#11920: Sympow needs to disable fused-multiply-add and should create datafiles
------------------------------+---------------------------------------------
   Reporter:  jdemeyer        |          Owner:  tbd                            
             
       Type:  defect          |         Status:  needs_review                   
             
   Priority:  major           |      Milestone:  sage-5.0                       
             
  Component:  packages        |       Keywords:                                 
             
Work_issues:                  |       Upstream:  None of the above - read trac 
for reasoning.
   Reviewer:  Leif Leonhardy  |         Author:  Jeroen Demeyer                 
             
     Merged:                  |   Dependencies:                                 
             
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Comment(by leif):

 Replying to [comment:23 cremona]:
 > What is required of a reviewer?  I have no idea what is going on with
 these gcc issues.  But I successfully built the spkg on 4.8.alpha6 on a
 64-bit ubuntu machine;  and not being sure what the relevant things to
 test are I am testing sage/schemes/elliptic_curves since I know that some
 sympow is used in there.
 >
 > But I may be wasting my time since this is not the kind of machine on
 which there were problems, and the gcc version is 4.3.3.

 Well, in addition to the platforms where Sympow previously ''caused''
 trouble (those with [optional] non-standard floating-point and/or MAC/FMA
 instructions), the new spkg should also (still) work on more common
 platforms, so testing it on the latter doesn't hurt either.

 Perhaps you could give more details w.r.t. the processor and your Ubuntu
 version; GCC 4.3.3 smells like Ubuntu 9.04.  Otherwise -- if your time
 allows -- you could run a full test (`ptestlong`) with a recent Sage
 version and the new spkg here.

 According to `deps`, only the Sage library depends on Sympow, so you don't
 have to rebuild any other spkgs.  (You could do a `./sage -ba-force` after
 installing the new spkg, but this shouldn't be necessary.)

 [[BR]]

 I don't think there's anything we (at least me) could or should ask Mark,
 but Jeroen will know better.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11920#comment:24>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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