On 07-07-2026 01:07 pm, Mathieu Dubois-Briand wrote:
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On Mon Jul 6, 2026 at 1:29 PM CEST, Harish via lists.openembedded.org Sadineni
wrote:
From: Harish Sadineni<[email protected]>
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<[email protected]>
---
Hi Harish,
Thanks for your patch.
meta/recipes-kernel/linux/linux-yocto.inc | 4 ++++
1 file changed, 4 insertions(+)
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)}"
So I believe this is wrong, as you are setting TOOLCHAIN to nothing if
rust is not in KERNEL_FEATURES.
This is failing on the autobuilder with:
Parsing recipes...ERROR: ParseError at
/srv/pokybuild/yocto-worker/qemuriscv64/build/layers/openembedded-core/meta/classes-global/base.bbclass:36:
Could not inherit file classes/toolchain/.bbclass
ERROR: Parsing halted due to errors, see error messages above
https://autobuilder.yoctoproject.org/valkyrie/#/builders/45/builds/1836
Can you have a look at the issue?
Hi Mathieu,
Thanks for catching this and for sharing the autobuilder failure.
I will send a new version shortly.
Thanks,
Harish
Thanks,
Mathieu
--
Mathieu Dubois-Briand, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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