David Cournapeau wrote:

Hi there,

I tried to compile numpy/scipy with recent LAPACK and BLAS versions (LAPACK 3.1.1, BLAS from the netlib package, not from LAPACK, using gfortran as a compiler everywhere), and I got several errors when testing scipy:

====================================================================== FAIL: check_syevr (scipy.lib.tests.test_lapack.test_flapack_float) ---------------------------------------------------------------------- Traceback (most recent call last): File "/home/david/local/lib/python2.5/site-packages/scipy/lib/lapack/tests/esv_tests.py", line 41, in check_syevr assert_array_almost_equal(w,exact_w) File "/home/david/local/lib/python2.5/site-packages/numpy/testing/utils.py", line 230, in assert_array_almost_equal header='Arrays are not almost equal') File "/home/david/local/lib/python2.5/site-packages/numpy/testing/utils.py", line 215, in assert_array_compare assert cond, msg AssertionError: Arrays are not almost equal

(mismatch 33.3333333333%) x: array([-0.66992444, 0.48769468, 9.18222618], dtype=float32) y: array([-0.66992434, 0.48769389, 9.18223045])

====================================================================== FAIL: check_syevr_irange (scipy.lib.tests.test_lapack.test_flapack_float) ---------------------------------------------------------------------- Traceback (most recent call last): File "/home/david/local/lib/python2.5/site-packages/scipy/lib/lapack/tests/esv_tests.py", line 66, in check_syevr_irange assert_array_almost_equal(w,exact_w[rslice]) File "/home/david/local/lib/python2.5/site-packages/numpy/testing/utils.py", line 230, in assert_array_almost_equal header='Arrays are not almost equal') File "/home/david/local/lib/python2.5/site-packages/numpy/testing/utils.py", line 215, in assert_array_compare assert cond, msg AssertionError: Arrays are not almost equal

(mismatch 33.3333333333%) x: array([-0.66992444, 0.48769468, 9.18222618], dtype=float32) y: array([-0.66992434, 0.48769389, 9.18223045])

----------------------------------------------------------------------

The different dtype may suggest an error while compiling the BLAS/LAPACK, but I tested the libraries with official tester without any error.

cheers,

David _______________________________________________ Scipy-dev mailing list Scipy-dev@scipy.org http://projects.scipy.org/mailman/listinfo/scipy-dev

Hi David, I can confirm your findings. BTW, is there a way to obtain the information which version of LAPACK is used via scipy.show_config() ? I mean something like [('ATLAS_INFO', '"\\"3.7.28\\""')] Cheers, Nils