Building micro-ROS-Agent

[xaviergh]

Hi, I've been trying to build micro-ros using its official instructions, so far I have managed to build micro_ros_setup and micro_ros_msgs. However, micro_ros_agent fails.
It seems that most of the errors (if not all, because the log is long) are related to spdlog and fmt; later I found out that those two libraries are specially tricky with its versions:

/my/path/ros2_testx/.pixi/envs/default/include/fmt/base.h:1643:3: error: static assertion failed due to requirement 'formattable': Cannot format an argument. To make type T formattable provide a formatter<T> specialization: https://fmt.dev/latest/api.html#udt static_assert( ^

I have tried to change spdlog and fmt versions in robostack-stagin (humble) and robostack-jazzy to no avail. The versions are:

• spdlog 1.14.1
• fmt 11.0.2

After checking spdlog releases, version 1.14.1 seems to be matched with fmt 10.2.1 and version 1.15.0 with fmt 11.0.2; when I tried to update spdlog with pixi add "spdlog==1.15.0" I get:

Error: 
  × failed to solve the conda requirements of 'default' 'osx-arm64'
  ╰─▶ Cannot solve the request because of: ros-humble-desktop >=0.10.0,<0.11 cannot be
      installed because there are no viable options:
      └─ ros-humble-desktop 0.10.0 | 0.10.0 | 0.10.0 | 0.10.0 | 0.10.0 | 0.10.0 would require
         └─ ros-humble-topic-monitor *, which cannot be installed because there are no viable
      options:
            └─ ros-humble-topic-monitor 0.20.2 | 0.20.3 | 0.20.3 | 0.20.3 | 0.20.5 | 0.20.5
      would require
               └─ ros-humble-rclpy *, which cannot be installed because there are no viable
      options:
                  └─ ros-humble-rclpy 3.3.5 | 3.3.7 | 3.3.11 | 3.3.11 | 3.3.15 | 3.3.15 would
      require
                     └─ ros-humble-rcl *, which cannot be installed because there are no
      viable options:
                        └─ ros-humble-rcl 5.3.2 | 5.3.2 | 5.3.7 | 5.3.7 | 5.3.9 | 5.3.9 would
      require
                           └─ ros-humble-rcl-logging-spdlog *, which cannot be installed
      because there are no viable options:
                              └─ ros-humble-rcl-logging-spdlog 2.3.1 | 2.3.1 | 2.3.1 | 2.3.1
      | 2.3.1 | 2.3.1 would require
                                 └─ spdlog >=1.11.0,<1.12.0a0, for which no candidates were
      found.

Have anyone manage to build micro-ros-agent with pixi?

Any suggestiong to solve the dependency are welcome.

Thanks in advance!

[ruben-arts]

The robostack distributions are always build against a specific version of spdlog so you can't change this on the fly without rebuilding the ros packages.

It's weird that you get an error on fmt as it is a dependency of spdlog so that should work together. Are you able to share your pixi project?

Calling in the experts: @traversaro @Tobias-Fischer @wolfv

[traversaro]

Hello @xaviergh, for making it more probable that someone can help you, it could make sense if you could provide the following:

• The pixi list of your environment (or even better your pixi.toml/pixi.lock)
• The commands that you are executing (I know that you linked https://github.com/micro-ROS/micro_ros_setup?tab=readme-ov-file#building-micro-ros-agent, but if you provide the actual commands you are calling?
• Instead of providing just the last line of the error, can you provide the full compiled output that lead to the error?

[traversaro]

All of this can be easily wrapped up in a single repo in which the issue can be reproduced with pixi run reproduceissue, but I understand that these can take some time.

[Tobias-Fischer]

https://github.com/RoboStack/ros-noetic/blob/330ac1d36e6410683c039fbad4b60b60a61c8b6b/patch/ros-noetic-rosfmt.patch#L103 Might help. It’s probably easiest if you open a pull request and add the packages you want in there so we can take a look in CI