is there any missing ??

# ./configure --prefix=/usr/local/pgsql --with-python
# make
# make install
# adduser postgres
# mkdir /usr/local/pgsql/data
# chown postgres /usr/local/pgsql/data
# su postgres
% /usr/local/pgsql/bin/initdb -D /usr/local/pgsql/data
% /usr/local/pgsql/bin/pg_ctl -D /usr/local/pgsql/data -l
/usr/local/pgsql/pg_start.log start
%/usr/local/pgsql/bin/createlang plpython template1
createlang: language installation failed: ERROR:  unsupported language
"plpython"
HINT:  The supported languages are listed in the pg_pltemplate system
catalog.
%
i there any missing ???
i have configured python lib
my box is using freebsd 5.0, python 2.4.2, postgresql-8.1.2
thank you all for your kinness