>> ===> Generating temporary packing list
>> Initializing PostgreSQL Databases - this may take a few minutes...
>> Unknown option: `-l'
>> Usage: su [ -bcdefilmnqstvVxX ] [ argument ... ].
>> *** Error code 1
I don't know what these messages are from, but they sure are not from
any code that's executed by the standard Postgres install sequence.
Postgres does not invoke su, ever.
My guess is you are trying to use some sort of platform-specific
installation script (an RPM or something like one) with the wrong kind
of platform. Try getting an unmodified Postgres tarball and installing
it per our instructions, instead. (While you're at it, I recommend
using 7.0.2, not 6.5.anything...)
regards, tom lane