linux-kernel - [PATCH 2/2] kbuild: enable CONFIG

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Message-Id: <20250812-kbuild-werror-v1-2-36c9ff653700@linutronix.de>
Date: Tue, 12 Aug 2025 07:31:40 +0200
From: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
To: Nathan Chancellor <nathan@...nel.org>, 
 Nicolas Schier <nicolas.schier@...ux.dev>, Miguel Ojeda <ojeda@...nel.org>, 
 Alex Gaynor <alex.gaynor@...il.com>, Boqun Feng <boqun.feng@...il.com>, 
 Gary Guo <gary@...yguo.net>, 
 Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
 Benno Lossin <lossin@...nel.org>, Andreas Hindborg <a.hindborg@...nel.org>, 
 Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>, 
 Danilo Krummrich <dakr@...nel.org>
Cc: linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org, 
 rust-for-linux@...r.kernel.org, 
 Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Subject: [PATCH 2/2] kbuild: enable CONFIG_WERROR for more build steps

CONFIG_WERROR is useful for all build steps, not only compilation of C and
Rust sources linked into the kernel.

Also enable it for assembler and linker invocations, userprogs, as well as
C and Rust hostprogs.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
---
 scripts/Makefile.werror | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/scripts/Makefile.werror b/scripts/Makefile.werror
index db14b5490ba83444be39a18109f103cabc5b95e9..e741ae45757c7864f5132d37f39fa3fea5b9d247 100644
--- a/scripts/Makefile.werror
+++ b/scripts/Makefile.werror
@@ -7,5 +7,12 @@
 # ==========================================================================
 
 KBUILD_CPPFLAGS		+= -Werror
+KBUILD_AFLAGS		+= -Wa,--fatal-warnings
+KBUILD_LDFLAGS		+= --fatal-warnings
+KBUILD_USERCFLAGS	+= -Werror
+KBUILD_USERLDFLAGS	+= -Wl,--fatal-warnings
+KBUILD_HOSTCFLAGS	+= -Werror
+KBUILD_HOSTLDFLAGS	+= -Wl,--fatal-warnings
 
 KBUILD_RUSTFLAGS	+= -Dwarnings
+KBUILD_HOSTRUSTFLAGS	+= -Dwarnings

-- 
2.50.1