On Tue, 2026-06-23 at 23:42 -0700, Hemanth Kumar M D via lists.openembedded.org wrote: > From: Hemanth Kumar M D <[email protected]> > > Cargo walks from CWD up to the filesystem root merging every > .cargo/config.toml it finds. Any such file above TOPDIR is silently > picked up and can override Yocto's linker, registry or compiler > settings, leading to build failures. > > Until cargo provides a proper fix upstream, add a warning so users > get a clear diagnostic instead of a build error. > > Upstream meta-issue: https://github.com/rust-lang/cargo/issues/9769 > > [YOCTO #15637] > > Signed-off-by: Hemanth Kumar M D <[email protected]> > --- > meta/classes-global/sanity.bbclass | 33 ++++++++++++++++++++++++++++++ > 1 file changed, 33 insertions(+) > > diff --git a/meta/classes-global/sanity.bbclass > b/meta/classes-global/sanity.bbclass > index bdfa7f059d..c67c7b8f03 100644 > --- a/meta/classes-global/sanity.bbclass > +++ b/meta/classes-global/sanity.bbclass > @@ -854,6 +854,38 @@ def sanity_check_locale(d): > except locale.Error: > raise_sanity_error("Your system needs to support the en_US.UTF-8 > locale.", d) > > +def check_cargo_config(d): > + # Cargo merges .cargo/config.toml from every directory between CWD and > + # the filesystem root. Warn for anything found in ancestor directories > + # above TOPDIR that Cargo would pick up silently. > + import os > + > + topdir = d.getVar('TOPDIR')
TMPDIR and each package's WORKDIR are under TOPDIR by default, but this
can be overridden. Perhaps we should be checking ancestors of
BASE_WORKDIR instead.
> + ancestor = os.path.dirname(topdir)
> + found = []
> + last_ancestor = None
> + while True:
> + for name in ('config.toml', 'config'):
> + cfg = os.path.join(ancestor, '.cargo', name)
> + if os.path.exists(cfg):
> + found.append(cfg)
> + last_ancestor = ancestor
> + break
This `break` should be dropped so that we tell the user about all
offending Cargo config files.
The rest of this patch LGTM, thanks!
Best regards,
--
Paul Barker
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