From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Authentication-Results: plum.tunbury.org; dkim=pass (1024-bit key; unprotected) header.d=inria.fr header.i=@inria.fr header.a=rsa-sha256 header.s=dc header.b=s9ko1zSN; dkim-atps=neutral Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=192.134.164.83; helo=mail2-relais-roc.national.inria.fr; envelope-from=caml-list-owner@inria.fr; receiver=tunbury.org Received: from mail2-relais-roc.national.inria.fr (mail2-relais-roc.national.inria.fr [192.134.164.83]) by plum.tunbury.org (Postfix) with ESMTP id 64D40400A6 for ; Fri, 27 Feb 2026 14:00:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=inria.fr; s=dc; h=date:from:to:message-id:mime-version:subject:reply-to: sender:list-id:list-help:list-subscribe:list-unsubscribe: list-post:list-owner:list-archive; bh=1VvF4DK9K12TAmAoxfXgjMqZUUmUgDdIIzp3O8tpwVg=; b=s9ko1zSNR7h3q7xUEFIzQwMdDB0wgLs5LjEHkDu4gkC6i1FFZzYEmCIi +Svm8khqaciJSOvNV5KU1k1f5Iq5Ny3Qbsam4gjnAw909ajcMPNYJxfOi 3ZniYuRnaWwEc+O6wHCG3c19u3Jg12YcuHZR/PiIXwsIB6AGUqWiMBDXh o=; X-CSE-ConnectionGUID: 4Ezz1ZoXTEi/1MlAzGdLHQ== X-CSE-MsgGUID: 6FhxLa0QS8qDPjMs4cSp2A== Authentication-Results: mail2-relais-roc.national.inria.fr; dkim=none (message not signed) header.i=none; spf=SoftFail smtp.mailfrom=caml-list-owner@inria.fr; spf=None smtp.helo=postmaster@prod-sympa-app.inria.fr Received-SPF: SoftFail (mail2-relais-roc.national.inria.fr: domain of caml-list-owner@inria.fr is inclined to not designate 128.93.162.27 as permitted sender) identity=mailfrom; client-ip=128.93.162.27; receiver=mail2-relais-roc.national.inria.fr; envelope-from="caml-list-owner@inria.fr"; x-sender="caml-list-owner@inria.fr"; x-conformance=spf_only; x-record-type="v=spf1"; x-record-text="v=spf1 include:mailout.safebrands.com a:basic-mail.safebrands.com a:basic-mail01.safebrands.com a:basic-mail02.safebrands.com ip4:128.93.142.0/24 ip4:192.134.164.0/24 ip4:128.93.162.160 ip4:128.93.162.3 ip4:128.93.162.88 ip4:89.107.174.7 mx ~all" Received-SPF: None (mail2-relais-roc.national.inria.fr: no sender authenticity information available from domain of postmaster@prod-sympa-app.inria.fr) identity=helo; client-ip=128.93.162.27; receiver=mail2-relais-roc.national.inria.fr; envelope-from="caml-list-owner@inria.fr"; x-sender="postmaster@prod-sympa-app.inria.fr"; x-conformance=spf_only X-IronPort-AV: E=Sophos;i="6.21,314,1763420400"; d="scan'208,217";a="265492429" Received: from prod-sympa-app.inria.fr ([128.93.162.27]) by mail2-relais-roc.national.inria.fr with ESMTP; 27 Feb 2026 15:00:03 +0100 Received: by prod-sympa-app.inria.fr (Postfix, from userid 990) id 5A78C822F0; Fri, 27 Feb 2026 15:00:03 +0100 (CET) Received: from mail2-relais-roc.national.inria.fr (mail2-relais-roc.national.inria.fr [192.134.164.83]) by prod-sympa-app.inria.fr (Postfix) with ESMTP id 98CC782344 for ; Fri, 27 Feb 2026 14:59:56 +0100 (CET) X-CSE-ConnectionGUID: GbFJ/v7YRSCHmhiIbxBO3w== X-CSE-MsgGUID: z/3qksuUR1+oiMr/W1gyeQ== X-ThreatScanner-Verdict: Negative X-IronPort-AV: E=Sophos;i="6.21,314,1763420400"; d="scan'208,217";a="265492304" X-MGA-submission: =?us-ascii?q?MDE3smNgTHMw0diFGjh3nqCzsn6lsK4dGQXJ01?= =?us-ascii?q?vWpLlLXL02JVUFSNtdCV5agMj8VnUIyQxUHuz3vhQo0b3JCZTa6KlSG6?= =?us-ascii?q?c2i4IG0Nu75+wOwUVx9Cd/Yg/EWxULQtI1JZiZpU9hB20dqNp0i9uimk?= =?us-ascii?q?bcYkd3FROo8d7UYLkIkskpGg=3D=3D?= Received: from zcs2-store1.inria.fr ([128.93.142.3]) by mail2-relais-roc.national.inria.fr with ESMTP; 27 Feb 2026 14:59:56 +0100 Date: Fri, 27 Feb 2026 14:59:56 +0100 (CET) From: Florian Angeletti To: caml-list Message-ID: <531163519.17306405.1772200796474.JavaMail.zimbra@inria.fr> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="=_8a85e5e0-388e-4b6d-b5b6-b5b522b7d4b0" X-Originating-IP: [128.93.64.106] X-Mailer: Zimbra 10.1.13_GA_4837 (ZimbraWebClient - FF148 (Linux)/10.1.14_GA_4838) Thread-Index: rL6IL5i7ziGVCVFxCqeVAsh9V0o8ew== Thread-Topic: First alpha release of OCaml 5.5.0 Subject: [Caml-list] First alpha release of OCaml 5.5.0 Reply-To: Florian Angeletti X-Loop: caml-list@inria.fr X-Sequence: 19463 Errors-To: caml-list-owner@inria.fr Precedence: list Precedence: bulk Sender: caml-list-request@inria.fr X-no-archive: yes List-Id: List-Help: , List-Subscribe: , List-Unsubscribe: , List-Post: List-Owner: List-Archive: Archived-At: --=_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 ocaml-variants.5.5.0~alpha1+options 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
Dear OCaml users,

