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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
On Wed, 2009-01-28 at 08:04 -0600, George Liu wrote: > We plan to migrate ldm. McIDAS, and nawips decoders to RHEL 5 with > x86_64 kernels? Does anyone experience any problems of those > applications on the platforms? Thanks, > I'm just now starting to do work in 64 bit space. I've found that most programs that are compiled for 32 bits will run without modification on 64 bit systems. The problem I've found is that there are some issues with backward compatibility of some of the older shared libraries. For example, WXP compiled for 32 bit RHEL3 would not run on 64 bit RHEL5 because of missing 32 bit shared libraries. The 32 bit compile for RHEL5 worked without a problem. I'm researching this backward compatibility issue now that I have a 64 bit platform to work with. Also, problems arise when you recompile the code for 64 bits. The biggest issue is long int goes from 32 bit to 64 bit and this throws some programs off especially when reading data into data structures. I'm still doing a lot of testing to make sure my programs work when compiled for 64 bits. Luckily I haven't found anything that breaks but there is a lot of lesser used code still to test. I went out this weekend and bought an HP Dual Core E5200 system with 4GB memory and 500GB of disk for $519. I have put CentOS 5.2 on it (immediate issue with network card and audio card support) and I got it to work. I figured I'd have to spend $1000 to get that kind of system. But now I'm working out my 64 bit angst! ________________________________________________________________________ Daniel Vietor Mail: devo@xxxxxxxxxxxxx Unisys Corp Title: Engineer/Meteorologist 2476 Swedesford Rd Phone: 610-648-3623 Malvern PA 19355 Fax: 610-695-5524
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