Run Qt in Linux

laozeng1982

Hi, experts,

I am facing a problem, I wrote a program, it was OK on my development machine.

But When I put it on a test machine, it can be run, but no GUI shows up when I using a normal account. If I changed to the ROOT user, everything is fine.

What I missed? I thought my test environment is the same as the development environment. Same OS and same LD_LIBIRARY_PATH, etc...

Please help me. Thanks a lot~

JonB

@laozeng1982
You are supposed to deploy your application from development to another machine, e.g. with linuxdeployqt.

Nobody will be able to answer why a second machine seems to require root user instead of normal one from the description you have given. If you have not done so already, run your application from a terminal/command prompt on the second machine and see whether there is maybe some diagnostic output written to it when you invoke the Qt application.

laozeng1982

Thanks for your reply.

I do run the program in second machine in terminal, but no more information output, even my debug output in the program I wrote not display in the terminal.

Do we have a method to get the output by Qt application with setting some envioronment variables?

Another question, I tried use the linuxdeployqt to depoly my program, but it seems not functionly work, it says my GLIBC is too high. But I have to run my program on RHEL 7.9.

Thanks

laozeng1982

@JonB

Hi, I mean use the ldd command to locate all the libs I need, so I can run it by ROOT, no libs error.

When I run the program in terminal, it didn't say any issues about lib.

JonB

@laozeng1982
Write a one program which just creates a QWIdget and show()s it before app.exec(). Try that. Find out whether no Qt program runs or whether it's something in your actual application.