Re: FAILED: patch "[PATCH] kbuild: userprogs: fix bitsize and target detection on clang" failed to apply to 5.4-stable tree

[Nathan Chancellor <nathan@kernel.org>]

On Tue, Jun 17, 2025 at 05:08:33PM +0200, gregkh@linuxfoundation.org wrote:
> From 1b71c2fb04e7a713abc6edde4a412416ff3158f2 Mon Sep 17 00:00:00 2001
> From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= <thomas.weissschuh@linutronix.de>
> Date: Thu, 13 Feb 2025 15:55:17 +0100
> Subject: [PATCH] kbuild: userprogs: fix bitsize and target detection on clang
> MIME-Version: 1.0
> Content-Type: text/plain; charset=UTF-8
> Content-Transfer-Encoding: 8bit
> 
> scripts/Makefile.clang was changed in the linked commit to move --target from
> KBUILD_CFLAGS to KBUILD_CPPFLAGS, as that generally has a broader scope.
> However that variable is not inspected by the userprogs logic,
> breaking cross compilation on clang.
> 
> Use both variables to detect bitsize and target arguments for userprogs.
> 
> Fixes: feb843a469fb ("kbuild: add $(CLANG_FLAGS) to KBUILD_CPPFLAGS")
> Cc: stable@vger.kernel.org
> Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
> Reviewed-by: Nathan Chancellor <nathan@kernel.org>
> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

Thanks for figuring out that I missed picking this up in my backports.
This is not needed in 5.4 because the userprogs infrastructure was added
in 5.8 with commit 7f3a59db274c ("kbuild: add infrastructure to build
userspace programs").

Cheers,
Nathan