From: Nick Desaulniers <ndesaulniers@google.com>
To: Wedson Almeida Filho <wedsonaf@google.com>
Cc: Miguel Ojeda <ojeda@kernel.org>,
Masahiro Yamada <masahiroy@kernel.org>,
linux-kbuild@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
rust-for-linux@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, Alex Gaynor <alex.gaynor@gmail.com>,
Finn Behrens <me@kloenk.de>,
Adam Bratschi-Kaye <ark.email@gmail.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Sven Van Asbroeck <thesven73@gmail.com>,
Gary Guo <gary@garyguo.net>,
Boris-Chengbiao Zhou <bobo1239@web.de>,
Boqun Feng <boqun.feng@gmail.com>,
Douglas Su <d0u9.su@outlook.com>,
Dariusz Sosnowski <dsosnowski@dsosnowski.pl>,
Antonio Terceiro <antonio.terceiro@linaro.org>,
Daniel Xu <dxu@dxuuu.xyz>
Subject: Re: [PATCH 15/19] Kbuild: add Rust support
Date: Tue, 7 Dec 2021 16:05:33 -0800 [thread overview]
Message-ID: <CAKwvOdk2Z2-GQZ3rxHzdYQGVw2G-w0BmbiwDb_PCDzQaw6MdXw@mail.gmail.com> (raw)
In-Reply-To: <CAMKQLNJKumnucRHttHFN0cMK_g6kCJ7o0ev_3_RJsmPqbjo08g@mail.gmail.com>
On Tue, Dec 7, 2021 at 3:25 PM Wedson Almeida Filho <wedsonaf@google.com> wrote:
>
> On Tue, 7 Dec 2021 at 23:21, Nick Desaulniers <ndesaulniers@google.com> wrote:
> >
> > On Tue, Dec 7, 2021 at 2:45 PM Nick Desaulniers <ndesaulniers@google.com> wrote:
> > >
> > > On Mon, Dec 6, 2021 at 6:07 AM Miguel Ojeda <ojeda@kernel.org> wrote:
> > > >
> > >
> > > ... snip ...
> > >
> > > Miguel and team,
> > > I'm happy to see progress here! Just some quick notes after a first pass.
> > >
> > > Testing this series applied on mainline, I see:
> > > $ make LLVM=1 -j72 defconfig
> > > $ grep RUST .config
> > > CONFIG_HAS_RUST=y
> > > CONFIG_RUSTC_VERSION=14000
> > > # CONFIG_RUST is not set
> > > ...
> > > $ make LLVM=1 -j72 menuconfig
> > > # enable CONFIG_RUST
> > > $ make LLVM=1
> > > ...
> > > CALL scripts/checksyscalls.sh
> > > error: @path is unstable - use -Z unstable-options to enable its use
> > >
> > > error: @path is unstable - use -Z unstable-options to enable its use
> > > $ rustc --version
> > > rustc 1.40.0 (73528e339 2019-12-16)
> > >
> > > Can we update some Kconfig checks to fix that?
> >
> > After now reading though the Documentation/ patch:
> >
> > $ rustup update
> > $ rustc --version
> > rustc 1.57.0 (f1edd0429 2021-11-29)
> > $ make LLVM=1 -j72
> > ...
> > make[1]: *** No rule to make target
> > '/usr/local/google/home/ndesaulniers/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/lib.rs',
> > needed by 'rust/core.o'. Stop.
>
> Can you run `rustup component add rust-src`?
>
> When we change the compiler version, we need to install the source
> code for `core` for the new version. (We'll update the documentation
> to reflect that.)
Cool, yeah please add that to the docs. Kconfig checks should be
added to make this idiot-proof; starting from everything uninstalled,
I should be able to read the Kconfig dependencies in `make menuconfig`
to understand what I'm missing. And if I'm missing anything, I
shouldn't be able to select CONFIG_RUST.
I get slightly further now.
$ make LLVM=1 -j72
...
BINDGEN rust/bindings_helpers_generated.rs
thread 'main' panicked at 'called `Result::unwrap()` on an `Err`
value: "could not run executable `/android0/llvm-project/clang`:
Permission denied (os error 13)"',
/usr/local/google/home/ndesaulniers/.cargo/registry/src/github.com-1ecc6299db9ec823/clang-sys-1.3.0/src/support.rs:196:58
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
thread 'main' panicked at 'called `Result::unwrap()` on an `Err`
value: "could not run executable `/android0/llvm-project/clang`:
Permission denied (os error 13)"',
/usr/local/google/home/ndesaulniers/.cargo/registry/src/github.com-1ecc6299db9ec823/clang-sys-1.3.0/src/support.rs:196:58
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
make[1]: *** [rust/Makefile:261: rust/bindings_helpers_generated.rs] Error 1
make[1]: *** Deleting file 'rust/bindings_helpers_generated.rs'
make[1]: *** Waiting for unfinished jobs....
make[1]: *** [rust/Makefile:248: rust/bindings_generated.rs] Error 1
make[1]: *** Deleting file 'rust/bindings_generated.rs'
make: *** [Makefile:1271: prepare0] Error 2
It looks like bindgen found part of the path to llvm-project that I
have checked out to disk for when I do development on LLVM for work.
