Editing Modula-3 (section)

==Implementations==
Several compilers are available, most of them [[Open-source model|open source]].

*DEC-SRC M3, the original.<ref>[ftp://ftp.u-aizu.ac.jp/pub/lang/Modula/m3/faq/document/src-m3-doc/SRCm3-3.3.ps.gz SRC Modula-3 3.3]{{dead link|date=May 2025|bot=medic}}{{cbignore|bot=medic}} Bill Kalsow and Eric Muller. Digital Equipment Corporation (January 1995)</ref>
*Olivetti Research Center (ORC) Modula-3 toolkit, originally a compiler, now available as a library for syntactic, lexical and semantic analysis of Modula-3 programs.<ref>{{Cite journal
| doi = 10.1145/99278.99285
| volume = 15
| issue = 6
| pages = 66–76
| last = Jordan
| first = Mick
| title = An extensible programming environment for Modula-3
| journal = SIGSOFT Softw. Eng. Notes
| year = 1990
| doi-access = free
}}</ref>
*Critical Mass CM3, a different successor of DEC-SRC M3
*Polytechnique Montreal Modula-3 PM3, a successor of DEC-SRC M3, currently merging with CM3
*EzM3, an independent lightweight and easily portable implementation, developed in connection with [[CVSup]]
*HM3, a successor of the pm3-1.1.15 release of PM3, with support of native threading using [[NPTL]]
*CM3,<ref>[http://www.opencm3.net  Critical Mass Modula-3 Web]</ref><ref>[https://github.com/modula3/cm3 CM3 repo]</ref> the successor to Critical Mass CM3. Based on an old version of [[GNU Compiler Collection|GCC]], PM3 and CAM3 derive from SRC M3. This is the only up to date, maintained and developed implementation.

Since the only aspect of C data structures that is missing from Modula-3 is the union type, all extant Modula-3 implementations are able to provide good [[binary code]] compatibility with C language type declarations of [[Array data structure|arrays]] and [[Record (computer science)|structs]].