From nobody Mon Nov 25 13:29:07 2024 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D9212C13B; Sun, 27 Oct 2024 14:56:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730041019; cv=none; b=pTgkUws9hS+d4dgxIsw4wMPzZgZ0wKHd0MlUAwtMyh2LpvxU86fW0A8HXrc5J9E6Wwrb4HvkJZUaPqBfgGC7tqKldYGzyR43A0VVibeWtBg09ceqvKUKalMVEJuxY7YH8enJOi212BlUxNLkp+aSFSMNLtpPPKlpfIcEzXlTddY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730041019; c=relaxed/simple; bh=7ZZH3dE8R6xGp6O0QBNTJfT3j6IIfvB12djZK2Q9kDY=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=H96tj28H29LfnroDc5T3aOi7UaBLpSuKjGXjMs39C7XMFid3dgdy9q9qdGOzaQNUqM4c/WSfmeYNwT43tUIN2TgJbqI42jbO662Hq75U6amvHrkLITnGh0ulyWQV2HxE7nK700tFC0bi7cZa8jxX8T3xiuM/v6oKwu/hHv07gSU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=SLGvJKtX; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="SLGvJKtX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 56D9CC4CEC3; Sun, 27 Oct 2024 14:56:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1730041018; bh=7ZZH3dE8R6xGp6O0QBNTJfT3j6IIfvB12djZK2Q9kDY=; h=From:To:Cc:Subject:Date:From; b=SLGvJKtX4DKXURQNQNzsXcOyZRL6H8lSqMHh3s4BIk3tBSb3+tn/AtUK4ifY8N2zW UEUCKlhlKYWpI003y5KRXD+N5nxMOWB9kijonAyUcI2VjBB3U3of98sxCHqM2jEhEA HNIIKrT3H2Odk+VS7nvHmJTTE7aIrckMOxwD/xw/XKZVrQ2wCs5CO7yIHSLAd1shV4 S9USUxCHSLGhwsLR3veVb2ffQEQGCw2EIs6jkKj3189uXfioWVyA6HdebKlnGtqOWB fDjTIho6Hpokac1n3AaQqZnzRW8/2UiTgub0SVkDZ/2J6nO3PYQ48L3Ohs2YaGtk8t Q13iWYHzjgyEg== From: Miguel Ojeda To: Miguel Ojeda , Alex Gaynor , Masahiro Yamada Cc: Boqun Feng , Gary Guo , =?UTF-8?q?Bj=C3=B6rn=20Roy=20Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , rust-for-linux@vger.kernel.org, Nathan Chancellor , Nicolas Schier , linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, patches@lists.linux.dev, Thorsten Leemhuis , Cameron MacPherson Subject: [PATCH] kbuild: rust: avoid errors with old `rustc`s without LLVM patch version Date: Sun, 27 Oct 2024 15:56:36 +0100 Message-ID: <20241027145636.416030-1-ojeda@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Some old versions of `rustc` did not report the LLVM version without the patch version, e.g.: $ rustc --version --verbose rustc 1.48.0 (7eac88abb 2020-11-16) binary: rustc commit-hash: 7eac88abb2e57e752f3302f02be5f3ce3d7adfb4 commit-date: 2020-11-16 host: x86_64-unknown-linux-gnu release: 1.48.0 LLVM version: 11.0 Which would make the new `scripts/rustc-llvm-version.sh` fail and, in turn, the build: $ make LLVM=3D1 SYNC include/config/auto.conf.cmd ./scripts/rustc-llvm-version.sh: 13: arithmetic expression: expecting p= rimary: "10000 * 10 + 100 * 0 + " init/Kconfig:83: syntax error init/Kconfig:83: invalid statement make[3]: *** [scripts/kconfig/Makefile:85: syncconfig] Error 1 make[2]: *** [Makefile:679: syncconfig] Error 2 make[1]: *** [/home/cam/linux/Makefile:780: include/config/auto.conf.cm= d] Error 2 make: *** [Makefile:224: __sub-make] Error 2 Since we do not need to support such binaries, we can avoid adding logic for computing `rustc`'s LLVM version for those old binaries. Thus, instead, just make the match stricter. Other `rustc` binaries (even newer) did not report the LLVM version at all, but that was fine, since it would not match "LLVM", e.g.: $ rustc --version --verbose rustc 1.49.0 (e1884a8e3 2020-12-29) binary: rustc commit-hash: e1884a8e3c3e813aada8254edfa120e85bf5ffca commit-date: 2020-12-29 host: x86_64-unknown-linux-gnu release: 1.49.0 Cc: Thorsten Leemhuis Cc: Gary Guo Reported-by: Cameron MacPherson Closes: https://bugzilla.kernel.org/show_bug.cgi?id=3D219423 Fixes: af0121c2d303 ("kbuild: rust: add `CONFIG_RUSTC_LLVM_VERSION`") Signed-off-by: Miguel Ojeda Reviewed-by: Nathan Chancellor Tested-by: Cameron MacPherson Tested-by: Nathan Chancellor --- scripts/rustc-llvm-version.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scripts/rustc-llvm-version.sh b/scripts/rustc-llvm-version.sh index b6063cbe5bdc..a500d1ae3101 100755 --- a/scripts/rustc-llvm-version.sh +++ b/scripts/rustc-llvm-version.sh @@ -13,7 +13,7 @@ get_canonical_version() echo $((10000 * $1 + 100 * $2 + $3)) } =20 -if output=3D$("$@" --version --verbose 2>/dev/null | grep LLVM); then +if output=3D$("$@" --version --verbose 2>/dev/null | grep -E 'LLVM.*[0-9]+= \.[0-9]+\.[0-9]+'); then set -- $output get_canonical_version $3 else --=20 2.47.0