linux-kernel - Re: [PATCH] kbuild: readd -w option when vmlinux.o or Module.symver is missing

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Date:   Wed, 4 Jan 2023 21:34:02 -0600
From:   Samuel Holland <samuel@...lland.org>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        Christopher Schramm <debian@...hramm.eu>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nicolas Schier <nicolas@...sle.eu>,
        linux-kbuild@...r.kernel.org
Subject: Re: [PATCH] kbuild: readd -w option when vmlinux.o or Module.symver
 is missing

On 1/4/23 08:04, Masahiro Yamada wrote:
> Commit 63ffe00d8c93 ("kbuild: Fix running modpost with musl libc")
> accidentally turned the unresolved symbol warnings into errors when
> vmlinux.o (for in-tree builds) or Module.symver (for external module
> builds) is missing.
> 
> In those cases, unresolved symbols are expected, but the -w option
> is not set because 'missing-input' is referenced before set.
> 
> Move $(missing-input back to the original place. This should be fine
> for musl libc because vmlinux.o and -w are not added at the same time.
> 
> With this change, -w may be passed twice, but it is not a big deal.
> 
> Link: https://lore.kernel.org/all/b56a03b8-2a2a-f833-a5d2-cdc50a7ca2bb@cschramm.eu/
> Fixes: 63ffe00d8c93 ("kbuild: Fix running modpost with musl libc")
> Reported-by: Christopher Schramm <debian@...hramm.eu>
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
> ---
> 
>  scripts/Makefile.modpost | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)

Sorry for the breakage. This works fine for me, with or without vmlinux.o.

Tested-by: Samuel Holland <samuel@...lland.org>