program will not start

[micha_eleric]

program will not start.
only indication that something happens:
12:42:00: Starting /home/micha_eleric/Qt_Creator_Projects/build-GUI-Desktop-Debug/GUI ...

first line of cout does not show, gui window does not open

int main(int argc, char **argv)
{
    std::cout << "__name__\n" << std::flush;

[micha_eleric]

well, found found out that install offline is different from install online.
installed online, clicked configure button, which is not available from off line install, and program starts, and external terminal pop ups. also terminal tab is available

[Pl45m4]

@micha_eleric said in program will not start:

program will not start.
only indication that something happens:
12:42:00: Starting /home/micha_eleric/Qt_Creator_Projects/build-GUI-Desktop-Debug/GUI ...

That's not much information...
what else is in your main code?
Do you link any libraries?
Have you cleaned your build directory already and tried again?
Does qDebug() or any other output work?

[micha_eleric]

@Pl45m4
yes, there is more code
libraries are included
the first line is a print , which shows that main does not start.
have not tried qDebug, because main never gets called. tried to run in debug, but also stops with no sign of starting.

[Pl45m4]

@micha_eleric said in program will not start:

yes, there is more code
libraries are included
the first line is a print , which shows that main does not start.

So debug your app and remove parts one after another until your program starts again.
Have you tried to clean/delete your build folder and re-build again?

[micha_eleric]

@Pl45m4 deleted everything in build folder, rebuilt, and still no run

[micha_eleric]

@Pl45m4 commentated everything but

int main(int argc, char **argv)
{
    std::cout << "__name__\n" << std::flush;
    QApplication app (argc, argv);

    return app.exec();
}

and still no print

[ChrisW67]

@micha_eleric Where are you looking for this output sent to standard out?

[micha_eleric]

@ChrisW67 should run in external terminal, but can not find Preferences

use to print in one of the tabs at bottom of qt creator, i think application output.

[ChrisW67]

@micha_eleric You mean this option:

[micha_eleric]

@ChrisW67 said in program will not start:

@micha_eleric You mean this option:

no. there is an option Preferences -> Terminal -> unclick [use internal terminal]

but can not find preference anymore, nor terminal with check box use internal terminal.

[micha_eleric]

@ChrisW67 only terminal setting i can find

[Pl45m4]

@micha_eleric said in program will not start:

no. there is an option Preferences -> Terminal -> unclick [use internal terminal]
but can not find preference anymore, nor terminal with check box use internal terminal.

???

The option @ChrisW67 showed is to toggle between QtCreator internal output pane and and extra terminal window which opens to show your output.
What terminal are you talking about?

[micha_eleric]

@Pl45m4 said in program will not start:

@micha_eleric said in program will not start:

no. there is an option Preferences -> Terminal -> unclick [use internal terminal]
but can not find preference anymore, nor terminal with check box use internal terminal.

???

The option @ChrisW67 showed is to toggle between QtCreator internal output pane and and extra terminal window which opens to show your output.
What terminal are you talking about?

both. i can only find run in terminal, not option for which terminal. either way, no terminal shows output

[ChrisW67]

@micha_eleric Which is precisely the option I showed you.

The "internal terminal" option you refer to is quite present in Qt Creator 11 and 12

That option is off by default, which means that the option I showed you will start an external terminal and launch your program in it.

If you are truly getting no output at all when you run the compiled example then it is simply failing to launch. The most likely reason for that is missing libraries. Run ldd your_executable and see what is missing. Do this outside of Qt Creator so that there are no confounding factors.

Run the program in your debugger and see what breaks.

[micha_eleric]

well, found found out that install offline is different from install online.
installed online, clicked configure button, which is not available from off line install, and program starts, and external terminal pop ups. also terminal tab is available