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Asked: 2024-09-24T19:46:11+05:30 In:

How can I install LLVM version 10 on Ubuntu 18.04?

I’ve been diving into some C++ projects lately, and I’ve heard a lot about LLVM, especially version 10. I’ve seen some posts that say it’s a game changer for code optimization, but I’m running Ubuntu 18.04, and I’m a bit lost on how to get it set up. I’ve tried a couple of times, but things just don’t seem to be going smoothly.

First off, I noticed there are quite a few different ways to install it—like via apt, building from source, or using precompiled binaries. Honestly, I’m not really up for the source build drama unless absolutely necessary, so I’m leaning more towards the apt method. But then, I came across some discussions saying the version available in standard repositories isn’t really what I’m looking for. Has anyone here successfully managed to get LLVM 10 installed on Ubuntu 18.04 without running into too many headaches?

Another thing is that I’m also curious about whether there are any dependencies I should worry about. I mean, I don’t want to go through this process only to find out that something essential is missing, leading to a whole afternoon of troubleshooting. I really just want a seamless installation experience, you know?

And what about the configuration part? Once I get LLVM 10 installed, are there additional steps I should follow to ensure everything is set up correctly? I’ve heard that sometimes you need to set environment variables or tweak some paths; is that true?

I’ve looked around online, but the instructions I found seem to be all over the place. Some are outdated and refer to earlier versions, which makes it even more confusing. If anyone here has successfully pulled off this installation and could share a step-by-step guide, or at least point me in the right direction without overwhelming me with jargon, I would really appreciate it! I suppose it’s even more daunting since I’m a bit of a newcomer to this whole LLVM ecosystem. Any insights would be super helpful!

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    2 Answers


    1. Installing LLVM 10 on Ubuntu 18.04 can be done smoothly using the apt package manager, albeit with a few extra steps to ensure you have the right version and dependencies. First, you’ll want to add the official LLVM repository to your system, as the version available in the standard repositories might be outdated. To do this, open your terminal and run the following commands:

          sudo apt install wget
    wget https://apt.llvm.org/llvm-snapshot.gpg.key
    sudo apt-key add llvm-snapshot.gpg.key
    echo "deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-10 main" | sudo tee /etc/apt/sources.list.d/llvm-toolchain-bionic-10.list
    sudo apt update
    sudo apt install llvm-10 clang-10

      Following this installation, ensure you check for any missing dependencies by running a quick update. Generally, the above steps should handle what you need, but keep an eye out for any prompts regarding additional packages. After installation, it’s important to verify that LLVM is correctly set up on your system. You can check the version by running llvm-config --version. Additionally, you may want to configure your environment by adding LLVM’s binary path to your PATH. Open your ~/.bashrc file and add the following line:

          export PATH=/usr/lib/llvm-10/bin:$PATH

      Finally, run source ~/.bashrc to apply the changes. This configuration should provide you with a seamless experience while diving into your C++ projects.




    2. Installing LLVM 10 on Ubuntu 18.04

      Getting LLVM 10 Set Up on Ubuntu 18.04

      Hey there! So, if you’re looking to install LLVM 10 on Ubuntu 18.04 without too much hassle, you’re in the right place. Here’s a straightforward way to do it using the apt method.

      Step-by-Step Guide

      1. First, let’s update your package list. Open up your terminal and run:
        2. sudo apt update
      2. Next, you need to add the LLVM repository. Run this command to add the official LLVM repository:
        3. sudo bash -c "echo 'deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-10 main' > /etc/apt/sources.list.d/llvm-sources.list"
      3. Now, you need the GPG key for the repository. This allows your system to trust the packages you’re going to download:
        4. wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
      4. Update the package list again to include the new repository:
        5. sudo apt update
      5. Now, you can install LLVM 10 with:
        6. sudo apt install llvm-10
      6. In case you also need Clang (which is super common!), you can install it with:
        7. sudo apt install clang-10

      Dependencies

      You generally shouldn’t have to worry too much about dependencies with the apt method, as apt will take care of that for you. Just make sure your system is updated before starting.

      Configuration

      After installing LLVM, you usually don’t need to do anything special. But if you want to use llvm-config or link against LLVM in your projects, you might need to add the LLVM binaries to your PATH. You can do that by adding this line to your ~/.bashrc:

      export PATH=/usr/lib/llvm-10/bin:$PATH

      Don’t forget to run source ~/.bashrc to apply the changes!

      Final Thoughts

      That’s pretty much it! This should give you a solid start with LLVM 10 on your Ubuntu machine. If you run into any weird issues or errors, just search for the error message online; there’s a good chance someone has faced the same problem. Happy coding!


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