Link error from libpq++ on RedHat 6.0 and Postgres 6.5.1

Hallo,

I received the following error when compiling C++ code with Postgres
6.5.1 on Red Hat 6.0 (glibc 2)
/usr/lib/libpq++.so: undefined reference to
`clone__Q2t12basic_string3ZcZt18string_char_traits1ZcZt24__default_alloc_template2b1i03Rep'

/usr/lib/libpq++.so: undefined reference to
`__dl__Q2t12basic_string3ZcZt18string_char_traits1ZcZt24__default_alloc_template2b1i03RepPv'

/usr/lib/libpq++.so: undefined reference to `__eh_pc'
collect2: ld returned 1 exit status

Some helps ?

Thanks in advance.
Claudio Cicognani
<klaudio(at)btstore(dot)com>