[Interest] Understanding Qt Macros

[Francisco Ares]

2015-01-05 10:22 GMT-02:00 Alfredo Palhares <masterkorp at masterkorp.net>:

> 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 ?
>
> --
> Regards,
> Alfredo Palhares
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Try this:  http://doc.qt.io/qt-5/qmake-manual.html

Best Regards,
Francisco
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