[dpdk-stable] patch 'config/ppc: ignore GCC 11 psabi warnings' has been queued to stable release 20.11.4

[Xueming Li]

Hi,

FYI, your patch has been queued to stable release 20.11.4

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 11/12/21. 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/steevenlee/dpdk

This queued commit can be viewed at:
https://github.com/steevenlee/dpdk/commit/c3672a36e6fdf7cc3402ea2ce3c475df0d645c2b

Thanks.

Xueming Li <xuemingl at nvidia.com>

---
>From c3672a36e6fdf7cc3402ea2ce3c475df0d645c2b Mon Sep 17 00:00:00 2001
From: David Christensen <drc at linux.vnet.ibm.com>
Date: Thu, 2 Sep 2021 16:53:26 -0700
Subject: [PATCH] config/ppc: ignore GCC 11 psabi warnings
Cc: Xueming Li <xuemingl at nvidia.com>

[ upstream commit 394407f50c90ca3ce4b882aefb9e26eae4ba6bca ]

Suppress the gcc warning "note: the layout of aggregates containing
vectors with 4-byte alignment has changed in GCC 5" on POWER systems
by setting "-Wno-psabi".  Warning was originally added to gcc in
commit https://gcc.gnu.org/git/gitweb.cgi?p=gcc.git;h=9832651 to warn
of the vector alignment changes introduced in GCC 5.  Older gcc
versions forced vector alignment to 16 bytes due to requirements for
POWER 6 and earlier CPUs, but these restrictions don't apply to CPUs
supported by DPDK.

Bugzilla ID: 739

Signed-off-by: David Christensen <drc at linux.vnet.ibm.com>
---
 config/ppc/meson.build | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/config/ppc/meson.build b/config/ppc/meson.build
index ed6ea07d24..bea72f86b5 100644
--- a/config/ppc/meson.build
+++ b/config/ppc/meson.build
@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2018 Luca Boccassi <bluca at debian.org>
+# Copyright(c) 2021 IBM Corporation
 
 if not dpdk_conf.get('RTE_ARCH_64')
 	error('Only 64-bit compiles are supported for this platform type')
@@ -17,6 +18,13 @@ if not power9_supported
 	dpdk_conf.set('RTE_MACHINE','power8')
 endif
 
+# Suppress the gcc warning "note: the layout of aggregates containing
+# vectors with 4-byte alignment has changed in GCC 5".
+if cc.get_id() == 'gcc' and cc.version().version_compare('>=10.0') and
+        cc.version().version_compare('<12.0') and cc.has_argument('-Wno-psabi')
+    add_project_arguments('-Wno-psabi', language: 'c')
+endif
+
 # Certain POWER9 systems can scale as high as 1536 LCORES, but setting such a
 # high value can waste memory, cause timeouts in time limited autotests, and is
 # unlikely to be used in many production situations.  Similarly, keeping the
-- 
2.33.0

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-11-10 14:17:02.886643807 +0800
+++ 0017-config-ppc-ignore-GCC-11-psabi-warnings.patch	2021-11-10 14:17:01.754080379 +0800
@@ -1 +1 @@
-From 394407f50c90ca3ce4b882aefb9e26eae4ba6bca Mon Sep 17 00:00:00 2001
+From c3672a36e6fdf7cc3402ea2ce3c475df0d645c2b Mon Sep 17 00:00:00 2001
@@ -4,0 +5,3 @@
+Cc: Xueming Li <xuemingl at nvidia.com>
+
+[ upstream commit 394407f50c90ca3ce4b882aefb9e26eae4ba6bca ]
@@ -16 +18,0 @@
-Cc: stable at dpdk.org
@@ -24 +26 @@
-index adf49e1f42..0b1948fc7c 100644
+index ed6ea07d24..bea72f86b5 100644
@@ -33 +35 @@
-     error('Only 64-bit compiles are supported for this platform type')
+ 	error('Only 64-bit compiles are supported for this platform type')
@@ -35 +37 @@
-     dpdk_conf.set('RTE_MACHINE','power8')
+ 	dpdk_conf.set('RTE_MACHINE','power8')