From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ou.quest-ce.net (unknown [IPv6:2001:bc8:3541:100::1]) (using TLSv1.2 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 062AD2111B786 for ; Wed, 5 Sep 2018 10:34:00 -0700 (PDT) Message-ID: From: Yann Droneaud 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> Mime-Version: 1.0 Subject: Re: [RFC] UAPI: Check headers by compiling all together as C++ List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" To: Greg KH , David Howells Cc: moderated for non-subscribers , "Michael S. Tsirkin" , David Airlie , Jason Wang , Mat Martineau , dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, Masahiro Yamada , keyrings@vger.kernel.org, Ryusuke Konishi , linux-nilfs@vger.kernel.org, linux-nvdimm@lists.01.org, codalist@coda.cs.cmu.edu, coda@cs.cmu.edu, coreteam@netfilter.org, Kent Overstreet , linux-kbuild@vger.kernel.org, linux-arm-msm@vger.kernel.org, Coly Li , linux-bcache@vger.kernel.org, Jaroslav Kysela , Jan Harkes , Michal Marek , linux-api@vger.kernel.org, Takashi Iwai , linux-kernel@vger.kernel.org, Rob Clark , netfilter-devel@vger.kernel.org, linux-fsdevel@vger.kernel.org, freedreno@lists.freedesktop.org List-ID: SGksCgpMZSBtZXJjcmVkaSAwNSBzZXB0ZW1icmUgMjAxOCDDoCAxODo1NSArMDIwMCwgR3JlZyBL SCBhIMOpY3JpdCA6Cj4gT24gV2VkLCBTZXAgMDUsIDIwMTggYXQgMDQ6NTQ6MjdQTSArMDEwMCwg RGF2aWQgSG93ZWxscyB3cm90ZToKPiA+IAo+ID4gSGVyZSdzIGEgc2V0IG9mIHBhdGNoZXMgdGhh dCBpbnNlcnRzIGEgc3RlcCBpbnRvIHRoZSBidWlsZCBwcm9jZXNzIHRvIG1ha2UKPiA+IHN1cmUg dGhhdCB0aGUgVUFQSSBoZWFkZXJzIGNhbiBhbGwgYmUgYnVpbHQgdG9nZXRoZXIgd2l0aCBDKysg KGlmIHRoZQo+ID4gY29tcGlsZXIgYmVpbmcgdXNlZCBzdXBwb3J0cyBDKyspLiAgQWxsIGJ1dCB0 aGUgZmluYWwgcGF0Y2ggcGVyZm9ybSBmaXh1cHMsCj4gPiBpbmNsdWRpbmc6Cj4gCj4gV2FpdCwg d2h5IGRvIHdlIGNhcmU/ICBXaGF0IGhhcyByZWNlbnRseSBjaGFuZ2VkIHRvIHN0YXJ0IHRvIGRp cmVjdGx5Cj4gaW1wb3J0IGtlcm5lbCB1YXBpIGZpbGVzIGludG8gQysrIGNvZGU/Cj4gCj4gQW5k IGlmIHVzZXJzcGFjZSB3YW50cyB0byBkbyB0aGlzLCBjYW4ndCB0aGV5IGRvIHRoZSBDIG5hbWVz cGFjZSB0cmljawo+IHRoZW1zZWx2ZXMgd2hlbiB0aGV5IGRvIHRoZSBpbXBvcnQ/ICBUaGF0IG11 c3QgYmUgaG93IHRoZXkgYXJlIGRvaW5nIGl0Cj4gdG9kYXksIHJpZ2h0Pwo+IAoKVGhleSBjYW4n dC4KCgpBZGRpbmcgZXh0ZXJuICJDIiB7IH0gZG9lc24ndCBtYWdpY2FsbHkgbWFrZSAiY2xhc3Mi IGEgbm9uIGtleXdvcmQuCkV2ZW4gaWYgaXQgd2FzIHRoZSBjYXNlLCB3cml0aW5nIEMrKyBjb2Rl IHVzaW5nIHdoYXRldmVyLT5jbGFzcyB3b3VsZApwcm9iYWJseSBicm9rZSBiZWNhdXNlIGNsYXNz IGlzIGEga2V5d29yZCBpbiBDKysuCgotLSAKWWFubiBEcm9uZWF1ZApPUFRFWUEKCgpfX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpMaW51eC1udmRpbW0gbWFp bGluZyBsaXN0CkxpbnV4LW52ZGltbUBsaXN0cy4wMS5vcmcKaHR0cHM6Ly9saXN0cy4wMS5vcmcv bWFpbG1hbi9saXN0aW5mby9saW51eC1udmRpbW0K From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yann Droneaud Subject: Re: [RFC] UAPI: Check headers by compiling all together as C++ Date: Wed, 05 Sep 2018 19:33:38 +0200 Message-ID: References: <153616286704.23468.584491117180383924.stgit@warthog.procyon.org.uk> <20180905165552.GB25206@kroah.