I tried your suggestions but failed to run the codes. For example, I compiled MM5 on Xenon and transported them to opteron for a trial run, which failed. The Xenon machine runs on redHat Linux 9 whilst the opteron sits on federa linux. Both have pgi 5.2-4 fortran.
While it is interesting to compare xenon and amd, but I am most concerned with compiling and running mm5 codes. I encountered quite a bit of problems. First, I have some problem with NCAR Graphics. Then I tried to compile the MM5/TERRAIN module without ncargraphics. The compilation apparently succeeded but the codes always fail with segmentation fault. Can you help?
Best regards