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==Introduction==
This is a quickstart guide to build Yocto BSP for DIVA SOM, to rebuild the binaries (U-Boot, Linux kernel, root file systems images and the associated SDKs system) provided with the DIVELK releases with the Yocto build system.
For more information regarding the Yocto build system, go to its [[:Category:Yocto|dedicated category page]]
== Build System system prerequisites ==
DIVELK MVM is already configured to build this Yocto version/configuration, however, users typically don't use a VirtualBox VM for Yocto builds for performance reasons.
You can refer to [http://www.yoctoproject.org/docs/1.8/mega-manual/mega-manual.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.
== Build Building the root file system images and the SDKs DIVELK Yocto BSP ==
=== Toolchain ===
</pre>
=== Run Build the build process 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)
