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From: Bruce Richardson <bruce.richardson@intel.com>
To: Thomas Monjalon <thomas@monjalon.net>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH v2 0/4] add static ibverbs in meson
Date: Tue, 4 Feb 2020 11:48:38 +0000
Message-ID: <20200204114838.GC637@bricha3-MOBL.ger.corp.intel.com> (raw)
In-Reply-To: <20200127154402.4008069-1-thomas@monjalon.net>

On Mon, Jan 27, 2020 at 04:43:58PM +0100, Thomas Monjalon wrote:
> This is the follow-up of the feature I added one year ago:
> static linkage of libibverbs in mlx PMDs.
> The first implementation was focused on "make".
> This second round does the same with "meson".
> 
> 
> changes in v2:
> - split mlx patch for normal addition and workarounds
> - fix ldflags for ibverbs installed in a standard directory
> - fix libs order leading to undefined references
> - add doc for hidden_deps
> - improve explanations in commit logs
> 
> 
> Thomas Monjalon (4):
>   net/mlx: add static ibverbs linkage with meson
>   buildtools: get static mlx dependencies for meson
>   build: allow hiding dependencies from pkg-config
>   net/mlx: workaround static linkage with meson
> 
> 
Hi Thomas,

as we discussed offline, I really don't like the necessity of the
hidden_deps part of this, so I've tried coming up with some other
solutions. For example, in my testing I get the same result with the
following diff instead of the second two patches (just showing for mlx5 -
changes for mlx4 are identical):

--- a/drivers/net/mlx5/meson.build
+++ b/drivers/net/mlx5/meson.build
@@ -31,10 +31,7 @@ foreach libname:libnames
        endif
        if lib.found()
                libs += lib
-               if static_ibverbs
-                       # Build without adding shared libs to Requires.private
-                       hidden_deps += lib.partial_dependency(compile_args:true)
-               else
+               if not static_ibverbs
                        ext_deps += lib
                endif
        else
@@ -44,8 +41,10 @@ foreach libname:libnames
 endforeach
 if build and static_ibverbs
        # Add static deps ldflags to internal apps and Libs.private
-       ldflags = run_command(ldflags_ibverbs_static, check:true).stdout()
-       ext_deps += declare_dependency(link_args:ldflags.split())
+       ibv_ldflags = run_command(ldflags_ibverbs_static, check:true).stdout()
+       ibv_cflags = run_command(find_program('pkg-config'), '--cflags', 'libibverbs').stdout()
+       ext_deps += declare_dependency(compile_args: ibv_cflags.split(),
+                               link_args:ibv_ldflags.split())
 endif
 
 if build


By doing things this way - assuming it works in your tests too - we avoid
any need to change anything in the common drivers code.

How I tested this was by:
* doing a local rdma-core build as described in the docs and exporting
  PKG_CONFIG_PATH to point to the .pc file
* doing builds with all 4 of your patches applied (one static linking of
  apps, one shared, just in case)
* doing builds with the first two patches and the above diff.
* compare the meson.build files and libdpdk.pc files for the two cases. In
  my tests the second case as additional -I flags, but otherwise identical.

