Re: [OE-core] [PATCH] kernel-yocto-rust: Move rust kernel dependencies to bbclass

[Harish Sadineni <Harish.Sadineni@windriver.com>]

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On 3/18/2026 1:31 AM, Jose Quaresma wrote:
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> Sadineni, Harish via lists.openembedded.org 
> <https://urldefense.com/v3/__http://lists.openembedded.org__;!!AjveYdw8EvQ!b2ICl_fijVSH2wVxqIv7GAO9M7s8y2roM4-SddwJPX71oFS2SfJg3Nz-LU_TqwuhSgmRgNbFlqz30xa1maTf9B_kjeB1qQ$> 
> <Harish.Sadineni=windriver.com@lists.openembedded.org> escreveu 
> (terça, 17/03/2026 à(s) 18:08):
>
>     From: Harish Sadineni <Harish.Sadineni@windriver.com>
>
>     Move the rust kernel dpendencies from linux-yocto.inc
>     <https://urldefense.com/v3/__http://linux-yocto.inc__;!!AjveYdw8EvQ!b2ICl_fijVSH2wVxqIv7GAO9M7s8y2roM4-SddwJPX71oFS2SfJg3Nz-LU_TqwuhSgmRgNbFlqz30xa1maTf9B9txvlTIQ$>
>     to
>     kernel-yocto-rust.bbclass.
>
>     This centralizes Rust-specific configuration in the dedicated class,
>     which is intended to be inherited only when Rust kernel support is
>     enabled (e.g. via KERNEL_FEATURES).
>
>     Signed-off-by: Harish Sadineni <Harish.Sadineni@windriver.com>
>     ---
>      meta/classes-recipe/kernel-yocto-rust.bbclass | 2 ++
>      meta/recipes-kernel/linux/linux-yocto.inc
>     <https://urldefense.com/v3/__http://linux-yocto.inc__;!!AjveYdw8EvQ!b2ICl_fijVSH2wVxqIv7GAO9M7s8y2roM4-SddwJPX71oFS2SfJg3Nz-LU_TqwuhSgmRgNbFlqz30xa1maTf9B9txvlTIQ$> 
>        | 2 --
>      2 files changed, 2 insertions(+), 2 deletions(-)
>
>     diff --git a/meta/classes-recipe/kernel-yocto-rust.bbclass
>     b/meta/classes-recipe/kernel-yocto-rust.bbclass
>     index 608ccc4609..49f2bfc1ae 100644
>     --- a/meta/classes-recipe/kernel-yocto-rust.bbclass
>     +++ b/meta/classes-recipe/kernel-yocto-rust.bbclass
>     @@ -10,6 +10,8 @@ RUST_DEBUG_REMAP =
>     "--remap-path-prefix=${WORKDIR}=${TARGET_DBGSRC_DIR} \
>      KRUSTFLAGS = " ${RUST_DEBUG_REMAP}"
>      EXTRA_OEMAKE:append = " KRUSTFLAGS='${KRUSTFLAGS}'"
>
>     +RUST_KERNEL_DEPENDS ?= "clang-native rust-native bindgen-cli-native"
>     +DEPENDS += "${RUST_KERNEL_DEPENDS}"
>
>
> Any special reason to have this RUST_KERNEL_DEPENDS variable? It is 
> not used anywhere else.
> I wonder if just the DEPENDS could be used directly.

In earlier revisions, Bruce suggested keeping these dependencies in a 
variable assigned with ?=.
This approach makes it easier to customize them from bbappends and 
related use cases.

Thanks,
Harish

>
> Jose
>
>      RUST_KERNEL_TASK_DEPENDS ?= "rust-native:do_populate_sysroot
>     clang-native:do_populate_sysroot
>     bindgen-cli-native:do_populate_sysroot"
>      do_kernel_configme[depends] += "${RUST_KERNEL_TASK_DEPENDS}"
>
>     diff --git a/meta/recipes-kernel/linux/linux-yocto.inc
>     <https://urldefense.com/v3/__http://linux-yocto.inc__;!!AjveYdw8EvQ!b2ICl_fijVSH2wVxqIv7GAO9M7s8y2roM4-SddwJPX71oFS2SfJg3Nz-LU_TqwuhSgmRgNbFlqz30xa1maTf9B9txvlTIQ$>
>     b/meta/recipes-kernel/linux/linux-yocto.inc
>     <https://urldefense.com/v3/__http://linux-yocto.inc__;!!AjveYdw8EvQ!b2ICl_fijVSH2wVxqIv7GAO9M7s8y2roM4-SddwJPX71oFS2SfJg3Nz-LU_TqwuhSgmRgNbFlqz30xa1maTf9B9txvlTIQ$>
>     index f47873348a..4e230d405a 100644
>     --- a/meta/recipes-kernel/linux/linux-yocto.inc
>     <https://urldefense.com/v3/__http://linux-yocto.inc__;!!AjveYdw8EvQ!b2ICl_fijVSH2wVxqIv7GAO9M7s8y2roM4-SddwJPX71oFS2SfJg3Nz-LU_TqwuhSgmRgNbFlqz30xa1maTf9B9txvlTIQ$>
>     +++ b/meta/recipes-kernel/linux/linux-yocto.inc
>     <https://urldefense.com/v3/__http://linux-yocto.inc__;!!AjveYdw8EvQ!b2ICl_fijVSH2wVxqIv7GAO9M7s8y2roM4-SddwJPX71oFS2SfJg3Nz-LU_TqwuhSgmRgNbFlqz30xa1maTf9B9txvlTIQ$>
>     @@ -81,8 +81,6 @@ KERNEL_DEBUG ?= ""
>      DEPENDS += '${@bb.utils.contains_any("ARCH", [ "x86", "arm64",
>     "powerpc" ], "elfutils-native", "", d)}'
>      DEPENDS += "openssl-native util-linux-native"
>      DEPENDS += "gmp-native libmpc-native"
>     -RUST_KERNEL_DEPENDS ?= "${@bb.utils.contains('KERNEL_FEATURES',
>     'rust', 'clang-native rust-native bindgen-cli-native', '', d)}"
>     -DEPENDS += "${RUST_KERNEL_DEPENDS}"
>
>      # Some options depend on CONFIG_PAHOLE_VERSION, so need to make
>     pahole-native available before do_kernel_configme
>      do_kernel_configme[depends] +=
>     '${@bb.utils.contains("KERNEL_DEBUG", "True",
>     "pahole-native:do_populate_sysroot", "", d)}'
>     -- 
>     2.49.0
>
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> -- 
> Best regards,
>
> José Quaresma

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