Warnings using stringstream

[Tron Thomas]

The following program generates warnings when compiled with the GNU C++ 
compiler for Linux:

#include <iostream>
#include <sstream>

int main()
{
   std::stringstream stream;

   stream << "This is a test.\n";

   std::cout << stream.str();

   return 0;
}

These are the warnings it produces:

In file included from TestStream.cpp:2:
/usr/include/g++-3/sstream:260: warning: default argument given for 
parameter 3 of `streampos
stringbuf::seekoff (long long int, ios::seek_dir, int = 3)'
/usr/include/g++-3/sstream:83: warning: after previous specification in
`streampos stringbuf::seekoff (long long int, ios::seek_dir, int = 3)'
/usr/include/g++-3/sstream:278: warning: default argument given for 
parameter 2 of `streampos
stringbuf::seekpos (long long int, int = 3)'
/usr/include/g++-3/sstream:84: warning: after previous specification in
`streampos stringbuf::seekpos (long long int, int = 3)'

These warnings do not make any sense to me.  I have never encountered 
any problems like this using std::stringstream with any other compiler. 
Are these warnings bogus?  Is this a bug with the compiler's STL?

I am using RedHat Linux 7.2 (Intel) and version 2.96 of the GNU C++ 
compiler.