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Sat, 04 Oct 2025 18:11:04 -0700 (PDT) From: Askar Safin To: thomas.weissschuh@linutronix.de Cc: a.hindborg@kernel.org, alex.gaynor@gmail.com, aliceryhl@google.com, bjorn3_gh@protonmail.com, boqun.feng@gmail.com, dakr@kernel.org, gary@garyguo.net, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, lossin@kernel.org, nathan@kernel.org, nicolas.schier@linux.dev, ojeda@kernel.org, rust-for-linux@vger.kernel.org, tmgross@umich.edu Subject: Re: [PATCH v2 6/6] kbuild: enable -Werror for hostprogs Date: Sun, 5 Oct 2025 04:10:47 +0300 Message-ID: <20251005011100.1035272-1-safinaskar@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20250814-kbuild-werror-v2-6-c01e596309d2@linutronix.de> References: <20250814-kbuild-werror-v2-6-c01e596309d2@linutronix.de> Precedence: bulk X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit "Thomas Weißschuh" : > Enable -Werror unconditionally Please, drop this patch. Never enable -Werror unconditionally for any part of build. I often bisect Linux. And to do this, I often need to build very old Linux commits (with modern compiler). Unconditional -Werror will make this impossible. For example, recently I found this regression: https://lore.kernel.org/regressions/197f290e30b.eaadc7bc7913.7315623184036672946@zohomail.com/T/#u The regression caused by commits happened in 2019. So to bisect it, I had to build 2019 trees using modern compiler. -- Askar Safin