[SciPy-user] ATLAS and gcc v4.0.2

Nils Wagner nwagner at mecha.uni-stuttgart.de
Tue Feb 28 04:29:41 CST 2006


On Tue, 28 Feb 2006 19:20:55 +0900
  Christian Kristukat <ckkart at hoc.net> wrote:
> Nils Wagner wrote:
>>>>
>>>> SuSE 10.0 comes with gcc-fortran
>>>>
>>>> Name        : gcc-fortran                  Relocations: 
>>> You're right. But the executable is called 'gfortran'. I 
>>> mixed that up.
>>>
>> I have already build blas and lapack libraries using g77 
>> according to the installation hints.
>> 
>> Can I use them or must I recompile blas and lapack with 
>> gfortran ?
> 
> I'm not an expert on this subject, just sharing my 
>experiences. If you're using
> ATLAS you don't need BLAS as far as I understood. I 
>followed the instructions in
> the link I posted before. Compared to the compilation 
>time of ATLAS, LAPACK
> builds almost instantaneously, so it doesn't hurt to 
>rebuild LAPACK, I just
> don't know wether g77 built LAPACK works together with 
>gfortran ATLAS.
> At least I know, that if you're using gfrotran all the 
>time, everything works
> fine on SuSE 10.0.
> 
> Good luck, Christian
> 
Christian,


I have recompiled both blas and lapack.

There is a difference in the size of the libraries

-rw-r--r--  1 root root 7887268 2006-02-28 09:19 
libflapack.a_g77
-rw-r--r--  1 root root 7833516 2006-02-28 11:20 
libflapack.a_gfortran

-rw-r--r--  1 root root 629322 2006-02-28 11:06 
libfblas.a_g77
-rw-r--r--  1 root root 615722 2006-02-28 11:28 
libfblas.a_gfortran


Nils
  



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