diff mbox series

[1/4] kernel-arch: Add clang toolchain support

Message ID 20260706112905.41381-1-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>

Convert the existing GCC tool definitions to use the `:toolchain-gcc`
override so they only apply when `TOOLCHAIN = "gcc"` (the default).

Introduce new definitions for `:toolchain-clang` that use clang,
ld.lld, llvm-ar, llvm-objcopy, and llvm-strip, allowing the kernel
to be built with the LLVM/Clang toolchain.

Signed-off-by: Harish Sadineni <Harish.Sadineni@windriver.com>
---
 meta/classes-recipe/kernel-arch.bbclass | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/meta/classes-recipe/kernel-arch.bbclass b/meta/classes-recipe/kernel-arch.bbclass
index 7aea9cd3e8..6ebc0f13ea 100644
--- a/meta/classes-recipe/kernel-arch.bbclass
+++ b/meta/classes-recipe/kernel-arch.bbclass
@@ -71,14 +71,25 @@  HOST_AR_KERNEL_ARCH ?= "${TARGET_AR_KERNEL_ARCH}"
 TARGET_OBJCOPY_KERNEL_ARCH ?= ""
 HOST_OBJCOPY_KERNEL_ARCH ?= "${TARGET_OBJCOPY_KERNEL_ARCH}"
 
-KERNEL_CC = "${CCACHE}${HOST_PREFIX}gcc ${HOST_CC_KERNEL_ARCH} \
+KERNEL_CC:toolchain-gcc = "${CCACHE}${HOST_PREFIX}gcc ${HOST_CC_KERNEL_ARCH} \
  -fuse-ld=bfd ${DEBUG_PREFIX_MAP} \
  -ffile-prefix-map=${STAGING_KERNEL_DIR}=${KERNEL_SRC_PATH} \
  -ffile-prefix-map=${STAGING_KERNEL_BUILDDIR}=${KERNEL_SRC_PATH} \
 "
-KERNEL_LD = "${HOST_PREFIX}ld.bfd ${HOST_LD_KERNEL_ARCH}"
-KERNEL_AR = "${HOST_PREFIX}ar ${HOST_AR_KERNEL_ARCH}"
-KERNEL_OBJCOPY = "${HOST_PREFIX}objcopy ${HOST_OBJCOPY_KERNEL_ARCH}"
+KERNEL_LD:toolchain-gcc = "${HOST_PREFIX}ld.bfd ${HOST_LD_KERNEL_ARCH}"
+KERNEL_AR:toolchain-gcc = "${HOST_PREFIX}ar ${HOST_AR_KERNEL_ARCH}"
+KERNEL_OBJCOPY:toolchain-gcc = "${HOST_PREFIX}objcopy ${HOST_OBJCOPY_KERNEL_ARCH}"
 # Code in package.py can't handle options on KERNEL_STRIP
-KERNEL_STRIP = "${HOST_PREFIX}strip"
+KERNEL_STRIP:toolchain-gcc = "${HOST_PREFIX}strip"
+
+
+KERNEL_CC:toolchain-clang = "${CCACHE}clang ${HOST_CC_KERNEL_ARCH} \
+ ${DEBUG_PREFIX_MAP} \
+ -ffile-prefix-map=${STAGING_KERNEL_DIR}=${KERNEL_SRC_PATH} \
+ -ffile-prefix-map=${STAGING_KERNEL_BUILDDIR}=${KERNEL_SRC_PATH} \
+"
+KERNEL_LD:toolchain-clang = "ld.lld ${HOST_LD_KERNEL_ARCH}"
+KERNEL_AR:toolchain-clang = "llvm-ar ${HOST_AR_KERNEL_ARCH}"
+KERNEL_OBJCOPY:toolchain-clang = "llvm-objcopy ${HOST_OBJCOPY_KERNEL_ARCH}"
+KERNEL_STRIP:toolchain-clang = "llvm-strip"
 TOOLCHAIN = "gcc"