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <20180905165552.GB25206-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-nvdimm-bounces-hn68Rpc1hR1g9hUCZPvPmw@public.gmane.org Sender: "Linux-nvdimm" To: Greg KH , David Howells Cc: moderated for non-subscribers , "Michael S. Tsirkin" , David Airlie , Jason Wang , Mat Martineau , dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, virtualization-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, Masahiro Yamada , keyrings-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Ryusuke Konishi , linux-nilfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-nvdimm-hn68Rpc1hR1g9hUCZPvPmw@public.gmane.org, codalist-/uMB558Y47wP4a1z8dhFYw@public.gmane.org, coda-ETDLCGt7PQU3uPMLIKxrzw@public.gmane.org, coreteam-Cap9r6Oaw4JrovVCs/uTlw@public.gmane.org, Kent Overstreet , linux-kbuild-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-msm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Coly Li , linux-bcache-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Jaroslav Kysela , Jan Harkes , Michal Marek , linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Takashi Iwai , linux-kernel@ List-Id: linux-arm-msm@vger.kernel.org SGksCgpMZSBtZXJjcmVkaSAwNSBzZXB0ZW1icmUgMjAxOCDDoCAxODo1NSArMDIwMCwgR3JlZyBL SCBhIMOpY3JpdCA6Cj4gT24gV2VkLCBTZXAgMDUsIDIwMTggYXQgMDQ6NTQ6MjdQTSArMDEwMCwg RGF2aWQgSG93ZWxscyB3cm90ZToKPiA+IAo+ID4gSGVyZSdzIGEgc2V0IG9mIHBhdGNoZXMgdGhh dCBpbnNlcnRzIGEgc3RlcCBpbnRvIHRoZSBidWlsZCBwcm9jZXNzIHRvIG1ha2UKPiA+IHN1cmUg dGhhdCB0aGUgVUFQSSBoZWFkZXJzIGNhbiBhbGwgYmUgYnVpbHQgdG9nZXRoZXIgd2l0aCBDKysg KGlmIHRoZQo+ID4gY29tcGlsZXIgYmVpbmcgdXNlZCBzdXBwb3J0cyBDKyspLiAgQWxsIGJ1dCB0 aGUgZmluYWwgcGF0Y2ggcGVyZm9ybSBmaXh1cHMsCj4gPiBpbmNsdWRpbmc6Cj4gCj4gV2FpdCwg d2h5IGRvIHdlIGNhcmU/ICBXaGF0IGhhcyByZWNlbnRseSBjaGFuZ2VkIHRvIHN0YXJ0IHRvIGRp cmVjdGx5Cj4gaW1wb3J0IGtlcm5lbCB1YXBpIGZpbGVzIGludG8gQysrIGNvZGU/Cj4gCj4gQW5k IGlmIHVzZXJzcGFjZSB3YW50cyB0byBkbyB0aGlzLCBjYW4ndCB0aGV5IGRvIHRoZSBDIG5hbWVz cGFjZSB0cmljawo+IHRoZW1zZWx2ZXMgd2hlbiB0aGV5IGRvIHRoZSBpbXBvcnQ/ICBUaGF0IG11 c3QgYmUgaG93IHRoZXkgYXJlIGRvaW5nIGl0Cj4gdG9kYXksIHJpZ2h0Pwo+IAoKVGhleSBjYW4n dC4KCgpBZGRpbmcgZXh0ZXJuICJDIiB7IH0gZG9lc24ndCBtYWdpY2FsbHkgbWFrZSAiY2xhc3Mi IGEgbm9uIGtleXdvcmQuCkV2ZW4gaWYgaXQgd2FzIHRoZSBjYXNlLCB3cml0aW5nIEMrKyBjb2Rl IHVzaW5nIHdoYXRldmVyLT5jbGFzcyB3b3VsZApwcm9iYWJseSBicm9rZSBiZWNhdXNlIGNsYXNz IGlzIGEga2V5d29yZCBpbiBDKysuCgotLSAKWWFubiBEcm9uZWF1ZApPUFRFWUEKCgpfX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpMaW51eC1udmRpbW0gbWFp bGluZyBsaXN0CkxpbnV4LW52ZGltbUBsaXN0cy4wMS5vcmcKaHR0cHM6Ly9saXN0cy4wMS5vcmcv bWFpbG1hbi9saXN0aW5mby9saW51eC1udmRpbW0K From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yann Droneaud Date: Wed, 05 Sep 2018 17:33:38 +0000 Subject: Re: [RFC] UAPI: Check headers by compiling all together as C++ Message-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit List-Id: References: <153616286704.23468.584491117180383924.stgit@warthog.procyon.org.uk> <20180905165552.GB25206@kroah.com> In-Reply-To: <20180905165552.GB25206-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org> To: Greg KH , David Howells Cc: moderated for non-subscribers , "Michael S. Tsirkin" , David Airlie , Jason Wang , Mat Martineau , dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, virtualization-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, Masahiro Yamada , keyrings-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Ryusuke Konishi , linux-nilfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-nvdimm-hn68Rpc1hR1g9hUCZPvPmw@public.gmane.org, codalist-/uMB558Y47wP4a1z8dhFYw@public.gmane.org, coda-ETDLCGt7PQU3uPMLIKxrzw@public.gmane.org, coreteam-Cap9r6Oaw4JrovVCs/uTlw@public.gmane.org, Kent