First alpha release of OCaml 5.5.0
Florian Angeletti <[email protected]> Fri, 27 Feb 2026 14:59:56 +0100 (CET)
| Newsgroups | gmane.comp.lang.caml.inria |
|---|---|
| Message-ID | <[email protected]> |
--=_8a85e5e0-388e-4b6d-b5b6-b5b522b7d4b0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Dear OCaml users, Four months after the release of OCaml 5.4.0, the set of new features for the future version 5.5.0 of OCaml has been frozen. We are thus happy to announce the first alpha release for OCaml 5.5.0. This alpha version is here to help fellow hackers join us early in our bug hunting and opam ecosystem fixing fun (see below for the installation instructions). More information about the release process is available at https://github.com/ocaml/ocaml/blob/trunk/release-info/introduction.md. The progress on stabilising the ecosystem is tracked on the "opam readiness for 5.5.0 meta-issue" at - https://github.com/ocaml/opam-repository/issues/29463 There is also a companion alpha opam repository available for this alpha release opam repo add alpha git+https://github.com/kit-ty-kate/opam-alpha-repository.git which contains in-progress alpha releases of opam packages that are being updated for OCaml 5.5.0 . The full release is expected between May and June. There are more information available in the prospective calendar at - https://github.com/ocaml/ocaml/blob/trunk/release-info/calendar.md . If you find any bugs, please report them on OCaml's issue tracker: - https://github.com/ocaml/ocaml/issues If you are interested in the ongoing list of new features and bug fixes, the updated change log for OCaml 5.5.0 is available on GitHub at - https://github.com/ocaml/ocaml/blob/5.5/Changes Happy hacking, Florian Angeletti for the OCaml team Installation Instructions ------------------------------ The base compiler can be installed as an opam switch with the following commands on opam 2.1 and later: opam update opam switch create 5.5.0~alpha1 The source code for the alpha is also available at these addresses: * GitHub: https://github.com/ocaml/ocaml/archive/5.5.0-alpha1.tar.gz * OCaml archives at Inria: https://caml.inria.fr/pub/distrib/ocaml-5.5/ocaml-5.5.0~alpha1.tar.gz Fine-Tuned Compiler Configuration ---------------------------------------------- If you want to tweak the configuration of the compiler, you can switch to the option variant with: opam update opam switch create <switch_name> ocaml-variants.5.5.0~alpha1+options <option_list> where `option_list` is a space separated list of `ocaml-option-*` packages. For instance, for a flambda and no-flat-float-array switch: opam switch create 5.5.0~alpha1+flambda+nffa ocaml-variants.5.5.0~alpha1+options ocaml-option-flambda ocaml-option-no-flat-float-array All available options can be listed with `opam search ocaml-option`. --=_8a85e5e0-388e-4b6d-b5b6-b5b522b7d4b0 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable <html><body><div style=3D"font-family: arial, helvetica, sans-serif; font-s= ize: 12pt; color: #000000"><div>Dear OCaml users,<br><br>Four months after = the release of OCaml 5.4.0, the set of new features for the<br>future versi= on 5.5.0 of OCaml has been frozen. We are thus happy to announce<br>the fir= st alpha release for OCaml 5.5.0.<br><br>This alpha version is here to help= fellow hackers join us early in our bug<br>hunting and opam ecosystem fixi= ng fun (see below for the installation<br>instructions). More information a= bout the release process is available<br>at https://github.com/ocaml/ocaml/= blob/trunk/release-info/introduction.md.<br><br>The progress on stabilising= the ecosystem is tracked on the<br>"opam readiness for 5.5.0 meta-issue" a= t<br><br> - https://github.com/ocaml/opam-repository/issues/29463<br>= <br>There is also a companion alpha opam repository available for this alph= a release<br><br> opam repo add alpha git+https://githu= b.com/kit-ty-kate/opam-alpha-repository.git<br><br>which contains in-progre= ss alpha releases of opam packages that are being updated for<br>OCaml 5.5.= 0 .<br><br>The full release is expected between May and June. There are mor= e information<br>available in the prospective calendar at<br><br> - h= ttps://github.com/ocaml/ocaml/blob/trunk/release-info/calendar.md .<br><br>= If you find any bugs, please report them on OCaml's issue tracker:<br><br>&= nbsp; - https://github.com/ocaml/ocaml/issues<br><br>If you are interested = in the ongoing list of new features and bug fixes, the<br>updated change lo= g for OCaml 5.5.0 is available on GitHub at<br><br> - https://github.= com/ocaml/ocaml/blob/5.5/Changes<br><br>Happy hacking,<br>Florian Angeletti= for the OCaml team<br><br>Installation Instructions<br>-------------------= -----------<br><br>The base compiler can be installed as an opam switch wit= h the following commands<br>on opam 2.1 and later:<br><br> opa= m update<br> opam switch create 5.5.0~alpha1<br><br>The source= code for the alpha is also available at these addresses:<br><br>* GitHub: = https://github.com/ocaml/ocaml/archive/5.5.0-alpha1.tar.gz<br>* OCaml archi= ves at Inria: https://caml.inria.fr/pub/distrib/ocaml-5.5/ocaml-5.5.0~alpha= 1.tar.gz<br><br>Fine-Tuned Compiler Configuration<br>----------------------= ------------------------<br><br>If you want to tweak the configuration of t= he compiler, you can switch to the option variant with:<br><br><br> &= nbsp; opam update<br> opam switch create <switch_name> o= caml-variants.5.5.0~alpha1+options <option_list><br><br><br>where `op= tion_list` is a space separated list of `ocaml-option-*` packages. For inst= ance, for a flambda and no-flat-float-array switch:<br><br><br>  = ; opam switch create 5.5.0~alpha1+flambda+nffa ocaml-variants.5.5.0~alpha1+= options ocaml-option-flambda ocaml-option-no-flat-float-array<br><br><br>Al= l available options can be listed with `opam search ocaml-option`.<br><br><= br><br data-mce-bogus=3D"1"></div></div></body></html> --=_8a85e5e0-388e-4b6d-b5b6-b5b522b7d4b0--