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From: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
To: Nick Desaulniers <ndesaulniers@google.com>
Cc: "Miguel Ojeda" <ojeda@kernel.org>,
	"Linus Torvalds" <torvalds@linux-foundation.org>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-fsdevel@vger.kernel.org, patches@lists.linux.dev,
	"Jarkko Sakkinen" <jarkko@kernel.org>,
	"Alex Gaynor" <alex.gaynor@gmail.com>,
	"Wedson Almeida Filho" <wedsonaf@google.com>,
	"Finn Behrens" <me@kloenk.de>, "Miguel Cano" <macanroj@gmail.com>,
	"Tiago Lam" <tiagolam@gmail.com>,
	"Boqun Feng" <boqun.feng@gmail.com>,
	"Gary Guo" <gary@garyguo.net>,
	"Björn Roy Baron" <bjorn3_gh@protonmail.com>
Subject: Re: [PATCH v9 20/27] scripts: add `rust_is_available.sh`
Date: Tue, 23 Aug 2022 14:12:31 +0200	[thread overview]
Message-ID: <CANiq72nA0WwfnSaNxxz27iM5LXPELQVzTAQGBE30SXeLGVEf1A@mail.gmail.com> (raw)
In-Reply-To: <CAKwvOdndYxQ+KgVhC8F3vWnHDT8pD3px8cKjinu-khn25_FSYw@mail.gmail.com>

On Mon, Aug 22, 2022 at 10:09 PM Nick Desaulniers
<ndesaulniers@google.com> wrote:
>
> because I'm using clang built from source from ToT.  Is this supposed
> to mean that I can't use clang-16, clang-14, clang-13, clang-12, or
> clang-11 (in the kernel we support clang-11+) in order to use rust?
> I'm guessing that's going to hinder adoption.  Is there a way to

No, it is only a warning, so you can proceed if you want to risk it.

However, is there a reason you would like to mix the versions?

If not, please point `bindgen` to your newer libclang (see below).

> specify which libclang version bindgen should be using?

Yes, see below.

> I have libclang built in my clang sources,
> llvm-project/llvm/build/lib/libclang.so.  I also tried:
>
> $ CLANG_PATH=/android0/llvm-project/llvm/build/lib/libclang.so.15 make
> LLVM=1 -j72 rustavailable

`CLANG_PATH` is for pointing to a `clang` executable, not `libclang`.

Instead, please try `LIBCLANG_PATH` (note the `LIB` there).

For instance, using the test header to print the libclang version,
this works for me:

    $ bindgen scripts/rust_is_available_bindgen_libclang.h
    ... clang version 14.0.6 (https://github.com/llvm/llvm-project.git ...

    $ LIBCLANG_PATH=.../libclang-6.0.so.1 \
      bindgen scripts/rust_is_available_bindgen_libclang.h
    ... clang version 6.0.0 (tags/RELEASE_600/final) ...

If the above does not work, for details on how the dependency is
resolved, please see:

    https://github.com/KyleMayes/clang-sys#linking
    https://github.com/KyleMayes/clang-sys#dependencies
    https://github.com/KyleMayes/clang-sys#environment-variables
    https://github.com/rust-lang/rust-bindgen#environment-variables

I will add a note about this to the docs.

Cheers,
Miguel

  reply	other threads:[~2022-08-23 14:50 UTC|newest]

