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Yocto for MitySOM-A10S

If you are interested in building / maintaining your own linux distribution from source for the MitySOM-A10S family, there is a Yocto compatible meta layer for the module provided at https://support.criticallink.com/gitweb/?p=meta-cl-socfpga.git;a=summary.

The current branch of the Critical Link SOCFPGA is: rocko.
The recommend Operating System for the build machine: Ubuntu 16.04

Setting up the Build Environment

In order to build the filesystem is recommended to use Ubuntu 16.04 with the following packages installed:

sudo apt-get install gawk wget git-core diffstat unzip texinfo gcc-multilib build-essential chrpath socat libsdl1.2-dev python curl libssl-dev bc python3 tig libncurses5-dev libncursesw5-dev

Setting up Yocto

Yocto is made up of multiple meta layers, these layers are stored in git repositories. To get everything setup to build, these repositories will need to be cloned and a few config files will need to be copied over.

  1. Open a terminal
  2. Clone all the needed repositories
    git clone -b rocko git://git.yoctoproject.org/poky
    cd poky
    git clone -b rocko git://git.openembedded.org/meta-openembedded
    git clone -b rocko git://git.yoctoproject.org/meta-ti
    git clone -b rocko git://support.criticallink.com/home/git/meta-cl-socfpga.git
    
  1. Source the yocto environment
    . ./oe-init-build-env
    
  2. Copy the Critical Link's Example configuration files into the build/conf
    cp ../meta-cl-socfpga/conf/bblayers.conf.sample conf/bblayers.conf
    cp ../meta-cl-socfpga/conf/local.conf.a10 conf/local.conf
    

Performing the Yocto Build

The following steps will build the filesystem that is used on the Critical Link MitySOM-A10S development kit.

  1. Open a terminal and change into the poky directory
  2. Source the yocto environment
    . ./oe-init-build-env
    
  3. Build the filesystem
    bitbake mitysom-image-base
    

After the build completes the tarball of the filesystem can be found in: ./tmp/deploy/images/mitysom-a10s/

Build the SDK

The following steps will build the SDK with the cross-compiler toolchain that is used on the Critical Link MitySOM-A10S development kit.

  1. Open a terminal and change into the poky directory
  2. Source the yocto environment
    . ./oe-init-build-env
    
  3. Build the filesystem
    bitbake mitysom-image-base -c populate_sdk
    

After the build completes the tarball of the filesystem can be found in: tmp/deploy/sdk/poky-glibc-x86_64-mitysom-image-base-cortexa9hf-neon-toolchain-2.4.3.sh

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