OpenEmbedded Build Instructions

Revision: 20 Published: 2020-09-07

These instructions are for building ROS 2 dashing, eloquent, and foxy and ROS 1 melodic using OpenEmbedded release series thud (Yocto 2.6), warrior (Yocto 2.7), zeus (Yocto 3.0), dunfell (Yocto 3.1), or the yet to be released gatesgarth (Yocto 3.2) on a 64-bit build machine running Ubuntu bionic (18.04). There is also support for building images for the TurtleBot 3 Waffle Pi under ROS 1 melodic. The build machine should be a workstation-class PC with a minimum of 8 GB memory and ~100GB of free space, ideally on a separate SSD disk; however, the more processors and memory the build machine has, the faster the builds will be.

An overview of OpenEmbedded/Yocto can be found in the Yocto Project Overview and Concepts Manual.

Additional information on meta-ros can be found in Superflore OE Recipe Generation Scheme.

Build Environment Setup

Install these prerequisites once on the build machine (a workstation-class host PC running 64-bit Ubuntu bionic):

sudo apt-get install gawk wget git-core diffstat unzip texinfo gcc-multilib \
        build-essential chrpath socat cpio python python3-pip python3-pexpect \
        xz-utils debianutils iputils-ping \
        python3-git python3-jinja2 libegl1-mesa libsdl1.2-dev xterm \
        g++-multilib locales lsb-release python3-distutils time
sudo locale-gen en_US.utf8

Setup bitbake and OpenEmbedded using a separate disk for the build artifacts (~100GB required if the working files are kept). NOTE: This can only be done in a new directory. To update an existing project, see Usage Notes below.

mkdir "<NEW-PROJECT-DIR>"
cd "<NEW-PROJECT-DIR>"

git clone -b build --single-branch [email protected]:ros/meta-ros build
mkdir conf
ln -snf ../conf build/.

# Clone the OpenEmbedded metadata layers and generate conf/bblayers.conf . Select a configuration based on the OpenEmbedded
# DISTRO (ros1, ros2, or webos), the ROS distro (melodic, dashing, or eloquent), and the OpenEmbedded release series (thud,
# warrior, zeus, dunfell, or gatesgarth) that you wish to build:
#
# distro=ros1
# distro=ros2
# distro=webos (oe_release_series=thud only)
#
# ros_distro=melodic
# ros_distro=dashing
# ros_distro=eloquent
# ros_distro=foxy
#
# oe_release_series=thud
# oe_release_series=warrior
# oe_release_series=zeus
# oe_release_series=dunfell
# oe_release_series=gatesgarth

cfg=$distro-$ros_distro-$oe_release_series.mcf
cp build/files/$cfg conf/.
build/scripts/mcf -f conf/$cfg

# Set up the shell environment for this build and create a conf/local.conf . We expect all of the variables below to be unset.
unset BDIR BITBAKEDIR BUILDDIR OECORELAYERCONF OECORELOCALCONF OECORENOTESCONF OEROOT TEMPLATECONF
source openembedded-core/oe-init-build-env

# The current directory is now the build directory; return to the original.
cd -

# An OpenEmbedded build produces a number of types of build artifacts, some of which can be shared between builds for
# different OpenEmbedded DISTRO-s and ROS distros. Create a common artifacts directory on the separate disk under which all
# the build artifacts will be placed. The edits to conf/local.conf done below will set TMPDIR to be a subdirectory of it.
mkdir -p "<ABSOLUTE-PATH-TO-DIRECTORY-ON-SEPARATE-DISK>"

Add this to the bottom of conf/local.conf:

# ROS-ADDITIONS-BEGIN
# ^^^^^^^^^^^^^^^^^^^ In the future, tools will expect to find this line.

# Increment the minor version whenever you add or change a setting in this file.
ROS_LOCAL_CONF_SETTINGS_VERSION := "2.2"

# If not using mcf, replace ${MCF_DISTRO} with the DISTRO being used.
DISTRO ?= "${MCF_DISTRO}"

# If not using mcf, set ROS_DISTRO in conf/bblayers.conf .

# The list of supported values of MACHINE is found in the Machines[] array in the .mcf file for the selected configuration.
# Use ?= so that a value set in the environment will override the one set here.
MACHINE ?= "<SUPPORTED-MACHINE>"

