#19797: Build GSL in IEEE 754 compliant mode
----------------------------------+----------------------------------
Reporter: jdemeyer | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-7.0
Component: packages: standard | Keywords:
Merged in: | Authors: Jeroen Demeyer
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies: #19796
Stopgaps: |
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The following can happen on some hardware architectures due to fused
multiply-add instructions:
{{{
sage: x = CDF(0.99, 0.2)
sage: x * x.conj()
1.0201 + 1.1102230246251575e-19*I
}}}
It's annoying because it causes doctest failures, for example
{{{
sage -t --long --warn-long 62.3 src/sage/symbolic/expression.pyx
**********************************************************************
File "src/sage/symbolic/expression.pyx", line 11105, in
sage.symbolic.expression.Expression._plot_fast_callable
Failed example:
plot(s)
Expected:
Graphics object consisting of 1 graphics primitive
Got:
Graphics object consisting of 0 graphics primitives
**********************************************************************
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/19797>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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