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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:FDL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Free Documentation License
** Alternatively, this file may be used under the terms of the GNU Free
** Documentation License version 1.3 as published by the Free Software
** Foundation and appearing in the file included in the packaging of this
** file.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
/*!
\page qt-embedded-install.html
\title Installing Qt on Embedded Linux
\ingroup qt-embedded-linux
\ingroup installation
\brief How to install Qt on Embedded Linux.
This document describes how to install \l{Qt for Embedded Linux} in your
development environment:
\tableofcontents
Please see the \l{Cross-Compiling Qt for Embedded Linux Applications}{cross
compiling} and \l{Deploying Qt for Embedded Linux Applications}{deployment}
documentation for details on how to install \l{Qt for Embedded Linux} on
your target device.
Note also that this installation procedure is written for Linux,
and that it may need to be modified for other platforms.
\section1 Step 1: Installing the License File (commercial editions only)
If you have the commercial edition of \l{Qt for Embedded Linux}, the first step
is to install your license file as \c $HOME/.qt-license.
For the open source version you do not need a license file.
\section1 Step 2: Unpacking the Archive
First uncompress the archive in the preferred location, then
unpack it:
\snippet doc/src/snippets/code/doc_src_emb-install.qdoc 0
This document assumes that the archive is unpacked in the
following directory:
\snippet doc/src/snippets/code/doc_src_emb-install.qdoc 1
\section1 Step 3: Building the Library
Before building the \l{Qt for Embedded Linux} library, run the \c
./configure script to configure the library for your development
architecture. You can list all of the configuration system's
options by typing
\snippet doc/src/snippets/code/doc_src_emb-install.qdoc embedded help
Note that by default, \l{Qt for Embedded Linux} is configured for
installation in the \c{/usr/local/Trolltech/QtEmbedded-%VERSION%}
directory, but this can be changed by using the \c{-prefix}
option. Alternatively, the \c{-prefix-install} option can be used
to specify a "local" installation within the source directory.
The configuration system is also designed to allow you to specify
your platform architecture:
\snippet doc/src/snippets/code/doc_src_emb-install.qdoc 2
In general, all Linux systems which have framebuffer support can
use the \c generic architecture. Other typical architectures are
\c x86, \c arm and \c mips.
\note If you want to build Qt for Embedded Linux for use with a virtual
framebuffer, pass the \c{-qvfb} option to the \c configure
script.
To create the library and compile all the demos, examples, tools,
and tutorials, type:
\snippet doc/src/snippets/code/doc_src_emb-install.qdoc 3
On some systems the \c make utility is named differently, e.g. \c
gmake. The \c configure script tells you which \c make utility to
use.
If you did not configure \l{Qt for Embedded Linux} using the \c{-prefix-install}
option, you need to install the library, demos, examples, tools,
and tutorials in the appropriate place. To do this, type:
\snippet doc/src/snippets/code/doc_src_emb-install.qdoc 4
and enter the root password.
\note You can use the \c INSTALL_ROOT environment variable to specify
the location of the installed files when invoking \c{make install}.
\section1 Step 4: Adjusting the Environment Variables
In order to use \l{Qt for Embedded Linux}, the \c PATH variable must be extended
to locate \c qmake, \c moc and other \l{Qt for Embedded Linux} tools, and the \c
LD_LIBRARY_PATH must be extended for compilers that do not support
\c rpath.
To set the \c PATH variable, add the following lines to your \c
.profile file if your shell is bash, ksh, zsh or sh:
\snippet doc/src/snippets/code/doc_src_emb-install.qdoc 5
In case your shell is csh or tcsh, add the following line to the
\c .login file instead:
\snippet doc/src/snippets/code/doc_src_emb-install.qdoc 6
If you use a different shell, please modify your environment
variables accordingly.
For compilers that do not support \c rpath you must also extend
the \c LD_LIBRARY_PATH environment variable to include
\c /usr/local/Trolltech/QtEmbedded-%VERSION%/lib. Note that on Linux
with GCC, this step is not needed.
\section1 Step 5: Building the Virtual Framebuffer
For development and debugging, \l{Qt for Embedded Linux} provides a virtual
framebuffer as well as the option of running \l{Qt for Embedded Linux} as a VNC
server. For a description of how to install the virtual
framebuffer and how to use the VNC protocol, please consult the
documentation at:
\list
\o \l {The Virtual Framebuffer}
\o \l {The VNC Protocol and Qt for Embedded Linux}
\endlist
Note that the virtual framebuffer requires a Qt for X11
installation. See \l {Installing Qt on X11 Platforms} for details.
The Linux framebuffer, on the other hand, is enabled by default on
all modern Linux distributions. For information on older versions,
see \l http://en.tldp.org/HOWTO/Framebuffer-HOWTO.html. To test
that the Linux framebuffer is set up correctly, use the program
provided by the \l {Testing the Linux Framebuffer} document.
That's all. \l{Qt for Embedded Linux} is now installed.
\table 100%
\row
\o
\bold {Customizing the Qt for Embedded Linux Library}
When building embedded applications on low-powered devices,
reducing the memory and CPU requirements is important.
A number of options tuning the library's performance are
available. But the most direct way of saving resources is to
fine-tune the set of Qt features that is compiled. It is also
possible to make use of accelerated graphics hardware.
\list
\o \l {Fine-Tuning Features in Qt}
\o \l {Qt Performance Tuning}
\o \l {Adding an Accelerated Graphics Driver to Qt for Embedded Linux}
\endlist
\endtable
*/
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