# Can remove if DISTRO is "webos". If not using mcf, replace ${MCF_OPENEMBEDDED_VERSION} with the version of OpenEmbedded
# being used. See the comments in files/ros*.mcf for its format.
ROS_DISTRO_VERSION_APPEND ?= "+${MCF_OPENEMBEDDED_VERSION}"

# Can remove if DISTRO is not "webos". If not using mcf, replace ${MCF_WEBOS_BUILD_NUMBER} with the build number of webOS OSE
# being used.
ROS_WEBOS_DISTRO_VERSION_APPEND ?= ".${MCF_WEBOS_BUILD_NUMBER}"

ROS_OE_RELEASE_SERIES_SUFFIX ?= "-${ROS_OE_RELEASE_SERIES}"
# Because of a bug in OpenEmbedded, <ABSOLUTE-PATH-TO-DIRECTORY-ON-SEPARATE-DISK> can not be a symlink.
ROS_COMMON_ARTIFACTS ?= "<ABSOLUTE-PATH-TO-DIRECTORY-ON-SEPARATE-DISK>"

# Set the directories where downloads, shared-state, and the output from the build are placed to be on the separate disk.
DL_DIR ?= "${ROS_COMMON_ARTIFACTS}/downloads"
SSTATE_DIR ?= "${ROS_COMMON_ARTIFACTS}/sstate-cache${ROS_OE_RELEASE_SERIES_SUFFIX}"
TMPDIR ?= "${ROS_COMMON_ARTIFACTS}/BUILD-${DISTRO}-${ROS_DISTRO}${ROS_OE_RELEASE_SERIES_SUFFIX}"
# Don't add the libc variant suffix to TMPDIR.
TCLIBCAPPEND := ""

# As recommended by https://www.yoctoproject.org/docs/latest/mega-manual/mega-manual.html#var-BB_NUMBER_THREADS
# and https://www.yoctoproject.org/docs/latest/mega-manual/mega-manual.html#var-PARALLEL_MAKE:
BB_NUMBER_THREADS ?= "${@min(int(bb.utils.cpu_count()), 20)}"
PARALLEL_MAKE ?= "-j ${BB_NUMBER_THREADS}"

# Reduce the size of the build artifacts by removing the working files under TMPDIR/work. Comment this out to preserve them
# (see https://www.yoctoproject.org/docs/latest/mega-manual/mega-manual.html#ref-classes-rm-work).
INHERIT += "rm_work"


# Any other additions to the file go here.

# EXTRA_IMAGE_FEATURES is just one of the many settings that can be placed in this file. You can find them all by searching
# https://www.yoctoproject.org/docs/latest/mega-manual/mega-manual.html#ref-variables-glossary for "local.conf".

# Uncomment to allow "root" to ssh into the device. Not needed for images with webOS OSE because it implicitly adds this
# feature.
# EXTRA_IMAGE_FEATURES += "ssh-server-dropbear"

# Uncomment to include the package management utilities in the image ("opkg", by default). Not needed for images with
# webOS OSE because it implicitly adds this feature.
# EXTRA_IMAGE_FEATURES += "package-management"

# Uncomment to have all interactive shells implicitly source "setup.sh" (ROS 1) or "ros_setup.sh" (ROS 2).
# EXTRA_IMAGE_FEATURES += "ros-implicit-workspace"

# Uncomment to display additional useful variables in the build configuration output.
# require conf/distro/include/ros-useful-buildcfg-vars.inc

# vvvvvvvvvvvvvvvvv In the future, tools will expect to find this line.
# ROS-ADDITIONS-END

Building Images

Various WARNING-s will be issued by bitbake when building these images. They can be ignored. After a successful build of an image, it can be found under TMPDIR/deploy/images/MACHINE.

