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Installing Qt/X11

If you have the commercial edition of Qt, install your license file as $HOME/.qt-license.
For the open source version you do not need a license file.
Unpack the archive if you have not done so already. For example, if you have the qt-x11-opensource-desktop-4.1.0.tar.gz package, type the following commands at a command line prompt:
```
    cd /tmp
    gunzip qt-x11-opensource-desktop-4.1.0.tar.gz        # uncompress the archive
    tar xvf qt-x11-opensource-desktop-4.1.0.tar          # unpack it
```
This creates the directory /tmp/qt-x11-opensource-desktop-4.1.0 containing the files from the archive. We only support the GNU version of the tar archiving utility. Note that on some systems it is called gtar.
Building
To configure the Qt library for your machine type:
```
    cd /tmp/qt-x11-opensource-desktop-4.1.0
    ./configure
```
Type ./configure -help to get a list of all available options.

To create the library and compile all the demos, examples, tools, and tutorials, type:
```
    make
```
To install the library, demos, examples, tools, and tutorials, type:
```
    su -c "make install"
```
and enter the root password. Qt is by default installed into /usr/local/Trolltech/Qt-4.1.0 but this can be changed by using the -prefix parameter.

Note that on some systems the make utility is called differently, e.g. gmake. The configure script tells you which make utility to use.
Environment variables
In order to use Qt, some environment variables needs to be extended.
```
    PATH               - to locate qmake, moc and other Qt tools
```
This is done like this:

In .profile (if your shell is bash, ksh, zsh or sh), add the following lines:
```
    PATH=/usr/local/Trolltech/Qt-4.1.0/bin:$PATH
    export PATH
```
In .login (in case your shell is csh or tcsh), add the following line:
```
    setenv PATH /usr/local/Trolltech/Qt-4.1.0/bin:$PATH
```
If you use a different shell, please modify your environment variables accordingly.

For compilers that do not support rpath you must also extended the LD_LIBRARY_PATH environment variable to include /usr/local/Trolltech/Qt-4.1.0/lib. On Linux with GCC this step is not needed.
That's all. Qt is now installed.
If you are new to Qt, we suggest that you take a look at the demos and examples to see Qt in action. Run the Qt Examples and Demos either by typing qtdemo on the command line or through the desktop's Start menu.

You might also want to try the following links:

We hope you will enjoy using Qt. Good luck!

Trademarks

Qt 4.1.0