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This application note explains how to build the Linux BSP from the git repositories.

1. Linux Host Requirements

Linux host requirements are as follows: Ubuntu 20.04 with the recommended amount of free space of at least 250 GB.

2. Setting Up Linux Host

  1. Prepare the Linux host for the build:

    $ sudo apt-get install gawk wget git-core diffstat unzip texinfo gcc-multilib \
     build-essential chrpath socat cpio python python3 python3-pip python3-pexpect \
     xz-utils debianutils iputils-ping libbz2-dev libz-dev python2.7 dfu-util libusb-1.0.0-dev
$ sudo dpkg-reconfigure dash # Say "No" to not use "dash" as the default system shell.
$ wget https://storage.googleapis.com/git-repo-downloads/repo
$ chmod 755 repo
$ sudo cp repo /usr/local/bin/

  2. Clone the build script:

    $ git clone -b imx-5.15-32-vb https://github.com/voxelbotics/meta-vb-imx8mp.git

  3. Checkout an appropriate release tag (e.g. 1.0.5-213):

    $ cd meta-vb-imx8mp
$ git checkout 1.0.5-213

  4. Create directories for the Yocto cache and downloads:

    $ sudo mkdir -p /home/cache/CACHE/5.15.32/sstate-cache
$ sudo mkdir -p /home/cache/CACHE/5.15.32/downloads
$ sudo chmod 777 /home/cache/CACHE/5.15.32/sstate-cache /home/cache/CACHE/5.15.32/downloads

3. Building Images

Run the build script to build the release images:

$ sh meta-vb-imx8mp/scripts/build5-15-32.sh -t 1.0.5-213
...

4. Building a Specific Release

In the above example, the script will build from the 1.0.5-213 release tag in the source repositories https://github.com/voxelbotics/meta-vb-imx8mp , https://github.com/voxelbotics/linux-imx , https://github.com/voxelbotics/u-boot-imx.

If you would like to build from the top-of-the trunk of the imx-5.15.32-vb development branches, run the script as below:

$ cd meta-vb-imx-8mp
$ git checkout imx-5.15.32-vb
$ cd ..
$ sh meta-vb-imx8mp/scripts/build5-15-32.sh -b imx-5.15.32-vb
...

5. Understanding Build Artifacts

After the build, the resultant build artifacts will be located in the build-desktop/ directory:

$ ls -l build-desktop/builddir/tmp/deploy/images/imx8mpnavq/
...
-rwxr-xr-x 1 build build   7054552 Sep 25 10:49 uuu
-rw-r--r-- 1 build build   1508656 Sep 25 10:49 imx-boot-imx8mpnavq-sd.bin-flash_evk
lrwxrwxrwx 1 build build        62 Sep 25 20:11 imx-image-desktop-ros-imx8mpnavq.wic.bz2 -> imx-image-desktop-ros-imx8mpnavq-20230109184422.rootfs.wic.bz2
...

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