William Bulle's profile - activity

OS: Ubtuntu 16.04

Target: Ubuntu armhf 18.04

ROS-DISTRIB = ROS2 Crystal

I am looking to cross-compile a minimalistic ros2 built intended for embedded, but the current cross-compilation tutorial imports and builds the whole ros2 source repository.

Some visualization packages are already disabled.

touch \
    ros2_ws/src/ros2/rviz/COLCON_IGNORE \
    ros2_ws/src/ros-visualization/COLCON_IGNORE

• Where can I find the different packages used for ros-base (barebone) ? Including self-contained libraries as I'm building from source with the option -DFORCE_BUILD_VENDOR_PKG=ON

• And how bare-bone can I get while keeping the main functionalities of ROS2 ? Regarding this question, this answer was given some time ago but when doing so, I encountered a ERROR 404:

 urllib.error.HTTPError: HTTP Error 404: Not Found (https://raw.githubusercontent.com/ros2/rosdistro/ros2/index.yaml)

EDIT

• Second point resolved (see comment below)

• I tried to list the sources needed for a lightweight ROS. It might be missing some important dependency:

https://pastebin.com/jnWRNzNx

[EDIT 2]

from @gvdhoorn comment:

REP 2001: ROS Bouncy and Newer Variants gives the different dependencies for ros2.

Then create the ros2_core.repos with

rosinstall_generator ros_core --rosdistro crystal --deps > ros_core.repos

Use vsc for importing the source:

vcs-import src < ros2.repos

I specified --upstream-development as I wanted to have some upstream package in order to use the -DFORCE_BUILD_VENDOR_PK

I specified --upstream-development as I wanted to have some upstream package in order to use the -DFORCE_BUILD_VENDOR_PK

I specified --upstream-development as I wanted to have some upstream package in order to use the -DFORCE_BUILD_VENDOR_PK

Oh it makes sense that rosdep tries to download the dependencies for ros_base and desktop. But ultimately it failed to a

I generated my .install with rosinstall_generator ros_core --rosdistro crystal --upstream-development --deps > ros2_

Automated crosscompilation failing at rosdep install step I am trying to cross-compile ros2 crystal core for Ubuntu 18.0

Automated crosscompilation failing at rosdep install step I am trying to cross-compile ros2 crystal core for Ubuntu 18.0

Automated crosscompilation failing at rosdep install step I am trying to cross-compile ros2 crystal core for Ubuntu 18.0

Did you install the apt sources as specified in the tuto ? The debian packages only exist for arm64. If your Pi has its

From the comments of @gvdhoorn and @marguedas : Using ROS REP 2001 and python3-rosinstall_generator, we can generate ou

From the comments of @gvdhoorn and @marguedas : Using ROS REP 2001 and python3-rosinstall_generator, we can generate ou

From the comments of @gvdhoorn and @marguedas : Using ROS REP 2001 and python3-rosinstall_generator, we can generate ou

@marguedas : I encountered some build issues that might come from the discrepancy of the source as ros2.depos are set t

@marguedas : I encountered some build issues that might come from the discrepancy of the source as ros2.depos are set t

@marguedas I encountered some build issues as ros2.depos are set to ros2 or foreign repos eg: ros2.depos eProsima/

@marguedas I encountered some build issues as ros2.depos are set to ros2 or foreign repos eg: ros2.depos eProsima/Fa

@marguedas I encountered some build issues as ros2.depos are set to ros2 or foreign repos eg: ros2.depos eProsi

@marguedas: to use the -DFORCE_BUILD_VENDOR_PKG=ON I git update the vendors' repos to the master branch. I came to the s

From the comments of @gvdhoorn and @marguedas : Using ROS REP 2001 and python3-rosinstall_generator, we can generate ou

[ROS2 Crystal] Minimalistic built from sources OS: Ubtuntu 16.04 Target: Ubuntu armhf 18.04 ROS-DISTRIB = ROS2 Crystal

@gvdhoorn Thank you for the link. That's what I looking for. I just used rosinstall_generator for print out the depend

Thank you for the link. That's what I looking for. I just used rosinstall_generator for print out the dependencies of t

[ROS2 Crystal] Minimalistic built from sources OS: Ubtuntu 16.04 Target: Ubuntu armhf 18.04 ROS-DISTRIB = ROS2 Crystal

