[SciPy-User] [SciPy-user] ATLAS install has no effect

Ian Goodfellow ia3n@stanford....
Fri Mar 12 03:16:03 CST 2010


Actually, David (Cournapeau), I started off by installing your rpms  
linked at the top of the "Fedora Core 8, openSUSE 10.2, RHEL/Centos 5"  
section, so you're probably the perfect person to answer this. Should  
your rpm installation work with ATLAS or do I need to build numpy from  
source?
Are there any instructions for building atlas from the ashigabou  
repository and then building numpy to use it?
Thanks,
Ian
On Mar 12, 2010, at 12:05 AM, David Cournapeau wrote:

> David Warde-Farley wrote:
>> On 11-Mar-10, at 4:37 PM, Ian Goodfellow wrote:
>>
>>> Sure, that's a good call to know about. It looks like it's not using
>>> the same setting for library_dirs as what's in my LD_LIBRARY_PATH.
>>
>> LD_LIBRARY_PATH would need to have been set at build time, not just  
>> at
>> run time.
>
> Not exactly: LD_LIBRARY_PATH only change the loader path (that is  
> which
> shared libraries are loaded when a process is started, as well as  
> dlopen).
>
>> AFAIK NumPy will only link ATLAS in statically (I could be
>> wrong about this).
>
> Atlas may be linked dynamically as well.
>
> On debian, ATLAS is packaged such as it also contains a full blas/ 
> lapack
> library, that is -llapack -lblas will link against ATLAS library. In
> particular, you can linked against conventional, slow, blas/lapack  
> when
> building, and switching to a faster, ATLAS-enabled one - but this is
> debian specific, and not supported out of the box by the ATLAS build
> system. You can of course emulate what debian does by yourself if you
> know what you are doing.
>
> cheers,
>
> David
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