1.下载
从ftp://ftp.trolltech.com/的ftp上下载：/qt/source/qt-x11-opensource-src-4.5.3.tar.gz。
2.解压
复制qt-x11-opensource-src-4.5.3.tar.gz到/opt下
tar xvzf qt-x11-opensource-desktop-4.5.3.tar
解压后文件名为qt-x11-opensource-desktop-4.5.3，我嫌太长，改为qt-x11-4.5.3
3.安装
1）进入解压后的qt目录，运行命令 ./configure
这里./configure不加参数即采用默认安装。我这边加了两个参数-qvfb -prefix /opt/Qt-x11-4.5.3。
后面如果要安装qvfb须加上-qvfb，-prefix为改变安装目录的参数。2）运行命令 make3）运行make install
4）解决qt现版本与旧版本冲突问题 打开/etc/profile文件，在该文件的末尾加上以下语句： export PATH=/opt/qt-x11-4.5.3/bin:$PATH export QTDIR=/opt/qt-x11-4.5.3 export MANPATH=$QTDIR/man:$MANPATH export LD_LIBRARY_PATH=$QTDIR/lib:$LD_LIBRARY_PATH export QMAKESPEC=$QTDIR/mkspecs/linux-g++（如果qmake编译时候出现错误：QMAKESPEC has not
been set, so configuration cannot be deduced.Error processing project file: XXXXX.pro
就加入这一行) 保存后注销重登陆。
运行qmake -v，，显示版本4.3.4，运行designer,即启动Qt4的设计界面。 （安装目录 /opt/Qt-x11-4.5.3)
7)编译qvfb（看个人情况是否需要安装）
（在安装qt-x11，运行./configure时，须添加-qvfb参数）
# cd qt-x11-opensource-src-4.5.3/tools/qvfb/ # make 编译好的命令会在/qt-x11-4.5.3/bin目录下；
为了方便调试，可以将qvfb可执行文件复制到/usr/local/Trolltech/Qtx86-4.5.3/bin/中；
4.测试
简单测试代码：hellp.cpp
#include <qapplication.h>#include <qlabel.h> { QApplication app(argc, argv); QLabel 0); app.setActiveWindow(label); labellabelreturn app
在任意地方创建一个文件，例：hello，将hello.cpp拷贝进来。
执行qmake -project
qmake
./hello
测试成功！
5.附官方安装说明：
Installing Qt on X11 Platforms
If you have the commercial edition of Qt, install your license file as $HOME/.qt-license.
For the open source version you do not need a license file.
Unpack the archive if you have not done so already. For example, if you have the qt-x11-opensource-desktop-4.5.3.tar.gz package, type the following commands at a command line prompt: cd /tmp gunzip qt-x11-opensource-desktop-4.5.3.tar.gz # uncompress the archive tar xvf qt-x11-opensource-desktop-4.5.3.tar # unpack itThis creates the directory /tmp/qt-x11-opensource-desktop-4.5.3 containing the files from the archive. We only support the GNU version of the tar archiving utility. Note that on some systems it is called gtar.
BuildingTo configure the Qt library for your machine type, run the ./configure script in the package directory.
By default, Qt is configured for installation in the /usr/local/Trolltech/Qt-4.5.3 directory, but this can be changed by using the -prefix option.
cd /tmp/qt-x11-opensource-desktop-4.5.3 ./configureType ./configure -help to get a list of all available options.
To create the library and compile all the demos, examples, tools, and tutorials, type:
makeIf -prefix is outside the build directory, you need to install the library, demos, examples, tools, and tutorials in the appropriate place. To do this, type:
make install, as root if necessary.
Note that on some systems the make utility is named differently, e.g. gmake. The configure script tells you which make utility to use.
Note: If you later need to reconfigure and rebuild Qt from the same location, ensure that all traces of the previous configuration are removed by entering the build directory and typing make confclean before running configure again.
Environment variablesIn order to use Qt, some environment variables needs to be extended.
PATH – to locate qmake, moc and other Qt toolsThis is done like this:
In .profile (if your shell is bash, ksh, zsh or sh), add the following lines:
PATH=/usr/local/Trolltech/Qt-4.5.3/bin:$PATH export PATHIn .login (in case your shell is csh or tcsh), add the following line:
setenv PATH /usr/local/Trolltech/Qt-4.5.3/bin:$PATHIf 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-4.5.3/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 Main menu.
对困难的回答是胜利，对胜利的回答是谦逊。
