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Asked: 2024-09-24T14:04:12+05:30 In:

How can I install LLVM version 7 on Ubuntu 22.04?

I’ve been trying to get LLVM version 7 installed on my Ubuntu 22.04 system, and I’m kind of at my wit’s end here. I know that LLVM has gone through several versions and updates, but for some reason, I really need to stick with version 7 for a specific project I’m working on. The project has some legacy code that doesn’t seem to play nice with later versions, and I’ve read that version 7 has some features that are crucial for what I’m trying to accomplish.

I attempted to use the built-in package manager with `apt`, but every time I search for LLVM, I just get the more recent versions showing up, and it’s frustrating. I’ve scoured various forums and even tried looking through the LLVM official documentation, but a step-by-step guide for installing an older version like this on a newer OS doesn’t seem to exist.

I also considered building LLVM from source, but man, that seems overly complicated and time-consuming. I’m worried I might mess up my environment or end up with a clunky installation that will give me headaches down the line. Plus, building from source means I have to manage dependencies manually, right? That’s something else I’m not too keen on messing around with.

If anyone has gone through this struggle or has any kind of workaround, I’d love to hear your insights. I’m particularly interested in whether there’s an easier way using apt or a PPA that might have version 7 available. Maybe you’ve successfully installed it and can share the exact commands you used? Or if you’ve tackled the source installation, any tips to make that process smoother would also be appreciated.

Honestly, I’m feeling a bit lost here and could really use some guidance. Thanks in advance to anyone who can help me figure this out!

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    2 Answers



    1. Installing LLVM 7 on Ubuntu 22.04

      Installing LLVM 7 on Ubuntu 22.04

      I totally get your frustration with trying to install LLVM version 7 on your Ubuntu 22.04 system. Thankfully, there’s a way to do this without too much hassle!

      Using a PPA (Personal Package Archive)

      Instead of building it from source, you can try using a PPA that has LLVM 7 available. Here’s how you can do it step-by-step:

      1. Open your terminal.
      2. First, add the LLVM PPA:
        3.             sudo add-apt-repository ppa:ubuntu-toolchain-r/test
      3. Next, update your package list:
        4.             sudo apt update
      4. Now, install LLVM 7:
        5.             sudo apt install llvm-7
      5. Check if the installation was successful by checking the version:
        6.             llvm-config --version

      If You Can’t Find Version 7

      If the above steps don’t work, you might want to download the LLVM 7 packages directly from the LLVM website:

      1. Go to the LLVM releases page.

      2. Look for version 7 and download the appropriate .deb files for your architecture.

      3. Install them using:

              sudo dpkg -i package_name.deb
        sudo apt -f install  # This will fix any dependency issues

      Final Notes

      Building from source is an option, but it can be a bit of a headache, so sticking to a PPA or pre-built packages is definitely the way to go if you’re feeling unsure!

      Hopefully, this helps you get through the installation! Good luck with your project!


    2. Installing LLVM version 7 on Ubuntu 22.04 can indeed be a challenge due to repository changes and the availability of only newer versions in standard package managers like `apt`. However, one practical workaround is to use a Personal Package Archive (PPA) that hosts older versions. You can use the `ppa:ubuntu-toolchain-r/test` PPA which often carries backported versions of tools. To add this PPA, execute the following commands in your terminal:

      sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt update
sudo apt install llvm-7

      If LLVM version 7 is not found in the PPA, your best alternative would be to download the binaries or packages directly from the LLVM releases page. This method is straightforward and alleviates the worry of building from source. Simply browse to the LLVM release archives, find version 7, and download the appropriate .deb files. Install them using `dpkg`. This approach will ensure minimal disruption to your current environment while allowing you to use the specific version needed for your project. Remember to check for any missing dependencies after installation.

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