re-enable gcc + rust builds [LWN.net]

From:		Asuna Yang
To:		Nathan Chancellor , Nicolas Schier , Miguel Ojeda , Boqun Feng , Gary Guo , Björn Roy Baron , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Nick Desaulniers , Bill Wendling , Justin Stitt , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Jonathan Corbet , Conor Dooley , Mingcong Bai , Han Gao , Vivian Wang , Jason Montleon
Subject:		[PATCH v6 0/4] RISC-V: re-enable gcc + rust builds
Date:		Tue, 30 Dec 2025 17:47:53 +0100
Message-ID:		<[email protected]>
Cc:		linux-kbuild-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org, rust-for-linux-AT-vger.kernel.org, llvm-AT-lists.linux.dev, linux-riscv-AT-lists.infradead.org, linux-doc-AT-vger.kernel.org, Asuna Yang
Archive-link:		Article

Previous v5 patch:
https://lore.kernel.org/20251204-gcc-rust-v5-v5-0-2d4f20d...

Changes in v6:
- Simplified `bindgen-backend-option` Kconfig function by using
`/dev/null` with clang option `-x c` instead of `touch`ing a new temp
file.
- Moved the `BINDGEN_TARGET` check to `rust/Makefile` so it only
performs the check when Rust is enabled, avoiding breaking targets that
do not support Rust builds.
- Updated my git email to the institutional email address.

Signed-off-by: Asuna Yang 
---
Asuna Yang (4):
      rust: export BINDGEN_TARGET from a separate Makefile
      rust: generate a fatal error if BINDGEN_TARGET is undefined
      rust: add a Kconfig function to test for support of bindgen options
      RISC-V: handle extension configs for bindgen, re-enable gcc + rust builds

 Documentation/rust/arch-support.rst |  2 +-
 Makefile                            |  3 ++-
 arch/riscv/Kconfig                  | 35 ++++++++++++++++++++++++++++++++++-
 rust/Makefile                       | 17 ++++++++---------
 scripts/Kconfig.include             |  5 +++++
 scripts/Makefile.rust               | 10 ++++++++++
 6 files changed, 60 insertions(+), 12 deletions(-)
---
base-commit: 8640b74557fc8b4c300030f6ccb8cd078f665ec8
change-id: 20251204-gcc-rust-v5-aafcede31ea3

Best regards,
-- 
Asuna Yang