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From: Bruce Richardson <bruce.richardson@intel.com>
To: Luca Boccassi <bluca@debian.org>
Cc: dev@dpdk.org, stable@dpdk.org
Subject: Re: [dpdk-dev] [dpdk-stable] [PATCH 2/2] build: use dependency() instead of find_library()
Date: Fri, 11 Jan 2019 14:24:40 +0000
Message-ID: <20190111142440.GA15912@bricha3-MOBL.ger.corp.intel.com> (raw)
In-Reply-To: <1547210363.4501.10.camel@debian.org>

On Fri, Jan 11, 2019 at 12:39:23PM +0000, Luca Boccassi wrote:
> On Fri, 2019-01-11 at 11:52 +0000, Bruce Richardson wrote:
> > On Fri, Jan 11, 2019 at 11:10:28AM +0000, Luca Boccassi wrote:
> > > On Mon, 2019-01-07 at 16:55 +0000, Bruce Richardson wrote:
> > > > On Mon, Jan 07, 2019 at 04:39:34PM +0000, Luca Boccassi wrote:
> > > > > On Mon, 2019-01-07 at 14:28 +0000, Bruce Richardson wrote:
> > > > > > On Thu, Jan 03, 2019 at 06:57:25PM +0100, Luca Boccassi
> > > > > > wrote:
> > > > > > > For libbsd, which is checked in a top level file and used
> > > > > > > to be
> > > > > > > added
> > > > > > > to the global linker flags array, add it to the ext_deps
> > > > > > > array
> > > > > > > of
> > > > > > > all top level meson files (app, test, lib, examples,
> > > > > > > drivers).
> > > > > > > The
> > > > > > > most correct change would be to let each individual
> > > > > > > library/driver/app
> > > > > > > depend on it individually if they use symbols from it, but
> > > > > > > it
> > > > > > > would
> > > > > > > diverge from the legacy Makefile's behaviour and make life
> > > > > > > a
> > > > > > > bit
> > > > > > > more
> > > > > > > difficult for contributors.
> > > > > > 
> > > > > > It shouldn't be necessary to add libbsd as a dependency for
> > > > > > everything. I
> > > > > > think just adding it as a dependency of EAL should work
> > > > > > fine. 
> > > > > 
> > > > > Won't that mean that the shared libraries other than EAL will
> > > > > have
> > > > > undefined references?
> > > > 
> > > > Should not happen. AFAIK when you link against a library in meson
> > > > it
> > > > will
> > > > also link against any of that libraries dependencies too. For
> > > > shared
> > > > libraries meson always disallowed undefined references in the
> > > > linker
> > > > commandline. [To have libs with undefined refs, e.g. plugins, you
> > > > need to
> > > > use "shared_module" rather than "shared_library" command].
> > > 
> > > Looked at this again, and rte_cmdline is using strlcpy as well, and
> > > it's built before rte_eal, so it fails:
> > > 
> > > lib/76b5a35@@rte_cmdline@sta/librte_cmdline_cmdline_parse.c.o: In
> > > function `cmdline_complete':
> > > cmdline_parse.c:(.text+0x861): undefined reference to `strlcpy'
> > > 
> > > Adding it to ext_deps in both rte_cmdline and rte_eal works. Is
> > > that an acceptable compromise?
> > > 
> > 
> > Sure. If eal has a dependency on cmdline, you probably don't need to
> > add it
> > as an external dependency to EAL too, but it doesn't really hurt to
> > do so.
> > 
> > /Bruce
> 
> eal does not depend on cmdline, so added in both in v2. I also split
> the libbsd change and meson bump to 0.47.1 in a separate commit in the
> series.
> 
> -- 
If there is no dependency, why is it being built first?

