Compiling psqlodbc on Solaris

I'm trying to install the postgres ODBC driver but I can't understand
the installation instructions.  My platform is PostgreSQL 7.4.6 on
sparc-sun-solaris2.8, compiled by GCC gcc (GCC) 3.3.  I'm using
psqlodbc-7.2.5; I don't quite get how the psqlodbc numbering is meant
to correspond to Postgres versions, so if I'm using the wrong
version, please let me know.

The instructions say I must unzip the psqlodbc tarball, then go to the
Postgres src directory and run configure-make-install.  Well, how,
exactly?  Is this telling me to rebuild Postgres with the psqlodbc
directories included under the main Postgres source tree?  I already
have a running Postgres installation; I simply want to add the odbc
driver.  Can I do that?  If so, how do I compile the psqlodbc source
without recompiling all of Postgres?  Any help would be tremendously
appreciated.

nishad
--
"Underneath the concrete, the dream is still alive" -- Talking Heads