undefined reference error

[jaipal]

 undefined reference to `std::basic_ostream<char,
std::char_traits<char> >& std::__ostream_insert<char,
std::char_traits<char> >(std::basic_ostream<char,
std::char_traits<char> >&, char const*, long)'
/remote/srm269/jaipal/jai/hsim/lib/libselem.a(env.o)
(.gnu.linkonce.t._ZN11hsim_stream7WarningEv+0x18): In function
`hsim_stream::Warning()':
: undefined reference to `std::basic_ostream<char,
std::char_traits<char> >& std::__ostream_insert<char,
std::char_traits<char> >(std::basic_ostream<char,
std::char_traits<char> >&, char const*, long)'
/remote/srm269/jaipal/jai/hsim/lib/libselem.a(env.o)
(.gnu.linkonce.t._ZN11hsim_streamlsEd+0x1c): In function
`hsim_stream::operator<<(double)':
: undefined reference to `std::basic_ostream<char,
std::char_traits<char> >& std::basic_ostream<char,
std::char_traits<char> >::_M_insert<double>(double)


I am getting these errors with gcc 4.2.2. I didnt get any errors with
the previous versions