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Chapter 1. LLVM Toolset

LLVM Toolset is a Red Hat offering for developers on Red Hat Enterprise Linux (RHEL). It provides the LLVM compiler infrastructure framework, the Clang compiler for the C and C++ languages, the LLDB debugger, and related tools for code analysis.

LLVM Toolset is available as a module for RHEL 8 and as packages for RHEL 9 and 10.

1.1. LLVM Toolset components
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LLVM Toolset includes the Clang compiler, LLDB debugger, compiler-rt, LLVM core, libomp, LLD linker, and python-lit (version 20.1.8).

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NameVersionDescription

clang

20.1.8

An LLVM compiler front end for C and C++.

lldb

20.1.8

A C and C++ debugger using portions of LLVM.

compiler-rt

20.1.8

Runtime libraries for LLVM and Clang.

llvm

20.1.8

A collection of modular and reusable compiler and toolchain technologies.

libomp

20.1.8

A library for using Open MP API specification for parallel programming.

lld

20.1.8

An LLVM linker.

python-lit

20.1.8

A software testing tool for LLVM- and Clang-based test suites.

Note

The CMake build manager is not part of LLVM Toolset. CMake is available in the system repository. For more information on how to install CMake, see Installing the CMake build manager.

1.2. LLVM Toolset compatibility
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LLVM Toolset is available for Red Hat Enterprise Linux on AMD and Intel 64-bit (x86_64), 64-bit ARM (aarch64), IBM Power Systems, Little Endian (ppc64le), and 64-bit IBM Z (s390x) architectures.

1.3. Installing LLVM Toolset
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Install LLVM Toolset and all dependent packages on Red Hat Enterprise Linux by enabling the llvm-toolset module on RHEL 8 or installing the llvm-toolset package on RHEL 9 and 10.

Prerequisites

  • All available Red Hat Enterprise Linux updates are installed.

Procedure

  1. Install LLVM Toolset:

    • On RHEL 8, enter: 

      # yum module install llvm-toolset
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    • On RHEL 9 and 10, enter: 

      # dnf install llvm-toolset
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  2. To also install the LLDB debugger and the python3-lit package, enter: 

    # dnf install lldb python3-lit
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1.4. LLVM Toolset documentation
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For the official LLVM Toolset documentation, see the upstream documentation.

Note

The llvm-doc package provides only a reference to the upstream documentation.

1.5. Installing the CMake build manager
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The CMake build manager is a tool that manages the build process of your source code independently from your compiler. CMake generates a native build environment to compile source code, create libraries, generate wrappers, and build executable files. Install it by installing the cmake package on your system.

Prerequisites

Procedure

  • Install CMake: 

    # yum install cmake
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1.6. Installing the CMake documentation
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You can install documentation for the CMake build manager on your local system.

Prerequisites

Procedure

  • Install the cmake-doc package: 

    # dnf install cmake-doc
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Verification

  • Open /usr/share/doc/cmake/html/index.html in a browser that is installed on the same host.
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