A problem with executing Qt 4.5.0

**Dante** · 11th March 2009, 14:41

Hi people
for my first post here,I configured and made(with make command) Qt 4.5.0 on fedora core 4.but i don't know how to execute it.there is no icon or sth in desktop or in menus.
could you help?
thanks

**Boron** · 11th March 2009, 17:44

Apart from the "executables" in the bin directorie (e.g. designer or assistant) and the executables of the examples and demos, can Qt not be "executed".
You can use the Qt library for building own applications (with or without GUI).

**Dante** · 11th March 2009, 19:19

Hey let me remind that it's not Qt's librarys its the whole Qt
and if there is no difference,please tell how to use the librarys!
thanks again

**Boron** · 11th March 2009, 20:17

I suggest you start the Qt Assistant and go through the Qt tutorials in the Qt Reference Documentation.
That is a very good point to start.

Quoting from the Qt Software web page:
"Qt is a cross-platform application and UI framework. Using Qt, you can write applications once and deploy them across many desktop and embedded operating systems without rewriting the source code."

So Qt is not a program like OpenOffice. It is a compilation of libraries, documentation and supporting tools for application development.

**Dante** · 12th March 2009, 10:12

So please tell me how to access those documentations.
thanks

**lyuts** · 12th March 2009, 14:29

Let's assume you have QTDIR environment variable that holds Qt's directory. (By the way what arguments did you use to configure Qt?)

Then run $QTDIR/bin/assistant.

**Dante** · 13th March 2009, 10:57

there was no such directory QTDIR.

**lyuts** · 13th March 2009, 12:01

What is the location of your Qt installation?

**Dante** · 13th March 2009, 17:09

I just entered configure and make commands.nothing more.
I think it must be in its default place.
where is that?

**lyuts** · 13th March 2009, 17:23

Looks like /usr/local/Trolltech/Qt-4.5.0. Ok, there are two ways:
1. run /usr/local/Trolltech/Qt-4.5.0/bin/assistant
or
2. add /usr/local/Trolltech/Qt-4.5.0/bin to your PATH environment variable
add /usr/local/Trolltech/Qt-4.5.0/lib to your LD_LIBRARY_PATH environment variable
run assistant

Honestly, I would choose the 2nd way.

**Dante** · 14th March 2009, 06:02

there were no Trolltech directory,too.

**aamer4yu** · 14th March 2009, 07:29

Where had you run the configure.exe from ? Which directory ?
GO to that directory, and you will see a bin folder. Go inside that bin, and you will find assistant.exe, qtdemo.exe . Run them and follow the above posts.

**lyuts** · 14th March 2009, 09:48

aamer4yu, he is on Linux, not Windows.

**aamer4yu** · 14th March 2009, 16:04

Sorry, I am alien to linux

**Dante** · 14th March 2009, 16:20

anyway I did it and i found some files of course not .exe files but assistant and designer and some other files were there.
I double clicked one them but no answer.what should I do?
thanks

**Boron** · 15th March 2009, 10:24

Open a console window in your desktop environment (GNOME or KDE; doesn't matter), go to the directory in which you found these files, type in assistant, hit enter and see what happens.
Maybe an error message is displayed. This message would be interesting.

**Dante** · 15th March 2009, 15:44

You know,in my linux there is a Qt designer 3.3 installed by default.so when i enter assistant or designer ,it will open the Qt 3.3 version of those programs.
so i entered ./assistant but a error message came.i don't remember all of it but it had a

no such file or directory

or sth like this at the end of it.

**Dante** · 15th March 2009, 15:55

I checked it again.
the exact message is:

./assistant: error while loading shared libraries: libQtHelp.so.4: cannot open shared object file: No such file or directory

**wysota** · 15th March 2009, 17:26

I suggest you delete everything and start from scratch. Instead of trying to build Qt, which is obviously currently too difficult for you I suggest you use your distro's package manager to install Qt packages. Then you will be able to run assistant or assistant-qt4 without any additional work.