Hi Ivan, > When I went to upgrade atlas, I found it claiming it would be compiling for > the G4 architecture (ppc) on a G5 (ppc64) machine, and that it would lead to > inferior performance. I do not recall seeing this on previous > install/upgrades of atlas. Does atlas have support for the G5 architecture? > If it does, what is preventing it from compiling for a G5? Does anyone know > of a workaround? I'm on a G5, obviously, with MacPorts 1.9.2, and gcc 4.4.6.
I wrote a G5 support (ppc64) for Atlas, but it was difficult to debug. At a certain point in time, somebody pointed out that G5 floating point performance was not so different from G4, and that 64-bit instructions would fill the cache more quickly and maybe result in inferior performance. That's why I quit the ppc64 idea and fused both into a single ppc option. But if somebody is able to settle the G4/G5 dispute with definitive data about FP computing, I'll be happy to try to raise the ppc64 options from the deads. Vincent _______________________________________________ macports-users mailing list macports-users@lists.macosforge.org http://lists.macosforge.org/mailman/listinfo.cgi/macports-users
