[SciPy-user] problems with scipy.test() on Opteron 64-bit
pearu at scipy.org
Thu Nov 25 09:14:23 CST 2004
On Thu, 25 Nov 2004, Giovanni Samaey wrote:
>> If those fail as well then try a C program that uses dgeev to solve the
>> same eigenvalue problem:
>> $ gcc main.c -llapack
>> $ ./a.out
> I get (after adding some -lblas -lm and paths etc...)
> which probably shows that the error comes from lapack.
> (This is with the lapack I compiled myself in an intermediate step to build
> atlas for scipy.)
> Just to repeat how I compiled lapack: I took the Makefile and added -fPIC and
> -m64 there to give it the same compiler options as that atlas makefile.
Now try building Fortran lapack without optimization flags and see if you
still get incorrect results.
I think it is reasonable to check also if the incorrect results are
related to gcc 3.2 that you are using. I might be wrong but gcc 3.2
is probably older than Opterons..
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