Four months after = the release of OCaml 5.4.0, the set of new features for the
future versi= on 5.5.0 of OCaml has been frozen. We are thus happy to announce
the fir= st 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 fixi= ng fun (see below for the installation
instructions). More information a= bout 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" a= t

  - https://github.com/ocaml/opam-repository/issues/29463
=
There is also a companion alpha opam repository available for this alph= a release

      opam repo add alpha git+https://githu= b.com/kit-ty-kate/opam-alpha-repository.git

which contains in-progre= ss 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 mor= e information
available in the prospective calendar at

  - h= ttps://github.com/ocaml/ocaml/blob/trunk/release-info/calendar.md .

= If you find any bugs, please report them on OCaml's issue tracker:

&= nbsp; - https://github.com/ocaml/ocaml/issues

If you are interested = in the ongoing list of new features and bug fixes, the
updated change lo= g 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 wit= h the following commands
on opam 2.1 and later:

    opa= m 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 archi= ves at Inria: https://caml.inria.fr/pub/distrib/ocaml-5.5/ocaml-5.5.0~alpha= 1.tar.gz

Fine-Tuned Compiler Configuration
----------------------= ------------------------

If you want to tweak the configuration of t= he compiler, you can switch to the option variant with:


  &= nbsp; opam update
    opam switch create <switch_name> o= caml-variants.5.5.0~alpha1+options <option_list>


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:


   = ; 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


Al= l available options can be listed with `opam search ocaml-option`.

<= br>
--=_8a85e5e0-388e-4b6d-b5b6-b5b522b7d4b0--