Re: [OE-core] [PATCH v5 05/15] kernel-yocto: Fix for buildpaths errors when rust is enabled for kernel

[Paul Barker <paul@pbarker.dev>]

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On Thu, 2026-01-29 at 08:39 -0800, Sadineni, Harish via
lists.openembedded.org wrote:
> From: Harish Sadineni <Harish.Sadineni@windriver.com>
> 
> Fixes for buildpaths errors after enabling rust for linux-kernel
> 
> Co-authored-by: El Mehdi YOUNES <elmehdi.younes@smile.fr>
> Signed-off-by: Harish Sadineni <Harish.Sadineni@windriver.com>

The commit message here should explain the introduction of KRUSTFLAGS.

> ---
>  meta/classes-recipe/kernel-yocto.bbclass | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/meta/classes-recipe/kernel-yocto.bbclass b/meta/classes-recipe/kernel-yocto.bbclass
> index 4323c4c80a..cd5daaf33b 100644
> --- a/meta/classes-recipe/kernel-yocto.bbclass
> +++ b/meta/classes-recipe/kernel-yocto.bbclass
> @@ -4,6 +4,8 @@
>  # SPDX-License-Identifier: MIT
>  #
>  
> +INHERIT:append = " ${@bb.utils.contains('DISTRO_FEATURES', 'rust-kernel', ' rust-common', '', d)}"
> +

We should be able to use inherit_defer here instead of modifying
INHERIT.

>  # remove tasks that modify the source tree in case externalsrc is inherited
>  SRCTREECOVEREDTASKS += "do_validate_branches do_kernel_configcheck do_kernel_checkout do_fetch do_unpack do_patch"
>  PATCH_GIT_USER_EMAIL ?= "kernel-yocto@oe"
> @@ -27,6 +29,11 @@ KMETA_AUDIT ?= "yes"
>  KMETA_AUDIT_WERROR ?= ""
>  KMETA_CONFIG_FEATURES ?= ""
>  
> +RUST_DEBUG_REMAP = "${@bb.utils.contains('DISTRO_FEATURES', 'rust-kernel', '--remap-path-prefix=${WORKDIR}=${TARGET_DBGSRC_DIR} \
> +                      --remap-path-prefix=${TMPDIR}/work-shared=${TARGET_DBGSRC_DIR}', '',d)}"
> +KRUSTFLAGS:append = " ${RUST_DEBUG_REMAP}"

Why do we use :append here?

> +EXTRA_OEMAKE:append = " ${@bb.utils.contains('DISTRO_FEATURES', 'rust-kernel', ' KRUSTFLAGS="${KRUSTFLAGS}"', '',d)}"
> +
>  # returns local (absolute) path names for all valid patches in the
>  # src_uri
>  def find_patches(d,subdir):

Best regards,

-- 
Paul Barker


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