Regards,
/Bruce

  parent reply index

Thread overview: 59+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-16  7:16 [dpdk-dev] [PATCH 0/3] " Thomas Monjalon
2020-01-16  7:16 ` [dpdk-dev] [PATCH 1/3] buildtools: rework static pkg-config script Thomas Monjalon
2020-01-16  7:16 ` [dpdk-dev] [PATCH 2/3] build: allow to hide dependencies from pkg-config Thomas Monjalon
2020-01-17 17:34   ` Bruce Richardson
2020-01-16  7:16 ` [dpdk-dev] [PATCH 3/3] net/mlx: support static ibverbs linkage with meson Thomas Monjalon
2020-01-27 15:43 ` [dpdk-dev] [PATCH v2 0/4] add static ibverbs in meson Thomas Monjalon
2020-01-27 15:43   ` [dpdk-dev] [PATCH v2 1/4] net/mlx: add static ibverbs linkage with meson Thomas Monjalon
2020-01-27 15:44   ` [dpdk-dev] [PATCH v2 2/4] buildtools: get static mlx dependencies for meson Thomas Monjalon
2020-01-29 15:37     ` Bruce Richardson
2020-01-29 17:48       ` Thomas Monjalon
2020-01-29 17:50         ` Bruce Richardson
2020-01-29 18:49           ` Thomas Monjalon
2020-01-29 17:48       ` Bruce Richardson
2020-01-27 15:44   ` [dpdk-dev] [PATCH v2 3/4] build: allow hiding dependencies from pkg-config Thomas Monjalon
2020-01-27 15:44   ` [dpdk-dev] [PATCH v2 4/4] net/mlx: workaround static linkage with meson Thomas Monjalon
2020-02-04 11:48   ` Bruce Richardson [this message]
2020-02-04 14:27     ` [dpdk-dev] [PATCH v2 0/4] add static ibverbs in meson Thomas Monjalon
2020-02-04 14:33       ` Bruce Richardson
2020-02-04 15:14         ` Thomas Monjalon
2020-02-04 15:20           ` Bruce Richardson
2020-02-11  1:19   ` [dpdk-dev] [PATCH v3 0/5] mlx ibverbs linking " Thomas Monjalon
2020-02-11  1:19     ` [dpdk-dev] [PATCH v3 1/5] net/mlx: add static ibverbs linkage with meson Thomas Monjalon
2020-02-11  1:19     ` [dpdk-dev] [PATCH v3 2/5] buildtools: get static mlx dependencies for meson Thomas Monjalon
2020-02-11  1:19     ` [dpdk-dev] [PATCH v3 3/5] net/mlx: workaround static linkage with meson Thomas Monjalon
2020-02-11 11:29       ` Bruce Richardson
2020-02-11 11:36         ` Thomas Monjalon
2020-02-11 11:43           ` Bruce Richardson
2020-02-11  1:19     ` [dpdk-dev] [PATCH v3 4/5] net/mlx: rename meson variable for dlopen option Thomas Monjalon
2020-02-11  1:19     ` [dpdk-dev] [PATCH v3 5/5] net/mlx: fix overlinking with meson and glue dlopen Thomas Monjalon
2020-02-11 11:32       ` Bruce Richardson
2020-02-11 11:34         ` Thomas Monjalon
2020-02-11 11:33     ` [dpdk-dev] [PATCH v3 0/5] mlx ibverbs linking in meson Bruce Richardson
2020-02-12  1:59 ` [dpdk-dev] [PATCH v4 0/6] " Thomas Monjalon
2020-02-12  1:59   ` [dpdk-dev] [PATCH v4 1/6] drivers: cleanup meson build variable Thomas Monjalon
2020-02-12  9:26     ` Xu, Rosen
2020-02-12  9:32       ` Thomas Monjalon
2020-02-12 15:04         ` [dpdk-dev] [dpdklab] " Jeremy Plsek
2020-02-12 15:18           ` Jeremy Plsek
2020-02-12 16:30             ` Thomas Monjalon
2020-02-12 16:36               ` Jeremy Plsek
2020-02-12 16:42                 ` Thomas Monjalon
2020-02-12 16:46                   ` Jeremy Plsek
2020-02-12 17:38                     ` Thomas Monjalon
2020-02-12 18:03                       ` Jeremy Plsek
2020-02-12  1:59   ` [dpdk-dev] [PATCH v4 2/6] net/mlx: add static ibverbs linkage with meson Thomas Monjalon
2020-02-12  1:59   ` [dpdk-dev] [PATCH v4 3/6] buildtools: get static mlx dependencies for meson Thomas Monjalon
2020-02-12  1:59   ` [dpdk-dev] [PATCH v4 4/6] net/mlx: workaround static linkage with meson Thomas Monjalon
2020-02-12  1:59   ` [dpdk-dev] [PATCH v4 5/6] net/mlx: rename meson variable for dlopen option Thomas Monjalon
2020-02-12  1:59   ` [dpdk-dev] [PATCH v4 6/6] net/mlx: fix overlinking with meson and glue dlopen Thomas Monjalon
2020-02-12  2:08   ` [dpdk-dev] [PATCH v4 0/6] mlx ibverbs linking in meson Thomas Monjalon
2020-02-12 22:07 ` [dpdk-dev] [PATCH v5 " Thomas Monjalon
2020-02-12 22:07   ` [dpdk-dev] [PATCH v5 1/6] drivers: cleanup meson build variable Thomas Monjalon
2020-02-13  0:25     ` Xu, Rosen
2020-02-12 22:07   ` [dpdk-dev] [PATCH v5 2/6] net/mlx: add static ibverbs linkage with meson Thomas Monjalon
2020-02-12 22:07   ` [dpdk-dev] [PATCH v5 3/6] buildtools: get static mlx dependencies for meson Thomas Monjalon
2020-02-12 22:07   ` [dpdk-dev] [PATCH v5 4/6] net/mlx: workaround static linkage with meson Thomas Monjalon
2020-02-12 22:07   ` [dpdk-dev] [PATCH v5 5/6] net/mlx: rename meson variable for dlopen option Thomas Monjalon
2020-02-12 22:07   ` [dpdk-dev] [PATCH v5 6/6] net/mlx: fix overlinking with meson and glue dlopen Thomas Monjalon
2020-02-13 13:57   ` [dpdk-dev] [PATCH v5 0/6] mlx ibverbs linking in meson Raslan Darawsheh

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