#11227: gcc-4.6.0 optimization bug with cliquer-1.2.p7.spkg
---------------------------------------------------------------+------------
Reporter: mariah | Owner:
mariah
Type: defect | Status:
needs_review
Priority: blocker | Milestone:
sage-4.7
Component: packages | Resolution:
Keywords: cliquer spkg | Work_issues:
Upstream: Reported upstream. Developers acknowledge bug. | Reviewer:
Mariah Lenox
Author: Jeroen Demeyer | Merged:
Dependencies: |
---------------------------------------------------------------+------------
Changes (by jdemeyer):
* keywords: cliquer => cliquer spkg
* status: new => needs_review
Old description:
> On various 64-bit x86_64 Linux machines (for example, the Skynet machine
> eno), sage-4.7.alpha5 built with gcc-4.6.0 fails various tests with a
> timeout:
>
> {{{
> sage -t -long -force_lib devel/sage/sage/graphs/graph_generators.py #
> Time out
> sage -t -long -force_lib devel/sage/sage/graphs/graph_coloring.py # Time
> out
> sage -t -long -force_lib devel/sage/sage/graphs/graph.py # Time out
> sage -t -long -force_lib devel/sage/sage/graphs/cliquer.pyx # Time out
> }}}
>
> The problem can be seen by executing the following command, which should
> take milliseconds but simply hangs instead:
> {{{
> sage: clique_number(Graph({0:[1,2,3], 1:[2], 3:[0,1]}))
> }}}
>
> New spkg adding flag `-fno-ivopts`:
> [http://boxen.math.washington.edu/home/jdemeyer/spkg/cliquer-1.2.p8.spkg]
>
> For other gcc 4.6.0 specific problems see #11216.
New description:
On various 64-bit x86_64 Linux machines (for example, the Skynet machine
eno), sage-4.7.alpha5 built with gcc-4.6.0 fails various tests with a
timeout:
{{{
sage -t -long -force_lib devel/sage/sage/graphs/graph_generators.py #
Time out
sage -t -long -force_lib devel/sage/sage/graphs/graph_coloring.py # Time
out
sage -t -long -force_lib devel/sage/sage/graphs/graph.py # Time out
sage -t -long -force_lib devel/sage/sage/graphs/cliquer.pyx # Time out
}}}
The problem can be seen by executing the following command, which should
take milliseconds but simply hangs instead:
{{{
sage: clique_number(Graph({0:[1,2,3], 1:[2], 3:[0,1]}))
}}}
New spkg adding flag `-fno-ivopts`:
[http://boxen.math.washington.edu/home/jdemeyer/spkg/cliquer-1.2.p9.spkg]
For other gcc 4.6.0 specific problems see #11216.
--
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11227#comment:13>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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