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Mon, 14 Feb 2022 06:19:25 -0500 (EST) From: Thomas Monjalon <thomas@monjalon.net> To: Bruce Richardson <bruce.richardson@intel.com> Cc: dev@dpdk.org, Tyler Retzlaff <roretzla@linux.microsoft.com>, dev@dpdk.org, ocardona@microsoft.com, roretzla@microsoft.com, david.marchand@redhat.com, ferruh.yigit@intel.com Subject: Re: out of tree driver builds broken with C++ Date: Mon, 14 Feb 2022 12:19:24 +0100 Message-ID: <3617079.VQhiAETyHQ@thomas> In-Reply-To: <Ygoy4Fy4X84N1Iqs@bricha3-MOBL.ger.corp.intel.com> References: <20220214091350.GA2793@linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net> <3450334.eFTFzoEnKi@thomas> <Ygoy4Fy4X84N1Iqs@bricha3-MOBL.ger.corp.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions <dev.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/dev>, <mailto:dev-request@dpdk.org?subject=unsubscribe> List-Archive: <http://mails.dpdk.org/archives/dev/> List-Post: <mailto:dev@dpdk.org> List-Help: <mailto:dev-request@dpdk.org?subject=help> List-Subscribe: <https://mails.dpdk.org/listinfo/dev>, <mailto:dev-request@dpdk.org?subject=subscribe> Errors-To: dev-bounces@dpdk.org 14/02/2022 11:45, Bruce Richardson: > On Mon, Feb 14, 2022 at 10:22:08AM +0100, Thomas Monjalon wrote: > > 14/02/2022 10:13, Tyler Retzlaff: > > > while the driver api is "internal" we agreed some time ago that drivers > > > could be built external to the dpdk tree. by enabling the meson setup > > > option -Denable_driver_sdk=true. > > > > > > it was agreed that the driver api was internal and would attract no > > > binary compatibility support which was fine. this change has now > > > imposed a further restriction that out of tree drivers have to be > > > authored in C only as non-C++ compatible code will invariably leak into > > > the internal structures. > > > > > > you won't allow us to build C++ drivers in the dpdk tree and it seems > > > now you are preventing building of C++ drivers outside of the tree too. > > > > That's the problem of non-written assumptions, they are unknown or forgotten. > > Did we agree to support out-of-tree drivers in C++? > > > > We really need to make things clear and written in documentation. > > > > > could we please re-evaluate this. > > > > Yes we can re-evaluate. > > What is the list of impacted files? > > > Hacking meson files a bit, the list of SDK header files is reported as below. > > /Bruce > > Message: SDK headers: > Message: ethdev_driver.h > Message: ethdev_pci.h > Message: ethdev_vdev.h > Message: cryptodev_pmd.h > Message: eventdev_pmd.h > Message: eventdev_pmd_pci.h > Message: eventdev_pmd_vdev.h > Message: eventdev_trace.h > Message: event_timer_adapter_pmd.h > Message: rte_dmadev_pmd.h > Message: vdpa_driver.h I see no harm in supporting C++ include of these headers. Any objection? Could we have a test in chkincs for the SDK headers?