  reply	other threads:[~2019-01-11 14:24 UTC|newest]

Thread overview: 88+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-03 17:57 [dpdk-dev] [PATCH 1/2] build: use static deps of libs for pkg-config libs.private Luca Boccassi
2019-01-03 17:57 ` [dpdk-dev] [PATCH 2/2] build: use dependency() instead of find_library() Luca Boccassi
2019-01-07 14:28   ` Bruce Richardson
2019-01-07 16:39     ` [dpdk-dev] [dpdk-stable] " Luca Boccassi
2019-01-07 16:55       ` Bruce Richardson
2019-01-07 17:03         ` [dpdk-dev] [dpdk-techboard] " Thomas Monjalon
2019-01-07 17:45           ` [dpdk-dev] [dpdk-stable] [dpdk-techboard] " Thomas Monjalon
2019-01-07 21:09             ` Luca Boccassi
2019-01-07 22:03               ` Luca Boccassi
2019-01-11 11:10         ` [dpdk-dev] [dpdk-stable] " Luca Boccassi
2019-01-11 11:52           ` Bruce Richardson
2019-01-11 12:39             ` Luca Boccassi
2019-01-11 14:24               ` Bruce Richardson [this message]
2019-01-11 14:56                 ` Luca Boccassi
2019-01-11 15:49                   ` Bruce Richardson
2019-01-11 16:27                     ` Luca Boccassi
2019-01-11 12:38 ` [dpdk-dev] [PATCH v2 1/3] build: use static deps of libs for pkg-config libs.private Luca Boccassi
2019-01-11 12:38   ` [dpdk-dev] [PATCH v2 2/3] build: use dependency() instead of find_library() Luca Boccassi
2019-01-11 12:38   ` [dpdk-dev] [PATCH v2 3/3] build: bump minimum Meson to 0.47.1 and use dependency() for libbsd Luca Boccassi
2019-01-11 14:27     ` Bruce Richardson
2019-01-11 14:30       ` Bruce Richardson
2019-01-11 15:04         ` Luca Boccassi
2019-01-11 15:50           ` Bruce Richardson
2019-01-11 16:14             ` Luca Boccassi
2019-01-11 16:26 ` [dpdk-dev] [PATCH v3 1/4] build: bump minimum Meson version to 0.47.1 Luca Boccassi
2019-01-11 16:26   ` [dpdk-dev] [PATCH v3 2/4] build: use dependency() instead of find_library() Luca Boccassi
2019-01-11 17:21     ` Bruce Richardson
2019-01-11 18:16       ` Luca Boccassi
2019-01-11 21:49         ` Bruce Richardson
2019-01-11 16:26   ` [dpdk-dev] [PATCH v3 3/4] build: reorder libraries and build eal before cmdline Luca Boccassi
2019-01-11 17:22     ` Bruce Richardson
2019-01-11 16:26   ` [dpdk-dev] [PATCH v3 4/4] build: use dependency() for libbsd instead of manual append to ldflags Luca Boccassi
2019-01-11 17:24     ` Bruce Richardson
2019-01-11 17:17   ` [dpdk-dev] [PATCH v3 1/4] build: bump minimum Meson version to 0.47.1 Bruce Richardson
2019-01-11 18:22 ` [dpdk-dev] [PATCH v4 " Luca Boccassi
2019-01-11 18:22   ` [dpdk-dev] [PATCH v4 2/4] build: use dependency() instead of find_library() Luca Boccassi
2019-01-11 18:22   ` [dpdk-dev] [PATCH v4 3/4] build: reorder libraries and build eal before cmdline Luca Boccassi
2019-01-11 18:22   ` [dpdk-dev] [PATCH v4 4/4] build: use dependency() for libbsd instead of manual append to ldflags Luca Boccassi
2019-01-22 13:10 ` [dpdk-dev] [PATCH v5 1/4] build: bump minimum Meson version to 0.47.1 Luca Boccassi
2019-01-22 13:10   ` [dpdk-dev] [PATCH v5 2/4] build: use dependency() instead of find_library() Luca Boccassi
2019-01-22 13:46     ` Bruce Richardson
2019-01-22 14:09       ` Luca Boccassi
2019-01-22 14:24         ` Bruce Richardson
2019-01-22 14:25     ` Bruce Richardson
2019-01-22 13:10   ` [dpdk-dev] [PATCH v5 3/4] build: reorder libraries and build eal before cmdline Luca Boccassi
