What is the correct way to write this macro in C++/Qt?

Question

Qt

In general, there is such a primitive overlap construction
#ifdef QT_DEBUG
#define __DEBUG(A, B) qDebug() << PLACE(A) << B;
#else
#define __DEBUG(A, B)
#endif
Its essence is that if you compile the project in debug mode, then the macro works and the corresponding value is substituted, but if you compile in Release mode, then the macro does not substitute anything. Question: how to correctly implement such a construction without varnings?
/defines.h:55: warning: "__DEBUG" redefined [enabled by default]
#define __DEBUG(A, B) qDebug() << PLACE(A) << B;

Answer 1

For example like this:

#undef __DEBUG
#ifdef QT_DEBUG
#define __DEBUG(A, B) qDebug() << PLACE(A) << B;
#else
#define __DEBUG(A, B)
#endif