From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by dpdk.org (Postfix) with ESMTP id 39577181 for ; Fri, 13 Mar 2015 12:49:02 +0100 (CET) Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga103.jf.intel.com with ESMTP; 13 Mar 2015 04:46:02 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.11,394,1422950400"; d="scan'208";a="540436034" Received: from smonroyx-mobl.ger.corp.intel.com (HELO [10.237.221.3]) ([10.237.221.3]) by orsmga003.jf.intel.com with ESMTP; 13 Mar 2015 04:48:13 -0700 Message-ID: <5502CEAB.8060801@intel.com> Date: Fri, 13 Mar 2015 11:48:59 +0000 From: "Gonzalez Monroy, Sergio" User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 MIME-Version: 1.0 To: "Kavanagh, Mark B" References: <1422544811-26385-1-git-send-email-sergio.gonzalez.monroy@intel.com> <1426177681-16931-1-git-send-email-sergio.gonzalez.monroy@intel.com> <1426177681-16931-2-git-send-email-sergio.gonzalez.monroy@intel.com> <5502C7D9.2060503@intel.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: "dev@dpdk.org" Subject: Re: [dpdk-dev] [PATCH v2 1/4] mk: Remove combined library and related options X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Mar 2015 11:49:02 -0000 On 13/03/2015 11:34, Kavanagh, Mark B wrote: >> On 13/03/2015 10:49, Kavanagh, Mark B wrote: >>>> --- >>>> config/common_bsdapp | 6 -- >>>> config/common_linuxapp | 6 -- >>>> config/defconfig_ppc_64-power8-linuxapp-gcc | 2 - >>>> lib/Makefile | 1 - >>>> mk/rte.app.mk | 12 ---- >>>> mk/rte.lib.mk | 35 ---------- >>>> mk/rte.sdkbuild.mk | 3 - >>>> mk/rte.sharelib.mk | 101 ---------------------------- >>>> mk/rte.vars.mk | 9 --- >>>> 9 files changed, 175 deletions(-) >>>> delete mode 100644 mk/rte.sharelib.mk >>>> >>>> diff --git a/config/common_bsdapp b/config/common_bsdapp >>>> index 8ff4dc2..7ee5ecf 100644 >>>> --- a/config/common_bsdapp >>>> +++ b/config/common_bsdapp >>>> @@ -79,12 +79,6 @@ CONFIG_RTE_FORCE_INTRINSICS=n >>>> CONFIG_RTE_BUILD_SHARED_LIB=n >>>> >>>> # >>>> -# Combine to one single library >>>> -# >>>> -CONFIG_RTE_BUILD_COMBINE_LIBS=n >>>> -CONFIG_RTE_LIBNAME=intel_dpdk >>> Hi Sergio, >>> >>> Removing these options breaks compatibility with OVS. While it may be feasible to link >> to individual static libraries, in our experience, a single combined library provides a >> much more convenient way of linking. >>> Thanks, >>> Mark >>> >>>> - > > (snip) > > >>>> -endif >>>> - >>>> -RTE_LIBNAME := $(CONFIG_RTE_LIBNAME:"%"=%) >>>> -ifeq ($(RTE_LIBNAME),) >>>> -RTE_LIBNAME := intel_dpdk >>>> endif >>>> >>>> # RTE_TARGET is deducted from config when we are building the SDK. >>>> -- >>>> 1.9.3 >> Hi Mark, >> >> How does this patch break compatibility with OVS? >> >> Thanks, >> Sergio > Hey Sergio, > > We use the CONFIG_RTE_BUILD_COMBINE_LIBS and CONFIG_RTE_LINBNAME flags to build a single static DPDK library, named 'libintel_dpdk.a', which OVS links against. Removing the combined library option breaks compatibility with any application that links against the combined DPDK library. > > Is there a strong technical motivation for removing these options? > > Thanks, > Mark From a shared library point of view, it just does not make sense to have applications linked against a 'combined' library that may have different features built in it. Removing these options, aside from the obvious 'less build config option', it simplifies maintenance of makefiles as we currently have a separated makefile with specific rules just for combined library. It is pretty straight forward to build a single combined archive out of multiple archives, would it be acceptable to have a script to do this? Thanks, Sergio