#11084: Singular 3-1-1-4.p4 fails to build with gcc 4.6.0.
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Reporter: drkirkby
| Owner: GeorgSWeber
Type: defect
| Status: positive_review
Priority: critical
| Milestone: sage-4.7
Component: build
| Keywords:
Author: David Kirkby
| Upstream: None of the above - read trac for reasoning.
Reviewer: AlexanderDreyer
| Merged:
Work_issues: Testing on Linux, OS X, Solaris 10 (both x86 and SPARC) with gcc
4.6.0. |
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Comment(by AlexanderDreyer):
> > > This seems to be the right solution
> >
> > I completely disagree. Dropping the optimization is at best a
workaround.
Of course, I meant a solution for now (let's call this workaround).
I also wanted to point out, that upstream Singular uses different
optimization levels for different parts of the system. Some parts are
actually compiled with -O3 (not the one which causes problems).
So I had wanted to suggest, that the spkg should not increase the
optimization level over the levels, respectively, intended by the upstream
developers. (It's known that -O3 sometimes yields performance issues.)
For some reason the Sage-package forces a unified optimization setting for
all parts of Singular. Avoiding this would be the best of course.
BTW: I'm pretty sure, the issue is a compiler bug: It complies without
problems, but the linker looks for a (C++) function, whose mangled name
doesn't fit what the linker expects.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11084#comment:21>
Sage <http://www.sagemath.org>
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