From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 63532C43334 for ; Wed, 5 Sep 2018 17:34:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 28BB72075E for ; Wed, 5 Sep 2018 17:34:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 28BB72075E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=opteya.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727711AbeIEWF7 (ORCPT ); Wed, 5 Sep 2018 18:05:59 -0400 Received: from ou.quest-ce.net ([195.154.187.82]:42229 "EHLO ou.quest-ce.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726497AbeIEWF6 (ORCPT ); Wed, 5 Sep 2018 18:05:58 -0400 X-Greylist: delayed 1320 seconds by postgrey-1.27 at vger.kernel.org; Wed, 05 Sep 2018 18:05:56 EDT Received: from [37.169.125.128] (helo=test.quest-ce.net) by ou.quest-ce.net with esmtpsa (TLS1.1:RSA_AES_256_CBC_SHA1:256) (Exim 4.80) (envelope-from ) id 1fxbgY-000DnC-H1; Wed, 05 Sep 2018 19:33:46 +0200 Message-ID: From: Yann Droneaud To: Greg KH , David Howells Cc: linux-api@vger.kernel.org, linux-kbuild@vger.kernel.org, Michal Marek , dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, keyrings@vger.kernel.org, David Airlie , linux-nilfs@vger.kernel.org, linux-nvdimm@lists.01.org, "Michael S. Tsirkin" , codalist@coda.cs.cmu.edu, coda@cs.cmu.edu, coreteam@netfilter.org, Rob Clark , linux-arm-msm@vger.kernel.org, Kent Overstreet , Dan Williams , Takashi Iwai , linux-bcache@vger.kernel.org, Coly Li , Jaroslav Kysela , Jan Harkes , Masahiro Yamada , Ryusuke Konishi , Jason Wang , Mat Martineau , netfilter-devel@vger.kernel.org, linux-fsdevel@vger.kernel.org, moderated for non-subscribers , freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org Date: Wed, 05 Sep 2018 19:33:38 +0200 In-Reply-To: <20180905165552.GB25206@kroah.com> References: <153616286704.23468.584491117180383924.stgit@warthog.procyon.org.uk> <20180905165552.GB25206@kroah.com> Organization: OPTEYA Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.28.5 (3.28.5-1.fc28) Mime-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 37.169.125.128 X-SA-Exim-Mail-From: ydroneaud@opteya.com Subject: Re: [RFC] UAPI: Check headers by compiling all together as C++ X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: Yes (on ou.quest-ce.net) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Le mercredi 05 septembre 2018 à 18:55 +0200, Greg KH a écrit : > On Wed, Sep 05, 2018 at 04:54:27PM +0100, David Howells wrote: > > > > Here's a set of patches that inserts a step into the build process to make > > sure that the UAPI headers can all be built together with C++ (if the > > compiler being used supports C++). All but the final patch perform fixups, > > including: > > Wait, why do we care? What has recently changed to start to directly > import kernel uapi files into C++ code? > > And if userspace wants to do this, can't they do the C namespace trick > themselves when they do the import? That must be how they are doing it > today, right? > They can't. Adding extern "C" { } doesn't magically make "class" a non keyword. Even if it was the case, writing C++ code using whatever->class would probably broke because class is a keyword in C++. -- Yann Droneaud OPTEYA