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]> > <[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]> > <[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)}" > <$%[email protected]('KERNEL_RUST_SUPPORT','True','clang-nativerust-nativebindgen-cli-native','',d)%7D> > +DEPENDS += "${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) Bruce > The implementation of KERNEL_RUST_SUPPORT is problematic as it only > works for the value of "True", not "true", or "1" or 1 or any other > thing people might dream up. "Contains" isn't really an appropriate > mechanism for a boolean either. > > You can use bb.utils.to_boolean() as a way to better obtain a boolean > value from a random variable. > > Understood, Earlier i took reference from the code that already present in > that file. > I have updated the code we will send v8. > > Thanks, > Harish > > Cheers, > > Richard > > > > > > > -- - Thou shalt not follow the NULL pointer, for chaos and madness await thee at its end - "Use the force Harry" - Gandalf, Star Trek II
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