what are options -DQT_NO_DEBUG -DQT_SHARED -DQT_THREAD_SUPPORT used for?

[Pushpa Kumari K.H]

what are options -DQT_NO_DEBUG -DQT_SHARED -DQT_THREAD_SUPPORT used for?

[e8johan]

QT_NO_DEBUG means that the build is without debugging support. This results in a smaller executable.

QT_SHARED means that Qt is not statically linked (to the executable?)

QT_THREAD_SUPPORT means that Qt is build with supports for threading.

[thgis]

Thanks for the clearification
So a followup question: who are these options for? I cant find a -D option in make and so far also not in qmake.

[BalaQT]

They will be generated in makefile

hope it clarifies your doubt,
Bala