patch 'build: add libarchive to optional external dependencies' has been queued to stable release 21.11.6

[Richardson, Bruce]

After applying this patch, the link of DPDK may fail if all dependencies of libarchive are not installed. For some reason the install of the libarchive-dev package on many distros does not install all correct dependencies and the user needs to install a few other dev packages manually. (To me, this looks like something that could do with being fixed in the packages - it's not something we can really control)

Srikanth, do you think this patch needs to be backported? If there is no compelling need, I'd maybe avoid doing so to avoid possible unexpected build issues for users.

/Bruce

> -----Original Message-----
> From: Kevin Traynor <ktraynor at redhat.com>
> Sent: Thursday, November 16, 2023 1:23 PM
> To: Srikanth Yalavarthi <syalavarthi at marvell.com>
> Cc: Richardson, Bruce <bruce.richardson at intel.com>; dpdk stable
> <stable at dpdk.org>
> Subject: patch 'build: add libarchive to optional external dependencies'
> has been queued to stable release 21.11.6
> 
> Hi,
> 
> FYI, your patch has been queued to stable release 21.11.6
> 
> Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
> It will be pushed if I get no objections before 11/21/23. 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/aa40722948ac2dc15f93b8598f560029c757b645
> 
> Thanks.
> 
> Kevin
> 
> ---
> From aa40722948ac2dc15f93b8598f560029c757b645 Mon Sep 17 00:00:00 2001
> From: Srikanth Yalavarthi <syalavarthi at marvell.com>
> Date: Sun, 5 Nov 2023 20:12:43 -0800
> Subject: [PATCH] build: add libarchive to optional external dependencies
> 
> [ upstream commit 22f7184e8b5f1b546ac26dd0bde8c3c6038a7e03 ]
> 
> In order to avoid linking with Libs.private, libarchive
> is not added to ext_deps during the meson setup stage.
> 
> Since libarchive is not added to ext_deps, cross-compilation
> or native compilation with libarchive installed in non-standard
> location fails with errors related to "cannot find -larchive"
> or "archive.h: No such file or directory". In order to fix the
> build failures, user is required to define the 'c_args' and
> 'c_link_args' with '-I<includedir>' and '-L<libdir>'.
> 
> This patch adds libarchive to ext_deps and further would not
> require setting c_args and c_link_args externally.
> 
> Fixes: 40edb9c0d36b ("eal: handle compressed firmware")
> 
> Signed-off-by: Srikanth Yalavarthi <syalavarthi at marvell.com>
> Acked-by: Bruce Richardson <bruce.richardson at intel.com>
> ---
>  config/meson.build  | 5 -----
>  lib/eal/meson.build | 3 +++
>  2 files changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/config/meson.build b/config/meson.build
> index a79a3ed39c..b40302da02 100644
> --- a/config/meson.build
> +++ b/config/meson.build
> @@ -208,9 +208,4 @@ libarchive = dependency('libarchive', required: false,
> method: 'pkg-config')
>  if libarchive.found()
>      dpdk_conf.set('RTE_HAS_LIBARCHIVE', 1)
> -    # Push libarchive link dependency at the project level to support
> -    # statically linking dpdk apps. Details at:
> -    # https://inbox.dpdk.org/dev/20210605004024.660267a1@sovereign/
> -    add_project_link_arguments('-larchive', language: 'c')
> -    dpdk_extra_ldflags += '-larchive'
>  endif
> 
> diff --git a/lib/eal/meson.build b/lib/eal/meson.build
> index 1722924f67..f223c6d7a5 100644
> --- a/lib/eal/meson.build
> +++ b/lib/eal/meson.build
> @@ -23,4 +23,7 @@ if dpdk_conf.has('RTE_USE_LIBBSD')
>      ext_deps += libbsd
>  endif
> +if dpdk_conf.has('RTE_HAS_LIBARCHIVE')
> +    ext_deps += libarchive
> +endif
>  if cc.has_function('getentropy', prefix : '#include <unistd.h>')
>      cflags += '-DRTE_LIBEAL_USE_GETENTROPY'
> --
> 2.41.0
> 
> ---
>   Diff of the applied patch vs upstream commit (please double-check if
> non-empty:
> ---
> --- -	2023-11-16 13:21:53.587627939 +0000
> +++ 0043-build-add-libarchive-to-optional-external-dependenci.patch
> 	2023-11-16 13:21:52.506946538 +0000
> @@ -1 +1 @@
> -From 22f7184e8b5f1b546ac26dd0bde8c3c6038a7e03 Mon Sep 17 00:00:00 2001
> +From aa40722948ac2dc15f93b8598f560029c757b645 Mon Sep 17 00:00:00 2001
> @@ -5,0 +6,2 @@
> +[ upstream commit 22f7184e8b5f1b546ac26dd0bde8c3c6038a7e03 ]
> +
> @@ -20 +21,0 @@
> -Cc: stable at dpdk.org
> @@ -30 +31 @@
> -index 39ed4ba7d3..d732154731 100644
> +index a79a3ed39c..b40302da02 100644
> @@ -33 +34 @@
> -@@ -252,9 +252,4 @@ libarchive = dependency('libarchive', required:
> false, method: 'pkg-config')
> +@@ -208,9 +208,4 @@ libarchive = dependency('libarchive', required:
> false, method: 'pkg-config')
> @@ -44 +45 @@
> -index 9942104386..e1d6c4cf17 100644
> +index 1722924f67..f223c6d7a5 100644
> @@ -47 +48 @@
> -@@ -22,4 +22,7 @@ if dpdk_conf.has('RTE_USE_LIBBSD')
> +@@ -23,4 +23,7 @@ if dpdk_conf.has('RTE_USE_LIBBSD')