patch 'build: fix linker warnings about undefined symbols' has been queued to stable release 23.11.1

[Xueming Li]

Hi,

FYI, your patch has been queued to stable release 23.11.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 03/31/24. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://git.dpdk.org/dpdk-stable/log/?h=23.11-staging

This queued commit can be viewed at:
https://git.dpdk.org/dpdk-stable/commit/?h=23.11-staging&id=5e24d7f2ded389295b24688a339b2139d5281941

Thanks.

Xueming Li <xuemingl at nvidia.com>

---
>From 5e24d7f2ded389295b24688a339b2139d5281941 Mon Sep 17 00:00:00 2001
From: Bruce Richardson <bruce.richardson at intel.com>
Date: Wed, 10 Jan 2024 15:01:03 +0000
Subject: [PATCH] build: fix linker warnings about undefined symbols
Cc: Xueming Li <xuemingl at nvidia.com>

[ upstream commit 51c9428dca9fad10bd60ca668ffdf78e4a801e2f ]

The default behaviour of "ld.lld" has changed, so it now prints out
warnings about entries in the version.map file which don't exist in
the current build. Since we use our version.map file simply to filter
out the functions we don't want made public, we include in it all
functions across all OS's and builds that we want public if present.
This causes these ld warnings to be emitted, e.g. on BSD, which is
missing functionality found on Linux. For example:

* hpet functions in EAL
* regexdev enqueue and dequeue burst
* eventdev event_timer functions

Easiest solution, without major rework of how we use our version.map
files, and without dynamically generating them per-build, is to pass
the --undefined-version flag to the linker, to restore the old
behaviour.

Signed-off-by: Bruce Richardson <bruce.richardson at intel.com>
---
 config/meson.build | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/config/meson.build b/config/meson.build
index a9ccd56deb..65662c5de3 100644
--- a/config/meson.build
+++ b/config/meson.build
@@ -188,6 +188,9 @@ dpdk_conf.set('RTE_ARCH_32', cc.sizeof('void *') == 4)

 if not is_windows
     add_project_link_arguments('-Wl,--no-as-needed', language: 'c')
+    if cc.has_link_argument('-Wl,--undefined-version')
+        add_project_link_arguments('-Wl,--undefined-version', language: 'c')
+    endif
 endif

 # use pthreads if available for the platform
--
2.34.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2024-03-05 17:39:32.504618451 +0800
+++ 0050-build-fix-linker-warnings-about-undefined-symbols.patch	2024-03-05 17:39:30.753566492 +0800
@@ -1 +1 @@
-From 51c9428dca9fad10bd60ca668ffdf78e4a801e2f Mon Sep 17 00:00:00 2001
+From 5e24d7f2ded389295b24688a339b2139d5281941 Mon Sep 17 00:00:00 2001
@@ -4,0 +5,3 @@
+Cc: Xueming Li <xuemingl at nvidia.com>
+
+[ upstream commit 51c9428dca9fad10bd60ca668ffdf78e4a801e2f ]
@@ -22,2 +24,0 @@
-
-Cc: stable at dpdk.org