From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-1.mimecast.com (us-smtp-delivery-1.mimecast.com [205.139.110.120]) by sourceware.org (Postfix) with ESMTP id 3205E3858D34 for ; Fri, 26 Jun 2020 19:58:24 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 3205E3858D34 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-312-BR-W2wQ5NImrfXSP2rfdlA-1; Fri, 26 Jun 2020 15:58:16 -0400 X-MC-Unique: BR-W2wQ5NImrfXSP2rfdlA-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id EFF2110059A3 for ; Fri, 26 Jun 2020 19:58:15 +0000 (UTC) Received: from redhat.com (ovpn-117-59.rdu2.redhat.com [10.10.117.59]) by smtp.corp.redhat.com (Postfix) with ESMTPS id ABFA519C4F for ; Fri, 26 Jun 2020 19:58:15 +0000 (UTC) Date: Fri, 26 Jun 2020 15:58:13 -0400 From: Marek Polacek To: GCC Patches Subject: Re: PSA: Default C++ dialect is now C++17 Message-ID: <20200626195813.GC3394@redhat.com> References: <20200626193409.GB3394@redhat.com> MIME-Version: 1.0 In-Reply-To: <20200626193409.GB3394@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Spam-Status: No, score=-15.9 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_NUMSUBJECT, KAM_SHORT, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 26 Jun 2020 19:58:25 -0000 On Fri, Jun 26, 2020 at 03:34:09PM -0400, Marek Polacek via Gcc-patches wrote: > As discussed last month: > > it's time to change the C++ default to gnu++17. I've committed the patch after > testing x86_64-pc-linux-gnu and powerpc64le-unknown-linux-gnu. Brace yourselves! I've also updated wwwdocs to that effect: commit 1528c44593180742ab827f9ea66d31e75b803de0 Author: Marek Polacek Date: Fri Jun 26 15:56:12 2020 -0400 The default C++ dialect in GCC 11 is C++17. diff --git a/htdocs/gcc-11/changes.html b/htdocs/gcc-11/changes.html index dc22f216..cea01a9c 100644 --- a/htdocs/gcc-11/changes.html +++ b/htdocs/gcc-11/changes.html @@ -30,6 +30,9 @@ a work-in-progress.

Caveats

    +
  • The default mode for C++ is now -std=gnu++17 instead of + -std=gnu++14.
    • +
  • Naming and location of auxiliary and dump output files changed. If you compile multiple input files in a single command, if you enable Link Time Optimization, or if you use -dumpbase, @@ -72,6 +75,7 @@ a work-in-progress.

    C++

      +
    • The default mode has been changed to -std=gnu++17.
    • Several C++ Defect Reports have been resolved, e.g.:
      • DR 1512, Pointer comparison vs qualification conversions
        • diff --git a/htdocs/projects/cxx-status.html b/htdocs/projects/cxx-status.html index b5cdd1a9..ed1a3440 100644 --- a/htdocs/projects/cxx-status.html +++ b/htdocs/projects/cxx-status.html @@ -577,11 +577,10 @@ the library documentation.

        -

        C++17 features are available since GCC 5. To enable C++17 - support, add the command-line parameter -std=c++17 - to your g++ command line. Or, to enable GNU - extensions in addition to C++17 features, - add -std=gnu++17.

        +

        C++17 features are available since GCC 5. This mode is the default + in GCC 11; it can be explicitly selected with the -std=c++17 + command-line flag, or -std=gnu++17 to enable GNU extensions + as well.

        C++17 Language Features

        @@ -902,8 +901,8 @@

        GCC has full support for the previous revision of the C++ standard, which was published in 2014.

        -

        This mode is the default in GCC 6.1 and above; it can be explicitly - selected with the -std=c++14 command-line flag, +

        This mode is the default in GCC 6.1 up until GCC 10 (including); it can + be explicitly selected with the -std=c++14 command-line flag, or -std=gnu++14 to enable GNU extensions as well.

        C++14 Language Features