software catalog

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+---
+title: "Clang"
+category: "Languages and runtimes"
+tagline: "The LLVM compiler for C, C++ and Objective-C, alongside Arch's standard build tools."
+source: "pacman"
+package: "clang"
+command: "clang"
+website: "https://clang.llvm.org/"
+code: "https://github.com/llvm/llvm-project"
+---
+
+## What it is
+
+Clang is a compiler for C, C++ and Objective-C, part of the LLVM project. It turns source code into programs, with clear error messages and fast compiles, and comes with tools such as `clang-format` for formatting code and `clang-tidy` for finding bugs. It's the default compiler on macOS and is used to build Chrome and Firefox.
+
+## Why it's here
+
+- **Readable errors.** Its messages point to the exact spot and often suggest the fix.
+- **Needed for builds.** Some software compiles only with Clang, or needs its libraries.
+- **Code tools.** Formatting and static analysis for C and C++ projects.
+
+## On CoreDesktop
+
+Clang is installed from pacman. CoreDesktop includes it, with [CMake](/software/cmake/), because Hermes Agent's Matrix support builds a library that needs `clang++`. CoreDesktop also installs `base-devel`, Arch's group of build tools: GCC, make, pkgconf and the rest of what's needed to compile software and build AUR packages. `update` keeps them all current with the rest of the pacman packages.