macOS
Homebrewverified · 100%
brew install llvm@21local Homebrew formula metadata
MacPortsverified · 94%
sudo port install llvm-21MacPorts ports tree · lang/llvm-21/Portfile · source: api.github.com
brew
Install llvm@21 with Homebrew, MacPorts, apk, dnf, pacman, zypper, chocolatey, apt, Nix, scoop, winget
Next-gen compiler infrastructure. Version 21.1.8 via Homebrew; verified 2026-06-25.
install
Additional install commands
Linux
Alpine Linux apkverified · 92%
sudo apk add llvm21Alpine Linux edge package indexes · llvm21 · source: dl-cdn.alpinelinux.org
Fedora dnfverified · 92%
sudo dnf install clang21Fedora Rawhide package metadata · clang21 · source: dl.fedoraproject.org
Arch Linux pacmanverified · 92%
sudo pacman -S llvm21Arch Linux sync databases · llvm21 · source: geo.mirror.pkgbuild.com
openSUSE zypperverified · 92%
sudo zypper install clang21openSUSE Tumbleweed package metadata · clang21 · source: download.opensuse.org
Debian aptverified · 92%
sudo apt install llvmDebian stable package indexes · llvm · source: deb.debian.org
Nixverified · 92%
nix profile install nixpkgs#llvmnixpkgs package indexes · llvm · source: raw.githubusercontent.com
Windows
Chocolateyverified · 92%
choco install llvmChocolatey community package catalog · llvm · source: community.chocolatey.org
Scoopverified · 92%
scoop install main/llvmScoop official bucket manifest trees · bucket/llvm.json · source: api.github.com
Windows Package Managerverified · 92%
winget install --id LLVM.LLVM -eWindows Package Manager source index · LLVM.LLVM · source: cdn.winget.microsoft.com
overview
Package summary
Next-gen compiler infrastructure
Project links
Commands and aliases
- clang-21
history
Project history and usage
LLVM 21 is the Homebrew versioned formula for the LLVM 21.x compiler infrastructure series, including Clang, LLVM command-line tools, LLD, MLIR tools, and related toolchain components.
Project history
LLVM began as a University of Illinois research project to provide a modern SSA-based compilation strategy for static and dynamic compilation. The project made its 1.0 release in October 2003 and later grew into an umbrella for compiler, debugger, runtime, linker, and analysis subprojects.
The upstream project describes LLVM as a collection of modular and reusable compiler and toolchain technologies rather than a single compiler. Its core libraries provide optimizer and code-generation infrastructure around LLVM IR, while Clang, LLD, LLDB, libc++, compiler-rt, MLIR, OpenMP, and other subprojects build on that base.
Adoption history
LLVM moved from academic compiler infrastructure into mainstream production use across commercial, open source, and research projects. The project highlights external users spanning language implementations, JITs, static analysis tools, linkers, debuggers, and high-performance computing toolchains.
For package managers, LLVM's release train and large set of CLI tools made it a common versioned dependency. Versioned formulae such as llvm@21 let users pin a major compiler stack while newer major releases continue to land.
How it is used
Package users install LLVM for Clang and clang++, clang-format, clang-tidy, clangd, LLD, llvm-ar, llvm-objdump, llvm-config, opt, llc, FileCheck, MLIR tools, and many other compiler-development utilities. Upstream getting-started documentation centers on cloning llvm-project, configuring with CMake, and selecting enabled subprojects such as clang and lld.
Clang is documented as a C, C++, and Objective-C compiler driver that handles preprocessing, parsing, optimization, code generation, assembly, and linking, while transparently invoking lower-level compiler and linker tools.
Why package nerds care
LLVM is one of the canonical package-manager stress tests: huge source trees, many binaries, CMake builds, multiple runtime libraries, and a steady major-version cadence. Versioned formulae matter because downstream projects often need a specific Clang/LLVM ABI or tool behavior.
LLVM 21 is a recent pinned major for users who want a modern LLVM stack without tracking the latest release. It is useful in package sets that carry several LLVM majors so source builds can choose the compiler API, optimizer behavior, and clang tool versions they were tested with.
Timeline
- 2000: LLVM starts as a University of Illinois research project.
- 2003-10-24: LLVM 1.0 is released.
- 2012: LLVM receives the ACM Software System Award.
- 2025-08-26: LLVM 21.1.0 is released.
- 2025: Homebrew exposes LLVM 21 through the versioned llvm@21 formula.
