Install Clang 19 on Ubuntu 24.04

Clang is a compiler for the C, C++, Objective-C, and Objective-C++ programming languages. It is part of the LLVM project, which provides a collection of modular and reusable compiler and toolchain technologies. This tutorial explains how to install Clang 19 on Ubuntu 24.04.

Install Clang

Download the LLVM GPG key:

sudo wget -qO /etc/apt/trusted.gpg.d/apt.llvm.org.asc https://apt.llvm.org/llvm-snapshot.gpg.key

Add the LLVM repository:

echo "deb http://apt.llvm.org/$(lsb_release -sc)/ llvm-toolchain-$(lsb_release -sc) main" | sudo tee /etc/apt/sources.list.d/apt.llvm.org.list

Update the package lists:

sudo apt update

Install the Clang 19 and related tools:

sudo apt install -y clang-19

Verify the installation by checking Clang and Clang++ versions:

clang-19 --version

clang++-19 --version

Testing Clang

Create a main.c file:

nano main.c

Add the following code into main.c:

#include <stdio.h>

int main() {
    printf("Hello world\n");

    return 0;
}

Compile a code:

clang-19 main.c -o test

Run the program:

./test

Uninstall Clang

If you want to completely remove Clang and related dependencies, run the following command:

sudo apt purge --autoremove -y clang-19

Remove GPG key and repository:

sudo rm -rf /etc/apt/trusted.gpg.d/apt.llvm.org.asc

sudo rm -rf /etc/apt/sources.list.d/apt.llvm.org.list