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[v3,2/4] kernel-yocto-rust: use clang toolchain for riscv64 when Rust is enabled

Message ID 20260708151816.2115030-3-Harish.Sadineni@windriver.com
State Under Review
Headers show
Series Add Clang toolchain support for kernel builds | expand

Commit Message

Harish Sadineni July 8, 2026, 3:18 p.m. UTC 
From: Harish Sadineni <Harish.Sadineni@windriver.com>

Enable LLVM/Clang toolchain for riscv64 kernel builds when Rust support
is enabled, as Rust is only supported with LLVM toolchains for this
architecture.

This aligns with upstream kernel Rust architecture requirements as
documented in:
https://docs.kernel.org/rust/arch-support.html

Acked-by: Bruce Ashfield <bruce.ashfield@gmail.com>
Signed-off-by: Harish Sadineni <Harish.Sadineni@windriver.com>
---
 meta/recipes-kernel/linux/linux-yocto.inc | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/meta/recipes-kernel/linux/linux-yocto.inc b/meta/recipes-kernel/linux/linux-yocto.inc
index 4e230d405a..5d047b5f01 100644
--- a/meta/recipes-kernel/linux/linux-yocto.inc
+++ b/meta/recipes-kernel/linux/linux-yocto.inc
@@ -91,3 +91,7 @@  do_devshell:prepend() {
     d.setVar("HOSTPKG_CONFIG", "pkg-config-native")
     d.appendVar("OE_TERMINAL_EXPORTS", " HOSTPKG_CONFIG")
 }
+
+# For riscv64, Rust support in kernel only works with LLVM/Clang only.
+# https://docs.kernel.org/rust/arch-support.html
+TOOLCHAIN:riscv64 = "${@bb.utils.contains('KERNEL_FEATURES', 'rust', 'clang', 'gcc', d)}"