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[204.195.22.127]) by smtp.gmail.com with ESMTPSA id b13sm52053163pfd.12.2019.04.16.14.19.24 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 16 Apr 2019 14:19:24 -0700 (PDT) Date: Tue, 16 Apr 2019 14:19:19 -0700 From: Stephen Hemminger To: "Ananyev, Konstantin" Cc: Andrew Rybchenko , "Yigit, Ferruh" , David Christensen , "thomas@monjalon.net" , "dev@dpdk.org" , "radhika.chirra@ibm.com" , "stable@dpdk.org" Message-ID: <20190416141919.523b4c8b@xps13.lan> In-Reply-To: <2601191342CEEE43887BDE71AB9772580148A98822@irsmsx105.ger.corp.intel.com> References: <1554927376-93022-1-git-send-email-drc@linux.vnet.ibm.com> <1554932214-96522-1-git-send-email-drc@linux.vnet.ibm.com> <51c69c8b-9b23-4c48-bf70-2f4881ce873b@intel.com> <2601191342CEEE43887BDE71AB9772580148A98822@irsmsx105.ger.corp.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [dpdk-dev] [dpdk-stable] [PATCH v2] ethdev: missing typecast causes C++ build error X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Message-ID: <20190416211919.zGONMV7yduNH2iLjzc-ZbZNo-W4IBuAP3s6-n3Tiw58@z> On Tue, 16 Apr 2019 16:46:14 +0000 "Ananyev, Konstantin" wrote: > > -----Original Message----- > > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Andrew Rybchenko > > Sent: Tuesday, April 16, 2019 5:40 PM > > To: Yigit, Ferruh ; David Christensen ; thomas@monjalon.net > > Cc: dev@dpdk.org; radhika.chirra@ibm.com; stable@dpdk.org > > Subject: Re: [dpdk-dev] [dpdk-stable] [PATCH v2] ethdev: missing typeca= st causes C++ build error > >=20 > > On 4/16/19 7:31 PM, Ferruh Yigit wrote: =20 > > > On 4/10/2019 10:36 PM, David Christensen wrote: =20 > > >> The function eth_dev_pci_specific_init is missing a typecast to > > >> (struct rte_pci_device *) for the input argument bus_device. > > >> This causes build issues in the GNU C++ compiler. > > >> > > >> [CXX] g++ -o utils/pcap_handle.o -c utils/pcap_handle.cc -g3= =C2=B7 > > >> -ggdb3 -mcpu=3Dnative -mtune=3Dnative -isystem=C2=B7 > > >> /home/rchirra/gen/io/ppc64include -std=3Dgnu++11 -flax-vector-conver= sions=C2=B7 > > >> -Werror -isystem /home/rchirra/gen/io > > >> > > >> In file included from drivers/pmd.cc:7:0: > > >> /home/rchirra/gen/io/deps/dpdk/build/include/rte_ethdev_pci.h: > > >> In function =E2=80=98int eth_dev_pci_specific_init(rte_eth_dev*, voi= d*)=E2=80=99: > > >> /home/rchirra/gen/io/deps/dpdk/build/include/rte_ethdev_pci.h:75:35:= =C2=B7 > > >> error: invalid conversion from =E2=80=98void*=E2=80=99 to =E2=80=98r= te_pci_device*=E2=80=99 > > >> [-fpermissive] > > >> struct rte_pci_device *pci_dev =3D bus_device; > > >> ^~~~~~~~~~ > > >> make[1]: *** [drivers/pmd.o] Error 1 > > >> > > >> $ g++ --version > > >> g++ (Ubuntu 7.3.0-27ubuntu1~18.04) 7.3.0 =20 > > > This problem is while building a driver with c++ compiler, but since = the > > > solution is a simple casting, which doesn't have any side affect, I a= m for > > > getting the patch, any objection? =20 > >=20 > > It should be a decision that we support PMDs in C++ (if I understand > > the usage correctly) and it will require all headers to be compatible a= nd > > ideally it should be checked by build automation (otherwise we will bre= ak > > and fix it pretty often). =20 >=20 > Or as alternative, we probably can claim that PMDs in C++ are not support= ed, > and if people like to do that - they have to deal with it on their own > (create a C wrapper file, or so). > Konstantin >=20 +1 no drivers or other parts of EAL in C++