From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f178.google.com (mail-il1-f178.google.com [209.85.166.178]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0CD073232 for ; Mon, 12 Sep 2022 16:18:54 +0000 (UTC) Received: by mail-il1-f178.google.com with SMTP id s11so4785304ilt.7 for ; Mon, 12 Sep 2022 09:18:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date; bh=dKtqFa8Lj7sKVbipP1evfO/jZ1JEKgMyQWZPo5L2svY=; b=LYJrUWkBI5r0+ftj5RafEIHZV3TKIYV+GtfpLp5bklqBn7NVcwrDDRIvV40oAViNnw PAYijJ1aNQ4wlDinX3lV3rhtEr6tMQHvjF4Qpem/VsESXWSpyHspJurr8+MBPgRUnyS1 JSyYvDet2ykXQxZD7W0xJQ/PbXRNVY8laRRXUVrXu8sLgFQQEl/CQnZve/OUnnSCjOC9 SWBwhTCcO23qhLn2kVpDFhkjIR4NmaqXoDjc0wRMDxkqLUhcCuzscCc2alA3Bl4rAfUt b5JxVOVq1YMz+KhSjV168EA76QkBJyrj/895rj3CdO4d8Ut7a/C9fvaelZoVGDGCEllR K/2Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date; bh=dKtqFa8Lj7sKVbipP1evfO/jZ1JEKgMyQWZPo5L2svY=; b=KRlxzSH/xhs4eQlxxQURBaoG8xNJIXhtbVcIod88q73XAKop43eOmkzK8t7w8bco9j fz42eAKMPnTezWhm/U6l8LvIuCXRZOXO3xXR3w3vKcPzbMuZ83y4xf9OiU0CECUDKpdX VLYYam5FEt8dplw5/Pr3d8gNqw93fP9kTVqGK12sNfOWfSRqMWbcAr454a54c4UnX8Hb tBuPfEeLFd18Wwz9R3AcRRhIHiy1uC92GS5c6FEL3K0iXO0PO/oI3Cycv4GNG/LtLr6U jmKdqGWKH+IdR8wNc/ty6Ui2lA2VJeII2swSyQA8HYGlMz5esXThNykBMUcyrtZzc5vi 2HnA== X-Gm-Message-State: ACgBeo2jwchAgE7PRRZ2z4xRPv0Gor8Ak4I7QFeuEuzCNG3xrpUVomTI UqTWjlj3+pi5HJnTteapYInsk1K8ClNTTlaNNTU= X-Google-Smtp-Source: AA6agR6MemFAoJLParyi3ed9uKb3AZKl39DwttCreIuRBOy0bqj7TVF1woYsiMJbd8RxkweMyI0pKSKSOrXHyq4gx6o= X-Received: by 2002:a05:6e02:1aac:b0:2f1:94e3:1805 with SMTP id l12-20020a056e021aac00b002f194e31805mr10813730ilv.72.1662999534105; Mon, 12 Sep 2022 09:18:54 -0700 (PDT) Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 References: <20220805154231.31257-1-ojeda@kernel.org> <20220805154231.31257-24-ojeda@kernel.org> In-Reply-To: From: Miguel Ojeda Date: Mon, 12 Sep 2022 17:18:43 +0100 Message-ID: Subject: Re: [PATCH v9 23/27] Kbuild: add Rust support To: Masahiro Yamada Cc: Miguel Ojeda , Linus Torvalds , Greg Kroah-Hartman , rust-for-linux@vger.kernel.org, Linux Kernel Mailing List , Linux FS-devel Mailing List , patches@lists.linux.dev, Jarkko Sakkinen , Alex Gaynor , Finn Behrens , Adam Bratschi-Kaye , Wedson Almeida Filho , Michael Ellerman , Sven Van Asbroeck , Gary Guo , Boris-Chengbiao Zhou , Boqun Feng , Douglas Su , Dariusz Sosnowski , Antonio Terceiro , Daniel Xu , =?UTF-8?Q?Bj=C3=B6rn_Roy_Baron?= , Martin Rodriguez Reboredo , Michal Marek , Nick Desaulniers , Linux Kbuild mailing list Content-Type: text/plain; charset="UTF-8" Hi Masahiro, On Mon, Sep 12, 2022 at 5:08 PM Masahiro Yamada wrote: > > I have not figured out where this difference comes from. It is the `RUSTC_BOOTSTRAP` environment variable: it allows to use unstable featuers in the stable compiler. We currently set it in the global `Makefile`, but we could be more explicit and do it on each command if you think that would be better. If you want that we keep using the global export, then we can add a comment explaining this to clarify. Cheers, Miguel