diff mbox series

[RFC,v2,5/8] kernel-yocto: add rust support via make rustavailable in do_kernel_configme

Message ID 20251105130942.833204-6-Harish.Sadineni@windriver.com
State New
Headers show
Series Enable rust support for linux kernel | expand

Commit Message

Harish Sadineni Nov. 5, 2025, 1:09 p.m. UTC 
From: Harish Sadineni <Harish.Sadineni@windriver.com>

To enable Rust integration in the Linux kernel build, this patch:

- Adds `rust-native`, `clang-native` and `bindgen-cli-native` to `do_kernel_configme[depends]`
  to ensure required tools are available for Rust support.
- Invokes `make rustavailable` inside `do_kernel_configme()` to prepare
  the kernel for building Rust-based modules or core components.

The `make rustavailable` target requires the Rust standard library sources to be
present under `${STAGING_DIR_NATIVE}/usr/lib/rustlib/src/rust`, which is handled
in the `rust` recipe via shared staging.

Signed-off-by: Harish Sadineni <Harish.Sadineni@windriver.com>
---
 meta/classes-recipe/kernel-yocto.bbclass | 9 +++++++++
 1 file changed, 9 insertions(+)

Comments

Bruce Ashfield Nov. 5, 2025, 1:34 p.m. UTC | #1 
On Wed, Nov 5, 2025 at 8:10 AM <Harish.Sadineni@windriver.com> wrote:

> From: Harish Sadineni <Harish.Sadineni@windriver.com>
>
> To enable Rust integration in the Linux kernel build, this patch:
>
> - Adds `rust-native`, `clang-native` and `bindgen-cli-native` to
> `do_kernel_configme[depends]`
>   to ensure required tools are available for Rust support.
> - Invokes `make rustavailable` inside `do_kernel_configme()` to prepare
>   the kernel for building Rust-based modules or core components.
>
> The `make rustavailable` target requires the Rust standard library sources
> to be
> present under `${STAGING_DIR_NATIVE}/usr/lib/rustlib/src/rust`, which is
> handled
> in the `rust` recipe via shared staging.
>
> Signed-off-by: Harish Sadineni <Harish.Sadineni@windriver.com>
> ---
>  meta/classes-recipe/kernel-yocto.bbclass | 9 +++++++++
>  1 file changed, 9 insertions(+)
>
> diff --git a/meta/classes-recipe/kernel-yocto.bbclass
> b/meta/classes-recipe/kernel-yocto.bbclass
> index e53bf15194..7a115bdffd 100644
> --- a/meta/classes-recipe/kernel-yocto.bbclass
> +++ b/meta/classes-recipe/kernel-yocto.bbclass
> @@ -463,6 +463,10 @@ do_kernel_configme[depends] +=
> "virtual/cross-binutils:do_populate_sysroot"
>  do_kernel_configme[depends] += "virtual/cross-cc:do_populate_sysroot"
>  do_kernel_configme[depends] += "bc-native:do_populate_sysroot
> bison-native:do_populate_sysroot"
>  do_kernel_configme[depends] += "kern-tools-native:do_populate_sysroot"
> +do_kernel_configme[depends] += "${@bb.utils.contains('DISTRO_FEATURES',
> 'rust-kernel', \
> +                                'rust-native:do_populate_sysroot \
> +                                 clang-native:do_populate_sysroot \
> +                                 bindgen-cli-native:do_populate_sysroot',
> '', d)}"
>
for consistency (with the other rust changes), these could be assigned to a
variable first (?=) and then assigned. That allows them to be tweaked more
easily while the support is being developed.

