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Date: Wed, 7 Sep 2022 03:08:36 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: Miguel Ojeda <ojeda@...nel.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
rust-for-linux@...r.kernel.org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Jarkko Sakkinen <jarkko@...nel.org>,
Alex Gaynor <alex.gaynor@...il.com>,
Finn Behrens <me@...enk.de>,
Adam Bratschi-Kaye <ark.email@...il.com>,
Wedson Almeida Filho <wedsonaf@...gle.com>,
Michael Ellerman <mpe@...erman.id.au>,
Sven Van Asbroeck <thesven73@...il.com>,
Gary Guo <gary@...yguo.net>,
Boris-Chengbiao Zhou <bobo1239@....de>,
Boqun Feng <boqun.feng@...il.com>,
Douglas Su <d0u9.su@...look.com>,
Dariusz Sosnowski <dsosnowski@...snowski.pl>,
Antonio Terceiro <antonio.terceiro@...aro.org>,
Daniel Xu <dxu@...uu.xyz>, Miguel Cano <macanroj@...il.com>,
David Gow <davidgow@...gle.com>,
Tiago Lam <tiagolam@...il.com>,
Björn Roy Baron <bjorn3_gh@...tonmail.com>,
Martin Rodriguez Reboredo <yakoyoku@...il.com>,
Michal Marek <michal.lkml@...kovi.net>,
Nick Desaulniers <ndesaulniers@...gle.com>,
Russell King <linux@...linux.org.uk>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will@...nel.org>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Paul Mackerras <paulus@...ba.org>,
Paul Walmsley <paul.walmsley@...ive.com>,
Palmer Dabbelt <palmer@...belt.com>,
Albert Ou <aou@...s.berkeley.edu>,
Richard Weinberger <richard@....at>,
Anton Ivanov <anton.ivanov@...bridgegreys.com>,
Johannes Berg <johannes@...solutions.net>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
Dave Hansen <dave.hansen@...ux.intel.com>,
X86 ML <x86@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
"open list:SIFIVE DRIVERS" <linux-riscv@...ts.infradead.org>,
linux-um@...ts.infradead.org
Subject: Re: [PATCH v8 27/31] Kbuild: add Rust support
On Tue, Aug 2, 2022 at 10:53 AM Miguel Ojeda <ojeda@...nel.org> wrote:
>
> Having all the new files in place, we now enable Rust support
> in the build system, including `Kconfig` entries related to Rust,
> the Rust configuration printer, the target specification
> generation script, the version detection script and a few
> other bits.
>
> Co-developed-by: Alex Gaynor <alex.gaynor@...il.com>
> Signed-off-by: Alex Gaynor <alex.gaynor@...il.com>
> Co-developed-by: Finn Behrens <me@...enk.de>
> Signed-off-by: Finn Behrens <me@...enk.de>
> Co-developed-by: Adam Bratschi-Kaye <ark.email@...il.com>
> Signed-off-by: Adam Bratschi-Kaye <ark.email@...il.com>
> Co-developed-by: Wedson Almeida Filho <wedsonaf@...gle.com>
> Signed-off-by: Wedson Almeida Filho <wedsonaf@...gle.com>
> Co-developed-by: Michael Ellerman <mpe@...erman.id.au>
> Signed-off-by: Michael Ellerman <mpe@...erman.id.au>
> Co-developed-by: Sven Van Asbroeck <thesven73@...il.com>
> Signed-off-by: Sven Van Asbroeck <thesven73@...il.com>
> Co-developed-by: Gary Guo <gary@...yguo.net>
> Signed-off-by: Gary Guo <gary@...yguo.net>
> Co-developed-by: Boris-Chengbiao Zhou <bobo1239@....de>
> Signed-off-by: Boris-Chengbiao Zhou <bobo1239@....de>
> Co-developed-by: Boqun Feng <boqun.feng@...il.com>
> Signed-off-by: Boqun Feng <boqun.feng@...il.com>
> Co-developed-by: Douglas Su <d0u9.su@...look.com>
> Signed-off-by: Douglas Su <d0u9.su@...look.com>
> Co-developed-by: Dariusz Sosnowski <dsosnowski@...snowski.pl>
> Signed-off-by: Dariusz Sosnowski <dsosnowski@...snowski.pl>
> Co-developed-by: Antonio Terceiro <antonio.terceiro@...aro.org>
> Signed-off-by: Antonio Terceiro <antonio.terceiro@...aro.org>
> Co-developed-by: Daniel Xu <dxu@...uu.xyz>
> Signed-off-by: Daniel Xu <dxu@...uu.xyz>
> Co-developed-by: Miguel Cano <macanroj@...il.com>
> Signed-off-by: Miguel Cano <macanroj@...il.com>
