Setting up cross compiling environment & Qt/X11 ... - Bytemark Hosting

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1 About this document This documents describes how to set up a cross compiling environment for the DX4 using the ELKD cross compiler. The whole environment is set up using the Ubuntu 32Bit Linux distribution. Additionally there are two ways described to use QtCreator and Eclipse to cross compile an application for the DX4. With Eclipse it is also possible to remote launch the application from within the IDE on the DX4. Anders Electronics provides a completely set up Ubuntu 10.04 32 Bit within a VirtualBox virtual machine. 2 Revision History Revision Date Changes A 24/07/2012 • Initial version B 27/07/2012 • Added a lot of pictures • Added a chapter on how to copy files to the DX4 3 Conventions All kinds of code and file snippets are shown like the line below. This is a code line If there is a $ at the beginning like in the line below, this means that this is a command to be executed in a terminal as a normal user. $ user command If there is a # in front of the line it is a command to be executed as root (super user): # root command All names from menues, folders and file names are written in italic. When commands have to be split in multiple lines it looks like this: export PATH=/opt/eldk5.2.1/armv7a/sysroots/i686eldklinux/ usr/bin/armv7avfpneonlinuxgnueabi/:$PATH 4 Setting up ELDK Install an Ubuntu 10.04 LTS, 32 Bit system on a computer or a virtual machine. This will probably also work with other distributions. It is recommended to use 10.04 LTS because there where problems with Drag&Drop in the Qt integration for Eclipse when using Ubuntu 12.04 LTS. Make sure all updates are installed. Download the ELDK iso file for armv7a from http://ftp.denx.de/pub/eldk/. For example: http://ftp.denx.de/pub/eldk/5.2.1/iso/eldk-5.2.1-armv7a.iso This mirror can be used alternatively because the denx.de server seems to be very slow: http://ftpstud.hs-esslingen.de/pub/Mirrors/eldk/ Extract the iso file to a folder like /home/anders/eldk-5.2.1. Open a terminal and go to the directory where you put the installer: $ cd eldk5.2.1 2/20
Make sure that the installer script is executable: $ chmod +x install.sh Install the ELDK: $ ./install.sh armv7a He asks for the user password to get root privileges and then he will install the ELDK into /opt/eldk-5.2.1/armv7a/. It is possible to install the ELDK into a different directory, see $ ./install help for more information. Now you have to set up some environment variables that are required to use the cross compiler. Add this at the end of your .profile file in the users home directory. It may be required to modify it to the version number and paths according to the version of ELDK you are using (there are no spaces in the lines!). export PATH=/opt/eldk5.2.1/armv7a/sysroots/i686eldklinux/usr/bin/armv7avfpneonlinuxgnueabi/:$PATH export PATH=/opt/eldk5.2.1/armv7a/sysroots/i686eldklinux/usr/bin/:$PATH export ARCH=arm export PKG_CONFIG_PATH="/opt/eldk5.2.1/armv7a/sysroots/i686eldklinux/usr/lib/pkgconfig" export PKG_CONFIG_SYSROOT_DIR="/opt/eldk5.2.1/armv7a/sysroots/i686eldklinux" export CROSS_COMPILE=armlinuxgnueabi You will need to log off and on again that the changes will take effect. Now the basic cross compiling environment is set up. To compile a simple C program you type $ ${CROSS_COMPILE}gcc o hello hello.c 5 Eclipse An more comfortable way of cross compiling is Eclipse. Besides the basic features you get from an IDE like syntax highlighting and automatic makefile generation Eclipse also provides functions for a remote launch of your application. 5.1 Install Eclipse Before you can install Eclipse you have to make sure that you have installed a Java Runtime Environment. Open a Terminal and execute this command: $ aptget install defaultjre Now go to http://www.eclipse.org/downloads/ and download the Eclipse Classic version for Linux 32Bit. Extract the archive to your desktop. Start Eclipse by executing the file called eclipse in the extracted folder. Go the Help → Install new Software and add a new Repository by clicking on Add on the top right of the window. Call it CDT and use this link: http://download.eclipse.org/tools/cdt/releases/juno This path may be adjusted, when you are not using Eclipse Juno. Click OK to add the new repository. 3/20
Page 1: Setting up cross compiling environm
Page 5 and 6: Set a name for the project, we will
Page 7 and 8: Compile the program by hitting the
Page 9 and 10: Right click on the connection and s
Page 11 and 12: Go the the Debugger tab. In the are
Page 13 and 14: Qt/embedded which doesn't need a X
Page 15 and 16: QMAKE_CXXFLAGS += Wnopsabi 6.2.
Page 17 and 18: Enter a name for the project, I wil
Page 19 and 20: 7 Running an application After you

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