[Interest] Understanding Qt Macros
masterkorp at masterkorp.net
Mon Jan 5 13:22:53 CET 2015
Excerpts from René J.V. Bertin's message of 2015-01-03 11:30:01 +0100:
> On Saturday January 03 2015 03:13:41 Alfredo Palhares wrote:
> >But qmake calls is it with all those macro definitions:
> >- QT_GUI_LIB
> >- QT_CORE_LIB
> >- QT_SHARED
> >What do these macros do ? I've tried to google the terms but no luck.
> Those are likely Qt internal macros, as Guido said. My guess is that they serve to activate select parts in the headers, depending on the application's requirements. In this case, that would be an application that uses QtGui in addition to QtCore (not sure if you can have a Qt application without that...) and that either uses Qt shared libraries (as opposed to static builds) or uses Qt classes for sharing data among applications (QSharedMemory and friends).
> As Guido also said: no need to worry about these. Or, AFAIK, about "black magic" formulas involving moc and friends ... until you're really running into failures that have no other explanation. (Which they usually will have, just as a seemingly inexplicable bug is rarely ever due to a compiler bug.)
I should have have stated this before, but I am moving the build system
from qmake to waf.
Do I still have to worry about this ? Or just moc ?
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