On Oct 31, 2008, at 8:51 AM, James Turner wrote: > > So, I can confirm that disabling hardware mip-map generation does fix > my initial issue on the 7300 GT, which is great news. Unfortunately, > my secondary issue is still present:
Great to hear that at least the first one is solved :-) > > What happens (based on earlier testing), is that the dynamic cast is > failing (returning null): > > SGReaderWriterBTGOptions *opt = new > SGReaderWriterBTGOptions(*dynamic_cast<const SGReaderWriterBTGOptions > *>(options)); > > Last time I checked, I logged the pointer address of the > SGReaderWriterBTGOptions object, and it was sane, but somehow the > dynamic cast failed. I hoped this was the GCC 4.0 bug that Tat has > previously mentioned, but I'm using GCC 4.2, and it made no change. > This is why I think there's some memory corruption going - something > is trashing the RTTI data associated with the object, is my feeling. This problem didn't happen on the iMac that I tested. So this may be a processor related issue. Could you tell me what compiler options did you specify? I wonder if this problem happens when you specify no optimization including -O, -mtune, -march, and -msse. It is also possible that changing -arch option (i386 or -arch x86_64) might help you find what's wrong. Moreover, Does this or similar thing happens on other platforms with dual Xeon? Tat ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
