Thanks for the information, that is why I had asked. I have never really dug 
this deep into sage before, (nor software building in general)  so I am 
completely green. 

Saw this posting on macports + the output of otool -L made me think that this 
could be the problem. But I agree that it isn't likely.


--
David Monarres
dmmonar...@gmail.com

"There... I've run rings 'round you logically"
-- Monty Python's Flying Circus

On Nov 13, 2009, at 2:01 PM, William Stein wrote:

> 
> On Fri, Nov 13, 2009 at 10:01 AM, Georg S. Weber
> <georgswe...@googlemail.com> wrote:
>> 
>> 
>> 
>> On 13 Nov., 10:05, "David M. Monarres" <dmmonar...@gmail.com> wrote:
>>> Looking into the 'abort trap' problem and found
>>> 
>>> http://trac.macports.org/ticket/20491
>>> 
>>> which relates the problem to numpy linking to a system blas/atlas.
>>> 
>>> So I poked around the blas and atlas packages and noticed that they were 
>>> disabled on the Darwin platform and the wisdom of this decision was 
>>> confirmed when the numpy didn't build after I altered the packages to 
>>> build. Since macports seem to be able to get numpy + blas + atlas all 
>>> living in harmony on 10.6 I assume that sage can also.
>>> 
>>> Has anybody so far looked down this road and reached a dead end? I just 
>>> want to check to make sure that I am not barking up the wrong tree.
>>> 
> 
> I think you and I are perhaps (?) the only one who has done any work
> on this Abort Trap issue with Sage.   I don't think the problem is
> related to numpy or that thread... but I also wasn't able to solve the
> problem (yet), so don't listen to me!
> That thread you link to doesn't even mention OS X 10.6 anywhere, does
> it, and it is before 10.6 was released.  I think the error "Abort
> Trap" could arise for a billion different reasons...
> 
>>> David Monarres
>>> dmmonar...@gmail.com
> 
>> 
>> Somehow,
>> 
>> I've got the feeling that this leads in the right direction. Building
>> and integrating BLAS and ATLAS (and LAPACK ?) into the numpy from Sage
>> under Mac OS X should be doable. Does anybody know why this isn't the
>> case already?
> 
> I see no point at all in building ATLAS on OS X, since OS X already
> ships a highly tuned "Apple-certified" multi-core aware build of ATLAS
> systemwide.  The ATLAS's we build/ship with Sage are never multicore
> aware.  It's simply much better as far as I can tell for Sage to use
> the system-wide ATLAS.
> 
> Georg, you seem to have the impression above that Sage's numpy isn't
> using ATLAS.  It is -- it's just that it is using the Apple build of
> ATLAS.
> 
> William
> 
> > 


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