Re: [OE-core] [PATCH v2 2/3] rust: refactor source handling into a shared work-shared recipe

["Mathieu Dubois-Briand" <mathieu.dubois-briand@bootlin.com>]

On Wed Jul 22, 2026 at 8:17 AM CEST, Deepesh via lists.openembedded.org Varatharajan wrote:
> From: Deepesh Varatharajan <Deepesh.Varatharajan@windriver.com>
>
> [YOCTO #15808]
>
> Consolidate Rust source management across all Rust recipes (rust, cargo,
> libstd-rs and their native/nativesdk variants) into a single shared
> source tree using the work-shared pattern.
>
> Disk savings: a world build with multilibs enabled, together with
> nativesdk-rust and nativesdk-cargo, now shares a single ~4.2 GB rustc-src
> tree instead of maintaining up to 11 independent copies (~46.2 GB total).
>

Hi Deepesh,

> --- /dev/null
> +++ b/meta/recipes-devtools/rust/rust-source.bb
> @@ -0,0 +1,56 @@
> +# rust-source.bb - Shared source recipe for the Rust toolchain
> +#
> +# This recipe fetches, unpacks, and patches the rustc source tree into a
> +# work-shared location so that rust, cargo, libstd-rs, and their native/nativesdk
> +# variants all share a single copy of the source. This eliminates duplication
> +# (up to 11 copies of the ~4.2 GB source tree in multilib + nativesdk builds)
> +# and significantly reduces disk usage (~46.2 GB -> ~4.2 GB for rustc-src).
> +#
> +# Only do_fetch, do_unpack, and do_patch are meaningful here. All other
> +# tasks are disabled since this recipe exists solely to provide sources.
> +
> +SUMMARY = "Rust compiler and runtime libaries"
> +HOMEPAGE = "http://www.rust-lang.org"
> +SECTION = "devel"
> +LICENSE = "(MIT | Apache-2.0) & Unicode-3.0"

Please use the new LICENSE syntax here...


> --- a/meta/recipes-devtools/rust/rust_1.96.1.bb
> +++ b/meta/recipes-devtools/rust/rust_git.bb
> @@ -4,6 +4,10 @@ SECTION = "devel"
>  LICENSE = "(MIT | Apache-2.0) & Unicode-3.0"

... and here.

Parsing recipes...WARNING: /srv/pokybuild/yocto-worker/beaglebone/build/layers/openembedded-core/meta/recipes-devtools/rust/rust-source.bb: rust-source-1.96.1: LICENSE is using an old syntax and should be upgraded to: "Unicode-3.0 AND (Apache-2.0 OR MIT)"

Thanks,
Mathieu

-- 
Mathieu Dubois-Briand, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com