undefined references in std. lib functions

[Deepak Soi]

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

              1.)  undefined reference to `std::basic_string<char, 
std::char_traits<char>, std::allocator<char> >::_S_empty_rep_storage'
              2.)   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.Is there change in location of standard libs in gcc3.4       
       


thanks
Deepak