RISC-V port of the OCaml system
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bytecomp Full explanation for unsafe cycles in recursive modules (#2058) Oct 1, 2018
compilerlibs add a file in compilerlibs to make git happy Feb 19, 2016
config Add RISC-V backend Oct 2, 2018
flexdll @ 7f565ef
lex Merge pull request #2049 from hhugo/lexer3 Sep 17, 2018
man Introduce and use ROOTDIR in more makefiles Sep 17, 2018
middle_end ident: hide stamp related functions from the interface Sep 21, 2018
ocamltest Move config/Makefile to Makefile.config Sep 17, 2018
otherlibs Introduce and use ROOTDIR in more makefiles Sep 17, 2018
runtime Adapt to changes in trunk Oct 2, 2018
stdlib Fix typo in Scanf docs Sep 21, 2018
testsuite Full explanation for unsafe cycles in recursive modules (#2058) Oct 1, 2018
tools GPR#2056 (Backend_var) Sep 28, 2018
toplevel consistently make temporary local type idents local idents Sep 21, 2018
typing move refresh_signature out of Subst, add Env.enter_signature Sep 21, 2018
utils GPR#2076 (Targetint.print) (#2076) Sep 28, 2018
.depend GPR#2056 (Backend_var) Sep 28, 2018
.depend.menhir add a .depend.menhir file for menhir parser dependencies Sep 1, 2018
.gitattributes Remove spurious blank lines in .gitattributes Sep 25, 2018
.gitmodules clean up whitespace and cut long lines Feb 17, 2016
.merlin .merlin: add forgotten dir Jun 29, 2018
.ocp-indent Adding an ocp-indent customization file for the project. Sep 11, 2013
BOOTSTRAP.adoc Merge the asmrun and byterun directories into the runtime directory Jun 28, 2018
CONTRIBUTING.md Supply a Git pre-commit hook for tools/check-typo Jun 30, 2018
HACKING.adoc remove experimental/ Sep 8, 2018
INSTALL.adoc Move config/Makefile to Makefile.config Sep 17, 2018
LICENSE Update the LICENSE file to reflect new licensing conditions (LGPLv2.1) May 14, 2016
Makefile GPR#2056 (Backend_var) Sep 28, 2018
Makefile.common Move config/Makefile to Makefile.config Sep 17, 2018
Makefile.tools Move config/Makefile to Makefile.config Sep 17, 2018
README.adoc Add RISC-V backend Oct 2, 2018
appveyor.yml Split the AppVeyor build into two jobs Sep 7, 2018


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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


Linux, OS X



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


FreeBSD, OpenBSD, NetBSD

IA32 (Pentium)

NetBSD, OpenBSD, Solaris 9







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.

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.


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.


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


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 caml@inria.fr.

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