From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Monjalon <thomas.monjalon-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
Subject: Re: [PATCH v2] DPDK does not build on gcc 4.4,
	as it complains due to strict-aliasing rules in virtual_pmd and
	link_bonding_mode4 tests, with no errors in next gcc versions:
Date: Mon, 30 Mar 2015 22:47:33 +0200
Message-ID: <1539174.vstNdTQhGW@xps13>
References: <1427397455-30368-1-git-send-email-pablo.de.lara.guarch@intel.com>
 <1427713576-31094-1-git-send-email-pablo.de.lara.guarch@intel.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: quoted-printable
Cc: dev-VfR2kkLFssw@public.gmane.org
To: Pablo de Lara <pablo.de.lara.guarch-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Return-path: <dev-bounces-VfR2kkLFssw@public.gmane.org>
In-Reply-To: <1427713576-31094-1-git-send-email-pablo.de.lara.guarch-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
List-Id: patches and discussions about DPDK <dev.dpdk.org>
List-Unsubscribe: <http://dpdk.org/ml/options/dev>,
 <mailto:dev-request-VfR2kkLFssw@public.gmane.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev-VfR2kkLFssw@public.gmane.org>
List-Help: <mailto:dev-request-VfR2kkLFssw@public.gmane.org?subject=help>
List-Subscribe: <http://dpdk.org/ml/listinfo/dev>,
 <mailto:dev-request-VfR2kkLFssw@public.gmane.org?subject=subscribe>
Errors-To: dev-bounces-VfR2kkLFssw@public.gmane.org
Sender: "dev" <dev-bounces-VfR2kkLFssw@public.gmane.org>

2015-03-30 12:06, Pablo de Lara:
> CC virtual_pmd.o
> CC test_link_bonding_mode4.o
> cc1: warnings being treated as errors
> /root/dpdk/app/test/test_link_bonding_mode4.c: In function =E2=80=98t=
est_mode4_expired=E2=80=99:
> /root/dpdk/x86_64-native-linuxapp-gcc/include/rte_ring.h:645: error: =
dereferencing pointer =E2=80=98pkt.409=E2=80=99 does break strict-alias=
ing rules
> /root/dpdk/x86_64-native-linuxapp-gcc/include/rte_ring.h:729: error: =
dereferencing pointer =E2=80=98pkt.409=E2=80=99 does break strict-alias=
ing rules
> ...
> cc1: warnings being treated as errors
> /root/dpdk/app/test/virtual_pmd.c: In function =E2=80=98virtual_ethde=
v_stats_reset=E2=80=99:
> /root/dpdk/x86_64-native-linuxapp-gcc/include/rte_ring.h:645: error: =
dereferencing pointer =E2=80=98pkt.338=E2=80=99 does break strict-alias=
ing rules
> /root/dpdk/x86_64-native-linuxapp-gcc/include/rte_ring.h:729: error: =
dereferencing pointer =E2=80=98pkt.338=E2=80=99 does break strict-alias=
ing rules
>=20
> This patch fixes the compilation by disabling
> these warnings.
>=20
> Changes in v2:
>=20
> Added missing gcc version check (checking if gcc 4.4 is present)
>=20
> Signed-off-by: Pablo de Lara <pablo.de.lara.guarch-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

Pawel's proposal was chosen because it doesn't require handling special=

compiler version.