Related projects
- Clang, LLD, LLDB, libc++, compiler-rt, MLIR, OpenMP, Flang, BOLT, and the monorepo at github.com/llvm/llvm-project are the main related upstream projects.
Sources
security posture
No protected-tool coverage found yet
No matching local secret-handling manifest was found for llvm@21. Nucleus package metadata is still published here so future coverage has a stable package URL.
Install behavior
- Homebrew declares a post-install hook for this formula.
- Homebrew bottle metadata is available for 6 platform targets.
- Installs with 1 runtime dependencies.
- Build metadata lists 3 build dependencies.
Recommended review
Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.
executables
Installed executables
| Command | Kind | Exposure | Note |
|---|---|---|---|
clang-21 | cli | global executable |
freshness
Version and freshness
These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.
page generated2026-07-08
manager version21.1.8
manager updated2026-06-25
local dataok
upstreamnot checked
latest detectednot detected
https://github.com/llvm/llvm-project
- infoNo cached GitHub release or tag data was available.https://github.com/llvm/llvm-projectnone confidence
install metadata
Package metadata
| Package key | brew:llvm@21 |
|---|---|
| Version | 21.1.8 |
| Package manager | Homebrew |
| Package manager page | https://formulae.brew.sh/formula/llvm@21 |
| Homepage | https://llvm.org/ |
| Repository | https://github.com/llvm/llvm-project |
| Upstream docs | https://llvm.org/docs |
| License | Apache-2.0 WITH LLVM-exception |
| Source archive | https://github.com/llvm/llvm-project/releases/download/llvmorg-21.1.8/llvm-project-21.1.8.src.tar.xz |
| Last updated | 2026-06-25T13:37:50+02:00 |
| Pulse | updated |
| Dependencies | zstd |
| Build dependencies | cmake, ninja, python@3.14 |
| Uses from macOS | libedit, libffi |
| Bottle | available (on arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, x86_64_linux) |
| Homebrew post-install | defined |
| Service | none declared |
| Caveats | CLANG_CONFIG_FILE_SYSTEM_DIR: $HOMEBREW_PREFIX/etc/clang CLANG_CONFIG_FILE_USER_DIR: ~/.config/clang LLD is now provided in a separate formula: brew install lld@21 Using `clang`, `clang++`, etc., requires a CLT installation at `/Library/Developer/CommandLineTools`. If you don't want to install the CLT, you can write appropriate configuration files pointing to your SDK at ~/.config/clang. To use the bundled libunwind please use the following LDFLAGS: LDFLAGS="-L$HOMEBREW_PREFIX/opt/llvm@21/lib/unwind -lunwind" To use the bundled libc++ please use the following LDFLAGS: LDFLAGS="-L$HOMEBREW_PREFIX/opt/llvm@21/lib/c++ -L$HOMEBREW_PREFIX/opt/llvm@21/lib/unwind -lunwind" Features newer than system libc++ will require the following define to enable: CPPFLAGS="-D_LIBCPP_DISABLE_AVAILABILITY" NOTE: You probably want to use the libunwind and libc++ provided by macOS unless you know what you're doing. |
registry facts
Source database details
| Source Database | Homebrew formula API |
|---|---|
| Tap | homebrew/core |
| Full Name | llvm@21 |
| Version Scheme | 0 |
| Revision | 0 |
| Bottle Stable Root URL | https://ghcr.io/v2/homebrew/core |
| Deprecated | no |
| Disabled | no |
| Keg Only | yes |
| URL Keys |
|
source database matches
Other package-manager records
Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.