2019-01-22 13:10   ` [dpdk-dev] [PATCH v5 4/4] build: use dependency() for libbsd instead of manual append to ldflags Luca Boccassi
2019-01-22 13:42   ` [dpdk-dev] [PATCH v5 1/4] build: bump minimum Meson version to 0.47.1 Bruce Richardson
2019-02-06 17:08 ` [dpdk-dev] [PATCH v6 1/5] " Luca Boccassi
2019-02-06 17:08   ` [dpdk-dev] [PATCH v6 2/5] build: use dependency() instead of find_library() Luca Boccassi
2019-02-12 11:15     ` Thomas Monjalon
2019-02-12 11:31       ` Bruce Richardson
2019-02-12 11:36         ` Thomas Monjalon
2019-02-12 11:43           ` Bruce Richardson
2019-02-12 14:47             ` Thomas Monjalon
2019-02-12 15:03               ` Bruce Richardson
2019-02-12 16:21                 ` Thomas Monjalon
2019-02-13 10:49                   ` Luca Boccassi
2019-02-13 11:10                     ` Thomas Monjalon
2019-02-13 13:45                       ` Luca Boccassi
2019-02-13 11:48                     ` Luca Boccassi
2019-02-06 17:08   ` [dpdk-dev] [PATCH v6 3/5] build: reorder libraries and build eal before cmdline Luca Boccassi
2019-02-06 17:08   ` [dpdk-dev] [PATCH v6 4/5] build: use dependency() for libbsd instead of manual append to ldflags Luca Boccassi
2019-02-06 17:08   ` [dpdk-dev] [PATCH v6 5/5] build: use integers for numerical options Luca Boccassi
2019-02-08 14:44     ` Bruce Richardson
2019-02-13 11:54 ` [dpdk-dev] [PATCH v7 1/5] build: bump minimum Meson version to 0.47.1 Luca Boccassi
2019-02-13 11:54   ` [dpdk-dev] [PATCH v7 2/5] build: use dependency() instead of find_library() Luca Boccassi
2019-02-13 15:35     ` Bruce Richardson
2019-02-13 11:54   ` [dpdk-dev] [PATCH v7 3/5] build: reorder libraries and build eal before cmdline Luca Boccassi
2019-02-13 11:54   ` [dpdk-dev] [PATCH v7 4/5] build: use dependency() for libbsd instead of manual append to ldflags Luca Boccassi
2019-02-13 11:54   ` [dpdk-dev] [PATCH v7 5/5] build: use integers for numerical options Luca Boccassi
2019-02-26 17:46 ` [dpdk-dev] [PATCH v8 1/6] build: bump minimum Meson version to 0.47.1 luca.boccassi
2019-02-26 17:46   ` [dpdk-dev] [PATCH v8 2/6] build: use dependency() instead of find_library() luca.boccassi
2019-02-26 17:46   ` [dpdk-dev] [PATCH v8 3/6] build: reorder libraries and build eal before cmdline luca.boccassi
2019-02-26 17:46   ` [dpdk-dev] [PATCH v8 4/6] build: use dependency() for libbsd instead of manual append to ldflags luca.boccassi
2019-02-26 17:46   ` [dpdk-dev] [PATCH v8 5/6] build: use integers for numerical options luca.boccassi
2019-02-26 17:46   ` [dpdk-dev] [PATCH v8 6/6] build: use dependency for pcap and fallback to find_library luca.boccassi
2019-02-26 17:49     ` Luca Boccassi
2019-02-27  8:33       ` Thomas Monjalon
2019-02-27  9:47         ` Bruce Richardson
2019-02-27 10:50           ` Luca Boccassi
2019-02-27 10:56             ` Thomas Monjalon
2019-02-27 12:03               ` Luca Boccassi
2019-02-27 13:53                 ` Bruce Richardson
2019-02-28 17:40                   ` Bruce Richardson
2019-03-01 13:13                     ` Thomas Monjalon
2019-03-01 15:13                       ` Luca Boccassi
2019-03-01 13:22     ` Thomas Monjalon
2019-02-27 11:29   ` [dpdk-dev] [PATCH v8 1/6] build: bump minimum Meson version to 0.47.1 Thomas Monjalon

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