From 8b75021c27b87e74505f2f5dc5d99868a38cd6a1 Mon Sep 17 00:00:00 2001
From: Christoph Groth <christoph.groth@cea.fr>
Date: Fri, 6 Sep 2013 00:36:18 +0200
Subject: [PATCH] fix failing test with OpenBLAS
---
INSTALL | 25 ++++---------------------
kwant/solvers/tests/_test_sparse.py | 2 +-
2 files changed, 5 insertions(+), 22 deletions(-)
diff --git a/INSTALL b/INSTALL
index 4d3fa36..98ffd65 100644
--- a/INSTALL
+++ b/INSTALL
@@ -222,10 +222,10 @@ Unix-like systems (Linux)
-------------------------
Kwant should run on all recent Unix-like systems. The following instructions
-have been verified to work on Debian 6 (Squeeze) or newer, and on Ubuntu 12.04
-(see :ref:`Note <ubuntu-problem>` below) or newer. For other distributions step
-1 will likely have to be adapted. If Ubuntu-style ``sudo`` is not available,
-the respective command must be run as root.
+have been verified to work on Debian 7 (Wheezy) or newer, and on Ubuntu 12.04 or
+newer. For other distributions step 1 will likely have to be adapted. If
+Ubuntu-style ``sudo`` is not available, the respective command must be run as
+root.
1. Install the required packages. On Debian-based systems like Ubuntu this can
be done by running the command ::
@@ -261,23 +261,6 @@ You can make this setting permanent by adding this line to the file
``.bashrc`` (or equivalent) in your home directory.
-.. _ubuntu-problem:
-
-Known problem on Ubuntu 12.04 32-bit (i486)
-...........................................
-
-With Ubuntu 12.04 running on 32-bit Intel architecture processors the following
-error has been observed when running the tests included with Kwant: "Arrays are
-not almost equal to 7 decimals". That problem seems to be due to a bug in the
-OpenBLAS package included with that version of Ubuntu. It can be worked-around
-by installing a different BLAS. Execute the following shell commands::
-
- sudo apt-get install libblas3gf
- sudo update-alternatives --config libblas.so.3gf
-
-and select the "libblas.so.3gf" alternative when prompted by the second command.
-
-
Mac OS X
--------
diff --git a/kwant/solvers/tests/_test_sparse.py b/kwant/solvers/tests/_test_sparse.py
index 1e62908..2970456 100644
--- a/kwant/solvers/tests/_test_sparse.py
+++ b/kwant/solvers/tests/_test_sparse.py
@@ -63,7 +63,7 @@ def test_output(smatrix):
s2, modes2 = result2.data, result2.lead_info
assert s2.shape == (len(modes2[1].momenta) // 2,
len(modes2[0].momenta) // 2)
- assert_almost_equal(s1, s2)
+ assert_almost_equal(abs(s1), abs(s2))
assert_almost_equal(np.dot(s.T.conj(), s),
np.identity(s.shape[0]))
assert_raises(ValueError, smatrix, fsys, out_leads=[])
--
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