#5284: Set sage-flags.txt up to SSE2 only when building Sage in SSE2 only
mode/remove SSSE3 and SSE4 flags (followup to #5219)
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Reporter: mabshoff | Owner: mabshoff
Type: defect | Status: assigned
Priority: blocker | Milestone: sage-3.4.1
Component: distribution | Keywords:
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Description changed by mabshoff:
Old description:
> This is a followup to #5219:
>
> * When building ATLAS in SSE2 only mode the sage-flags should be set
> accordingly to avoid that Sage complains on startup.
>
> * We do not use any SSE instructions beyond PNI (i.e. SSE3) at the
> moment, yet we check for SSSE3 and SSE4 flags. So do not add them to
> sage-flags since they will trigger wrong warning.
>
> Cheers,
>
> Michael
New description:
This is a followup to #5219:
* When building ATLAS in SSE2 only mode the sage-flags should be set
accordingly to avoid that Sage complains on startup.
* We do not use any SSE instructions beyond PNI (i.e. SSE3) at the
moment, yet we check for SSSE3 and SSE4 flags. So do not add them to sage-
flags since they will trigger wrong warning.
* Document SAGE_SIMD_MODE in README.txt
Cheers,
Michael
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5284#comment:6>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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