[Aurora-sparc-user] My machine is 64 bit, but does it think it is 32 bit?

[Stephen Ware]

Hi Aurora group!

I've just recently downloaded Aurora and installed it on some old Sun
Ultra 10's at my school in the hopes of making them into a cluster.
The program I want to compile and run is called GAMESS, which is a
quantum chemistry program that can run in parallel.  Because there is
no pre-compiled version for SPARC, I am building it from source.  In
the configuration process, I have to choose several options based on
the operating system of the computer.  My first instinct was to choose
"64 bit linux" since the Ultra 10 is a 64 bit machine, but as I was
reading around online about other SPARC linux ports, I realized that
perhaps some applications are running in 32 mode.  GAMESS is mostly
fortran with a tiny bit of C, and I am compiling it from the command
line.  Should I choose the 64 bit options, or the 32 bit option?

Thanks very much,
Stephen