ROS 1 and ROS 2 Images

These images can be built when one of ros[12]-*.mcf was chosen for the configuration:

1. `ros-image-core`

This image contains just the ROS "core".

source openembedded-core/oe-init-build-env
cd -
bitbake ros-image-core

To include additional packages in this image, append them to the IMAGE_INSTALL variable in conf/local.conf:

IMAGE_INSTALL_append_pn-ros-image-core = " <PKG1> <PKG2> ..."

Note that the leading space after the opening double-quote is mandatory. See Customizing Images Using local.conf for more information.

2. `ros-image-world`

This image contains all packages from a ROS distro that currently build and can be included in an image without conflicts. To include more when using warrior or zeus, add DISTRO_FEATURES_append = " opengl" to your conf/local.conf.

source openembedded-core/oe-init-build-env
cd -
bitbake ros-image-world

3. `ros-image-turtlebot3-core` (ROS 1 melodic only)

This image contains the packages required for the core TurtleBot 3 operation listed here and here.

If using warrior or zeus, add DISTRO_FEATURES_append = " opengl" to your conf/local.conf

Note that this is not needed, because the images use root for their user account.)`.

source openembedded-core/oe-init-build-env
cd -
bitbake ros-image-turtlebot3-core

To include additional packages in this image, append them to the IMAGE_INSTALL variable in conf/local.conf:

IMAGE_INSTALL_append_pn-ros-image-turtlebot3-core = " <PKG1> <PKG2> ..."

4. `ros-image-turtlebot3-all` (ROS 1 melodic only)

By default, this webOS OSE image contains all of the non-simulation related turtlebot3- prefixed packages and their prerequisities mentioned in the TurtleBot3 e-Manual.

If using warrior or zeus, add DISTRO_FEATURES_append = " opengl" to your conf/local.conf

Note that this is not needed, because the images use root for their user account.)

source openembedded-core/oe-init-build-env
cd -
bitbake ros-image-turtlebot3-all

To include additional packages in this image, append them to the IMAGE_INSTALL variable in conf/local.conf:

IMAGE_INSTALL_append_pn-ros-image-turtlebot3-all = " <PKG1> <PKG2> ..."

webOS Images

These images can be built when one of webos-*.mcf was chosen for the configuration:

1. `webos-image-ros-core`

This webOS OSE image contains just the ROS "core".

source openembedded-core/oe-init-build-env
cd -
bitbake webos-image-ros-core

To include additional ROS packages in this image, append them to the IMAGE_INSTALL variable in conf/local.conf:

IMAGE_INSTALL_append_pn-webos-image-ros-core = " <PKG1> <PKG2> ..."

Note that the leading space after the opening double-quote is mandatory. See Customizing Images Using local.conf for more information.

2. `webos-image-ros-world`

This webOS OSE image contains all packages from a ROS distro that currently build and can be included in an image without conflicts. To include more when using warrior or zeus, add DISTRO_FEATURES_append = " opengl" to your conf/local.conf.

source openembedded-core/oe-init-build-env
cd -
bitbake webos-image-ros-world

3. `webos-image-ros-turtlebot3-core` (ROS 1 melodic only)

By default, this webOS OSE image contains the packages required for the core TurtleBot 3 operation listed here and here.

Note that this is not needed, because the images use root for their user account.

source openembedded-core/oe-init-build-env
cd -
bitbake webos-image-ros-turtlebot3-core

To include additional ROS packages in this image, append them to the IMAGE_INSTALL variable in conf/local.conf:

IMAGE_INSTALL_append_pn-webos-image-ros-turtlebot3-core = " <PKG1> <PKG2> ..."

4. `webos-image-ros-turtlebot3-all` (ROS 1 melodic only)

By default, this webOS OSE image contains all of the non-simulation related turtlebot3- prefixed packages and their prerequisities mentioned in the TurtleBot3 e-Manual.

Note that this is not needed, because the images use root for their user account.

source openembedded-core/oe-init-build-env
cd -
bitbake webos-image-ros-turtlebot3-all

To include additional ROS packages in this image, append them to the IMAGE_INSTALL variable in conf/local.conf:

IMAGE_INSTALL_append_pn-webos-image-ros-turtlebot3-all = " <PKG1> <PKG2> ..."

