From: David Howells <dhowells@redhat.com> To: Greg KH <greg@kroah.com> Cc: dhowells@redhat.com, linux-api@vger.kernel.org, linux-kbuild@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, keyrings@vger.kernel.org, netfilter-devel@vger.kernel.org, linux-fsdevel@vger.kernel.org, alsa-devel@alsa-project.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: Re: [RFC] UAPI: Check headers by compiling all together as C++ Date: Wed, 05 Sep 2018 17:50:42 +0000 [thread overview] Message-ID: <22225.1536169842@warthog.procyon.org.uk> (raw) In-Reply-To: <20180905165552.GB25206@kroah.com> Greg KH <greg@kroah.com> 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? There's at least one outstanding bug due to a C++ identifier in the kernel UAPI headers. Are you saying you explicitly don't want people to be able to use the kernel UAPI headers in C++? > 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? No, because there's no such trick (except with the preprocessor). David
WARNING: multiple messages have this Message-ID (diff)
From: David Howells <dhowells@redhat.com> To: Greg KH <greg@kroah.com> Cc: dhowells@redhat.com, linux-api@vger.kernel.org, linux-kbuild@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, keyrings@vger.kernel.org, netfilter-devel@vger.kernel.org, linux-fsdevel@vger.kernel.org, alsa-devel@alsa-project.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: Re: [RFC] UAPI: Check headers by compiling all together as C++ Date: Wed, 05 Sep 2018 18:50:42 +0100 [thread overview] Message-ID: <22225.1536169842@warthog.procyon.org.uk> (raw) In-Reply-To: <20180905165552.GB25206@kroah.com> Greg KH <greg@kroah.com> 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? There's at least one outstanding bug due to a C++ identifier in the kernel UAPI headers. Are you saying you explicitly don't want people to be able to use the kernel UAPI headers in C++? > 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? No, because there's no such trick (except with the preprocessor). David
next prev parent reply other threads:[~2018-09-05 17:50 UTC|newest] Thread overview: 138+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-09-05 15:54 [RFC] UAPI: Check headers by compiling all together as C++ David Howells 2018-09-05 15:54 ` David Howells 2018-09-05 15:54 ` David Howells 2018-09-05 15:54 ` David Howells 2018-09-05 15:54 ` David Howells 2018-09-05 15:54 ` [PATCH 01/11] UAPI: drm: Fix use of C++ keywords as structural members David Howells 2018-09-05 15:54 ` David Howells 2018-09-05 15:54 ` [PATCH 02/11] UAPI: keys: " David Howells 2018-09-05 15:54 ` David Howells 2018-09-05 15:54 ` [PATCH 03/11] UAPI: virtio_net: " David Howells 2018-09-05 16:54 ` Greg KH 2018-09-05 16:54 ` Greg KH 2018-09-05 17:15 ` David Howells 2018-09-05 17:15 ` David Howells 2018-09-05 17:35 ` Michael S. Tsirkin 2018-09-05 17:35 ` Michael S. Tsirkin 2018-09-06 7:09 ` David Howells 2018-09-06 7:09 ` David Howells 2018-09-06 14:36 ` Michael S. Tsirkin 2018-09-06 14:36 ` Michael S. Tsirkin 2018-09-05 15:54 ` David Howells 2018-09-05 15:55 ` [PATCH 04/11] UAPI: bcache: Fix use of embedded flexible array David Howells 2018-10-02 14:52 ` Jan Engelhardt 2018-10-09 15:41 ` David Howells 2018-10-09 16:54 ` Jan Engelhardt 2018-09-05 15:55 ` [PATCH 05/11] UAPI: coda: Don't use internal kernel structs in UAPI David Howells 2018-09-05 16:54 ` Jan Harkes 2018-09-05 17:12 ` Yann Droneaud 2018-09-05 17:28 ` Jan Harkes 2018-09-05 17:28 ` Jan Harkes 2018-09-05 17:24 ` David Howells 2018-09-06 7:13 ` David Howells 2018-09-06 11:52 ` Yann Droneaud 2018-09-06 12:16 ` Jan Harkes 2018-09-06 12:16 ` Jan Harkes 2018-09-06 14:53 ` David Howells 2018-09-05 15:55 ` [PATCH 06/11] UAPI: netfilter: Fix symbol collision issues David Howells 2018-09-05 15:55 ` [PATCH 07/11] UAPI: nilfs2: Fix use of undefined byteswapping functions David Howells 2018-09-05 22:20 ` Al Viro 2018-09-05 15:55 ` [PATCH 08/11] UAPI: sound: Fix use of u32 and co. in UAPI headers David Howells 2018-09-05 15:55 ` David Howells 2018-09-06 5:59 ` Takashi Sakamoto 2018-09-06 5:59 ` Takashi Sakamoto 2018-09-06 8:17 ` David Howells 2018-09-05 15:55 ` [PATCH 09/11] UAPI: ndctl: Fix g++-unsupported initialisation in headers