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Re: Eigenvalues/vectors of Hermitian matrices


OK, thanks-- that was it.  The problem went away when I built gsl with 
optimization turned off.
Do you know of any reason why I should avoid upgrading to gcc 3.0.x?

At 12:40 PM 3/6/2002 -0800, John Abedor wrote:
>John Ketchum wrote:
>
> > I have installed gsl-1.0.  When doing make check, i get many failure
> > messages in the eigensystem tests, all concerning eigen analysis of
> > hermitian matrices.  The messages are of the form:
> >
> > FAIL: herm(4), eigenvalue(2,3), real, val/asc (0 observed vs
> > 9.74766689339349166e+127 expected)
> >
> > or similar.   All of the tests for real symmetric tests seem to pass.
> >
> > I have done the install on three similar RedHat 7.2 systems, and also tried
> > to install gsl-1.1, all with the same result.
> >
> > kernel 2.4.7-10 and 2.4.9-13
> > gcc 2.96-98
> >
> > John Ketchum
> > Qualcomm Inc.
>
>This sounds like the usual gcc 2.96 compiler bug. It's mentioned in the
>MACHINES file (albeit under Compaq/DEC Alpha). You can upgrade
>your compiler or turn off optimizations
>
>regards,
>John

John Ketchum
Qualcomm Inc.
9 Damonmill Square Suite 2A
Concord, MA 01742
Office: 60915
Direct: 781-276-0915
Fax: 781-276-0901
Mobile: 617-312-7023


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