compiling and executing Qt application

Question

Iam starting learning Qt. I have this code snippet and i want to know how i can compile this and excute in gcc. Platform : Linux , gcc compiler

 1 #include <QtGui>
  2 
  3 int main(int argc, char *argv[])
  4 {
  5         QApplication app(argc, argv);
  6         QLabel label("Hello, world!");
  7         label.show();
  8 
  9         return app.exec();
 10 }

You do have the Qt Framework installed? You need more than just the g++. — HWende
– HWende, Commented May 15, 2012 at 9:12
@HWende: For this simple application only g++ as well as the QT-libraries and headers are needed. The full framework (i.e. resource compiler, meta-object compiler etc) are only needed for more advanced features. However it is good to get to know the toolchain already when starting simple (most apps will become more complicated later). — LiKao
– LiKao, Commented May 15, 2012 at 9:15

HWende · Accepted Answer · 2012-05-15 10:08:45Z

2

That is nicely explained here: http://qt-project.org/doc/qt-4.8/gettingstartedqt.html

It basically boils down to

qmake -project
qmake
make

Also I really recommend to install and use QtCreator: http://qt-project.org/downloads

edited May 15, 2012 at 10:08

answered May 15, 2012 at 9:09

HWende

1,7254 gold badges20 silver badges31 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

john Over a year ago

thanks for guidance pls explain where the executable is ...i have done make but i cudn't find executable.

HWende Over a year ago

Then something went wrong. Can you post the output you got for all three commands?

LiKao · Accepted Answer · 2012-05-15 09:11:54Z

0

In your case this is quite simple since you do not have derived any windows, buttons or other widgets.

In general for producing a QT app. you need to do the following:

Compile your annotated headers to meta-object C++ code. You do this by running the meta-object compiler (MOC).
Compile both your source files as well as the source files produced by MOC.
Link all the files together with the QT libraries.

In your case you do not need step 1 and 2, so step three is enough. Just figure out where the necessary libraries reside and link those with the compiled main.

All this is assuming you do not want to use qmake provided with QT, which automatizes the three steps.

answered May 15, 2012 at 9:11

LiKao

10.7k7 gold badges57 silver badges93 bronze badges

Collectives™ on Stack Overflow

compiling and executing Qt application

2 Answers 2

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related