#13706: atlas spkg does not take the SAGE_ATLAS_ARCH variable into account when
SAGE_FAT_BINARY is set to 'yes'
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Reporter: tmonteil |
Owner: GeorgSWeber
Type: defect |
Status: positive_review
Priority: major |
Milestone: sage-duplicate/invalid/wontfix
Component: build |
Resolution:
Keywords: atlas, days43 denigration community management | Work
issues:
Report Upstream: N/A |
Reviewers: Volker Braun
Authors: | Merged
in:
Dependencies: |
Stopgaps:
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Comment (by jdemeyer):
Replying to [comment:8 tmonteil]:
> - "You either want a binary that runs on all reasonably old hardware for
distribution, or you want to specify the architecture in detail" -> i want
both, that is why local and global variables are made for !
I don't understand what "both" could possibly mean. How can it run on all
architectures while still being optimized for one architecture? If it
needs to run on all architectures, it cannot use Core2-specific
instructions for example, so how could be optimized for Core2?
> Currently, if i want to tune atlas for a specific old architecture, and
at the same time tell other packages not to use too recent sets of
instructions (which is coherent), i simply can not.
1) If the "specific old architecture" is the one you're building on, it's
easy: don't set any environment variable and build as usual.
2) If the "specific old architecture" is ''not'' the one you're building
on but you still don't want a generic binary: first of all, why would you
want that? But this can probably be achieved by setting specific `CFLAGS`,
although this isn't really supported.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13706#comment:11>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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