patch 'build: fix warning about using -Wextra flag' has been queued to stable release 20.11.5

[Richardson, Bruce]

I'm a little conflicted about this patch being backported. While it's probably safe enough, since it only affects warnings, it's probably unnecessary to backport.
I'll defer to your judgement, Luca, as LTS maintainer.

> -----Original Message-----
> From: luca.boccassi at gmail.com <luca.boccassi at gmail.com>
> Sent: Friday, February 18, 2022 12:39 PM
> To: Richardson, Bruce <bruce.richardson at intel.com>
> Cc: Luca Boccassi <bluca at debian.org>; dpdk stable <stable at dpdk.org>
> Subject: patch 'build: fix warning about using -Wextra flag' has been
> queued to stable release 20.11.5
> 
> Hi,
> 
> FYI, your patch has been queued to stable release 20.11.5
> 
> Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
> It will be pushed if I get no objections before 02/20/22. 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/bluca/dpdk-stable
> 
> This queued commit can be viewed at:
> https://github.com/bluca/dpdk-
> stable/commit/3215df7480e04af0ce177c5320d6c580bedec99a
> 
> Thanks.
> 
> Luca Boccassi
> 
> ---
> From 3215df7480e04af0ce177c5320d6c580bedec99a Mon Sep 17 00:00:00 2001
> From: Bruce Richardson <bruce.richardson at intel.com>
> Date: Fri, 21 Jan 2022 16:12:30 +0000
> Subject: [PATCH] build: fix warning about using -Wextra flag
> 
> [ upstream commit d832326ae9b1b67c2976da293a459b51297fcfa0 ]
> 
> Each build, meson would issue a warning reporting that the
> "warning_level" setting should be used in place of adding -Wextra
> directly to our build commands. Testing with meson 0.61 shows that the
> only difference for gcc and clang builds between warning levels 1 and
> 2 is the addition of -Wextra, so we can remove the warning by deleting
> our explicit set of Wextra and changing the build defaults to
> warning_level 2.
> 
> Fixes: 524a0d5d66b9 ("build: enable extra warnings with meson")
> 
> Signed-off-by: Bruce Richardson <bruce.richardson at intel.com>
> Acked-by: Luca Boccassi <bluca at debian.org>
> ---
>  config/meson.build | 5 ++---
>  meson.build        | 6 +++++-
>  2 files changed, 7 insertions(+), 4 deletions(-)
> 
> diff --git a/config/meson.build b/config/meson.build
> index 7275946e66..bd50f189e0 100644
> --- a/config/meson.build
> +++ b/config/meson.build
> @@ -194,10 +194,9 @@ endif
>  add_project_arguments('-include', 'rte_config.h', language: 'c')
> 
>  # enable extra warnings and disable any unwanted warnings
> +# -Wall is added by default at warning level 1, and -Wextra
> +# at warning level 2 (DPDK default)
>  warning_flags = [
> -	# -Wall is added by meson by default, so add -Wextra only
> -	'-Wextra',
> -
>  	# additional warnings in alphabetical order
>  	'-Wcast-qual',
>  	'-Wdeprecated',
> diff --git a/meson.build b/meson.build
> index 4463c40018..8eeb0ff8d8 100644
> --- a/meson.build
> +++ b/meson.build
> @@ -7,7 +7,11 @@ project('DPDK', 'C',
>  	version: run_command(find_program('cat', 'more'),
>  		files('VERSION'), check: true).stdout().strip(),
>  	license: 'BSD',
> -	default_options: ['buildtype=release', 'default_library=static'],
> +	default_options: [
> +		'buildtype=release',
> +		'default_library=static',
> +		'warning_level=2',
> +	],
>  	meson_version: '>= 0.47.1'
>  )
> 
> --
> 2.30.2
> 
> ---
>   Diff of the applied patch vs upstream commit (please double-check if
> non-empty:
> ---
> --- -	2022-02-18 12:37:40.641036173 +0000
> +++ 0069-build-fix-warning-about-using-Wextra-flag.patch	2022-02-18
> 12:37:37.746793171 +0000
> @@ -1 +1 @@
> -From d832326ae9b1b67c2976da293a459b51297fcfa0 Mon Sep 17 00:00:00 2001
> +From 3215df7480e04af0ce177c5320d6c580bedec99a Mon Sep 17 00:00:00 2001
> @@ -5,0 +6,2 @@
> +[ upstream commit d832326ae9b1b67c2976da293a459b51297fcfa0 ]
> +
> @@ -24 +26 @@
> -index ee12318d4f..7134e80e8d 100644
> +index 7275946e66..bd50f189e0 100644
> @@ -27 +29 @@
> -@@ -247,10 +247,9 @@ endif
> +@@ -194,10 +194,9 @@ endif
> @@ -34,2 +36,2 @@
> --        # -Wall is added by meson by default, so add -Wextra only
> --        '-Wextra',
> +-	# -Wall is added by meson by default, so add -Wextra only
> +-	'-Wextra',
> @@ -37,3 +39,3 @@
> -         # additional warnings in alphabetical order
> -         '-Wcast-qual',
> -         '-Wdeprecated',
> + 	# additional warnings in alphabetical order
> + 	'-Wcast-qual',
> + 	'-Wdeprecated',
> @@ -41 +43 @@
> -index 1223b79d74..3d97e96f38 100644
> +index 4463c40018..8eeb0ff8d8 100644
> @@ -45,10 +47,10 @@
> -         version: run_command(find_program('cat', 'more'),
> -             files('VERSION'), check: true).stdout().strip(),
> -         license: 'BSD',
> --        default_options: ['buildtype=release',
> 'default_library=static'],
> -+        default_options: [
> -+            'buildtype=release',
> -+            'default_library=static',
> -+            'warning_level=2',
> -+        ],
> -         meson_version: '>= 0.49.2'
> + 	version: run_command(find_program('cat', 'more'),
> + 		files('VERSION'), check: true).stdout().strip(),
> + 	license: 'BSD',
> +-	default_options: ['buildtype=release', 'default_library=static'],
> ++	default_options: [
> ++		'buildtype=release',
> ++		'default_library=static',
> ++		'warning_level=2',
> ++	],
> + 	meson_version: '>= 0.47.1'