bulding with qmake on Linux - how to prevent qmake from linking to QtCore and QtGui

Question

I have a shared library (with no QT dependency) [library B] that links to another shared library (with no QT dependence as well) [library A].

I am using Qmake and QT Creator 1.3. The problem is that when I build library B and run ldd on the executable, it is being linked to QtCore and QtGui, both of which are pulling in lots of unrequired files, resulting in an executable that is taking long to load, and has unwanted dependencies.

I have tried just about everything to stop qmake from linking these libraries to library B.

A snippet of my project file for library B is shown below:

TEMPLATE = lib
LIBS += -L../datelib/bin -ldatelib_release

QT -= gui core
LIBS   -= -lQtGui -lQtCore
CONFIG += dll
CONFIG += debug_and_release

CONFIG(debug, debug|release) {
TARGET =targetnameD
}else {
TARGET = targetname
}

I am using QtCreator 3 on Ubuntu 9.10

QT is version 4.5.2

Answer 1

You can try with

CONFIG += dll
QT     -= gui core
LIBS   -= -lQtGui -lQtCore

Answer 2

As far as I know, Qt creator doesn't take the .pro configurations into consideration if you don't have them set up separately from the IDE.

You should go to the project's settings, clone the debug configuration, rename it release, set the QMake build configuration to release(!) and change other settings as you see fit. Then you can pick which configuration to build from the IDE.

P.S: Try using Qt Creator 1.3.1 as it fixes a lot of bugs and brings interesting new features.

Answer 3

Put CONFIG -= qt in your .pro file.