.. redirect-from:: Installation/Alternatives/Fedora-Development-Setup Installation/Fedora-Development-Setup Installation/RHEL-Development-Setup RHEL (source) ============= .. contents:: Table of Contents :depth: 2 :local: System requirements ------------------- The current target Red Hat platforms for {DISTRO_TITLE_FULL} are: - Tier 2: RHEL 9 64-bit As defined in `REP 2000 `_. System setup ------------ Set locale ^^^^^^^^^^ .. include:: ../_RHEL-Set-Locale.rst Enable required repositories ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ .. tabs:: .. group-tab:: RHEL The rosdep database contains packages from the EPEL and PowerTools repositories, which are not enabled by default. They can be enabled by running: .. code-block:: bash sudo dnf install 'dnf-command(config-manager)' epel-release -y sudo dnf config-manager --set-enabled crb .. note:: This step may be slightly different depending on the distribution you are using. Check the EPEL documentation: https://docs.fedoraproject.org/en-US/epel/#_quickstart .. group-tab:: Fedora No additional setup required. Install development tools ^^^^^^^^^^^^^^^^^^^^^^^^^ .. code-block:: bash sudo dnf install -y \ cmake \ gcc-c++ \ git \ make \ patch \ python3-colcon-common-extensions \ python3-flake8-builtins \ python3-flake8-comprehensions \ python3-flake8-docstrings \ python3-flake8-import-order \ python3-flake8-quotes \ python3-mypy \ python3-pip \ python3-pydocstyle \ python3-pytest \ python3-pytest-repeat \ python3-pytest-rerunfailures \ python3-rosdep \ python3-setuptools \ python3-vcstool \ wget # install some pip packages needed for testing and # not available as RPMs python3 -m pip install -U --user \ flake8-blind-except==0.1.1 \ flake8-class-newline \ flake8-deprecated Build ROS 2 ----------- Get ROS 2 code ^^^^^^^^^^^^^^ Create a workspace and clone all repos: .. code-block:: bash mkdir -p ~/ros2_{DISTRO}/src cd ~/ros2_{DISTRO} vcs import --input https://raw.githubusercontent.com/ros2/ros2/{REPOS_FILE_BRANCH}/ros2.repos src Install dependencies using rosdep ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ .. include:: ../_Dnf-Update-Admonition.rst .. code-block:: bash sudo rosdep init rosdep update rosdep install --from-paths src --ignore-src -y --skip-keys "fastcdr ignition-cmake2 ignition-math6 rti-connext-dds-6.0.1 urdfdom_headers" Install additional RMW implementations (optional) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The default middleware that ROS 2 uses is ``Fast DDS``, but the middleware (RMW) can be replaced at build or runtime. See the :doc:`guide <../../How-To-Guides/Working-with-multiple-RMW-implementations>` on how to work with multiple RMWs. Build the code in the workspace ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ If you have already installed ROS 2 another way (either via RPMs or the binary distribution), make sure that you run the below commands in a fresh environment that does not have those other installations sourced. Also ensure that you do not have ``source /opt/ros/${ROS_DISTRO}/setup.bash`` in your ``.bashrc``. You can make sure that ROS 2 is not sourced with the command ``printenv | grep -i ROS``. The output should be empty. More info on working with a ROS workspace can be found in :doc:`this tutorial <../../Tutorials/Beginner-Client-Libraries/Colcon-Tutorial>`. .. code-block:: bash cd ~/ros2_{DISTRO}/ colcon build --symlink-install .. note:: If you are having trouble compiling all examples and this is preventing you from completing a successful build, you can use the ``--packages-skip`` colcon flag to ignore the package that is causing problems. For instance, if you don't want to install the large OpenCV library, you could skip building the packages that depend on it using the command: .. code-block:: bash colcon build --symlink-install --packages-skip image_tools intra_process_demo Setup environment ----------------- Set up your environment by sourcing the following file. .. code-block:: bash # Replace ".bash" with your shell if you're not using bash # Possible values are: setup.bash, setup.sh, setup.zsh . ~/ros2_{DISTRO}/install/local_setup.bash Try some examples ----------------- In one terminal, source the setup file and then run a C++ ``talker``\ : .. code-block:: bash . ~/ros2_{DISTRO}/install/local_setup.bash ros2 run demo_nodes_cpp talker In another terminal source the setup file and then run a Python ``listener``\ : .. code-block:: bash . ~/ros2_{DISTRO}/install/local_setup.bash ros2 run demo_nodes_py listener You should see the ``talker`` saying that it's ``Publishing`` messages and the ``listener`` saying ``I heard`` those messages. This verifies both the C++ and Python APIs are working properly. Hooray! Next steps ---------- Continue with the :doc:`tutorials and demos <../../Tutorials>` to configure your environment, create your own workspace and packages, and learn ROS 2 core concepts. Alternate compilers ------------------- Using a different compiler besides gcc to compile ROS 2 is easy. If you set the environment variables ``CC`` and ``CXX`` to executables for a working C and C++ compiler, respectively, and retrigger CMake configuration (by using ``--force-cmake-config`` or by deleting the packages you want to be affected), CMake will reconfigure and use the different compiler. Clang ^^^^^ To configure CMake to detect and use Clang: .. code-block:: bash sudo dnf install clang export CC=clang export CXX=clang++ colcon build --cmake-force-configure Stay up to date --------------- See :doc:`../Maintaining-a-Source-Checkout` to periodically refresh your source installation. Troubleshoot ------------ Troubleshooting techniques can be found :ref:`here `. Uninstall --------- 1. If you installed your workspace with colcon as instructed above, "uninstalling" could be just a matter of opening a new terminal and not sourcing the workspace's ``setup`` file. This way, your environment will behave as though there is no {DISTRO_TITLE} install on your system. 2. If you're also trying to free up space, you can delete the entire workspace directory with: .. code-block:: bash rm -rf ~/ros2_{DISTRO}