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Building the Yocto BSP (XELK)

135 bytes removed, 08:57, 6 November 2017
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===Introduction===
This is a quickstart guide to build Yocto BSP for Axel SOMs, to rebuild the binaries (U-Boot, Linux kernel, root file system) provided with XELK releases.
For more information regarding Yocto build system, go to its [[:Category:Yocto|dedicated category page]]
=== Build System prerequisites ===
Please read the [http:XELK MVM is already configured to build this Yocto version//www.yoctoproject.org/docs/latest/mega-manual/mega-manual.html#getting-setup configuration, however, users typically don't use a VirtualBox VM for Yocto manual setup section] builds for a list of supported Linux distribution and their configurationperformance reasons.
DAVE Embedded System uses a standard Ubuntu 12You can refer to [http://www.yoctoproject.org/docs/1.048/mega-manual/mega-manual.4 LTS Server 64 bit html#yp-resources Yocto manual setup section] for a list of supported Linux distribution and their configuration to create your own build environment on your favorite distribution plus the following additional packages:.
<pre class="workstation-terminal">$ sudo apt-get install gawk wget git-core diffstat unzip texinfo gcc-multilib \ build-essential chrpath socat libsdl1.2-dev xterm</pre> === Build AXEL the XELK Yocto BSP ===
==== Initialize the build environment ====
AXEL XELK Yocto BSP uses [https://code.google.com/p/git-repo/ git-repo] tool to fetch all the required git repositories to build
<pre class="workstation-terminal">
dvdk@dvdk-vm:~/axel$ ./repo init -u git@git.dave.eu:axel/axel-bsp.git -b axel-krogoth
dvdk@dvdk-vm:~/axel$ ./repo sync
dvdk@dvdk-vm:~/axel$ DISTRO=fsl-imx-x11 MACHINE=imx6qxelk source axel-setup-release.sh -b build-x11
dvdk@dvdk-vm:~/axel/build$ bitbake axel-image-x11
</pre>
==== Build the Yocto BSP image ====
Please note that even the basic root file system requires a few hours to build on a mid-/hi range desktop (4-6 cores, 8-12 GiB RAM) also depending on your Internet connection speed (all sources are fetched from the network). Nearly 20GiB of disk space is required for the build. Moreover, building inside the DVDK adds some overhead, since the performances of a virtual machine are reduced if compared to the physical hardware. Thus, it's recommended to check the hardware capabilities of the host system and, when building with Yocto is required, developers should consider the following options:
* migrating the build system to a physical machine
* assuming that the host system has the required resources, extending the hardware capabilities of the default DVDK (eg: adding more cores and disk space)
<pre class="workstation-terminal">
dvdk@dvdk-vm:~/xelkaxel$ DISTRO=fsl-imx-x11 MACHINE=imx6qxelk source axel-bspsetup-init-envrelease.sh -b build-x11dvdk@dvdk-vm:~/xelkaxel/build$ bitbake baseaxel-rootfsimage-imagex11
</pre>
Again, replace <code><target-image-name></code> with one of the images listed in [[#Quick reference|here]].
==== Build additional packages ====
To build additional packages the user must first enter the directory where the axel-bsp-init-env.sh is placed and source it
<pre class="workstation-terminal">
dvdk@dvdk-vm:~/xelkaxel$ DISTRO=fsl-imx-x11 MACHINE=imx6qxelk source axel-bspsetup-init-envrelease.sh -b build-x11dvdk@dvdk-vm:~/xelkaxel/build$
</pre>
And then he can run any of the [[http://www.yoctoproject.org/docs/latest/mega-manual/mega-manual.html#usingpoky-components-bitbake bitbake]] commandcommands.
<pre class="workstation-terminal">
</pre>
The resulting packages (the default format is ipk) can be found inside ''build/tmp/deploy/ipkrpm''.
<pre class="workstation-terminal">
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