Cbindgen
Cbindgen is a command-line tool that generates C or C++ header files (bindings) from Rust code, enabling interoperability between Rust and other languages like C, C++, or Python. It automatically creates FFI (Foreign Function Interface) declarations by parsing Rust source files, including structs, enums, and functions marked with #[no_mangle] or similar attributes. This simplifies the process of integrating Rust libraries into existing C/C++ projects or building cross-language applications.
Developers should use Cbindgen when they need to expose Rust functionality to C or C++ codebases, such as in embedded systems, game engines, or legacy software where Rust is used for performance-critical components. It is particularly useful for projects that require safe and efficient FFI without manual header writing, reducing errors and saving time in cross-language development. For example, when building a Rust library for a C-based application or creating bindings for Python extensions via tools like PyO3.