So this might only be an issue if folks have a copy of clang built
from source in their $PATH?
$ which clang
/android0/llvm-project/llvm/build/bin/clang
Looking at the output of `make LLVM=1 -j72 V=1`, I see two invocations
of bindgen, and can repro if I just run the full command manually.
I don't see my path to my source code checkout of llvm-project in the
command line invocation of bindgen; this might be an issue itself with
bindgen.
Googling for "could not run executable" and bindgen, I find this
thread with a similar failure string:
https://bugzilla.mozilla.org/show_bug.cgi?id=1363655
No hits in their issue tracker: https://github.com/rust-lang/rust-bindgen.
$ bindgen --version
bindgen 0.59.2
$ cargo install --locked --version 0.56.0 bindgen
$ bindgen --version
bindgen 0.56.0
$ make LLVM=1 -j72
# produces the same error.
I guess the error is coming not from bindgen, but a dependency of its;
"clang-sys?"
https://github.com/KyleMayes/clang-sys/blob/master/src/support.rs
I've filed an issue in
https://github.com/KyleMayes/clang-sys/issues/138; let's follow up
there?
--
Thanks,
~Nick Desaulniers
next prev parent reply other threads:[~2021-12-08 0:05 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-06 14:02 [PATCH 00/19] Rust support Miguel Ojeda
2021-12-06 14:02 ` [PATCH 01/19] kallsyms: support "big" kernel symbols Miguel Ojeda
2021-12-06 14:18 ` Matthew Wilcox
2021-12-06 17:00 ` Miguel Ojeda
2021-12-06 14:02 ` [PATCH 02/19] kallsyms: increase maximum kernel symbol length to 512 Miguel Ojeda
2021-12-06 14:02 ` [PATCH 03/19] kallsyms: use the correct buffer size for symbols Miguel Ojeda
2021-12-06 14:02 ` [PATCH 04/19] rust: add C helpers Miguel Ojeda
2021-12-06 14:02 ` [PATCH 05/19] rust: add `compiler_builtins` crate Miguel Ojeda
2021-12-07 23:01 ` Nick Desaulniers
2021-12-09 19:34 ` Miguel Ojeda
2021-12-06 14:03 ` [PATCH 07/19] rust: add `build_error` crate Miguel Ojeda
2021-12-06 14:03 ` [PATCH 08/19] rust: add `macros` crate Miguel Ojeda
2021-12-06 14:03 ` [PATCH 10/19] rust: export generated symbols Miguel Ojeda
2021-12-06 14:03 ` [PATCH 11/19] vsprintf: add new `%pA` format specifier Miguel Ojeda
2021-12-06 15:02 ` Greg Kroah-Hartman
2021-12-06 15:56 ` Miguel Ojeda
2021-12-06 16:02 ` Greg Kroah-Hartman
2021-12-06 19:52 ` Nick Desaulniers
2021-12-06 19:55 ` Matthew Wilcox
2021-12-06 20:02 ` Nick Desaulniers
2021-12-06 14:03 ` [PATCH 12/19] scripts: add `generate_rust_analyzer.py` Miguel Ojeda
2021-12-06 14:03 ` [PATCH 13/19] scripts: decode_stacktrace: demangle Rust symbols Miguel Ojeda
2021-12-06 14:03 ` [PATCH 14/19] docs: add Rust documentation Miguel Ojeda
2021-12-08 1:29 ` Nick Desaulniers
2021-12-08 23:07 ` Miguel Ojeda
2021-12-06 14:03 ` [PATCH 15/19] Kbuild: add Rust support Miguel Ojeda
2021-12-07 22:45 ` Nick Desaulniers
2021-12-07 23:21 ` Nick Desaulniers
2021-12-07 23:25 ` Wedson Almeida Filho
2021-12-08 0:05 ` Nick Desaulniers [this message]
2021-12-08 22:52 ` Miguel Ojeda
2021-12-11 15:53 ` Masahiro Yamada
2022-01-17 4:45 ` Miguel Ojeda
2021-12-06 14:03 ` [PATCH 16/19] samples: add Rust examples Miguel Ojeda
2021-12-06 14:03 ` [PATCH 17/19] MAINTAINERS: Rust Miguel Ojeda
2021-12-06 14:03 ` [RFC PATCH 18/19] drivers: gpio: PrimeCell PL061 in Rust Miguel Ojeda
[not found] ` <20211206140313.5653-20-ojeda@kernel.org>
2021-12-06 15:01 ` [RFC PATCH 19/19] drivers: android: Binder IPC " Greg Kroah-Hartman
2021-12-06 15:59 ` Wedson Almeida Filho
2021-12-06 16:02 ` Greg Kroah-Hartman
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