On 26-06-2026 04:50 pm, Martin Hundebøll wrote:
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Hi Hemanth,
On Wed, 2026-06-24 at 23:52 -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 BASE_WORKDIR 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..5c5cf311da 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 BASE_WORKDIR that Cargo would pick up silently.
+ import os
+
+ base_workdir = d.getVar('BASE_WORKDIR')
+ ancestor = os.path.dirname(base_workdir)
+ found = []
+ last_ancestor = None
+ while True:
+ for name in ('config', 'config.toml'):
+ cfg = os.path.join(ancestor, '.cargo', name)
+ if os.path.exists(cfg):
+ found.append(cfg)
+ last_ancestor = ancestor
+ break
+ parent = os.path.dirname(ancestor)
+ if parent == ancestor:
+ break
+ ancestor = parent
This can easier be implemented using pathlib.Path:
from pathlib import Path
base_workdir = Path(d.getVar('BASE_WORKDIR'))
for path in base_workdir.parents:
for config in (".cargo/config", ".cargo/config.toml"):
if path.joinpath(config).exists():
found.append(path / config)
// Martin
Hi Martin ,
Thanks for the suggestion , addressed in v3 :
https://lists.openembedded.org/g/openembedded-core/topic/patch_v3_sanity_bbclass/120043231
+
+ if found:
+ bb.warn("Cargo config file(s) found at %s which is/are
outside the build "
+ "directory. Cargo will silently apply their settings
during the "
+ "rust/cargo build and can override Yocto's settings
like linker, "
+ "registry or compiler settings causing build
failures. You can "
+ "either remove these file(s) or move your build
directory outside "
+ "of %s to fix this. "
+ "See
https://bugzilla.yoctoproject.org/show_bug.cgi?id=15637 for more
details."
+ % (', '.join(found), last_ancestor))
+
def check_sanity_everybuild(status, d):
import os, stat
# Sanity tests which test the users environment so need to run
at each build (or are so cheap
@@ -873,6 +905,7 @@ def check_sanity_everybuild(status, d):
status.addresult('Bitbake version %s is required and version
%s was found\n' % (minversion, bb.__version__))
sanity_check_locale(d)
+ check_cargo_config(d)
paths = d.getVar('PATH').split(":")
if "." in paths or "./" in paths or "" in paths:
--
2.49.0
--
Regards,
Hemanth Kumar M D
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