From nobody Fri Sep 5 07:52:25 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 218B5C00528 for ; Sun, 23 Jul 2023 14:21:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229662AbjGWOVx (ORCPT ); Sun, 23 Jul 2023 10:21:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43460 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229469AbjGWOVv (ORCPT ); Sun, 23 Jul 2023 10:21:51 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C910CB8; Sun, 23 Jul 2023 07:21:50 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 66E5A60D36; Sun, 23 Jul 2023 14:21:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6C4A3C433C8; Sun, 23 Jul 2023 14:21:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1690122109; bh=P7IlLhixxEgKf7EpbN4DFFwoc1k1ZVIYZ+hvTtej5ok=; h=From:To:Cc:Subject:Date:From; b=Nf3VNf1VQPkyJzPRuDrzkcf1vm0BYDCgs5u38VttEdibhXOWuzQQSsD3WNFktN6xR ZgV4t4LN67chHoHXYej97xlQCGNic9iTMRBTL60pA1YBG14IARxvxa7fda8/4kxQK0 0/LBixFhlZKzcYZMAG1r5lA6FebXZvQZGDvoSO+/q2QVl7iJa4IeIhVJV3h/EbuIIy Ms1nownVv8FuDcm7l+X5tRzAUjtvWzYpdB4YG5OAjRhMGjIDXyZIU5DgUeuuhePlkb MEavIeV66nZVBoOYLSoc/bPX2f/BwWOdJdREhdEBcorsYvwzxyUZczqxsRtG7ijRo+ WrVow2dPnon/w== From: Miguel Ojeda To: Masahiro Yamada , Miguel Ojeda , Wedson Almeida Filho , Alex Gaynor Cc: Nathan Chancellor , Nick Desaulniers , Nicolas Schier , Boqun Feng , Gary Guo , =?UTF-8?q?Bj=C3=B6rn=20Roy=20Baron?= , Benno Lossin , Alice Ryhl , Andreas Hindborg , linux-kbuild@vger.kernel.org, rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, patches@lists.linux.dev, Raphael Nestler , Andrea Righi , stable@vger.kernel.org Subject: [PATCH v2] kbuild: rust: avoid creating temporary files Date: Sun, 23 Jul 2023 16:21:28 +0200 Message-ID: <20230723142128.194339-1-ojeda@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" `rustc` outputs by default the temporary files (i.e. the ones saved by `-Csave-temps`, such as `*.rcgu*` files) in the current working directory when `-o` and `--out-dir` are not given (even if `--emit=3Dx=3Dpath` is given, i.e. it does not use those for temporaries). Since out-of-tree modules are compiled from the `linux` tree, `rustc` then tries to create them there, which may not be accessible. Thus pass `--out-dir` explicitly, even if it is just for the temporary files. Similarly, do so for Rust host programs too. Reported-by: Raphael Nestler Closes: https://github.com/Rust-for-Linux/linux/issues/1015 Reported-by: Andrea Righi Tested-by: Raphael Nestler # non-hostprogs Tested-by: Andrea Righi # non-hostprogs Fixes: 295d8398c67e ("kbuild: specify output names separately for each emis= sion type from rustc") Cc: stable@vger.kernel.org Signed-off-by: Miguel Ojeda Tested-by: Martin Rodriguez Reboredo --- v2: - Add fix for host programs too (Masahiro). scripts/Makefile.build | 5 ++++- scripts/Makefile.host | 6 +++++- 2 files changed, 9 insertions(+), 2 deletions(-) diff --git a/scripts/Makefile.build b/scripts/Makefile.build index 6413342a03f4..82e3fb19fdaf 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -264,6 +264,9 @@ $(obj)/%.lst: $(src)/%.c FORCE =20 rust_allowed_features :=3D new_uninit =20 +# `--out-dir` is required to avoid temporaries being created by `rustc` in= the +# current working directory, which may be not accessible in the out-of-tree +# modules case. rust_common_cmd =3D \ RUST_MODFILE=3D$(modfile) $(RUSTC_OR_CLIPPY) $(rust_flags) \ -Zallow-features=3D$(rust_allowed_features) \ @@ -272,7 +275,7 @@ rust_common_cmd =3D \ --extern alloc --extern kernel \ --crate-type rlib -L $(objtree)/rust/ \ --crate-name $(basename $(notdir $@)) \ - --emit=3Ddep-info=3D$(depfile) + --out-dir $(dir $@) --emit=3Ddep-info=3D$(depfile) =20 # `--emit=3Dobj`, `--emit=3Dasm` and `--emit=3Dllvm-ir` imply a single cod= egen unit # will be used. We explicitly request `-Ccodegen-units=3D1` in any case, a= nd diff --git a/scripts/Makefile.host b/scripts/Makefile.host index 7aea9005e497..8f7f842b54f9 100644 --- a/scripts/Makefile.host +++ b/scripts/Makefile.host @@ -86,7 +86,11 @@ hostc_flags =3D -Wp,-MMD,$(depfile) \ hostcxx_flags =3D -Wp,-MMD,$(depfile) \ $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \ $(HOSTCXXFLAGS_$(target-stem).o) -hostrust_flags =3D --emit=3Ddep-info=3D$(depfile) \ + +# `--out-dir` is required to avoid temporaries being created by `rustc` in= the +# current working directory, which may be not accessible in the out-of-tree +# modules case. +hostrust_flags =3D --out-dir $(dir $@) --emit=3Ddep-info=3D$(depfile) \ $(KBUILD_HOSTRUSTFLAGS) $(HOST_EXTRARUSTFLAGS) \ $(HOSTRUSTFLAGS_$(target-stem)) =20 base-commit: 06c2afb862f9da8dc5efa4b6076a0e48c3fbaaa5 --=20 2.41.0