Bug 197941
| Summary: | OpenSceneGraph fails on 3ds files | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Rene van Paassen <m.m.vanpaassen> |
| Component: | OpenSceneGraph | Assignee: | Ralf Corsepius <rc040203> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 5 | CC: | extras-qa |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | 1.2-1.fc5 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2006-12-01 05:26:22 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
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Description
Rene van Paassen
2006-07-07 14:49:28 UTC
I can reproduce the "TriangleIntersect" bug, I can not confirm your observation on g++. For me, using gcc-4.1.1-6, the "TriangleIntersect" bug is reproducable with both "-g" and ".g -O2". I am inclined to think the cause is a real functional/algorithmic bug in OSG, causing divisions by zero (the nans in your log above). I learned something in the meantime. The problem is strict aliasing rules. Adding the option -fno-strict-aliasing creates a workable RPM. Of course, this is not a permanent solution, but for now it will do. Also OpenSceneGraph 1.1 has the problem. Proposed change to spec file: # Propagate RPM_OPT_FLAGS echo "OPTF = $RPM_OPT_FLAGS -fno-strict-aliasing" >> $dir/Make/makedefs (In reply to comment #2) > I learned something in the meantime. Thanks for reminding me about his PR, I already had almost forgotten about it :( > The problem is strict aliasing rules. Hmm, -fstrict-aliasing is a fairly popular excuse, these days. In 90% of all cases, I have been struggling with it [1], in the end, the cause had been something else and not -fstrict-aliasing ;) [1] I am currently struggling with it in another project > Adding the option -fno-strict-aliasing > creates a workable RPM. Of course, this is not a permanent solution, > but for now > it will do. Also OpenSceneGraph 1.1 So, am I correct in presuming you tried it? Which architecture and which version of Fedora are you currently using? I'll try to reproduce your issue on fc6/i386 and check if -fno-strict-aliases fixes it ... If yes, I'll probably apply your "hack". (In reply to comment #3) > Which architecture and which version of Fedora are you currently using? > > I'll try to reproduce your issue on fc6/i386 and check if -fno-strict-aliases > fixes it ... If yes, I'll probably apply your "hack". I can't reproduce the original problem with terrain.3ds w/ OpenSceneGraph-1.2 on fc6/i386. So either this issue must have been fixed in GCC or in OpenSceneGraph-1.2. Réné should you be using FC5, could you try to rebuild FE6's OpenSceneGraph-1.2 rpm and try to reproduce the error (I don't have a system running FC5 anymore)? If this should fix your issue, I would be willing to take the plunge and upgrade fc5 to OpenSceneGraph-1.2, a step I so far had hesitated to do. Have rebuilt the fc6 OpenSceneGraph-1.2 for fc5, and bug is indeed gone. I would say go ahead and create an fc5 OpenSceneGraph-1.2 (In reply to comment #5) > Have rebuilt the fc6 OpenSceneGraph-1.2 for fc5, and bug is indeed gone. I would > say go ahead and create an fc5 OpenSceneGraph-1.2 OK, I went ahead and pushed OpenSceneGraph-1.2 into fc5 ;) |