Bruce



>  do_kernel_configme[dirs] += "${S} ${B}"
>  do_kernel_configme() {
>         do_kernel_metadata config
> @@ -507,6 +511,11 @@ do_kernel_configme() {
>                 echo "CONFIG_LOCALVERSION="\"${LINUX_VERSION_EXTENSION}\"
> >> ${B}/.config
>         fi
>  }
> +do_kernel_configme:append() {
> +    if ${@bb.utils.contains('DISTRO_FEATURES', 'rust-kernel', 'true',
> 'false', d)}; then
> +        oe_runmake -C ${S} O=${B} rustavailable
> +    fi
> +}
>
>  addtask kernel_configme before do_configure after do_patch
>  addtask config_analysis
> --
> 2.49.0
>
>
Yoann Congal Nov. 6, 2025, 8:52 p.m. UTC | #2 
Le 05/11/2025 à 14:09, Sadineni, Harish via lists.openembedded.org a écrit :
> From: Harish Sadineni <Harish.Sadineni@windriver.com>
> 
> To enable Rust integration in the Linux kernel build, this patch:
> 
> - Adds `rust-native`, `clang-native` and `bindgen-cli-native` to `do_kernel_configme[depends]`
>   to ensure required tools are available for Rust support.
> - Invokes `make rustavailable` inside `do_kernel_configme()` to prepare
>   the kernel for building Rust-based modules or core components.
> 
> The `make rustavailable` target requires the Rust standard library sources to be
> present under `${STAGING_DIR_NATIVE}/usr/lib/rustlib/src/rust`, which is handled
> in the `rust` recipe via shared staging.
> 
> Signed-off-by: Harish Sadineni <Harish.Sadineni@windriver.com>
> ---
>  meta/classes-recipe/kernel-yocto.bbclass | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/meta/classes-recipe/kernel-yocto.bbclass b/meta/classes-recipe/kernel-yocto.bbclass
> index e53bf15194..7a115bdffd 100644
> --- a/meta/classes-recipe/kernel-yocto.bbclass
> +++ b/meta/classes-recipe/kernel-yocto.bbclass
> @@ -463,6 +463,10 @@ do_kernel_configme[depends] += "virtual/cross-binutils:do_populate_sysroot"
>  do_kernel_configme[depends] += "virtual/cross-cc:do_populate_sysroot"
>  do_kernel_configme[depends] += "bc-native:do_populate_sysroot bison-native:do_populate_sysroot"
>  do_kernel_configme[depends] += "kern-tools-native:do_populate_sysroot"
> +do_kernel_configme[depends] += "${@bb.utils.contains('DISTRO_FEATURES', 'rust-kernel', \
> +                                'rust-native:do_populate_sysroot \
> +                                 clang-native:do_populate_sysroot \
> +                                 bindgen-cli-native:do_populate_sysroot', '', d)}"
>  do_kernel_configme[dirs] += "${S} ${B}"
>  do_kernel_configme() {
>  	do_kernel_metadata config
> @@ -507,6 +511,11 @@ do_kernel_configme() {
>  		echo "CONFIG_LOCALVERSION="\"${LINUX_VERSION_EXTENSION}\" >> ${B}/.config
>  	fi
>  }
> +do_kernel_configme:append() {
> +    if ${@bb.utils.contains('DISTRO_FEATURES', 'rust-kernel', 'true', 'false', d)}; then
> +        oe_runmake -C ${S} O=${B} rustavailable
> +    fi

(same question as in a previous patch) Why not adding this code to
do_kernel_configme() defined just above?

> +}
>  
>  addtask kernel_configme before do_configure after do_patch
>  addtask config_analysis
> 
> 
> 
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diff mbox series

Patch

diff --git a/meta/classes-recipe/kernel-yocto.bbclass b/meta/classes-recipe/kernel-yocto.bbclass
index e53bf15194..7a115bdffd 100644
--- a/meta/classes-recipe/kernel-yocto.bbclass
+++ b/meta/classes-recipe/kernel-yocto.bbclass
@@ -463,6 +463,10 @@  do_kernel_configme[depends] += "virtual/cross-binutils:do_populate_sysroot"
 do_kernel_configme[depends] += "virtual/cross-cc:do_populate_sysroot"
 do_kernel_configme[depends] += "bc-native:do_populate_sysroot bison-native:do_populate_sysroot"
 do_kernel_configme[depends] += "kern-tools-native:do_populate_sysroot"
+do_kernel_configme[depends] += "${@bb.utils.contains('DISTRO_FEATURES', 'rust-kernel', \
+                                'rust-native:do_populate_sysroot \
+                                 clang-native:do_populate_sysroot \
+                                 bindgen-cli-native:do_populate_sysroot', '', d)}"
 do_kernel_configme[dirs] += "${S} ${B}"
 do_kernel_configme() {
 	do_kernel_metadata config
@@ -507,6 +511,11 @@  do_kernel_configme() {
 		echo "CONFIG_LOCALVERSION="\"${LINUX_VERSION_EXTENSION}\" >> ${B}/.config
 	fi
 }
+do_kernel_configme:append() {
+    if ${@bb.utils.contains('DISTRO_FEATURES', 'rust-kernel', 'true', 'false', d)}; then
+        oe_runmake -C ${S} O=${B} rustavailable
+    fi
+}
 
 addtask kernel_configme before do_configure after do_patch
 addtask config_analysis