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AJvYcCWwUOWAmSgd1udPmYMQVRVEfi76301UylD+yYWZtp4P86LgnSqmi7M5gRpbXXL6G52STv89IDGepdgmYEaVlA==@vger.kernel.org X-Gm-Message-State: AOJu0YwXHm5oe/kU6eVzSMvMXMKkhVqf5hNR8qfGezzBOjAbUI2xRCzf BuRnxsK7v3FJmdYUOTCw+jpMbNsBHK8+nXEmYjQnCINNmwcC2UAXytJJWKPXTiDTR8YgbTXHj4s 6Gc5iRZgsxKXVkB/1F9gEQS3iPigxWE9G8LOB8g== X-Google-Smtp-Source: AGHT+IGyowJOWGUWAKF2NVl2DVZ7EqWnGUFKSfa0zIPMF+JmPrRPt6l+JRpnKHOqXHz5x05oV7aAmMN8LnpJhXdpZvI= X-Received: by 2002:a05:690c:6bc6:b0:6db:dede:ec63 with SMTP id 00721157ae682-6e2475e8caamr69779507b3.28.1727643640240; Sun, 29 Sep 2024 14:00:40 -0700 (PDT) Precedence: bulk X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 References: <20240913213041.395655-1-gary@garyguo.net> <20240913213041.395655-2-gary@garyguo.net> In-Reply-To: <20240913213041.395655-2-gary@garyguo.net> From: Trevor Gross Date: Sun, 29 Sep 2024 17:00:29 -0400 Message-ID: Subject: Re: [PATCH 1/5] rust: fix size_t in bindgen prototypes of C builtins To: Gary Guo Cc: Miguel Ojeda , Alex Gaynor , Wedson Almeida Filho , Boqun Feng , =?UTF-8?Q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Fri, Sep 13, 2024 at 5:32=E2=80=AFPM Gary Guo wrote: > -bindgen_c_flags_final =3D $(bindgen_c_flags_lto) -D__BINDGEN__ > +# `-fno-builtin` is passed to avoid bindgen from using clang builtin pro= totypes > +# for functions like `memcpy` -- if this flag is not passed, bindgen-gen= erated > +# prototypes use `c_ulong` or `c_uint` depending on architecture instead= of > +# generating `usize`. > +bindgen_c_flags_final =3D $(bindgen_c_flags_lto) -fno-builtin -D__BINDGE= N__ I wonder how reliable this behavior is. Maybe bindgen could do a better job controlling this, is there an open issue? - Trevor