Set up Clang

This GitHub action sets up Clang & LLVM in your workflow run.

1. Installs either 32-bit or 64-bit Clang & LLVM on either Ubuntu or Windows.
2. Specify a version to install using the version parameter.

Use it in your workflow like this:

- name: Set up Clang
  uses: egor-tensin/setup-clang@v2
  with:
    version: latest
    platform: x64

• latest is the default value for the version parameter and can be omitted.
• x64 is the default value for the platform parameter and can be omitted. Use x86 if you want to build 32-bit binaries.
• cc and c++ executables are set up, pointing to the clang and clang++ executables. Disable this by setting the cc parameter to 0.

API

Input	Value	Default	Description
version	latest	✓	Install the latest version available in the repository.
	any		Install a specific version if it's available (see below).
platform	x64	✓	Install the x86_64 toolchain.
	any		Install the i686 toolchain.
cc	1	✓	Set up cc/clang/c++/clang++ executables.
	any		Don't set up the executables.

Output	Example	Description
clang	clang-4.0	clang binary name
clangxx	clang++-7	clang++ binary name

Supported versions

Unless the version parameter value is "latest", the official LLVM repository is used to make more versions available. You can pass the version number as the version parameter value (5.0, 8, 9, etc.), and this action will install the corresponding packages.

The version parameter value is not checked for being an available version for the current distribution. The supported versions for a particular distribution are those found in that distro's repositories & those in the LLVM repository. For example, you can find the list of available versions as of December 2025 below.

version	Jammy	Noble
11	✓
12	✓
13	✓
14	✓	✓
15	✓	✓
16	✓	✓
17	✓	✓
18	✓	✓
19	✓	✓
20	✓	✓
21	✓	✓

This table should be updated periodically; it's a work-in-progress. (Note to self: the supported versions are those found in Ubuntu repos and the official LLVM repos).

On Windows, the version parameter is ignored.

License

Distributed under the MIT License. See LICENSE.txt for details.