Compile problem --- where to #include a missing header file?

[Angus Leeming]

Compiliation here dies in BufferView.C:

cxx: Error: box.h, line 45: #349 no operator "<<" matches these operands
            operand types are: std::ostream << char [8]
        return o << "x1,y1: " << b.x1 << "," << b.y1
-----------------^
cxx: Error: box.h, line 46: #135 namespace "std" has no member "endl"
                << " x2,y2: " << b.x2 << "," << b.y2 << std::endl;
-------------------------------------------------------------^

Where is the correct place to #include <ostream> ?

Note that box.h contians the following inlined function:

inline std::ostream & operator<<(std::ostream & o, Box & b)
{
        return o << "x1,y1: " << b.x1 << "," << b.y1
                << " x2,y2: " << b.x2 << "," << b.y2 << std::endl;
}

Does that mean that I should #include "support/LOstream.h" in box.h or in 
BufferView.C?

Angus