#17650: alarm broken on cygwin
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Reporter: gouezel | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.5
Component: porting: Cygwin | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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On cygwin64, the alarm mechanism is broken:
{{{
sage: alarm(0.1); sum(xrange(100000000))
4999999950000000
}}}
instead of the expected interrupt.
This seems to be a subtle cygwin and/or ppl bug: the included header
ppl.hh contains lines akin to
{{{
class Parma_Polyhedra_Library::Init {
public:
Init();
~Init();
...
}
static Parma_Polyhedra_Library::Init Parma_Polyhedra_Library_initializer;
}}}
The methods `Init()` and `~Init()` are never defined in the header, so
there are undefined references in the ppl library. This confuses
cython(?), breaking `alarm`.
Replacing the above lines with
{{{
Init() {};
~Init() {};
}}}
solves the alarm issue.
--
Ticket URL: <http://trac.sagemath.org/ticket/17650>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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