[surjan@chem.elte.hu: x86_64 fortran]

[Tim Prince]

At 04:00 AM 7/16/2004, surjan@chem.elte.hu wrote:

>  Dear Sir:
>           May I ask you if the g95 gnu project can provide us
>a (free) fortran compiler that can run on an AMD opteron 64 bit
>platform? We have tested so far the 64 bit extension of g77,
>which is nice, but cannot address large memory due to the f77
>limitations, I think. Any suggestion would be appreciated!
>
>With many thanks,
>                   Peter Surjan

I understand this list relates to the gfortran project, as g95 is not a gnu 
project.  I'll go further off topic, with a partial comment about 
g77.  g77, along with certain commercial compilers for x86-64, has a 2GB 
limit on objects such as common blocks and arrays.  That's not a g77 limit, 
as g77 for other 64-bit OS can do 4GB objects.  In either case, you can 
have multiple common blocks or arrays of maximum size, so your assertion 
that you cannot address large memory is only partly true, and certainly 
would be contested by those who sell these systems.  Other commercial 
Fortran compilers for these systems do support data objects larger than 
4GB.  I'd be interested to know what gfortran does, maybe I'll try it out.


Tim Prince