[Solved] Qt paths in qmake / .pro

[DerekDomino]

Hello,

I'm using QDebug in debug mode and skipping it in release mode. I would like to avoid linking to Qt libraries for this project.

In the .pro I've completed the INCLUDEPATH so that QDebug(.h) is found
@
release {
DEFINES += QT_NO_DEBUG_OUTPUT QT_NO_DEBUG
CONFIG -= qt
INCLUDEPATH += "......\QtSDK\Desktop\Qt\4.8.0\include" "......\QtSDK\Desktop\Qt\4.8.0\include\QtCore"
}
@

It works well! Dependency Walker indicates that the executable generated does not depend on Qt dll's.

The next step is to make this configuration cleaner:

How to specify in a portable manner the path of the Qt include path?

I would like to replace
@ INCLUDEPATH += "......\QtSDK\Desktop\Qt\4.8.0\include" "......\QtSDK\Desktop\Qt\4.8.0\include\QtCore" @

by something like
@ INCLUDES += qt_include @

to avoid refering to a particular installation path of the SDK that depends on the OS and the machine.

Thanks

[sierdzio]

Why do you need this Qt in includepath? Just don't use it at all. For a debug build, wrap include in a ifdef:
@
#ifdef DEBUG
#include <QtDebug>
#endif
@

Or is it not working?

[DerekDomino]

Hi Sierdzio,

Thanks! It should be working but I have tens of "#include <QDebug>" and hundreds "qDebug() << ..." and having to test if DEBUG is defined at each call is cumbersome.

[miroslav]

It looks to me like you always want to include the QDebug header, but not link the Qt library in release mode. So you do not want to wrap "#include <QDebug>" in a define.

The QMake variable QMAKE_INCDIR_QT may be of help. It should point to ......\QtSDK\Desktop\Qt\4.8.0\include in your case. Try adding

@
INCLUDEPATH += $$QMAKE_INCDIR_QT $$QMAKE_INCDIR_QT/QtCore
@

to get rid of the hard-coded paths.

[DerekDomino]

Fantastic, it works perfectly. Thanks!

So the code looks (changed the conditional test)

@
CONFIG(release, debug|release) { #release mode only
DEFINES += QT_NO_DEBUG_OUTPUT QT_NO_DEBUG
CONFIG -= qt
INCLUDEPATH += $$QMAKE_INCDIR_QT $$QMAKE_INCDIR_QT/QtCore
}
@

Marked thread as [Solved] :-)

Thanks!

[miroslav]

Excellent ;-)