Image Sanity Testing

For now, only the barest minimum sanity testing is done on the images.

ROS 1 Sanity Test

# ping lge.com
# source /opt/ros/melodic/setup.sh    # Skip if built with "ros-implicit-workspace" in IMAGE_FEATURES.
# echo $LD_LIBRARY_PATH               # If set, all the paths must exist.
# roscore &
...
started core service [/rosout]
# rosnode list
/rosout
# rosnode info /rosout
--------------------------------------------------------------------------------
Node [/rosout]
Publications:
* /rosout_agg [rosgraph_msgs/Log]

Subscriptions:
* /rosout [unknown type]

Services:
* /rosout/get_loggers
* /rosout/set_logger_level

contacting node http://127.0.0.1:34643/ ...
Pid: 1363

ROS 2 Sanity Test

Note that without a network connection, there's no output from ros2 topic echo /chatter.

# ping lge.com
# source ros_setup.sh                 # Skip if built with "ros-implicit-workspace" in IMAGE_FEATURES.
# echo $LD_LIBRARY_PATH               # If set, all the paths must exist.
# ros2 topic list
/parameter_events
/rosout

# ros2 msg list                       # dashing
# ros2 interfaces list -m             # eloquent and later
...

# (sleep 5; ros2 topic pub /chatter std_msgs/String "data: Hello world") &
# ros2 topic echo /chatter
publisher: beginning loop
publishing #1: std_msgs.msg.String(data='Hello world')

data: Hello world

publishing #2: std_msgs.msg.String(data='Hello world')

data: Hello world

webOS OSE Sanity Test

The webOS OSE menu must appear after pressing the Windows key and allow the settings for Network to be launched.

TurtleBot 3 Sanity Test (`raspberrypi*` only)

Follow the TurtleBot 3 Bringup Instructions, except roscore is run on the TurtleBot 3 and in the background. If the message:

[WARN] [<timestamp>]: Failed to get param: timeout expired

appears, restart turtlebot3_bringup and try again.

Usage Notes

If a meta-ros/scripts/mcf file exists in your project, it is using an older meta-ros with layer version 2. Please start again from scratch in a new project directory following the instructions in the Build Environment Setup section. To allow you to transition, a branch [legacy-v2] was created before the start of the layer version 3 implementation in [thud]. Its files will not be changed nor its commits rebased.
You can override the settings in the *.mcf files for the URLs of the repos for meta-ros and meta-ros-webos and the branches fetched from them by setting these environment variables:
```
MCF_META_ROS_REPO_URL
MCF_META_ROS_BRANCH
MCF_META_ROS_COMMIT

MCF_META_ROS_WEBOS_REPO_URL
MCF_META_ROS_WEBOS_BRANCH
MCF_META_ROS_WEBOS_COMMIT
```

To build from the current HEAD of meta-ros/meta-ros-webos using mcf, first pull the latest *.mcf files from the [build] branch and update the one you are using under conf/:

cd build
git pull
cd -

# Select the configuration you are building:
#
# distro=ros1
# distro=ros2
# distro=webos (oe_release_series=thud only)
#
# ros_distro=melodic
# ros_distro=dashing
# ros_distro=eloquent
# ros_distro=foxy
#
# oe_release_series=thud
# oe_release_series=warrior
# oe_release_series=zeus
# oe_release_series=dunfell
# oe_release_series=gatesgarth

cfg=$distro-$ros_distro-$oe_release_series.mcf
# Review the changes to the pins:
diff build/files/$cfg conf/$cfg
# If there are changes and you have not modified conf/$cfg, copy the file over:
cp build/files/$cfg conf/.
# Otherwise, merge them, eg, using: meld build/files/$cfg conf/$cfg
build/scripts/mcf -f conf/$cfg

Then override the pins of meta-ros and meta-ros-webos in the *.mcf file by setting the MCF_META_ROS_COMMIT and MCF_META_ROS_WEBOS_COMMIT environment variables to "". (As of Milestone 12, the branches of meta-ros and meta-ros-webos are no longer rebaseable, and the *.mcf files now pin their commits.)

