Qt4 Preprocessor defines

[dimitri]

I don't think all of these macros need to be defined when building your own programs. For example QT_DEBUG clearly shouldn't need to be defined - from qglobal.h:

/*
   Debugging and error handling
*/
 
#if !defined(QT_NO_DEBUG) && !defined(QT_DEBUG)
#  define QT_DEBUG
#endif

/*
   Debugging and error handling
*/

#if !defined(QT_NO_DEBUG) && !defined(QT_DEBUG)
#  define QT_DEBUG
#endif

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The fact that qmake defines them doesn't necessarily mean you need them, qmake may define them because they're needed for building Qt itself.

That said, it's not a good idea for qmake to define macros that are not needed. Also it would indeed be a good idea to list all needed macros in a paragraph of the documentation. These really should be reported as a bug to Trolltech...

[Chicken Blood Machine]

The fact that qmake defines them doesn't necessarily mean you need them, qmake may define them because they're needed for building Qt itself.

Indeed.

That said, it's not a good idea for qmake to define macros that are not needed. Also it would indeed be a good idea to list all needed macros in a paragraph of the documentation. These really should be reported as a bug to Trolltech...

My sentiments entirely.