I haven't committed the PG documentation to memory, so I don't recall the
command to report the EXT directory with which the 'configure' script was
executed, but it's embedded in the postgres binaries. I run dual-boot, so
I don't have access to my Linux install at the moment.
You can test the architecture of binaries with the 'file' command. Generally,
if the package doesn't have "64" in it, it isn't 64-bit, but there are scores of
naming conventions (which is precisely why I always build my own PG binaries
from source).
- V