David Howells 2018-09-05 15:55 ` David Howells 2018-09-05 15:55 ` David Howells 2018-09-05 15:55 ` [PATCH 10/11] UAPI: ndctl: Remove use of PAGE_SIZE David Howells 2018-09-05 15:55 ` David Howells 2018-09-05 15:55 ` [PATCH 11/11] UAPI: Check headers build for C++ David Howells 2018-09-05 16:55 ` [RFC] UAPI: Check headers by compiling all together as C++ Greg KH 2018-09-05 16:55 ` Greg KH 2018-09-05 16:55 ` Greg KH 2018-09-05 16:55 ` Greg KH 2018-09-05 16:55 ` Greg KH 2018-09-05 16:55 ` Greg KH 2018-09-05 17:33 ` Yann Droneaud 2018-09-05 17:33 ` Yann Droneaud 2018-09-05 17:33 ` Yann Droneaud 2018-09-05 17:33 ` Yann Droneaud 2018-09-05 17:33 ` Yann Droneaud 2018-09-05 17:42 ` Michael S. Tsirkin 2018-09-05 17:42 ` Michael S. Tsirkin 2018-09-05 17:42 ` Michael S. Tsirkin 2018-09-05 17:42 ` Michael S. Tsirkin 2018-09-05 17:42 ` Michael S. Tsirkin 2018-09-05 17:42 ` Michael S. Tsirkin 2018-09-05 17:42 ` Michael S. Tsirkin 2018-09-06 7:12 ` Yann Droneaud 2018-09-06 7:12 ` Yann Droneaud 2018-09-06 7:12 ` Yann Droneaud 2018-09-06 7:12 ` Yann Droneaud 2018-09-06 7:12 ` Yann Droneaud 2018-09-05 19:22 ` Jan Engelhardt 2018-09-05 19:22 ` Jan Engelhardt 2018-09-05 19:22 ` Jan Engelhardt 2018-09-05 19:22 ` Jan Engelhardt 2018-09-05 19:22 ` Jan Engelhardt 2018-09-05 17:50 ` David Howells 2018-09-05 17:50 ` David Howells [this message] 2018-09-05 17:50 ` David Howells -- strict thread matches above, loose matches on Subject: below -- 2018-09-06 9:18 David Howells 2018-09-06 9:18 ` David Howells 2018-09-06 9:18 ` David Howells 2018-09-06 9:18 ` David Howells 2018-09-06 9:18 ` David Howells [not found] ` <153622549721.14298.8116794954073122489.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org> 2018-09-06 9:18 ` [PATCH 01/11] UAPI: drm: Fix use of C++ keywords as structural members [ver #2] David Howells 2018-09-06 9:18 ` David Howells 2018-09-06 9:18 ` [PATCH 02/11] UAPI: keys: " David Howells 2018-09-06 9:18 ` David Howells 2018-09-06 9:18 ` [PATCH 03/11] UAPI: virtio_net: " David Howells 2018-09-06 15:02 ` Michael S. Tsirkin 2018-09-06 15:02 ` Michael S. Tsirkin 2018-09-06 9:18 ` David Howells 2018-09-06 9:18 ` [PATCH 04/11] UAPI: bcache: Fix use of embedded flexible array " David Howells 2018-09-06 9:18 ` [PATCH 05/11] UAPI: coda: Move kernel internals out of public view " David Howells 2018-09-06 9:18 ` David Howells 2018-09-06 9:19 ` [PATCH 06/11] coda: Move internal defs out of include/linux/ " David Howells 2018-09-06 9:19 ` [PATCH 07/11] UAPI: netfilter: Fix symbol collision issues " David Howells 2018-09-10 17:32 ` kbuild test robot 2018-09-10 17:32 ` kbuild test robot 2018-09-10 17:32 ` kbuild test robot 2018-09-28 13:07 ` [netfilter-core] " Pablo Neira Ayuso 2018-10-09 15:35 ` David Howells 2018-09-06 9:19 ` [PATCH 08/11] UAPI: nilfs2: Fix use of undefined byteswapping functions " David Howells 2018-09-06 9:19 ` [PATCH 09/11] UAPI: ndctl: Fix g++-unsupported initialisation in headers " David Howells 2018-09-06 9:19 ` David Howells 2018-09-06 9:19 ` David Howells 2018-09-25 20:22 ` Dan Williams 2018-09-25 20:22 ` Dan Williams 2018-09-25 20:22 ` Dan Williams 2018-09-06 9:19 ` [PATCH 10/11] UAPI: ndctl: Remove use of PAGE_SIZE " David Howells 2018-09-06 9:19 ` David Howells 2018-09-06 9:19 ` David Howells 2018-09-25 20:17 ` Dan Williams 2018-09-25 20:17 ` Dan Williams 2018-09-25 20:17 ` Dan Williams 2018-10-09 15:36 ` David Howells 2018-10-09 15:36 ` David Howells 2018-09-06 9:19 ` [PATCH 11/11] UAPI: Check headers build for C++ " David Howells 2018-09-10 16:26 ` kbuild test robot 2018-09-10 16:26 ` kbuild test robot 2018-09-10 16:26 ` kbuild test robot 2018-09-10 17:02 ` kbuild test robot 2018-09-10 17:02 ` kbuild test robot 2018-09-10 17:02 ` kbuild test robot 2018-09-14 9:10 ` Arnd Bergmann 2018-09-06 9:18 [RFC] UAPI: Check headers by compiling all together as C++ David Howells 2018-09-05 18:59 Alexey Dobriyan 2018-09-05 19:26 ` Greg KH 2018-09-05 19:31 ` Alexey Dobriyan 2018-09-05 22:22 ` Al Viro 2018-09-13 22:01 ` Alexey Dobriyan 2018-09-13 22:15 ` Al Viro 2018-09-13 23:27 ` David Howells 2018-09-13 23:42 ` Al Viro 2018-09-05 19:53 ` David Howells 2018-09-05 15:54 David Howells
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