> Co-developed-by: David Gow <davidgow@...gle.com>
> Signed-off-by: David Gow <davidgow@...gle.com>
> Co-developed-by: Tiago Lam <tiagolam@...il.com>
> Signed-off-by: Tiago Lam <tiagolam@...il.com>
> Co-developed-by: Björn Roy Baron <bjorn3_gh@...tonmail.com>
> Signed-off-by: Björn Roy Baron <bjorn3_gh@...tonmail.com>
> Co-developed-by: Martin Rodriguez Reboredo <yakoyoku@...il.com>
> Signed-off-by: Martin Rodriguez Reboredo <yakoyoku@...il.com>
> Signed-off-by: Miguel Ojeda <ojeda@...nel.org>
> ---
> .gitignore | 6 +
> .rustfmt.toml | 12 +
> Makefile | 172 +++++++-
> arch/Kconfig | 6 +
> arch/arm/Kconfig | 1 +
> arch/arm64/Kconfig | 1 +
> arch/powerpc/Kconfig | 1 +
> arch/riscv/Kconfig | 1 +
> arch/riscv/Makefile | 5 +
> arch/um/Kconfig | 1 +
> arch/x86/Kconfig | 1 +
> arch/x86/Makefile | 10 +
> include/linux/compiler_types.h | 6 +-
> init/Kconfig | 46 +-
> lib/Kconfig.debug | 82 ++++
> rust/.gitignore | 10 +
> rust/Makefile | 415 +++++++++++++++++++
> rust/bindgen_parameters | 21 +
> scripts/.gitignore | 1 +
> scripts/Kconfig.include | 6 +-
> scripts/Makefile | 3 +
> scripts/Makefile.build | 60 +++
> scripts/Makefile.debug | 10 +
> scripts/Makefile.host | 34 +-
> scripts/Makefile.lib | 12 +
> scripts/Makefile.modfinal | 8 +-
> scripts/cc-version.sh | 12 +-
> scripts/generate_rust_target.rs | 232 +++++++++++
> scripts/is_rust_module.sh | 16 +
> scripts/kconfig/confdata.c | 75 ++++
> scripts/min-tool-version.sh | 6 +
> scripts/rust-is-available-bindgen-libclang.h | 2 +
> scripts/rust-is-available.sh | 160 +++++++
> 33 files changed, 1408 insertions(+), 26 deletions(-)
> create mode 100644 .rustfmt.toml
> create mode 100644 rust/.gitignore
> create mode 100644 rust/Makefile
> create mode 100644 rust/bindgen_parameters
> create mode 100644 scripts/generate_rust_target.rs
> create mode 100755 scripts/is_rust_module.sh
> create mode 100644 scripts/rust-is-available-bindgen-libclang.h
> create mode 100755 scripts/rust-is-available.sh
>
> @@ -151,7 +162,8 @@ config WERROR
> default COMPILE_TEST
> help
> A kernel build should not cause any compiler warnings, and this
> - enables the '-Werror' flag to enforce that rule by default.
> + enables the '-Werror' (for C) and '-Dwarnings' (for Rust) flags
> + to enforce that rule by default.
>
> However, if you have a new (or very old) compiler with odd and
> unusual warnings, or you have some architecture with problems,
> @@ -1898,6 +1910,38 @@ config PROFILING
> Say Y here to enable the extended profiling support mechanisms used
> by profilers.
>
> +config RUST
> + bool "Rust support"
> + depends on HAVE_RUST
> + depends on RUST_IS_AVAILABLE
> + depends on !MODVERSIONS
> + depends on !GCC_PLUGINS
> + depends on !RANDSTRUCT
> + depends on !DEBUG_INFO_BTF
> + select CONSTRUCTORS
> + help
> + Enables Rust support in the kernel.
> +
> + This allows other Rust-related options, like drivers written in Rust,
> + to be selected.
> +
> + It is also required to be able to load external kernel modules
> + written in Rust.
> +
> + See Documentation/rust/ for more information.
> +
> + If unsure, say N.
> +
> +config RUSTC_VERSION_TEXT
> + string
> + depends on RUST
> + default $(shell,command -v $(RUSTC) >/dev/null 2>&1 && $(RUSTC) --version || echo n)
> +
> +config BINDGEN_VERSION_TEXT
> + string
> + depends on RUST
> + default $(shell,command -v $(BINDGEN) >/dev/null 2>&1 && $(BINDGEN) --version || echo n)
> +
Where are these config options used?
I grep'ed but no hit.
masahiro@zoe:~/ref/linux-next$ git grep RUSTC_VERSION_TEXT
init/Kconfig:config RUSTC_VERSION_TEXT
masahiro@zoe:~/ref/linux-next$ git grep BINDGEN_VERSION_TEXT
init/Kconfig:config BINDGEN_VERSION_TEXT
> --
> 2.37.1
>
--
Best Regards
Masahiro Yamada
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