[GENERAL] hi,i write a function in postgresql source code, how to register this function?

[sunpeng]

hi,i write a function in postgresql source code, how to register this
function?
it is not an aggregate function.
i don't use 34.3"User-Defined Functions" described in
http://www.postgresql.org/docs/8.4/interactive/xfunc.html, i just write it
in postgresql sourcecode, how to register this function to let final  user
use? Should i only add one tuple in pg_process table? how to add ?
thanks!
peng