From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 7B71AA051C; Tue, 11 Feb 2020 12:43:12 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 6063A1C06D; Tue, 11 Feb 2020 12:43:12 +0100 (CET) Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by dpdk.org (Postfix) with ESMTP id 44B4A1C012 for ; Tue, 11 Feb 2020 12:43:11 +0100 (CET) X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 11 Feb 2020 03:43:10 -0800 X-IronPort-AV: E=Sophos;i="5.70,428,1574150400"; d="scan'208";a="221906962" Received: from bricha3-mobl.ger.corp.intel.com ([10.237.221.79]) by orsmga007-auth.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 11 Feb 2020 03:43:08 -0800 Date: Tue, 11 Feb 2020 11:43:05 +0000 From: Bruce Richardson To: Thomas Monjalon Cc: dev@dpdk.org, Matan Azrad , Shahaf Shuler , Viacheslav Ovsiienko Message-ID: <20200211114305.GE823@bricha3-MOBL.ger.corp.intel.com> References: <20200127154402.4008069-1-thomas@monjalon.net> <20200211011942.1569573-4-thomas@monjalon.net> <20200211112951.GA823@bricha3-MOBL.ger.corp.intel.com> <10758925.RiKt1P0BV1@xps> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <10758925.RiKt1P0BV1@xps> User-Agent: Mutt/1.12.1 (2019-06-15) Subject: Re: [dpdk-dev] [PATCH v3 3/5] net/mlx: workaround static linkage with meson 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" On Tue, Feb 11, 2020 at 12:36:06PM +0100, Thomas Monjalon wrote: > 11/02/2020 12:29, Bruce Richardson: > > On Tue, Feb 11, 2020 at 02:19:40AM +0100, Thomas Monjalon wrote: > > > If ibverbs_link is static and the application choose to link DPDK > > > as static libraries, both PMD and ibverbs libraries must be linked > > > as static libraries. And the dependencies of ibverbs (netlink) must > > > still be linked as shared libraries. > > > > > > Unfortunately, meson forget about the static requirement for ibverbs > > > when generating the .pc file. > > > As a result, libibverbs, libmlx4, libmlx5 are listed in Requires.private > > > section (allowing to be linked as shared libraries) and libnl is missing. > > > > > > A fix is in progress for meson, but anyway we will have to live without > > > such a fix until a better version of meson is widely available: > > > https://github.com/mesonbuild/meson/pull/6393 > > > > > > In order to avoid meson suggesting shared libraries in the section > > > Requires.private of the .pc file, the dependency object is recreated > > > with declare_dependency(): > > > - cflags are extracted the libibverbs.pc > > > - ldflags, from libibverbs.pc, are processed to force > > > static flavor of ibverbs libraries, thanks to this syntax: > > > -l:libfoo.a > > > > > > Fixes: 83fff714bd27 ("net/mlx: add static ibverbs linkage with meson") > > > > > > Signed-off-by: Thomas Monjalon > > > Signed-off-by: Bruce Richardson > > > --- > > > +if build and static_ibverbs > > > + # Build without adding shared libs to Requires.private > > > + ibv_cflags = run_command(pkgconf, '--cflags', 'libibverbs').stdout() > > > + ext_deps += declare_dependency(compile_args: ibv_cflags.split()) > > > + # Add static deps ldflags to internal apps and Libs.private > > > + ibv_ldflags = run_command(ldflags_ibverbs_static, check:true).stdout() > > > + ext_deps += declare_dependency(link_args:ibv_ldflags.split()) > > > +endif > > > > Is there a reason for specfiying two dependencies, rather than putting both > > cflags and ldflags into the one dependency object? > > Yes, the reason is the patch for dlopen which needs cflags only. > Ah, ok, thanks for clarifying.