From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Original-To: caml-list@sympa.inria.fr Delivered-To: caml-list@sympa.inria.fr Received: from mail2-relais-roc.national.inria.fr (mail2-relais-roc.national.inria.fr [192.134.164.83]) by sympa.inria.fr (Postfix) with ESMTPS id 1DDF67EE51 for ; Tue, 9 Apr 2013 14:18:51 +0200 (CEST) Received-SPF: None (mail2-smtp-roc.national.inria.fr: no sender authenticity information available from domain of jdimino@janestreet.com) identity=pra; client-ip=38.105.200.229; receiver=mail2-smtp-roc.national.inria.fr; envelope-from="jdimino@janestreet.com"; x-sender="jdimino@janestreet.com"; x-conformance=sidf_compatible Received-SPF: Pass (mail2-smtp-roc.national.inria.fr: domain of jdimino@janestreet.com designates 38.105.200.229 as permitted sender) identity=mailfrom; client-ip=38.105.200.229; receiver=mail2-smtp-roc.national.inria.fr; envelope-from="jdimino@janestreet.com"; x-sender="jdimino@janestreet.com"; x-conformance=sidf_compatible; x-record-type="v=spf1" Received-SPF: None (mail2-smtp-roc.national.inria.fr: no sender authenticity information available from domain of postmaster@tot-dmz-mxout1.janestreet.com) identity=helo; client-ip=38.105.200.229; receiver=mail2-smtp-roc.national.inria.fr; envelope-from="jdimino@janestreet.com"; x-sender="postmaster@tot-dmz-mxout1.janestreet.com"; x-conformance=sidf_compatible X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AoMBACkGZFEmacjlnGdsb2JhbABRxH6BCh4OAQEBAQEICwkJFCiCHwEBBUABATcBDwsLDS4iEgEFARwGEwiIDAOgBYpvgzGBCgEFjycGjm8zB4NBlnePKxYphC8 X-IPAS-Result: AoMBACkGZFEmacjlnGdsb2JhbABRxH6BCh4OAQEBAQEICwkJFCiCHwEBBUABATcBDwsLDS4iEgEFARwGEwiIDAOgBYpvgzGBCgEFjycGjm8zB4NBlnePKxYphC8 X-IronPort-AV: E=Sophos;i="4.87,438,1363129200"; d="scan'208";a="12471397" Received: from mx5.janestreet.com (HELO tot-dmz-mxout1.janestreet.com) ([38.105.200.229]) by mail2-smtp-roc.national.inria.fr with ESMTP/TLS/DHE-RSA-AES256-SHA; 09 Apr 2013 14:18:50 +0200 Received: from tot-oib-smtp1.delacy.com ([172.27.22.15] helo=tot-smtp) by tot-dmz-mxout1.janestreet.com with esmtp (Exim 4.76) (envelope-from ) id 1UPXVf-0005LQ-HA for caml-list@inria.fr; Tue, 09 Apr 2013 08:18:47 -0400 Received: from tot-dmz-mxgoog1.delacy.com ([172.27.224.14] helo=mxgoog2.janestreet.com) by tot-smtp with esmtps (TLSv1:AES256-SHA:256) (Exim 4.72) (envelope-from ) id 1UPXVf-0003iw-GQ for caml-list@inria.fr; Tue, 09 Apr 2013 08:18:47 -0400 Received: from mail-ie0-f200.google.com ([209.85.223.200]) by mxgoog2.janestreet.com with esmtp (Exim 4.76) (envelope-from ) id 1UPXVf-0005kw-DM for caml-list@inria.fr; Tue, 09 Apr 2013 08:18:47 -0400 Received: by mail-ie0-f200.google.com with SMTP id c11so38946432ieb.3 for ; Tue, 09 Apr 2013 05:18:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=janestreet.com; s=google; h=x-received:mime-version:x-received:in-reply-to:references:date :message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=8KwPJKaq/2tigQk0BaHsBV/uPsm0MDaUDKUAQDozmTs=; b=mZwBf6qaXFinMdDpXTvWAtymCIg3YQKI+AglKyIyOFPZcjvCqLktTnI6mSQ/BmJpXk U+N6320S2gUpePMF4B/Hv2EM4Vw0QhBlXyLMNZqhx6AWIlEz9IyIge8Hxn3e2C0R/83c fbJ/BzNZAwuDP2K6EzqoZlYQ2z+U5UDrydQzQ= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-received:mime-version:x-received:in-reply-to:references:date :message-id:subject:from:to:cc:content-type :content-transfer-encoding:x-gm-message-state; bh=8KwPJKaq/2tigQk0BaHsBV/uPsm0MDaUDKUAQDozmTs=; b=Y5qiLPH6FE6WYvy7c7wTnycbMSNzL+XtLKfewSOZ9DSv/wM9mRvwrJJl7vKP7p0eLn ZT3hJb3LYmtO3nnC7V+pPRgARbjMHhHX+OYippQx35xba9XyyPTqQO/8QMEgltehIn6k tt1rlcR2qySN+NthIxsSfFuZ7G0Y/IABE/G5adI5fS65cwLsKF77T8aGFBAHAzteSPaj 1vfMyJHt74ko9cOitrYY1XDLy8NnPGeimIvoUBOpePeMjXdEpiUIu7ghEHIcs/FGnNSU 30ulO1pVrKzGnLnLByeuysUI4rQ7Qj7CDEimAUQRa+jbaCuaOXK+H8xo2ovbP/V1ZRKy 3aug== X-Received: by 10.50.80.6 with SMTP id n6mr9558360igx.32.1365509927049; Tue, 09 Apr 2013 05:18:47 -0700 (PDT) MIME-Version: 1.0 X-Received: by 10.50.80.6 with SMTP id n6mr9558352igx.32.1365509926968; Tue, 09 Apr 2013 05:18:46 -0700 (PDT) Received: by 10.50.70.6 with HTTP; Tue, 9 Apr 2013 05:18:46 -0700 (PDT) In-Reply-To: References: Date: Tue, 9 Apr 2013 13:18:46 +0100 Message-ID: From: Jeremie Dimino To: =?ISO-8859-1?Q?=C9tienne_Andr=E9?= Cc: caml-list@inria.fr Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Gm-Message-State: ALoCoQkMfnT5Fo1Kwf+VOVC7HFGBk56HKoKbOAinfRWBd6C2FNPtzV8Ig3rnh1n+PuAW8oSWUaAbiUTLZ9qKki9H55bW2h33iEO57K8z49fS3/wWWdwWwzC8PGmP2k/AerW3bw1HkGxvBr0C0mR3M4gDBAcxNEFK0w== Subject: Re: [Caml-list] Build number and date in OCaml? Hi Etienne, On Tue, Apr 9, 2013 at 12:38 PM, =C9tienne Andr=E9 wrote: > I've been using OCaml for a couple of years, but without using any advanc= ed > feature; so my question may be a little naive. > Is there any way to insert easily the current date and time of compiling,= as > well as, e.g., an incremental build number in an OCaml program? > So that it is printed at runtime, e.g., in the program header. > > I quite stupidly used the Unix.gettimeofday() function before realizing t= hat > it is of course executed at runtime. > > Of course, I could do it using an external script that would modify the > OCaml source code before compiling, but is there any native OCaml feature > for achieving this in a cleaner manner? I don't know of such a feature. One thing you can do is to write a small camlp4/ppx extension that will replace for instance BUILD_DATE by the current date. But I think the standard way to have the build date/number at runtime is to generate a small file containing this information and link it with the other units. If you don't want to recompile everything every time the date changes, just make sure that the other units do not depend on the implementation on this file (i.e. they must not see the .cmx), or generate a C file instead of a .ml file. Cheers, --=20 Jeremie