Accessing libq functions from UDF (shared library)

Hi all,

I am trying to create a User-defined function(UDF) which takes filename
as input.. the function reads the file containig sql queries and
executes them in background using libq functions (PGconnectDb, PQexec
etc..).

I was able to sucessfully compile the code and create a shared library.
This is my makefile:
top_builddir = ../../..
include $(top_builddir)/src/Makefile.global

SERVER_INCLUDES += -I $(shell pg_config --includedir)
SERVER_INCLUDES += -I $(shell pg_config --includedir-server)

CFLAGS += -g $(SERVER_INCLUDES)

.SUFFIXES: .so

.c.so:
$(CC) $(CFLAGS) -fpic -c $<
$(CC) $(CFLAGS) -shared -o $@ $(basename $<).o

But when i tried creating a UDF using 'CREATE OR REPLACE FUNCTION' , i
get the following error:

--> ERROR: Could not load library: .../pgsql/lib/mylib.so : undefined
symbol PGConnectdb

My LD_LIBRARY_PATH is set to point to <...>/pgsql/lib dirctory (which
contains all the libarary files needed...)..

$> ldd mylib.so gives the following output:

libc.so.6 => /lib/tls/libc.so.6/
/lib/ld-linux.so.2

Am i missing something?

Would really appreciate any help in this regard.

Thanks in advance,
Gayathri TK