[Discuss-gnuradio] accuracy problem?

[David P. Reed]

I'm trying to install the gnuradio software from CVS on Fedora Core 3 on 
an AMD64 (x86_64) laptop (and python 2.3).   Aside from annoying 
pathname bugs and quirks with FFTW linking, which I will report 
separately, I get the following error when testing gnuradio-core, where 
a unittest fails.   Anyone who has a clue why this imprecision might be 
happening?  If I change this one test to check for 5 digits after the 
decimal point, it works...

Also, has anyone gotten gnuradio to run on x86_64?

======================================================================
FAIL: test_complex_to_arg (__main__.test_complex_ops)
----------------------------------------------------------------------
Traceback (most recent call last):
 File "./qa_complex_to_xxx.py", line 111, in test_complex_to_arg
   self.assertFloatTuplesAlmostEqual (expected_result, actual_result, 6)
 File 
"/gnuradio/gr-build/gnuradio-core/src/python/gnuradio/gr_unittest.py", 
line 55, in assertFloatTuplesAlmostEqual
   self.assertAlmostEqual (a[i], b[i], places, msg)
 File "/usr/lib64/python2.3/unittest.py", line 322, in 
failUnlessAlmostEqual
   raise self.failureException, \
AssertionError: 2.3561944901923448 != 2.3561935424804688 within 6 places