If you are not using mcf to update the layer repos, but doing it manually, you should still update the HEAD-s of the other layer repos to match the commits pinned in the *.mcf for the configuration you are building.

The images are placed in TMPDIR/deploy/images/MACHINE. We've found balenaEtcher to be an excellent tool for flashing them to SD cards.
These images default to being non-production: the root account has no password.
When using the ros-image-* images on a raspberrypi*, the login prompt appears only on the HDMI display, not on the serial port. The opposite is true when using webos-image-ros-* images.
When using the webos-image-ros-* images, press the Windows key to bring up the webOS OSE menu. Navigate to the network settings page to discover the IP address assigned by DHCP to the Ethernet connection, and its MAC address. Once you know the MAC address of a connection, you can use ip neigh from another Linux machine to discover it's IP address.
If you have not added ros-implicit-workspace to IMAGE_FEATURES, you must set up a ROS workspace explicitly by issuing:
```
source /opt/ros/ROS_DISTRO/setup.sh       # ROS 1
source ros_setup.sh                       # ROS 2
```
Note that when running ROS 1:
- You must set the environment variable ROS_IP or ROS_HOSTNAME before source-ing setup.sh if the machine will be communicating with remote ROS nodes.
- You must set the environment variable ROS_MASTER_URI before source-ing setup.sh if roscore will be run on another ROS node.
When using the webos-image-ros-* images, you can arrange for per-device configuration (such as setting up the ROS workspace and connecting to a WiFi network) by attaching an ext4-formatted USB flash drive containing an executable rc.local script under USBROOT/webos-device-config/v1. If present, it will be run from there by the webos-device-config service upon first boot. The service also copies it to /var/palm/webos-device-config/rc.local, where upon subsequent boots, it will be run by /etc/rc.local. An example rc.local script can be found under meta-ros-webos/files/examples/webos-device-config/v1.
WiFi does not work "out-of-the-box" on the ros-image-* images.
WiFi does not work when running webOS OSE images on the B+ model of the Raspberry Pi 3. The symptom is that Network Configuration spins forever waiting for the list of SSIDs to appear.
If a webOS OSE image is booted without a display connected, start up is delayed (systemd waits for 90s for a event that never arrives because luna-surfacemanager has crashed).

TurtleBot 3 Waffle Pi with webOS OSE Usage

There is no need to compile packages on the TurtleBot 3. The webos-image-ros-turtlebot3-all image contains all of the packages that exist in ROS 1 melodic needed to run the examples in the TurtleBot3 e-Manual -- except those related to simulation and the visualization applications (eg RViz, rqt), which must continue to be run on a remote PC. (Also note that turtlebot3-follower does not run due to a missing dependency.)

For example, all of the SLAM application can be run on the TurtleBot 3 by issuing the usual commands there, adding the option not to launch RViz:

# roscore

# roslaunch turtlebot3_bringup turtlebot3_robot.launch

# roslaunch turtlebot3_slam turtlebot3_slam.launch slam_methods:=gmapping open_rviz:=false

The other two SLAM methods available in ROS 1 melodic, cartographer and karto, can also be specified.

Tips

If the TurtleBot 3 will not be communicating with remote ROS nodes, add ros-implicit-workspace to IMAGE_FEATURES so that you won't have to add source /opt/ros/ROS_DISTRO/setup.sh to /home/root/.profile every time you create a new image.
If your TurtleBot 3 has a Raspberry Pi 3 model B instead of a B+, we recommend creating a device configuration USB flash drive so that when the TurtleBot 3 starts up, its ROS workspace is set up and it's connected to a WiFi network. You can use the example in meta-ros-webos/files/examples/webos-device-config/v1/rc.local as a starting point. Remember to change its file mode to be executable.

Change Log

Revision 20

Push branches [thud], [warrior], [zeus], [dunfell], [master], and [build] to publish Milestone 13. This milestone adds support for building the foxy 2020-06-25 release with all of the OpenEmbedded release series and webOS OSE. It also adds support for building all of the ROS distros (including foxy) with OpenEmbedded gatesgarth (the next release series, currently in active development).

