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

Message ID 20260706112905.41381-2-Harish.Sadineni@windriver.com
State New
Headers show
Series [1/4] kernel-arch: Add clang toolchain support | expand

Commit Message

Harish Sadineni July 6, 2026, 11:29 a.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

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..ee0d5abaeb 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', '', d)}"