MacPorts95%
llvm-21
sudo port install llvm-21- normalized package name match
- Matched by: Llvm 21
apk92%
llvm21 21.1.8-r1
Low Level Virtual Machine compiler system, version 21
sudo apk add llvm21- License: Apache-2.0
- Architecture: x86_64
- Source Package: llvm21
- 1 dependencies
- 1 provides
- package manager index match
- Matched by: Llvm21
apk92%
llvm21-dev 21.1.8-r1
Low Level Virtual Machine compiler system, version 21 (development files)
sudo apk add llvm21-dev- License: Apache-2.0
- Architecture: x86_64
- Source Package: llvm21
- 1 dependencies
- 1 provides
- package manager index match
- Matched by: Llvm21
apk92%
llvm21-gtest 21.1.8-r1
LLVM 21 gtest static libraries
sudo apk add llvm21-gtest- License: Apache-2.0
- Architecture: x86_64
- Source Package: llvm21
- package manager index match
- Matched by: Llvm21
apk92%
llvm21-libs 21.1.8-r1
LLVM 21 runtime library
sudo apk add llvm21-libs- License: Apache-2.0
- Architecture: x86_64
- Source Package: llvm21
- 1 dependencies
- 1 provides
- package manager index match
- Matched by: Llvm21
apk92%
llvm21-linker-tools 21.1.8-r1
Low Level Virtual Machine compiler system, version 21 (linker plugins)
sudo apk add llvm21-linker-tools- License: Apache-2.0
- Architecture: x86_64
- Source Package: llvm21
- 1 dependencies
- package manager index match
- Matched by: Llvm21
apk92%
llvm21-static 21.1.8-r1
LLVM 21 static libraries
sudo apk add llvm21-static- License: Apache-2.0
- Architecture: x86_64
- Source Package: llvm21
- package manager index match
- Matched by: Llvm21
apk92%
llvm21-test-utils 21.1.8-r1
LLVM 21 utilities for executing LLVM and Clang style test suites
sudo apk add llvm21-test-utils- License: Apache-2.0
- Architecture: x86_64
- Source Package: llvm21
- 1 dependencies
- 1 provides
- package manager index match
- Matched by: Llvm21
apk92%
llvm21-test-utils-pyc 21.1.8-r1
Precompiled Python bytecode for llvm21-test-utils
sudo apk add llvm21-test-utils-pyc- License: Apache-2.0
- Architecture: x86_64
- Source Package: llvm21
- 1 dependencies
- package manager index match
- Matched by: Llvm21
dnf92%
clang21 21.1.8-6.fc45
A C language family front-end for LLVM
sudo dnf install clang21- License: Apache-2.0 WITH LLVM-exception OR NCSA
- Category: Unspecified
- Architecture: i686
- Source Package: llvm21
- 10 dependencies
- 2 provides
- package manager index match
- Matched by: Llvm21
dnf92%
clang21-analyzer 21.1.8-6.fc45
A source code analysis framework
sudo dnf install clang21-analyzer- License: Apache-2.0 WITH LLVM-exception OR NCSA OR MIT
- Category: Unspecified
- Architecture: x86_64
- Source Package: llvm21
- 4 dependencies
- 1 provides
- package manager index match
- Matched by: Llvm21
dnf92%
clang21-devel 21.1.8-6.fc45
Development header files for clang
sudo dnf install clang21-devel- License: Apache-2.0 WITH LLVM-exception OR NCSA
- Category: Unspecified
- Architecture: i686
- Source Package: llvm21
- 12 dependencies
- 2 provides
- package manager index match
- Matched by: Llvm21
dnf92%
clang21-libs 21.1.8-6.fc45
Runtime library for clang
sudo dnf install clang21-libs- License: Apache-2.0 WITH LLVM-exception OR NCSA
- Category: Unspecified
- Architecture: i686
- Source Package: llvm21
- 9 dependencies
- 3 provides
- package manager index match
- Matched by: Llvm21
dnf92%
clang21-resource-filesystem 21.1.8-6.fc45
Filesystem package that owns the clang resource directory
sudo dnf install clang21-resource-filesystem- License: Apache-2.0 WITH LLVM-exception OR NCSA
- Category: Unspecified
- Architecture: i686
- Source Package: llvm21
- 3 provides
- package manager index match
- Matched by: Llvm21
dnf92%
clang21-tools-extra 21.1.8-6.fc45
Extra tools for clang
sudo dnf install clang21-tools-extra- License: Apache-2.0 WITH LLVM-exception OR NCSA
- Category: Unspecified
- Architecture: i686
- Source Package: llvm21
- 13 dependencies
- 1 provides
- package manager index match
- Matched by: Llvm21
dnf92%
clang21-tools-extra-devel 21.1.8-6.fc45
Development header files for clang tools
sudo dnf install clang21-tools-extra-devel- License: Apache-2.0 WITH LLVM-exception OR NCSA
- Category: Unspecified
- Architecture: i686
- Source Package: llvm21
- 1 dependencies
- 1 provides
- package manager index match
- Matched by: Llvm21
source trail
Generated from repository data
This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.
Combined YAML source
View the package source record on GitHub.
Used sources
- Nucleus package database
- cross-ecosystem install command graph
- curated package history
- external package-manager database matches
- package relationship graph
- package version freshness
- package-page enrichment