Revision 19

Push finalized, non-rebaseable branches [thud], [warrior], [zeus], [dunfell], [master], and [build] to complete Milestone 12. Besides adding support for the Q1 2020 releases of melodic, dashing, and eloquent, the release of OpenEmbedded dunfell and the release of webOS OSE v2.5.0, Milestone 12 makes significant changes to how packages that do not build are excluded from bitbake world and the *-image-*-world images, and alters the policy for selecting the versions of platform packages provided by OpenEmbedded (see Baseline Platform and Selection of Platform Package Versions) As of this milestone, the branches of meta-ros and meta-ros-webos will no longer be rebased; the [*-draft] branches will be kept coincident with their corresponding unsuffixed ones until they are dropped in Milestone 14.
Update the instructions for the switch to the branches without a -draft suffix, and for the pinning of meta-ros and meta-ros-webos layers in the *.mcf files.
Update the list of OpenEmbedded release series supported: dunfell has been released and gatesgarth is now supported.
ros-image-world and webos-image-ros-world can now be built for melodic.
Allow the commit specified in *.mcf files fetched by mcf for meta-ros/meta-ros-webos to be overridden by setting the MCF_META_ROS_COMMIT/MCF_META_ROS_WEBOS_COMMIT environment variables.
Introduce v2.2 of the additions to conf/local.conf:
- Allow overriding of the settings from the environment. (The names must be added to the BB_ENV_WHITELIST or BB_ENV_EXTRAWHITE whitelists).
- Form ROS_OE_RELEASE_SERIES_SUFFIX from the ROS_OE_RELEASE_SERIES variable introduced in Milestone 12 instead of MCF_OE_RELEASE_SERIES. The setting of MCF_OE_RELEASE_SERIES will be removed from the *.mcf files in an upcoming milestone.
Switch the ROS 2 sanity test from using the now deprecated ros2 msg list to ros2 interfaces list -m for eloquent and later.
Fixup the links in this document to Milestone sections in Superflore OE Recipe Generation Scheme.

Revision 18

Force push to [thud-draft], [master-draft], and [build-draft], and create new branches [warrior-draft] and [zeus-draft], to publish Milestone 11. This milestone migrating webOS OSE to v2.2, build 143, adds support for building ROS packages and images using the current OpenEmbedded release series warrior and zeus as well as the under development dunfell, and drops support for ROS 2 crystal (because its EOL has past).
Update the instructions for the new OpenEmbedded release series supported and for the dropping of support for ROS 2 crystal.
Clarify the instructions for updating branches to their current HEAD-s.
Change the definition of the *-world images to contain all packages that currently build and can be included in an image without conflicts.
When using warrior or zeus, opengl must be added to DISTRO_FEATURES in conf/local.conf to include the same packages in ros-image-world and ros-image-turtlebot3-* as when using thud or dunfell. (This need not be done for images for webOS OSE because it already has opengl in its DISTRO_FEATURES.)
Modify the additions to conf/local.conf to better support building for multiple OpenEmbedded release series. Increment ROS_LOCAL_CONF_SETTINGS_VERSION to "2.1".
Update the list of prerequisites to be installed with the new ones required by dunfell.
Switch the links to the Yocto documentation to point to the latest versions.
Replace "OE-Core" with "OpenEmbedded" everywhere.
Fix typos.

Revision 17

Force push to [thud-draft] to publish Milestone 10. This milestone adds support for building the December 2019 releases of melodic, crystal, dashing, and eloquent), as well as:
- adding support for qemux86 to melodic;
- moving the recipes for the components found in files/ROS_DISTRO/generated/newer-platform-components.list to meta-ros-common/recipes-infrastructure;
- slightly altering the scheme for forming the OpenEmbedded version portion of DISTRO_VERSION.
Add a step to the ROS sanity tests to check that LD_LIBARAY_PATH is correct.
Drop the on raspberrypi3 only qualification from the *turtlebot3* images. They can now be built for qemux86.
Fix typos.

