postgresql log file on fc2

Hi,

I am looking for the postgres log file on a stock install of fc2 (postgres
7.4 was installed from the fc2 CDs.)  I see that there is a file named
pgsql in /var/log but it is 0 bytes.  My guess is that I need to turn
logging on.  Does someone know if /var/log/pgsql on fc2 is used for
logging or something else?  In other words, can I start postgres with -l
/var/log/pgsql for logging or should I log to a differnt file?

Thanks,
Kevin