[ROS2 Crystal] Minimalistic built from sources OS: Ubtuntu 16.04 Target: Ubuntu armhf 18.04 ROS-DISTRIB = ROS2 Crystal

[ROS2 Crystal] Minimalistic built from sources OS: Ubtuntu 16.04 Target: Ubuntu armhf 18.04 ROS-DISTRIB = ROS2 Crystal

Where should I add this flag ? I tried to add it to generic_linux.cmake with set(FORCE_BUILD_VENDOR_PKG ON) but the libr

Where should I added this flag ? I tried to add it to generic_linux.cmake with set(FORCE_BUILD_VENDOR_PKG ON) but the li

Where should I added this flag ? I tried to add it to generic_linux.cmake with set(FORCE_BUILD_VENDOR_PKG ON) but the li

Where should I added this flag ? I tried to add it to generic_linux.cmake with set(FORCE_BUILD_VENDOR_PKG ON) but the li

libPocoFoundation.so present but can't be found on Linux arm Target OS: Ubuntu 18.04.2 LTS Target System: Lin

Target OS:

Ubuntu 18.04.2 LTS

Target System:

Linux arm 4.14.79-ti-r84 #1 SMP PREEMPT armv7l armv7l armv7l GNU/Linux

I cross-compiled the source for ROS 2 using the following tutorial (on a Ubuntu 16.04 x86_64)

As I am building for a beagle-board (bbb), the examples are only for arm64 so i made these following changes in the cross_compile repository:

in Dockerfile_ubuntu_arm:

4 ARG ARM_ARCH=arm32v7
...
37 RUN sh -c 'echo "deb [arch=amd64,armhf] http://repo.ros2.org/ubuntu/main \
`lsb_release -cs` main" > /etc/apt/sources.list.d/ros2-latest.list'

and in entry_point.sh:

$ export TARGET_ARCH=arm
$ export TARGET_TRIPLE=arm-linux-gnueabihf

But after the built, I exported the ros build with:

docker cp ros2_cc:/root/cc_ws/ros2_ws .

and send it in the home directory of my board.

Then I tried to test the talker/listener examples:

$ ros2 run demo_nodes_cpp talker

and I received this error:

Failed to load entry point 'launch': libPocoFoundation.so.50: cannot open shared object file: No such file or directory The C extension '/home/ubuntu/ros2_ws/install/lib/python3.6/site-packages/rclpy/_rclpy.cpython-36m-arm-linux-gnueabihf.so' failed to be imported while being present on the system. Please refer to 'https://githu b.com/ros2/ros2/wiki/Rclpy-Import-error-hint' for possible solutions 
[...] 
/home/ubuntu/ros2_ws/install/lib/demo_nodes_cpp/talker: error while loading shared libraries: libPocoFoundation.so.50: cannot open shared object file: No such file or directory

same for the others entry points (start,status,list,get...).

From the tutorial, there is a known issue with the the Poco pre-built. But these steps are included in the entry_point. Also the provided link didn't help much.

Thank for your help.

[EDIT] Downloading the missing libraries seems to fix the issue as suggested in the comments.

For a long term-fix: Trying to get the fix submitted by alsora:

It returns me:

CMake Error: The source directory "/root/cc_ws/ros2_ws/build/fastcdr/-FORCE_BUILD_VENDOR_PKG=ON" does not exist.
Specify --help for usage, or press the help button on the CMake GUI.
---
Failed   <<< fastcdr    [ Exited with code 1 ]
--- stderr: poco_vendor
CMake Error: The source directory "/root/cc_ws/ros2_ws/build/poco_vendor/-FORCE_BUILD_VENDOR_PKG=ON" does not exist.
Specify --help for usage, or press the help button on the CMake GUI.
---
Failed   <<< poco_vendor        [ Exited with code 1 ]
Aborted  <<< ament_cmake_core
Aborted  <<< ament_flake8                               

Summary: 1 package finished [4.06s]
  2 packages failed: fastcdr poco_vendor
  2 packages aborted: ament_cmake_core ament_flake8
  2 packages had stderr output: fastcdr poco_vendor
  188 packages not processed

libPocoFoundation.so present but can't be found on Linux arm Target OS: Ubuntu 18.04.2 LTS Target System: Lin