diff options
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/usermanual/chapters/common_use_cases.xml | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/docs/usermanual/chapters/common_use_cases.xml b/docs/usermanual/chapters/common_use_cases.xml index 2c693c681c..1407304ec9 100644 --- a/docs/usermanual/chapters/common_use_cases.xml +++ b/docs/usermanual/chapters/common_use_cases.xml @@ -511,8 +511,118 @@ SDK_SUFFIX = "toolchain-YOUR" <note>SDK creation currently does not work with the <emphasis>DISTRO</emphasis> set to <emphasis>micro</emphasis>.</note> + + <note>If the environment-setup script packaged in the SDK should + require more environment look at the <filename>meta-toolchain-qte.bb</filename> + to accomplish this.</note> </section> </section> + </section> + + <section> + <title>Creating and Using a Qt Embedded SDK</title> + + <section> + <title>Creating the SDK</title> + + <para>The SDK should contain a build of Qt Embedded, but also + optional depedencies like directFB, glib-2.0, gstreamer-0.10, tslib + and more esoteric depedencies like mysql and postgres. This allows + developers to simply start developing using Qt and enables system + integrators to easily recompile Qt and base libraries without tracking + down extra depedencies. + </para> + + <para>OpenEmbedded provides an easy way to create a Qt Embedded + SDK. In + <filename>recipes/tasks/task-qte-toolchain-host.bb</filename> host + tools like moc, uic, rcc, qmake will get installed and in <filename> + recipes/tasks/task-qte-toolchain-target.bb</filename> the Qt4 header + files and libraries will be installed. + </para> + <para>To build the SDK, setup OpenEmbedded in the usual way by picking + a <emphasis>DISTRO</emphasis> and <emphasis>MACHINE</emphasis>. Issue + the below command and after the operation finished you should find + a SDK in the deployment directory. +<screen> +# bitbake meta-toolchain-qte +</screen> + </para> + + <note>The deployment directory depends on the distribution and used + C library. In the case of Angstrom and glibc it is located in + <filename>tmp/deploy/glibc/sdk</filename>.</note> + + <note>Change <filename>qt4-embedded.inc</filename> and + <filename>qt4.inc</filename> for using different Qt configuration + flags. This might include a custom qconfig.h to produce a reduced + size build.</note> + + <note>When distributing the SDK make sure to include a written offer + to provide the sourcecode of GPL licensed applications or provide + parts of the <filename>sources</filename> folder. The <filename> + sources</filename> folder is located right next to the <filename>sdk</filename> + one.</note> + </section> + + + <section> + <title>Using the Qt Embedded SDK</title> + + <para>In this example we are assuming that the target hardware + is an armv5t system and the SDK targets the Angstrom Distribution. You + should start by downloading the SDK and untar it to the root folder + (<filename>/</filename>). Once this operation is finished you will + find a new directory <filename>/usr/local/angstrom/arm/</filename> and + it contains the <filename>environment-setup</filename> to setup the + <emphasis>QMAKESPEC</emphasis> and various other paths. + </para> + +<screen> +Untar the SDK once +# tar -C / -xjf angstrom-armv5te-linux-gnueabi-toolchain-qte.tar.bz2 + +Before using it source the environment +# . /usr/local/angstrom/arm/environment-setup + +Use qmake2 to build software for the target +# qmake2 +</screen> + + <para>Creating and building a simple example. We will create a simple + Qt Embedded application and use <command>qmake2</command> and + <command>make</command> to cross compile. + +<screen> +# . /usr/local/angstrom/arm/environment-setup +# cd $HOME +# mkdir qte-example +# cd qte-example + +# echo "TEMPLATE=app +SOURCES=main.cpp +" > qte-example.pro + +# echo '#include <QApplication> +#include <QPushButton> + +int main(int argc, char** argv) { + QApplication app(argc, argv); + + QPushButton btn("Hello World"); + btn.show(); + btn.showMaximized(); + + return app.exec(); +} +' > main.cpp + +# qmake2 +# make +</screen> + </para> + + </section> </section> </chapter> |