltr"><br></div>

</div><div>Gentoo also appears to have a patchset including x32 support:<br></div><div><a href="https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=7728e30c9b59f5c7f4855d8fc7aa9240cda567ba">https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=7728e30c9b59f5c7f4855d8fc7aa9240cda567ba</a><br></div><div><br></div><div>Their main patch is here:</div><div><a href="https://gitweb.gentoo.org/repo/gentoo.git/diff/sci-libs/atlas/files/atlas-3.10.2-x32-support.patch?id=7728e30c9b59f5c7f4855d8fc7aa9240cda567ba">https://gitweb.gentoo.org/repo/gentoo.git/diff/sci-libs/atlas/files/atlas-3.10.2-x32-support.patch?id=7728e30c9b59f5c7f4855d8fc7aa9240cda567ba</a></div><div>but they hand atlas_configure '-b 48' instead of -32.</div><div><br></div></div><div>Perhaps one of these could be adapted to Debian?</div><div><br></div><div>---<br></div><div><br></div><div>Or maybe an update to 3.11 makes more sense?</div><div><a href="http://math-atlas.sourceforge.net/errata.html">http://math-atlas.sourceforge.net/errata.html</a> reports that:</div><div>"ATLAS 3.10 is more constrained
     in its block factors and storage formats, and on many modern machines this
     can cut performance by around half."</div><div>This was also noted in 
<a href="https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=833139">https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=833139</a></div><div><br></div><div>Best regards,<br></div>-- <br><div dir="ltr" class="gmail_signature">Laurence "GreenReaper" Parry<br><a href="https://www.greenreaper.co.uk/" target="_blank">https://www.greenreaper.co.uk/</a></div></div></div></div></div></div></div></div>