Re: c function - undefined symbols

Steffn <steffn@gmx.at> writes:
> Thanks for your reply. Yes, thats also my suspicion. But what library to
> include?

There is no library to include --- you need to be building *your* code
as a library that can be loaded into the Postgres backend, which will
supply the missing function.  This is somewhat platform-specific and
frankly I'd suggest using pgxs rather than puzzling it out for yourself.
See
http://www.postgresql.org/docs/8.3/static/xfunc-c.html#XFUNC-C-PGXS

            regards, tom lane