CHICKEN is a compiler for the Scheme programming language. It produces portable and efficient C and supports the R5RS and R7RS (work in progress) standards, and many extensions. It runs on Linux, OS X, Windows, many Unix flavours, and aims to be...


Distributed free for use and modification under the BSD License (freedom to user and developer).


Lightweight on dependencies (a C toolchain and GNU Make) and easy to install.


Runs on many platforms, including x86, x86-64, ARM, MIPS, SPARC64 and PowerPC.


Many libraries and extensions are available at Eggs Unlimited and new ones can be easily created.

Well documented

Wiki, Manual and API reference provide updated and detailed documentation about CHICKEN use.

Actively supported

Mailing lists and an IRC channel (#chicken on Libera.Chat) for useful and kind support.

A glimpse of CHICKEN

;;; hello-world.scm
(print "Hello, world!")

;;; Running it interpreted:
$ csi -s hello-world.scm
Hello, world!

;;; Compiling and running the executable binary:
$ csc hello-world.scm

$ ./hello-world
Hello, world!
Get started!