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README

Overview

OCaml is an implementation of the ML language, based on the Caml Light dialect extended with a complete class-based object system and a powerful module system in the style of Standard ML.

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 essentially any 32 or 64 bit Unix platform. 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, toplevel-based 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 used and maintained by the core OCaml team):

AMD64 (Opteron)

Linux, OS X, MS Windows

IA32 (Pentium)

Linux, FreeBSD, OS X, MS Windows

PowerPC

Linux, OS X

ARM

Linux

Tier 2 (maintained when possible, with help from users):

AMD64

FreeBSD, OpenBSD, NetBSD

IA32 (Pentium)

NetBSD, OpenBSD, Solaris 9

PowerPC

NetBSD

ARM

NetBSD

RISC-V

Linux

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

Before the introduction of objects, OCaml was known as Caml Special Light. OCaml is almost upwards compatible with Caml Special Light, except for a few additional reserved keywords that have forced some renaming of standard library functions.

Copyright

All files marked "Copyright INRIA" in this distribution are copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 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, OS X and Cygwin. For native Microsoft Windows, see README.win32.adoc.

Documentation

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

Availability

The complete OCaml distribution can be accessed at

Keeping in Touch with the Caml Community

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

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

You can also access a newer discussion forum at

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

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

Bug Reports and User Feedback

Please report bugs using the Web interface to the bug-tracking system at http://caml.inria.fr/bin/caml-bugs

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).

You can also contact the implementors directly at [email protected].

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