Revision 16

Force push to [thud-draft] to publish Milestone 9 (support for ROS 2 eloquent).
Update this document for the addition of support for ROS 2 eloquent.
Forgot to update the location of files/examples/webos-device-config/v1/rc.local in revision 15: it's now under meta-ros-webos instead of meta-ros.

Revision 15

Force push to [thud-draft] to publish Milestone 8 (phase 1 of the implementation of layer version 3 of meta-ros). If you have been building from the [thud-draft] branch, please start again from scratch as soon as you can. To allow you to transition, a branch [legacy-v2] has been created from the previous [thud-draft]. Its files will not be changed its commits rebased.
Update this document for layer version 3:
- mcf and its configuration files are now in a separately-rooted branch '[build-draft]`.
- The repo URLs and branches to fetch specified in the *.mcf files for meta-ros and meta-ros-webos can be overridden via environment variables.
- The Build Environment Setup section has been changed, including the settings made in the conf/local.conf file.
- DISTRO no longer needs to be set in conf/bblayers.conf; however, ROS_DISTRO still must be (until Milestone 12).
- The image names have been simplified.
Make it easier to use meta-ros without using mcf.
As [morty-draft] was removed long ago, drop the references to it.

Revision 14

Clarify various portions of the build instructions so as to be clearer for those unfamiliar with OpenEmbedded.
Force push to [thud-draft] to publish numerous changes, in particular:
- The generation of files/ROS_DISTRO/cache.yaml has been split off from ros-generate-recipes.sh into its own script ros-generate-cache.sh and copies of the rosdep platform package mapping files are now retained.
- The recipes for ROS 1 melodic were regenerated from its newer 2019-09-30 release using these scripts.
- The recipes for ROS 2 crystal were regenerated from its newer 2019-09-19 release using these scripts.
- The recipes for ROS 2 dashing were regenerated from its 2019-05-31 release using these scripts. Note that previously, the recipes had been generated from a cache.yaml that had several changes beyond that for the release.
- meta-ros/files/examples/webos-device-config/v1/rc.local was tweaked to wait longer for WiFi enable to complete.
- The Raspberry Pi video camera is now always enabled.
- Additional useful variables can be displayed in the build configuration output by adding require conf/distro/include/ros-useful-buildcfg-vars.inc to conf/local.conf.
- Drop morty-related commits; rearrange and squash many others.

Revision 13

Push (unforced) to [thud-draft] a greatly improved re-implementation of the per-device configuration scheme, including a revamped meta-ros/files/examples/webos-device-config/v1/rc.local.
Explain when ROS 1 ROS_* environment variables must be set before source-ing setup.sh.
Tweak the TurtleBot 3 SLAM example to make it explicit that all the commands are run on the TurtleBot 3.
Clarify the TurtleBot 3 tips.

Revision 12

Push (unforced) to [thud-draft] to publish numerous changes, in particular:
- Added support for creating images for the TurtleBot 3 Waffle Pi under ROS 1 melodic:
  - There are core-image-ros-turtlebot3-core and webos-image-ros-turtlebot3-core images that contain the packages required for the core TurtleBot 3 operation listed here and here.
  - There are core-image-ros-turtlebot3-all and webos-image-ros-turtlebot3-all images that contain all of the non-simulation related turtlebot3- prefixed packages in ROS 1 melodic and their prerequisities mentioned in the TurtleBot3 e-Manual
- Per-device configuration using a USB flash drive can be done when using webOS OSE images.
- The recipes for ROS 1 melodic were regenerated from its 2019-09-10 release.
- The Raspberry Pi video camera is now enabled.
Convert the items under Build Environment Setup to numbered steps.
Add instructions for building the TurtleBot 3 images, a TurtleBot 3 sanity test, and a section on its usage.

