Tutorial on setting up the QT platform environment

QT PlatformThis document describes how to build an environment.QT PlatformThis article provides a detailed description of the application.QT PlatformFor more information, see the detailed description.

Embedded/QT Platform Construction

You can download the free version of the Embedded/Qt platform provided by Trolltech on its website. The files to be downloaded already exist in this experiment directory, before the experiment, copy the three files used in this experiment to the/root/pxa270Qt directory. The following steps assume that you are operating on the/root/pxa270Qt platform.

1. Unzip the installation package and set Environment Variables

1) install Tmake

 
 

  
  
cd~/pxa270Qt  
  
  
tar–xzftmake-1.13.tar.gz  
  
  
exportTMAKEDIR=$PWD/tmake-1.13 
 
 

2) install Qt2.3.2

 
 

  
  
cd~/pxa270Qt  
  
  
tar–xzfqt-x11-2.3.2.tar.gz  
  
  
exportQT2DIR=$PWD/qt-2.3.2 
 
 

3) install Qt/Embedded

 
 

  
  
cd~/pxa270Qt  
  
  
tar–xzfqt-embedded-2.3.10-free.tar.gz  
  
  
exportQTEDIR=$PWD/qt-2.3.10 
 
 

The setting of environment variables is very important. It is related to whether these installation packages can be correctly installed and compiled. The following describes these environment variables:

TMAKEDIR: indicates the Tmake tool used to compile Qt/Embedded.

QT2DIR: a folder pointing to a Qt-X112.3.2

QTEDIR: a folder pointing to a Qt-Embedded2.3.10

2. Compile Qt/Embedded

1) BuildQt2.3.2

 
 

  
  
cd$QT2DIR  
  
  
exportTMAKEPATH=$TMAKEDIR/lib/linux-g++  
  
  
exportQTDIR=$QT2DIR  
  
  
exportPATH=$QTDIR/bin:$PATH  
  
  
exportLD_LIBRARY_PATH=$QTDIR/lib:$LD_LIBRARY_PATH  
  
  
./configure-no-xft  
  
  
 
  
  
make  
  
  
 
  
  
mkdir$QTEDIR/bin  
  
  
cpbin/uic$QTEDIR/bin 
 
 

. /Configure is used to configure Qt. It includes many options, such as adding "-no-opengl". To learn more, enter. /configure -- help to get more help information. After compilation, copy the generated/bin/uic to the new directory bin under $ QTEDIR, because this tool will be used in subsequent compilation of Qt/Embedded.

2) BuildQvfb

 
 

  
  
exportTMAKEPATH=$TMAKEDIR/lib/linux-g++  
  
  
exportQTDIR=$QT2DIR  
  
  
exportPATH=$QTDIR/bin:$PATH  
  
  
exportLD_LIBRARY_PATH=$QTDIR/lib:$LD_LIBRARY_PATH  
  
  
cd$QTEDIR/tools/qvfb  
  
  
tmake-oMakefileqvfb.pro  
  
  
 
  
  
make  
  
  
 
  
  
mvqvfb$QTEDIR/bin/ 
 
 

In this step, buildqvfb creates a link to the static library from Qt/Embedded2.3.10 to Qt2.3.2. The qvfb tool is used to generate Virtualframebuffer, which is a very useful tool that can simulate the display on the development board. If there is no problem running in Virtualframebuffer, it can be directly run on the Development Board through cross-compilation.

3) BuildQt/Embedded

 
 

  
  
cd$QTEDIR  
  
  
exportTMAKEPATH=$TMAKEDIR/lib/qws/linux-x86-g++  
  
  
exportQTDIR=$QTEDIR  
  
  
exportPATH=$QTDIR/bin:$PATH  
  
  
exportLD_LIBRARY_PATH=$QTDIR/lib:$LD_LIBRARY_PATH  
  
  
./configure-no-xft-qvfb-depths4,8,16,32  
  
  
make 
 
 

In the configuration. in/configure,-qvfb is used to support Virtualframebuffer,-depths4, 8, 16, and 32. It supports 4-bit, 8-bit, 16-bit, and 32-bit display depth, in addition, you can add jpeg and-gif files such as-syestem-jpeg to support jpeg and gif files. The Configuration System also supports adding System Options for specific platforms. However, generally, any Linux system that supports framebuffer can use the "linux-generic-g ++" platform. You can run the./configure -- help Command to view detailed configuration information.

3. View running results

View the running result. If the above steps are successfully compiled, you can view the running result by running the demo that comes with Qt/Embedded.

Run on the framebuffer of the host machine:

 
 

  
  
cd$QTEDIR/examples/launcher  
  
  
./launcher-qws 
 
 

Run on Virtualframebuffer:

 
 

  
  
exportQTDIR=$QTEDIR  
  
  
exportPATH=$QTEDIR/bin:$PATH  
  
  
exportLD_LIBRARY_PATH=$QTEDIR/lib:$QT2DIR/lib:$LD_LIBRARY_PATH  
  
  
cd$QTEDIR/examples/launcher  
  
  
qvfb-width640-height480&  
  
  
sleep10  
  
  
./launcher-qws 
 
 

The running result is as follows:

Figure 7-1Qt/EmbeddedDemo

After completing the above steps, we have already established and developed it on the local machine.Qt PlatformApplication environment.

Summary:

QT PlatformThe environment setup tutorial is complete.QT PlatformWe hope everyone can help you build the environment.