[SciPy-user] installation problem w/ scipy 0.2: flbas.so has undefined symbol srotmg_

Pearu Peterson pearu at cens.ioc.ee
Mon Jun 3 01:57:17 CDT 2002

On Sun, 2 Jun 2002, David Marimont wrote:

> I just downloaded the CVS version of scipy (0.2.0_alpha_101.3442) and

Reminder to scipy maintainers: this CVS version 0.2.0_alpha_101.3442 has
been constant for two months already...

> built and installed it without any apparent problems (after many false
> starts).  When I try to import it, here's what happens:
>    Python 2.2 (#1, Dec 24 2001, 15:43:58)
>    [GCC 2.96 20000731 (Red Hat Linux 7.1 2.96-98)] on linux2
>    Type "help", "copyright", "credits" or "license" for more information.
>    >>> import scipy
>    exceptions.ImportError: /usr/local/lib/python2.2/site-packages/scipy/linalg/fblas.so: undefined 
> symbol: srotmg_
>    >>>
> Does anyone know what's going wrong here? I've spent a little time poking
> through the archives to see what might be causing this problem, but nothing
> obvious popped up.  I apologize if I missed the relevant message...

See the thread starting at


Your problem is releated to incomplete BLAS library that some systems
provide. I would suggest using ATLAS that would give upto 10 speed up
compared to plain BLAS/LAPACK.


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