Overstreet , linux-kbuild-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-msm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Coly Li , linux-bcache-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Jaroslav Kysela , Jan Harkes , Michal Marek , linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Takashi Iwai 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 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 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yann Droneaud Subject: Re: [RFC] UAPI: Check headers by compiling all together as C++ Date: Wed, 05 Sep 2018 19:33:38 +0200 Message-ID: References: <153616286704.23468.584491117180383924.stgit@warthog.procyon.org.uk> <20180905165552.GB25206@kroah.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <20180905165552.GB25206-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-nvdimm-bounces-hn68Rpc1hR1g9hUCZPvPmw@public.gmane.org Sender: "Linux-nvdimm" To: Greg KH , David Howells Cc: moderated for non-subscribers , "Michael S. Tsirkin" , David Airlie , Jason Wang , Mat Martineau , dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, virtualization-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, Masahiro Yamada , keyrings-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Ryusuke Konishi , linux-nilfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-nvdimm-hn68Rpc1hR1g9hUCZPvPmw@public.gmane.org, codalist-/uMB558Y47wP4a1z8dhFYw@public.gmane.org, coda-ETDLCGt7PQU3uPMLIKxrzw@public.gmane.org, coreteam-Cap9r6Oaw4JrovVCs/uTlw@public.gmane.org, Kent Overstreet , linux-kbuild-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-msm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Coly Li , linux-bcache-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Jaroslav Kysela , Jan Harkes , Michal Marek , linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Takashi Iwai , SGksCgpMZSBtZXJjcmVkaSAwNSBzZXB0ZW1icmUgMjAxOCDDoCAxODo1NSArMDIwMCwgR3JlZyBL SCBhIMOpY3JpdCA6Cj4gT24gV2VkLCBTZXAgMDUsIDIwMTggYXQgMDQ6NTQ6MjdQTSArMDEwMCwg RGF2aWQgSG93ZWxscyB3cm90ZToKPiA+IAo+ID4gSGVyZSdzIGEgc2V0IG9mIHBhdGNoZXMgdGhh dCBpbnNlcnRzIGEgc3RlcCBpbnRvIHRoZSBidWlsZCBwcm9jZXNzIHRvIG1ha2UKPiA+IHN1cmUg dGhhdCB0aGUgVUFQSSBoZWFkZXJzIGNhbiBhbGwgYmUgYnVpbHQgdG9nZXRoZXIgd2l0aCBDKysg KGlmIHRoZQo+ID4gY29tcGlsZXIgYmVpbmcgdXNlZCBzdXBwb3J0cyBDKyspLiAgQWxsIGJ1dCB0 aGUgZmluYWwgcGF0Y2ggcGVyZm9ybSBmaXh1cHMsCj4gPiBpbmNsdWRpbmc6Cj4gCj4gV2FpdCwg d2h5IGRvIHdlIGNhcmU/ICBXaGF0IGhhcyByZWNlbnRseSBjaGFuZ2VkIHRvIHN0YXJ0IHRvIGRp cmVjdGx5Cj4gaW1wb3J0IGtlcm5lbCB1YXBpIGZpbGVzIGludG8gQysrIGNvZGU/Cj4gCj4gQW5k IGlmIHVzZXJzcGFjZSB3YW50cyB0byBkbyB0aGlzLCBjYW4ndCB0aGV5IGRvIHRoZSBDIG5hbWVz cGFjZSB0cmljawo+IHRoZW1zZWx2ZXMgd2hlbiB0aGV5IGRvIHRoZSBpbXBvcnQ/ICBUaGF0IG11 c3QgYmUgaG93IHRoZXkgYXJlIGRvaW5nIGl0Cj4gdG9kYXksIHJpZ2h0Pwo+IAoKVGhleSBjYW4n dC4KCgpBZGRpbmcgZXh0ZXJuICJDIiB7IH0gZG9lc24ndCBtYWdpY2FsbHkgbWFrZSAiY2xhc3Mi IGEgbm9uIGtleXdvcmQuCkV2ZW4gaWYgaXQgd2FzIHRoZSBjYXNlLCB3cml0aW5nIEMrKyBjb2Rl IHVzaW5nIHdoYXRldmVyLT5jbGFzcyB3b3VsZApwcm9iYWJseSBicm9rZSBiZWNhdXNlIGNsYXNz IGlzIGEga2V5d29yZCBpbiBDKysuCgotLSAKWWFubiBEcm9uZWF1ZApPUFRFWUEKCgpfX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpMaW51eC1udmRpbW0gbWFp bGluZyBsaXN0CkxpbnV4LW52ZGltbUBsaXN0cy4wMS5vcmcKaHR0cHM6Ly9saXN0cy4wMS5vcmcv bWFpbG1hbi9saXN0aW5mby9saW51eC1udmRpbW0K