[Numpy-discussion] further questions: numpy on Solaris x86 with sun CC and libsunperf

[David M. Cooke]

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Peter C. Norton wrote:
> I have found a way to build numpy on solaris x86 with
> libsunperf. Basically, using the static library, and removing the
> compiler flag for libf77compat (I think it's deprecated and has been
> removed) and furthermore symlinking liblapack.a and libblas.a to the actual
> libsunperf.a seems to result in a successful build.
> 
> However, running numpy.test() results in the following error:
> 
> ....................................................................................F........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
> ======================================================================
> FAIL: check_large_types (numpy.core.tests.test_scalarmath.test_power)
> ----------------------------------------------------------------------
> Traceback (most recent call last):
>   File "[long path removed]/python-2.5.1c1/lib/python2.5/site-packages/numpy/core/tests/test_scalarmath.py", line 46, in check_large_types
>     assert b == 6765201, "error with %r: got %r" % (t,b)
> AssertionError: error with <type 'numpy.float96'>: got 6765201.00000000000364
> 
> ----------------------------------------------------------------------
> Ran 573 tests in 1.462s
> 
> FAILED (failures=1)
> <unittest.TextTestRunner object at 0x84a998c>
> 
> 
> Can anyone offer an opinion as to the severity of this failure?

Only serious if you're using long doubles. I'm not sure where the extra
is coming from (it's about an error of 2^-60). Could be that Solaris's
support for long doubles isn't quite good enough.

- --
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|David M. Cooke              http://arbutus.physics.mcmaster.ca/dmc/
|cookedm at physics.mcmaster.ca
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