Error linking C++ code.

I've problems using postgres with c++

I use postgresql 6.3.2, egcs-c++-1.1b, and the following comand when
compiling the code bellow

gcc -c -o lml.o lml_prueba.cc -I/usr/include/g++ -I/usr/include/pgsql
-L/usr/lib/pgsql -lpq -lpq++ -lstdc++

link give me these errors:

/usr/lib/libpq++.so: undefined reference to
`clone__Q2t12basic_string3ZcZt18string_char_traits1ZcZt24__default_alloc_templat
e2b
1i03Rep'
/usr/lib/libpq++.so: undefined reference to
`__dl__Q2t12basic_string3ZcZt18string_char_traits1ZcZt24__default_alloc_template
2b1
i03RepPv'
/usr/lib/libpq++.so: undefined reference to `__eh_pc'
collect2: ld returned 1 exit status

Can't anybody help me?

Regards.

Code:
-------------------------------------------------------------------------------
/*
Autor: Manuel de Vega Barreiro
primera prueba de acceso a postgres usando c++
version: 0.1- 280499
*/

#include <iostream.h>
#include <libpq++.h>

int main ()
{
cout << "Conexion correcta" <<endl;
PgDatabase data("lml");

if (data.ConnectionBad() ){
cout << "Fallo en la conexion..." <<endl;
cout << "Codigo de error: " << data.ErrorMessage() <<endl;
return 1;
}else{
cout << "Conexion correcta" <<endl;
}
}
----------------------------------------------------------------------------

Manuel de Vega Barreiro. barreiro(at)arrakis(dot)es En un lugar de la red
Madrid. Espaa. de cuyo nombre no quiero
http://www.croftj.net/~barreiro Linux Landia acordarme..........