From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from youngberry.canonical.com (youngberry.canonical.com [91.189.89.112]) by dpdk.org (Postfix) with ESMTP id 26FE21B113 for ; Wed, 14 Nov 2018 14:18:40 +0100 (CET) Received: from 2.general.paelzer.uk.vpn ([10.172.196.173] helo=Keschdeichel.fritz.box) by youngberry.canonical.com with esmtpsa (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.76) (envelope-from ) id 1gMv43-0001vq-Qf; Wed, 14 Nov 2018 13:18:39 +0000 From: Christian Ehrhardt To: Luca Boccassi , dev , Bruce Richardson Cc: Christian Ehrhardt Date: Wed, 14 Nov 2018 14:18:38 +0100 Message-Id: <20181114131838.17989-1-christian.ehrhardt@canonical.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: Subject: [dpdk-dev] [PATCH] build: establish an invariant machine type 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: , X-List-Received-Date: Wed, 14 Nov 2018 13:18:40 -0000 Add the machine definition 'default' which is special compared to 'native' (most optimized for current system) or any explicit type (external entity has to decide on the type). It defaults to the per arch agreed common minimal baseline needed for DPDK to reasonable work. That might not be the most optimized, but the most portable version while still being able to support the CPU features required for DPDK. Going forward this can be bumped up by the DPDK project, but it can never be an invariant like 'native'. Distributions and other needing portable code are expected to define the machine as 'baseline'. Changes in v2: - fixed the non 64 bit arm default type - changed baseline to default to match the old build system Signed-off-by: Christian Ehrhardt --- config/meson.build | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/config/meson.build b/config/meson.build index 1af305f46..db32499b3 100644 --- a/config/meson.build +++ b/config/meson.build @@ -7,6 +7,27 @@ if meson.is_cross_build() else machine = get_option('machine') endif + +# machine type 'default' is special, it defaults to the per arch agreed common +# minimal baseline needed for DPDK. +# That might not be the most optimized, but the most portable version while +# still being able to support the CPU features required for DPDK. +# This can be bumped up by the DPDK project, but it can never be an +# invariant like 'native' +if machine == 'default' + if host_machine.cpu_family().startswith('x86') + # matches the old pre-meson build systems default + machine = 'corei7' + elif host_machine.cpu_family().startswith('arm') + machine = 'armv7-a' + elif host_machine.cpu_family().startswith('aarch') + # arm64 manages defaults in config/arm/meson.build + machine = 'default' + elif host_machine.cpu_family().startswith('ppc') + machine = 'power8' + endif +endif + dpdk_conf.set('RTE_MACHINE', machine) machine_args = [] -- 2.17.1