linux-kernel - Re: [PATCH] kbuild: deb-pkg: Add libdw-dev:native to Build-Depends-Arch

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Message-ID: <3e52d80d-0c60-4df5-8cb5-21d4b1fce7b7@suse.com>
Date: Fri, 28 Mar 2025 11:19:16 +0100
From: Petr Pavlu <petr.pavlu@...e.com>
To: WangYuli <wangyuli@...ontech.com>
Cc: masahiroy@...nel.org, nathan@...nel.org, nicolas@...sle.eu,
 linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
 samitolvanen@...gle.com, zhanjun@...ontech.com, niecheng1@...ontech.com,
 guanwentao@...ontech.com
Subject: Re: [PATCH] kbuild: deb-pkg: Add libdw-dev:native to
 Build-Depends-Arch

On 3/26/25 18:41, WangYuli wrote:
> The dwarf.h header, which is included by
> scripts/gendwarfksyms/gendwarfksyms.h, resides within the libdw-dev
> package.
> 
> This portion of the code is compiled under the condition that
> CONFIG_GENDWARFKSYMS is enabled.
> 
> Consequently, add libdw-dev to Build-Depends-Arch to prevent
> unforeseen compilation failures.
> 
> Fix follow possible error:
>   In file included from scripts/gendwarfksyms/cache.c:6:
>   scripts/gendwarfksyms/gendwarfksyms.h:6:10: fatal error: 'dwarf.h' file not found
>       6 | #iIn file included from nscripts/gendwarfksyms/symbols.cc:lude6 :
>   <dwarf.hscripts/gendwarfksyms/gendwarfksyms.h>:6
>   :      10| :          ^~~~~~~~~
>   fatal error: 'dwarf.h' file not found
>     6 | #include <dwarf.h>
>       |          ^~~~~~~~~
> 
> Fixes: f28568841ae0 ("tools: Add gendwarfksyms")
> Signed-off-by: WangYuli <wangyuli@...ontech.com>
> ---
>  scripts/package/mkdebian | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/scripts/package/mkdebian b/scripts/package/mkdebian
> index 0178000197fe..25edee97fff7 100755
> --- a/scripts/package/mkdebian
> +++ b/scripts/package/mkdebian
> @@ -209,7 +209,7 @@ Rules-Requires-Root: no
>  Build-Depends: debhelper-compat (= 12)
>  Build-Depends-Arch: bc, bison, flex,
>   gcc-${host_gnu} <!pkg.${sourcename}.nokernelheaders>,
> - kmod, libelf-dev:native,
> + kmod, libdw-dev:native, libelf-dev:native,
>   libssl-dev:native, libssl-dev <!pkg.${sourcename}.nokernelheaders>,
>   python3:native, rsync
>  Homepage: https://www.kernel.org/

If scripts/package/mkdebian is updated in this way then I think
scripts/package/mkspec -> scripts/package/kernel.spec should be adjusted
as well for consistency.

File scripts/package/kernel.spec contains:
BuildRequires: (elfutils-libelf-devel or libelf-devel) flex

elfutils-libelf-devel is for Fedora/RH distros, libelf-devel is for
(open)SUSE.

If I'm looking correctly, a new dependency to make dwarf.h available for
both would be:
BuildRequires: elfutils-devel or libdw-devel

-- 
Thanks,
Petr