Hi everybody,

following problem:

I'm using a struct comparable to this one in my code:
Qt Code: 
  1. #ifndef STRUCT_MYPOINT
  2. 	#define STRUCT_MYPOINT
  3. 	#include <QDataStream>
  4.  
  5. 	typedef struct MyPoint {
  6. 		int x;
  7. 		int y;
  8. 	}MyPoint;
  9.  
  10. 	QDataStream &operator<<(QDataStream &out, const MyPoint &p)
  11. 	{
  12. 		out << (qint32)p.x;
  13. 		out << (qint32)p.y;
  14. 		return out;
  15. 	}
  16.  
  17. 	QDataStream &operator>>(QDataStream &in, MyPoint &p)
  18. 	{
  19. 		in >> (qint32)p.x;
  20. 		in >> (qint32)p.y;
  21. 		return in;
  22. 	}
  23. #endif
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this struct is defined in a seperate *.h file, lets say "mypoint.h"

my code works fine if I compile it with Visual Studio .Net & Qt 4.4.0

now I also try to compile my code under a linux environment using qt 4.4.0 and gcc 4.2.0

now the same code won't compile anymore.
I get a long list of errors messages, with the important ones saying

no match for 'operator>>'
no match for 'operator<<'

searched the net for some kind of solution, but haven't found one.
only thing I learned is that I must add, at least, the following lines to my code:
Qt Code: 
  1. friend Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, const MyPoint &);
  2. 	friend Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, MyPoint &);
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added these lines to my struct:

Qt Code: 
  1. #ifndef STRUCT_MYPOINT
  2. 	#define STRUCT_MYPOINT
  3. 	#include <QDataStream>
  4.  
  5. 	typedef struct MyPoint {
  6. 		int x;
  7. 		int y;
  8. 	}MyPoint;
  9.  
  10. 	QDataStream &operator<<(QDataStream &out, const MyPoint &p)
  11. 	{
  12. 		out << (qint32)p.x;
  13. 		out << (qint32)p.y;
  14. 		return out;
  15. 	}
  16.  
  17. 	QDataStream &operator>>(QDataStream &in, MyPoint &p)
  18. 	{
  19. 		in >> (qint32)p.x;
  20. 		in >> (qint32)p.y;
  21. 		return in;
  22. 	}
  23. friend Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, const MyPoint &);
  24. 	friend Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, MyPoint &);
  25. #endif
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but the problem remains.

So what am I missing/doing wrong???

greetz
darksaga