[Gm2] 64-bit code on Solaris/sparc

[john o goyo]

I have been compiling gm2 with the "-m64" option (or rather, its  
equivalent option of sparc64) in the belief that 64-bit code would be  
better on a 64-bit machine (UltraSPARC, often simply written sparc).   
I found a comment by a senior Solaris compiler writer at Oracle  
indicating that 64-bit code gives little advantage in i32lp64 models  
(which is the gm2-built-on-gcc model).  The commentary is here:   
http://www.oracle.com/technetwork/articles/servers-storage-dev/best- 
options-344699.html

So I am reconsidering the 64-bit option in favour of the 32-bit option.

john