From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <jwakely.gcc@gmail.com>
Received: from mail-wr1-x430.google.com (mail-wr1-x430.google.com
 [IPv6:2a00:1450:4864:20::430])
 by sourceware.org (Postfix) with ESMTPS id 937413857BB2
 for <gcc-help@gcc.gnu.org>; Tue, 31 May 2022 09:20:57 +0000 (GMT)
DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 937413857BB2
Received: by mail-wr1-x430.google.com with SMTP id h5so9717818wrb.0
 for <gcc-help@gcc.gnu.org>; Tue, 31 May 2022 02:20:57 -0700 (PDT)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=1e100.net; s=20210112;
 h=x-gm-message-state:mime-version:references:in-reply-to:from:date
 :message-id:subject:to:cc;
 bh=xVtTqcpNQHAiJ6MxXXbPTETErriy43fwZ9k24J/BrT4=;
 b=qDgmki7kE1kX+TWyZzNMvwBMFIZhTaAsj1iKjcjc6QEPm9s2OvEOgzvuSc0zTYJDL9
 JMoOIOrfnlvKjyG8ir+yUOfvqEbTiOhEIJveyCBURDCXuHGS1LvkpTtXtj4152UPTCGK
 wrCA9VlJ1mZ+l3ql5H6QPU70g+EP5g26WTxXIMoU9QcUQGf6P6vuS5VGkr+oFy7yFa+d
 irW4p+pAIo5X+hxb/eBHLwa5b3uZMWoLDvjLH3s9jWaHpRDrX3etWE/Vp/DMRhR76aVa
 22HBHOJwqiDBBGK/OWqJbI0UOiv5jdpPhtOGZV6iYY0Nlv7kXEHkQh6rXP9Oe6LtB+/y
 1uQA==
X-Gm-Message-State: AOAM532gmvoolJeks40N1L/AInB4WjvQxve9+s26De1ody6/GItpO5p7
 W5wArP32PikFK00/afhLIGCYyQNRPwVNirWayxk=
X-Google-Smtp-Source: ABdhPJyln9NsRBU7pamFF0Ab0kwaQ3YZ79PT/tOEwlhBI5ujUJBbOMKt16AZc2K5HlrmcLq976uwHWCVXvUPbYhId3A=
X-Received: by 2002:a05:6000:1812:b0:210:2eb1:4606 with SMTP id
 m18-20020a056000181200b002102eb14606mr10101354wrh.593.1653988855884; Tue, 31
 May 2022 02:20:55 -0700 (PDT)
MIME-Version: 1.0
References: <CAA01Csq+dGhDrf5UTbUXbMPbCV=M1MFUHQtb7dWF6M8wcenTAw@mail.gmail.com>
In-Reply-To: <CAA01Csq+dGhDrf5UTbUXbMPbCV=M1MFUHQtb7dWF6M8wcenTAw@mail.gmail.com>
From: Jonathan Wakely <jwakely.gcc@gmail.com>
Date: Tue, 31 May 2022 09:20:43 +0000
Message-ID: <CAH6eHdQW+B1e=S-PLpwB25BuxuKVBPrX_-fR+Ut-hFTJaN1rPg@mail.gmail.com>
Subject: Re: Format of Compiled Module Interface (gcm file - c++20 modules) ?
To: Piotr Krukowiecki <piotr.krukowiecki@gmail.com>
Cc: gcc-help <gcc-help@gcc.gnu.org>
X-Spam-Status: No, score=-0.8 required=5.0 tests=BAYES_00, DKIM_SIGNED,
 DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, HTML_MESSAGE,
 KAM_SHORT, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP,
 T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
 server2.sourceware.org
Content-Type: text/plain; charset="UTF-8"
X-Content-Filtered-By: Mailman/MimeDel 2.1.29
X-BeenThere: gcc-help@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-help mailing list <gcc-help.gcc.gnu.org>
List-Unsubscribe: <https://gcc.gnu.org/mailman/options/gcc-help>,
 <mailto:gcc-help-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-help/>
List-Post: <mailto:gcc-help@gcc.gnu.org>
List-Help: <mailto:gcc-help-request@gcc.gnu.org?subject=help>
List-Subscribe: <https://gcc.gnu.org/mailman/listinfo/gcc-help>,
 <mailto:gcc-help-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Tue, 31 May 2022 09:20:59 -0000

On Mon, 30 May 2022, 16:03 Piotr Krukowiecki via Gcc-help, <
gcc-help@gcc.gnu.org> wrote:

> Hi,
>
> is there a description of .gcm file content?
>
> I've read
> https://gcc.gnu.org/onlinedocs/gcc/C_002b_002b-Compiled-Module-Interface.html
> so I understand it's ELF32 file, but I'd like to understand what's
> kept inside and how. For example, an inline function body may be
> present inside CMI, I'd like to know how to find it and parse it.
>
> It seems that gcc implementation is in
> https://github.com/gcc-mirror/gcc/blob/master/gcc/cp/module.cc but is
> the code the only documentation?
>

There's also https://gcc.gnu.org/wiki/cxx-modules and Nathan Sidwell's GNU
Cauldron and cppcon talks.

>
>