To simplify the situation, lets say that there are 2 files: core.cpp and main.cpp.
core.cpp contains the functionality of the program and main.cpp contains the basic main() implementation.
I want Qt (using qmake and the .pro files) to
core.a and then main.cpp to build main.exe. How do I set this up in the qmake file?
Filesystem layout:
MyProject
|_ myproject.pro
|_ core
|_ core.cpp
|_ core.h
|_ core.pro
|_ app
|_ main.cpp
|_ app.pro
myproject.pro:
TEMPLATE = subdirs
CONFIG += ordered
SUBDIRS = core \
app
app.depends = core
core.pro:
TEMPLATE = lib
CONFIG += staticlib
HEADERS = core.h
SOURCES = core.cpp
app.pro:
TEMPLATE = app
SOURCES = main.cpp
LIBS += -L../core -lcore
TARGET = ../app-exe # move executable one dire up
core.h includes something from a particular Qt library, e.g. QT += websockets? We don't want app.pro to have to declare explicit dependencies on libraries that are only pulled in indirectly.. - Thomas 2016-08-31 09:24
If you are utilizing resources in your static library you should import them in your application as well. Q_INIT_RESOURCE is the way of importing a resource file into the application.
Assume that you have a resources file with file name as myResources.qrc in static library. Then, you should initialize this in the app as given below:
QApplication a(argc, argv);
Q_INIT_RESOURCE(resources); //Magic is here.
MainWindow w;
w.show();
a.exec();
The .pro file might be modified as given below for the great example given by Masci:
TEMPLATE = lib
CONFIG += staticlib
HEADERS = core.h
SOURCES = core.cpp
RESOURCES += myResources.qrc
Failed to start program. Path or permissions wrong?. How do i fix this? (It apparently is looking for the executable in the base directory - chacham15 2012-04-05 22:38