TheGNU toolchain is a broad collection ofprogramming tools produced by theGNU Project. These tools form atoolchain (a suite of tools used in a serial manner) used for developing softwareapplications andoperating systems.

The GNU toolchain plays a vital role in development ofLinux, someBSD systems, and software forembedded systems. Parts of the GNU toolchain are also directly used with orported to other platforms such asSolaris,macOS,Microsoft Windows (viaCygwin andMinGW/MSYS/WSL2),Sony PlayStation Portable (used byPSP modding scene)^[1] andSony PlayStation 3.^[2]

Projects in the GNU toolchain are:

• GNU Autotools (build system) – Software build toolset from GNU
• GNU Binutils – GNU software development tools for executable code
• GNU Bison – Yacc-compatible parser generator program
• GNU C Library – GNU implementation of the standard C libraryPages displaying short descriptions of redirect targets
• GNU Compiler Collection – Free and open-source compiler for various programming languages
• GNU Debugger – Source-level debugger
• GNUm4 – General-purpose macro processor
• GNUmake – Software build automation tool

• CVS – Historical centralized version control system
• Cross compiler – Cross-platform machine-code compiler
• Cygwin – Unix-like environment for Windows
• Git – Distributed version control software systemPages displaying short descriptions of redirect targets
• GNU Classpath – Implementation of standard class library of Java
• GNU Core Utilities – Package of software containing basic utilities used on Unix-like operating systems
• LLVM – Compiler backend for multiple programming languages
• MinGW – Free and open-source software for developing applications in Microsoft Windows

• GCC, the GNU Compiler Collection
• Building and Installing under Linux
• Prebuilt Win32 GNU Toolchains for various embedded platforms