Branch `trunk`	Branch `4.12`	Branch `4.11`	Branch `4.10`

README

Overview

OCaml is a functional, statically-typed programming language from the ML family, offering a powerful module system extending that of Standard ML and a feature-rich, class-based object system.

OCaml comprises two compilers. One generates bytecode which is then interpreted by a C program. This compiler runs quickly, generates compact code with moderate memory requirements, and is portable to many 32 or 64 bit platforms. Performance of generated programs is quite good for a bytecoded implementation. This compiler can be used either as a standalone, batch-oriented compiler that produces standalone programs, or as an interactive REPL system.

The other compiler generates high-performance native code for a number of processors. Compilation takes longer and generates bigger code, but the generated programs deliver excellent performance, while retaining the moderate memory requirements of the bytecode compiler. The native-code compiler currently runs on the following platforms:

	Tier 1 (actively maintained)	Tier 2 (maintained when possible)
x86 64 bits	Linux, macOS, Windows, FreeBSD	NetBSD, OpenBSD
x86 32 bits	Linux, Windows	FreeBSD, NetBSD, OpenBSD
ARM 64 bits	Linux, macOS	FreeBSD
ARM 32 bits	Linux	FreeBSD, NetBSD, OpenBSD
Power 64 bits	Linux
Power 32 bits	Linux
RISC-V 64 bits	Linux
IBM Z (s390x)	Linux

Other operating systems for the processors above have not been tested, but the compiler may work under other operating systems with little work.

Copyright

All files marked "Copyright INRIA" in this distribution are Copyright © 1996-2021 Institut National de Recherche en Informatique et en Automatique (INRIA) and distributed under the conditions stated in file LICENSE.

Installation

See the file INSTALL.adoc for installation instructions on machines running Unix, Linux, macOS and Cygwin. For native Microsoft Windows, see README.win32.adoc.

Documentation

The OCaml manual is distributed in HTML, PDF, and Emacs Info files. It is available at

https://ocaml.org/releases/latest/manual.html

Availability

The complete OCaml distribution can be accessed at

https://ocaml.org/docs/install.html

Keeping in Touch with the Caml Community

There is an active and friendly discussion forum at

https://discuss.ocaml.org/

The OCaml mailing list is the longest-running forum for OCaml users. You can email it at

caml-list@inria.fr

You can subscribe and access list archives via the Web interface at

https://sympa.inria.fr/sympa/subscribe/caml-list

An alternative archive of the mailing list is also available at

https://inbox.ocaml.org/

There also exist other mailing lists, chat channels, and various other forums around the internet for getting in touch with the OCaml and ML family language community. These can be accessed at

https://ocaml.org/community/

In particular, the IRC channel #ocaml on Libera has a long history and welcomes questions.

Bug Reports and User Feedback

Please report bugs using the issue tracker at https://github.com/ocaml/ocaml/issues

To be effective, bug reports should include a complete program (preferably small) that exhibits the unexpected behavior, and the configuration you are using (machine type, etc).

For information on contributing to OCaml, see HACKING.adoc and CONTRIBUTING.md.

Separately maintained components

Some libraries and tools which used to be part of the OCaml distribution are now maintained separately. Please use the issue trackers at their respective new homes:

The Graphics library (removed in OCaml 4.09)
The Num library (removed in OCaml 4.06)
The OCamlbuild tool (removed in OCaml 4.03)
The camlp4 tool (removed in OCaml 4.02)
The LablTk library (removed in OCaml 4.02)
The CamlDBM library (removed in OCaml 4.00)
The OCamlWinTop Windows toplevel (removed in OCaml 4.00)

License

ocaml-multicore/ocaml

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