getting undefined references using gcc3.4

[Deepak Soi]

Hi,
      I am getting lot of undefined references using gcc3.4 as      

                 undefined reference to `std::basic_string<char, 
std::char_traits<char>, std::allocator<char> >::_S_empty_rep_storage'
                 cppmsg.o(.text+0x755): undefined reference to 
`std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)

Can you please let me know the reason of this problem.I shall be 
thankful.               
 My earlier problem of pasting two token together was solved.gcc2-9 
gives warning on pasting two invalid tokens whereas gcc3.4 gives error.

thanks
Deepak