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[89.208.240.37]) by smtp.gmail.com with ESMTPSA id 00721157ae682-78821de192asm33464657b3.8.2025.11.16.06.36.18 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 16 Nov 2025 06:36:24 -0800 (PST) From: Asuna X-Google-Original-From: Asuna Message-ID: <0bc61e6e-8a27-4711-8ce0-60b1e300ac31@gmail.com> Date: Sun, 16 Nov 2025 22:36:16 +0800 Precedence: bulk X-Mailing-List: linux-kbuild@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3] RISC-V: re-enable gcc + rust builds To: Vivian Wang , Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?UTF-8?Q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Jonathan Corbet , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , Han Gao , Jason Montleon , Conor Dooley Cc: rust-for-linux@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kbuild@vger.kernel.org, llvm@lists.linux.dev References: <20250914-gcc-rust-v3-v3-1-34d4d5864144@gmail.com> <73d55231-d1e5-400d-9446-1914a78c0db8@iscas.ac.cn> Content-Language: en-US In-Reply-To: <73d55231-d1e5-400d-9446-1914a78c0db8@iscas.ac.cn> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hi everyone. Sorry I was inactive on this patch for a while. I'm getting back into this work. On 9/19/25 1:20 PM, Vivian Wang wrote: > I think instead of testing libclang version, it would make more sense to > feature test if bindgen the binary supports these flags, like what we > already do with $(cc-option,...). > > Same for all the other version tests. Conor, since you've reviewed the v3 patch, do you think Vivian's suggestion is a better solution? If so, I can start trying to make a v4 patch towards that path in the next few days. On 9/19/25 1:20 PM, Vivian Wang wrote: >> [...] >> >> +config TOOLCHAIN_MATCHES_ZICSR_ZIFENCEI > TOOLCHAIN_ACCEPTS_ZICSR_ZIFENCEI? The word "accepts" is not very clear to me, as this option may also be YES when the toolchain does not recognize Zicsr/Zifencei in -march. Zicsr/Zifencei are always enabled, this option actually detects if the same flags related to Zicsr/Zifencei (-march=_zicsr_zifencei or -misa-spec=2.2) can be recognized in multiple toolchains at the same time without causing any errors.