From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christian Ehrhardt Subject: [PATCH] mk: bump minimum march in default machine Date: Tue, 1 Dec 2015 15:26:54 +0100 Message-ID: <1448980014-31548-1-git-send-email-christian.ehrhardt@canonical.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable To: dev@dpdk.org Return-path: Received: from youngberry.canonical.com (youngberry.canonical.com [91.189.89.112]) by dpdk.org (Postfix) with ESMTP id 127DB8D89 for ; Tue, 1 Dec 2015 15:26:56 +0100 (CET) List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" While playing with building 2.2-rc2 I found that our usual way didn't wor= k anymore. We usually configured "make config T=3Dx86_64-native-linuxapp-gcc" but th= en set CONFIG_RTE_MACHINE=3D"default" to get something like the "lowest acce= ptable build" but with that wide CPU copatibility. I found that with DPDK 2.2 this fails with issues like: In file included from /usr/lib/gcc/x86_64-linux-gnu/5/include/immintrin.h= :37:0, from dpdk-2.2.0-rc2/lib/librte_sched/rte_sched.c:56: dpdk-2.2.0-rc2/lib/librte_sched/rte_sched.c: In function =E2=80=98grinder= _pipe_exists=E2=80=99: /usr/lib/gcc/x86_64-linux-gnu/5/include/smmintrin.h:67:1: error: inlining failed in call to always_inline =E2=80=98_mm_testz_si128=E2=80=99: target= specific option mismatch _mm_testz_si128 (__m128i __M, __m128i __V) ^ This is a hard need on newer SSE4.x features which are not given with march=3Dcore2. So if nehalem (the next march level which has SSE4.x) is the new minimum = let us set this in the default machine config. Signed-off-by: Christian Ehrhardt --- [diffstat] rte.vars.mk | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) [diff] diff --git a/mk/machine/default/rte.vars.mk b/mk/machine/default/rte.vars= .mk index 53c6af6..170d880 100644 --- a/mk/machine/default/rte.vars.mk +++ b/mk/machine/default/rte.vars.mk @@ -55,4 +55,4 @@ # CPU_LDFLAGS =3D # CPU_ASFLAGS =3D =20 -MACHINE_CFLAGS +=3D -march=3Dcore2 +MACHINE_CFLAGS +=3D -march=3Dnehalem