Revision 11

Force push to [thud-draft] to publish numerous changes, in particular:
- *-roscore images can be built for ROS 1 melodic. Note that you must set the environment variable ROS_IP or ROS_HOSTNAME before source-ing setup.sh if the machine will be communicating with remote ROS nodes.
- The recipes for ROS 2 crystal were regenerated based on its 2019-09-05 release.
- webOS OSE images now continuously synchronize the machine's time with time.google.com. Previously, it was only set once at startup.
- webOS OSE images now have all of the kernel modules installed. Previously, only a portion were.
- webOS OSE images for qemux86 now have linux-yocto v4.18.
- core-image-ros-* images now contain connman, which means that Etherent networking is automatically started. (However, WiFi isn't; add an item mentioning this under Usage Notes.)
Add instructions for building ROS 1 melodic images.
Document various values for EXTRA_IMAGE_FEATURES that can be set in conf/local.conf.

Revision 10

Push (unforced) a commit that enables the Ethernet connection when running webOS OSE images on the B+ model of the Raspberry Pi 3; however, the Wi-Fi remains broken. Add an item to this effect under Usage Notes.
Add ping lge.com to the sanity test to confirm that networking is working.

Revision 9

Clarify that the build environment setup instructions are for a new project without any settings in the environment of variables used by openembedded-core/oe-init-build-env.

Revision 8

Update for the migration to OpenEmbedded thud.
Update for the support of ROS 2 dashing.
Add lines that delimit the additions made to conf/local.conf. Introduce ROS_LOCAL_CONF_SETTINGS_VERSION to track the version of the settings.
Reduce the size of the build artifacts by adding the setting to conf/local.conf that causes rm_work to be inherited globally.
Drop the PARALLEL_MAKE_pn-pcl setting in conf/local.conf as the calculation of the value for PARALLEL_MAKE has been added to the recipe for pcl.
Add an Image Sanity Testing section.

Revision 7

Drop setting DISTRO in conf/local.conf. It's now set in conf/bblayser.conf to the Distribution setting in *.mcf.
Add instructions on how to include additions ROS packages to the *-ros-core images.
Add more usage notes.

Revision 6

Problems have been observed when TMPDIR is shared between ROS_DISTRO-s => include -${ROS-DISTRO} in its value.
Fix typo.

Revision 5

Update the plans for ROS 2 dashing support.
Simpify and clarify the build setup instructions. Also make them more robust.
Add a note on to how update meta-ros.
Fix typos.

Revision 4

Revise for the inclusion of mcf in meta-ros.
Add support for using webOS OSE as the OpenEmbedded DISTRO.

Revision 3

Add a step to install the prerequisites.
Add instructions to build for Raspberry Pi.
Fix typo.

Revision 2

Drop setting SSTATE_MIRRORS because meta-ros adds global environment variables that invalidates even the shared state for native packages.
Specify a PARALLEL_MAKE_pn-pcl setting so that building pcl doesn't take nearly 3 hours.
Fix typos.

Revision 1

Initial publication.

OpenEmbedded Build Instructions

OpenEmbedded Build Instructions

Build Environment Setup

Building Images

ROS 1 and ROS 2 Images

1. ros-image-core

2. ros-image-world

3. ros-image-turtlebot3-core (ROS 1 melodic only)

4. ros-image-turtlebot3-all (ROS 1 melodic only)

webOS Images

1. webos-image-ros-core

2. webos-image-ros-world

3. webos-image-ros-turtlebot3-core (ROS 1 melodic only)

4. webos-image-ros-turtlebot3-all (ROS 1 melodic only)

Image Sanity Testing

ROS 1 Sanity Test

ROS 2 Sanity Test

webOS OSE Sanity Test

TurtleBot 3 Sanity Test (raspberrypi* only)

Usage Notes

TurtleBot 3 Waffle Pi with webOS OSE Usage

Tips

Change Log

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Revision 19

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Revision 9

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Revision 6

Revision 5

Revision 4

Revision 3

Revision 2

Revision 1

Clone this wiki locally

1. `ros-image-core`

2. `ros-image-world`

3. `ros-image-turtlebot3-core` (ROS 1 melodic only)

4. `ros-image-turtlebot3-all` (ROS 1 melodic only)

1. `webos-image-ros-core`

2. `webos-image-ros-world`

3. `webos-image-ros-turtlebot3-core` (ROS 1 melodic only)

4. `webos-image-ros-turtlebot3-all` (ROS 1 melodic only)

TurtleBot 3 Sanity Test (`raspberrypi*` only)