[Numpy-discussion] Bug in built in SVD?

[Chris Barker]

Nadav Horesh wrote:
> It can be a bit more complicate, the story is this:
> One my gentoo system I use ATLAS, and gentoo instaltion generates the ATLAS version of blas and lapack which omit some of the original blas/lapack routines. Till now I used the numarray/Numeric internal lapack_lite package, since every time I tried to compile against the external lapck, I could not load the linear-algebra package because I got an error complaining about a missing "dgesdd_".

I had the same issue, and got this reply from this very list:

Mats Klingberg wrote:
> I recently did this under Gentoo. It seems that the atlas package doesn't 
> build a complete lapack, which is necessary. Instead I emerged the newer 
> blas-atlas and lapack-atlas packages. These build a complete lapack library 
> with atlas optimizations. They are however masked with ~x86 so you have to 
> add the following to your /etc/portage/package.keywords:
> 
> app-sci/lapack-atlas ~x86
> app-sci/blas-atlas ~x86
> app-sci/blas-config ~x86
> app-sci/lapack-config ~x86
> 
> blas-config and lapack-config are packages that are needed by the other ones. 
> They can be used to switch between reference lapack or atlas optimized 
> libraries (if you install lapack-reference and blas-reference)
> 
> For more information see Gentoo bug #30453

I haven't had a chance to try it yet, but I will soon.

-Chris



-- 
Christopher Barker, Ph.D.
Oceanographer
                                     		
NOAA/OR&R/HAZMAT         (206) 526-6959   voice
7600 Sand Point Way NE   (206) 526-6329   fax
Seattle, WA  98115       (206) 526-6317   main reception

Chris.Barker at noaa.gov