Developing Qt applications
This recipe will show how to build, run, and debug a graphical Qt application using Qt Creator.
Getting ready
Before launching Qt Creator, we check whether we are able to build and launch a Qt application manually. We will build a Qt hello world application.
Here is the code for qt_hello_world.cpp
:
#include <QApplication> #include <QPushButton> int main(int argc, char *argv[]) { QApplication app(argc, argv); QPushButton hello("Hello world!"); hello.show(); return app.exec(); }
To build it, we use the meta-toolchain-qt
installed as described previously:
$ source /opt/poky/1.7.1/environment-setup-cortexa9hf-vfp-neon-poky- linux-gnueabi $ qmake -project $ qmake $ make
This uses qmake
to create a project file and a Makefile
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