On Mon, 2026-03-09 at 14:01 -0400, Bruce Ashfield wrote: > > > > On Mon, Mar 9, 2026 at 12:54 PM Harish Sadineni > <[email protected]> wrote: > > > > > > > > > > > > On 3/9/2026 9:59 PM, Bruce Ashfield wrote: > > > > > > > > > > CAUTION: This email comes from a non Wind River email account! > > > Do not click links or open attachments unless you recognize the > > > sender and know the content is safe. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > On Mon, Mar 9, 2026 at 12:10 PM Harish Sadineni > > > <[email protected]> wrote: > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > On 3/9/2026 4:56 PM, Richard Purdie wrote: > > > > > > > > > > > > > > > > > > CAUTION: This email comes from a non Wind River email > > > > > account! > > > > > Do not click links or open attachments unless you recognize > > > > > the sender and know the content is safe. > > > > > > > > > > On Wed, 2026-03-04 at 09:43 -0800, Sadineni, Harish via > > > > > lists.openembedded.org wrote: > > > > > > > > > > > > > > > > > From: Harish Sadineni <[email protected]> > > > > > > > > > > > > Conditionally add 'clang-native', 'rust-native' and > > > > > > 'bindgen-cli-native' to 'DEPENDS' > > > > > > when Kernel Rust Support is enabled. > > > > > > > > > > > > These tools are required for building Rust-enabled kernels > > > > > > and for > > > > > > generating Rust FFI bindings via bindgen during the kernel > > > > > > build. > > > > > > > > > > > > This ensures the additional dependencies are only pulled in > > > > > > when > > > > > > Rust support is explicitly enabled, avoiding unnecessary > > > > > > native > > > > > > dependencies for non-Rust kernel builds. > > > > > > > > > > > > Signed-off-by: Harish Sadineni > > > > > > <[email protected]> > > > > > > --- > > > > > > meta/recipes-kernel/linux/linux-yocto.inc | 3 +++ > > > > > > 1 file changed, 3 insertions(+) > > > > > > > > > > > > diff --git a/meta/recipes-kernel/linux/linux-yocto.inc > > > > > > b/meta/recipes-kernel/linux/linux-yocto.inc > > > > > > index 4d0a726bb6..b7961bbcdf 100644 > > > > > > --- a/meta/recipes-kernel/linux/linux-yocto.inc > > > > > > +++ b/meta/recipes-kernel/linux/linux-yocto.inc > > > > > > @@ -76,11 +76,14 @@ do_install:append(){ > > > > > > KERNEL_FEATURES:append:qemuall = " features/kernel- > > > > > > sample/kernel-sample.scc" > > > > > > > > > > > > KERNEL_DEBUG ?= "" > > > > > > +KERNEL_RUST_SUPPORT ?= "" > > > > > > # These used to be version specific, but are now common > > > > > > dependencies. New > > > > > > # tools / dependencies will continue to be added in > > > > > > version specific recipes. > > > > > > 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_RUST_SUPPORT', 'True', > > > > > > '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)}' > > > > > > > > > > > > > > > > I thought we were going to try and use KERNEL_FEATURES for > > > > > this? > > > > > > > > > Hi Richard, > > > > > > > > I have tried this but i got circular dependency error with > > > > KERNEL_FEATURES. So, I opted using variable > > > > KERNEL_RUST_SUPPORT. > > > > > > > > > > > > > > > > > > > > > > > > > > I'm curious about that. Can you share the details ? (diff and the > > > bitbake error) > > > > > > > > > > > > > > > > > > > > > > As discussed previously, I attempted to use the following in > > meta/recipes-kernel/linux/linux-yocto_6.18.bb: > > > > KERNEL_FEATURES:append = " ${@bb.utils.contains('KERNEL_FEATURES', > > 'rust-kernel', ' features/kernel-rust/kernel-rust.scc', '', d)}" > > > > This resulted in a BitBake variable dependency chain failure. The > > issue occurs because the expression is trying to read > > KERNEL_FEATURES > > while simultaneously modifying KERNEL_FEATURES, which creates a > > circular dependency. > > > > > Yes, that's clearly not going to work, but that wouldn't have been > the suggestion. > > Wasn't Richard asking about setting the RUST_KERNEL_DEPENDS based on > the KERNEL_FEATURES containing rust.scc ?
Yes, along with maybe with a tweak to the KERNEL_FEATURES code which could expand " rust " or maybe " kernel-rust "in KERNEL_FEATURES into "features/kernel-rust/kernel-rust.scc" too just so there was a nice short cut for it? Cheers, Richard
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