patch 'build: fix linker warnings about undefined symbols' has been queued to stable release 21.11.7

[Kevin Traynor]

Hi,

FYI, your patch has been queued to stable release 21.11.7

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 03/11/24. 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://github.com/kevintraynor/dpdk-stable

This queued commit can be viewed at:
https://github.com/kevintraynor/dpdk-stable/commit/d27dfc1a757f032cc07eea5c6cc76d8e98765b88

Thanks.

Kevin

---
>From d27dfc1a757f032cc07eea5c6cc76d8e98765b88 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

[ 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 a79a3ed39c..63a4eb9f7e 100644
--- a/config/meson.build
+++ b/config/meson.build
@@ -145,4 +145,7 @@ 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
 
-- 
2.43.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2024-03-05 14:08:55.318343313 +0000
+++ 0026-build-fix-linker-warnings-about-undefined-symbols.patch	2024-03-05 14:08:54.640520739 +0000
@@ -1 +1 @@
-From 51c9428dca9fad10bd60ca668ffdf78e4a801e2f Mon Sep 17 00:00:00 2001
+From d27dfc1a757f032cc07eea5c6cc76d8e98765b88 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 51c9428dca9fad10bd60ca668ffdf78e4a801e2f ]
+
@@ -23,2 +24,0 @@
-Cc: stable at dpdk.org
-
@@ -31 +31 @@
-index a9ccd56deb..65662c5de3 100644
+index a79a3ed39c..63a4eb9f7e 100644
@@ -34 +34 @@
-@@ -189,4 +189,7 @@ dpdk_conf.set('RTE_ARCH_32', cc.sizeof('void *') == 4)
+@@ -145,4 +145,7 @@ dpdk_conf.set('RTE_ARCH_32', cc.sizeof('void *') == 4)