Ubuntu 24.04 cannot find llvm repository

[dvdmc]

Bug report

• Project AirSim Version/#commit: v0.1.1
• autopilot version: XXX
• OS Version: Ubuntu 24.04

What's the issue you encountered?

Hi! Thanks for the amazing work keeping up with this project. I hope to be an active developer from now on. So far I found the following problem with the setup:

The ./setup_linux_dev_tools.sh adds strange llvm repositories. Are the 13 version of libc++ and clang required? When I run the script I get the following:

Err:9 https://apt.llvm.org/noble llvm-toolchain-noble-13 Release

  404  Not Found [IP: 199.232.34.49 443]

Hit:10 http://packages.ros.org/ros2/ubuntu noble InRelease

Reading package lists... Done

E: The repository 'http://apt.llvm.org/noble llvm-toolchain-noble-13 Release' does not have a Release file.

N: Updating from such a repository can't be done securely, and is therefore disabled by default.

N: See apt-secure(8) manpage for repository creation and user configuration details.

But I have clang and libc++ 14,15, and 16 on Ubuntu 24.04 but the 13 needs the llvm toolchain. Is that required?

[dvdmc]

Okay, next error already! :D I noticed that if I use the UE linux toolchain it shouldn't try to use libc++13 but this path does not seem to exist: /path/to/UnrealEngine/Engine/Extras/ThirdPartyNotUE/SDKs/HostLinux/Linux_x64 in Unreal 5.7.3

[Kokika]

I had same experience. It is working on Ubuntu 24.04 with eu 5.7.4 for me.
I deleted the created file with instal dependency script and manually installed them.

Should it be add skip this step for ubuntu 24?

[dvdmc]

We gave up trying to use Unreal on Ubuntu 24.04. It's really not working. Actually, we even gave up on ProjectAirsim and resorted to one of the new versions of old Airsim. The new communication protocol is really hard to setup.
This is the version we are using: https://github.com/Cosys-Lab/Cosys-AirSim

[Kokika]

@dvdmc What is the problem?
I am using latest master with unreal engine 5.7 and I could run Blocks with Editor and python example project with just few change.
I would like to know, because I want to switch from Cosys-Airsim to this version.
I didn't tried everything so I would like to know when I hit roadblock.

Cosys Airsim are supporting well Ubuntu 24.04. I am even using it before they added 24.04 settings for build and I had fiddle more to make it work.

[dvdmc]

Sounds great! I can't recall the exact details but we had several problems due to the gcc version when tried to avoid 13. We tried several manual compilation toolchains for Unreal that resulted in linking problems with system-libraries.

Our main problem is the typical "Some plugins were built with a different Unreal version" pop up window when trying to run the Unreal Editor. Trying to compile from the UI or terminal with the Unreal manual compilation resulted in errors. I think that we were able to somehow run the blocks environment at some point.

But then came the ROS2 bridge, which was our main reason to swap to the older Airsim lirbary (aka: old airlib). The new ProjectAirsim seems to have a publisher subscriber protocol within airlib, instead of the old API calls. That makes creating a custom ROS wrapper much more complicated than before.

Regardless, if you have any insights, we would greatly appreciate your feedback.