Thread overview: 102+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-05 15:41 [PATCH v9 00/27] Rust support Miguel Ojeda
2022-08-05 15:41 ` [PATCH v9 01/27] kallsyms: use `sizeof` instead of hardcoded size Miguel Ojeda
2022-08-05 16:48   ` Geert Stappers
2022-08-05 18:46     ` Miguel Ojeda
2022-08-05 22:40   ` Konstantin Shelekhin
2022-08-17 19:36     ` Kees Cook
2022-08-18  9:03       ` Konstantin Shelekhin
2022-08-18 16:03         ` Kees Cook
2022-09-27 12:48           ` Miguel Ojeda
2022-08-05 15:41 ` [PATCH v9 02/27] kallsyms: avoid hardcoding buffer size Miguel Ojeda
2022-08-17 19:37   ` Kees Cook
2022-08-18 16:50     ` Geert Stappers
2022-08-05 15:41 ` [PATCH v9 03/27] kallsyms: add static relationship between `KSYM_NAME_LEN{,_BUFFER}` Miguel Ojeda
2022-08-17 19:39   ` Kees Cook
2022-08-17 19:50     ` Boqun Feng
2022-08-17 20:31       ` Kees Cook
2022-08-17 20:45         ` Miguel Ojeda
2022-08-05 15:41 ` [PATCH v9 04/27] kallsyms: support "big" kernel symbols Miguel Ojeda
2022-08-05 15:41 ` [PATCH v9 05/27] kallsyms: increase maximum kernel symbol length to 512 Miguel Ojeda
2022-08-05 15:41 ` [PATCH v9 06/27] rust: add C helpers Miguel Ojeda
2022-08-17 19:44   ` Kees Cook
2022-08-17 20:22     ` Miguel Ojeda
2022-08-17 20:34       ` Kees Cook
2022-08-17 21:44         ` Miguel Ojeda
2022-08-17 23:56           ` Kees Cook
2022-08-18 16:03             ` Miguel Ojeda
2022-08-18 16:08               ` Kees Cook
2022-08-18 17:01                 ` Miguel Ojeda
2022-08-05 15:41 ` [PATCH v9 08/27] rust: adapt `alloc` crate to the kernel Miguel Ojeda
2022-08-05 15:41 ` [PATCH v9 09/27] rust: add `compiler_builtins` crate Miguel Ojeda
2022-08-17 20:08   ` Kees Cook
2022-08-22 23:55   ` Nick Desaulniers
2022-08-24 18:38     ` Nick Desaulniers
2022-08-29 17:11       ` Gary Guo
2022-08-05 15:41 ` [PATCH v9 10/27] rust: add `macros` crate Miguel Ojeda
2022-08-05 15:41 ` [PATCH v9 11/27] rust: add `bindings` crate Miguel Ojeda
2022-08-05 15:41 ` [PATCH v9 12/27] rust: add `kernel` crate Miguel Ojeda
2022-08-06 10:24   ` Konstantin Shelekhin
2022-08-06 11:22     ` Miguel Ojeda
2022-08-06 12:15       ` Konstantin Shelekhin
2022-08-06 14:57       ` Matthew Wilcox
2022-09-19 14:07         ` Wedson Almeida Filho
2022-09-19 16:09           ` Linus Torvalds
2022-09-19 17:20             ` Linus Torvalds
2022-09-19 18:05               ` Wedson Almeida Filho
2022-09-19 20:42                 ` Linus Torvalds
2022-09-19 22:35                   ` Wedson Almeida Filho
2022-09-19 23:39                     ` Linus Torvalds
2022-09-19 23:50                       ` Alex Gaynor
2022-09-19 23:58                         ` Linus Torvalds
2022-09-20  0:15                           ` Linus Torvalds
2022-09-20 15:55                             ` Eric W. Biederman
2022-09-20 22:39                               ` Gary Guo
2022-09-21  6:42                                 ` comex
2022-09-21 14:19                                   ` Boqun Feng
2022-10-03  2:03                                     ` comex
2022-09-20  0:40                           ` Boqun Feng
2022-10-03  4:17                             ` Kyle Strand
2022-09-20  0:41                       ` Wedson Almeida Filho
2022-09-21 11:23       ` Konstantin Shelekhin
2022-09-21 11:46         ` Greg KH
2022-08-05 15:41 ` [PATCH v9 13/27] rust: export generated symbols Miguel Ojeda
2022-08-17 20:11   ` Kees Cook
2022-08-05 15:41 ` [PATCH v9 14/27] vsprintf: add new `%pA` format specifier Miguel Ojeda
2022-08-05 15:42 ` [PATCH v9 15/27] scripts: checkpatch: diagnose uses of `%pA` in the C side as errors Miguel Ojeda
2022-08-05 15:42 ` [PATCH v9 16/27] scripts: checkpatch: enable language-independent checks for Rust Miguel Ojeda
2022-08-17 20:12   ` Kees Cook
2022-08-05 15:42 ` [PATCH v9 17/27] scripts: decode_stacktrace: demangle Rust symbols Miguel Ojeda
2022-08-05 15:42 ` [PATCH v9 18/27] scripts: add `generate_rust_analyzer.py` Miguel Ojeda
2022-08-17 20:13   ` Kees Cook
2022-08-05 15:42 ` [PATCH v9 19/27] scripts: add `generate_rust_target.rs` Miguel Ojeda
2022-08-17 20:14   ` Kees Cook
2022-08-05 15:42 ` [PATCH v9 20/27] scripts: add `rust_is_available.sh` Miguel Ojeda
2022-08-17 20:18   ` Kees Cook
2022-08-17 20:40     ` Miguel Ojeda
2022-08-22 20:09   ` Nick Desaulniers
2022-08-23 12:12     ` Miguel Ojeda [this message]
2022-08-23 12:16       ` Miguel Ojeda
2022-08-05 15:42 ` [PATCH v9 21/27] scripts: add `is_rust_module.sh` Miguel Ojeda
2022-08-17 20:19   ` Kees Cook
2022-08-05 15:42 ` [PATCH v9 22/27] rust: add `.rustfmt.toml` Miguel Ojeda
2022-08-17 20:19   ` Kees Cook
2022-08-05 15:42 ` [PATCH v9 23/27] Kbuild: add Rust support Miguel Ojeda
2022-08-17 20:26   ` Kees Cook
2022-08-17 20:56     ` Miguel Ojeda
2022-08-22 22:35   ` Nick Desaulniers
2022-09-12 16:07   ` Masahiro Yamada
2022-09-12 16:18     ` Miguel Ojeda
2022-09-13  6:37       ` Masahiro Yamada
2022-08-05 15:42 ` [PATCH v9 24/27] docs: add Rust documentation Miguel Ojeda
2022-08-05 15:42 ` [PATCH v9 25/27] x86: enable initial Rust support Miguel Ojeda
2022-08-17 20:27   ` Kees Cook
2022-08-05 15:42 ` [PATCH v9 26/27] samples: add first Rust examples Miguel Ojeda
2022-08-06 13:14   ` Konstantin Shelekhin
2022-08-17 21:02     ` Miguel Ojeda
2022-08-18  9:04       ` Konstantin Shelekhin
2022-08-17 20:28   ` Kees Cook
2022-08-05 15:42 ` [PATCH v9 27/27] MAINTAINERS: Rust Miguel Ojeda
2022-08-17 20:28   ` Kees Cook
2022-08-17 20:43     ` Miguel Ojeda
     [not found] ` <20220805154231.31257-8-ojeda@kernel.org>
2022-08-17 20:07   ` [PATCH v9 07/27] rust: import upstream `alloc` crate Kees Cook
2022-08-17 21:00     ` Miguel Ojeda

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