Hi,

The attached source makes use of the "long long" type which is defined by the
compiler. Unfortunately there's no specialization of stream input and output
operators for "long long":

$ cat > foo.cc
#include <iostream>
using namespace std;
int main() {
  long long i;
  cout << i << endl;
}
$ 
$ g++ foo.cc
foo.cc: In function `int main()':
foo.cc:5: error: ambiguous overload for 'operator<<' in 'std::cout << i'
/usr/local/include/c++/3.3.4/bits/ostream.tcc:63: error: candidates are:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(std::basic_ostream<_CharT,
   _Traits>&(*)(std::basic_ostream<_CharT, _Traits>&)) [with _CharT = char,
   _Traits = std::char_traits<char>] <near match>
/usr/local/include/c++/3.3.4/bits/ostream.tcc:74: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(std::basic_ios<_CharT,
   _Traits>&(*)(std::basic_ios<_CharT, _Traits>&)) [with _CharT = char, _Traits
   = std::char_traits<char>] <near match>
/usr/local/include/c++/3.3.4/bits/ostream.tcc:86: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(std::ios_base&(*)(std::ios_base&)) [with _CharT = char,
   _Traits = std::char_traits<char>] <near match>
/usr/local/include/c++/3.3.4/bits/ostream.tcc:122: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(long int) [with _CharT = char, _Traits =
   std::char_traits<char>]
/usr/local/include/c++/3.3.4/bits/ostream.tcc:156: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(long unsigned int) [with _CharT = char, _Traits =
   std::char_traits<char>]
/usr/local/include/c++/3.3.4/bits/ostream.tcc:98: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(bool) [with _CharT = char, _Traits =
   std::char_traits<char>]
/usr/local/include/c++/3.3.4/ostream:178: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(short int) [with _CharT = char, _Traits =
   std::char_traits<char>]
/usr/local/include/c++/3.3.4/ostream:189: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(short unsigned int) [with _CharT = char, _Traits =
   std::char_traits<char>]
/usr/local/include/c++/3.3.4/ostream:193: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(int) [with _CharT = char, _Traits =
   std::char_traits<char>]
/usr/local/include/c++/3.3.4/ostream:204: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(unsigned int) [with _CharT = char, _Traits =
   std::char_traits<char>]
/usr/local/include/c++/3.3.4/bits/ostream.tcc:241: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(double) [with _CharT = char, _Traits =
   std::char_traits<char>]
/usr/local/include/c++/3.3.4/ostream:219: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(float) [with _CharT = char, _Traits =
   std::char_traits<char>]
/usr/local/include/c++/3.3.4/bits/ostream.tcc:265: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(long double) [with _CharT = char, _Traits =
   std::char_traits<char>]
/usr/local/include/c++/3.3.4/bits/ostream.tcc:289: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(const void*) [with _CharT = char, _Traits =
   std::char_traits<char>] <near match>
/usr/local/include/c++/3.3.4/bits/ostream.tcc:313: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(std::basic_streambuf<_CharT, _Traits>*) [with _CharT =
   char, _Traits = std::char_traits<char>] <near match>
/usr/local/include/c++/3.3.4/ostream:436: error:
   std::basic_ostream<_CharT, _Traits>&
   std::operator<<(std::basic_ostream<_CharT, _Traits>&, char) [with _CharT =
   char, _Traits = std::char_traits<char>]
/usr/local/include/c++/3.3.4/bits/ostream.tcc:512: error:
   std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char,
   _Traits>&, char) [with _Traits = std::char_traits<char>]
/usr/local/include/c++/3.3.4/ostream:447: error:
   std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char,
   _Traits>&, signed char) [with _Traits = std::char_traits<char>]
/usr/local/include/c++/3.3.4/ostream:452: error:
   std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char,
   _Traits>&, unsigned char) [with _Traits = std::char_traits<char>]
/usr/local/include/c++/3.3.4/bits/ostream.tcc:572: error:
   std::basic_ostream<_CharT, _Traits>&
   std::operator<<(std::basic_ostream<_CharT, _Traits>&, const char*) [with
   _CharT = char, _Traits = std::char_traits<char>] <near match>
/usr/local/include/c++/3.3.4/bits/ostream.tcc:616: error:
   std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char,
   _Traits>&, const char*) [with _Traits = std::char_traits<char>] <near match>
/usr/local/include/c++/3.3.4/ostream:486: error:
   std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char,
   _Traits>&, const signed char*) [with _Traits = std::char_traits<char>] <near
   match>
/usr/local/include/c++/3.3.4/ostream:491: error:
   std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char,
   _Traits>&, const unsigned char*) [with _Traits = std::char_traits<char>]
   <near match>
$ 


That's because in header files <istream> and <ostream> the relevant functions
are protected by _GLIBCPP_USE_LONG_LONG:

	#ifdef _GLIBCPP_USE_LONG_LONG
	      __istream_type& 
 	     operator>>(long long& __n);
	
 	     __istream_type& 
 	     operator>>(unsigned long long& __n);
	#endif

and:

	#ifdef _GLIBCPP_USE_LONG_LONG
	      __ostream_type& 
	      operator<<(long long __n);
	
	      __ostream_type& 
	      operator<<(unsigned long long __n);
	#endif

Why is _GLIBCPP_USE_LONG_LONG not defined on Tru64? Type "long long" is legal
and distinct from "long". SHouldn't it be defined?