On Fri, 2025-11-21 at 11:51 +0100, Gyorgy Sarvari via lists.openembedded.org 
wrote:
> On 11/21/25 10:17, Mathieu Dubois-Briand wrote:
> > On Thu Nov 20, 2025 at 1:19 PM CET, Gyorgy Sarvari via 
> > lists.openembedded.org wrote:
> > > This patch is a workaround for 
> > > https://bugzilla.yoctoproject.org/show_bug.cgi?id=15976
> > > 
> > > cc-rs crate is used by a number of projects, including rust's bootstrap 
> > > also
> > > to invoke the systems c/c++ compiler.
> > > 
> > > A few updates ago it has changed the way CFLAGS/CXXFLAGS are handled: it 
> > > now
> > > merges them with HOST_C*FLAGS and TARGET_C*FLAGS.
> > > 
> > > This is a problem when a recipe is cross compiled, but it has a build 
> > > dependency
> > > which uses this crate to be built. In this case the C*FLAGS variable 
> > > contains
> > > target flags, while the HOST_C*FLAGS contains host-specific flags, and 
> > > when the
> > > two are mixed, the output is not what one expects.
> > > 
> > > This change tries to filter out the incorrect flags:
> > > - If the wrapper is invoked as a c or c++ compiler wrapper,
> > > - then determines if it compiles for host or for target
> > > - Depending on the on above, it considers the TARGET_*FLAGS or HOST*FLAGS
> > >   correct, and the C*FLAGS variable content incorrect.
> > > - It subtracts the correct set from the incorrect set, and drops the
> > >   remainder from the compiler flags. (Which might be often an empty list, 
> > > so
> > >   the flags are frequently unchanged)
> > > 
> > > Signed-off-by: Gyorgy Sarvari <[email protected]>
> > > ---
> > Hi Gyorgy,
> > 
> > Thanks for your patch.
> > 
> > I suspect one of the commit of this series is responsible of this rust
> > test failure:
> > 
> > 2025-11-20 21:59:48,098 - oe-selftest - INFO - FAIL: 
> > rust.RustSelfTestSystemEmulated.test_rust (subunit.RemotedTestCase)
> > ...
> >   File 
> > "/srv/pokybuild/yocto-worker/qemux86-64-tc/build/layers/openembedded-core/meta/lib/oeqa/core/decorator/__init__.py",
> >  line 35, in wrapped_f
> >     return func(*args, **kwargs)
> >   File 
> > "/srv/pokybuild/yocto-worker/qemux86-64-tc/build/layers/openembedded-core/meta/lib/oeqa/selftest/cases/rust.py",
> >  line 131, in test_rust
> >     retval = runCmd(cmd)
> >   File 
> > "/srv/pokybuild/yocto-worker/qemux86-64-tc/build/layers/openembedded-core/meta/lib/oeqa/utils/commands.py",
> >  line 214, in runCmd
> >     raise AssertionError("Command '%s' returned non-zero exit status 
> > %d:\n%s" % (command, result.status, exc_output))
> > AssertionError: Command 'export TARGET_VENDOR="-poky"; export 
> > PATH=/srv/pokybuild/yocto-worker/qemux86-64-tc/build/build-st-1700604/tmp/work/x86-64-v3-poky-linux/rust/1.90.0/recipe-sysroot-native/usr/bin/python3-native:/srv/pokybuild/yocto-worker/qemux86-64-tc/build/build-st-1700604/tmp/work/x86-64-v3-poky-linux/rust/1.90.0/recipe-sysroot-native/usr/bin:/srv/pokybuild/yocto-worker/qemux86-64-tc/build/build-st-1700604/tmp/work/x86-64-v3-poky-linux/rust/1.90.0/recipe-sysroot-native/usr/bin/x86_64-poky-linux:/srv/pokybuild/yocto-worker/qemux86-64-tc/build/build-st-1700604/tmp/hosttools:$PATH;
> >  export 
> > RUST_TARGET_PATH=/srv/pokybuild/yocto-worker/qemux86-64-tc/build/build-st-1700604/tmp/work/x86-64-v3-poky-linux/rust/1.90.0/rust-targets;
> >  export RUSTFLAGS='-C strip=debuginfo'; export 
> > TEST_DEVICE_ADDR="192.168.7.6:12345"; cd 
> > /srv/pokybuild/yocto-worker/qemux86-64-tc/build/build-st-1700604/tmp/work/x86-64-v3-poky-linux/rust/1.90.0/sources/rustc-1.90.0-src;
> >  python3 src/bootstrap/bootstrap.py test  --exclude src/bootstrap  
> > --exclude src/doc/rustc  --exclude src/doc/rustdoc  --exclude 
> > src/doc/unstable-book  --exclude src/etc/test-float-parse  --exclude 
> > src/librustdoc  --exclude src/rustdoc-json-types  --exclude 
> > src/tools/coverage-dump  --exclude src/tools/jsondoclint  --exclude 
> > src/tools/lint-docs  --exclude src/tools/replace-version-placeholder  
> > --exclude src/tools/rust-analyzer  --exclude src/tools/rustdoc-themes  
> > --exclude src/tools/rust-installer  --exclude src/tools/test-float-parse  
> > --exclude src/tools/suggest-tests  --exclude src/tools/tidy  --exclude 
> > tests/assembly-llvm/asm/aarch64-outline-atomics.rs  --exclude 
> > tests/codegen-llvm/issues/issue-122805.rs  --exclude 
> > tests/codegen-llvm/thread-local.rs  --exclude tests/mir-opt/  --exclude 
> > tests/run-make  --exclude tests/run-make-fulldeps  --exclude tests/rustdoc  
> > --exclude tests/rustdoc-json  --exclude tests/rustdoc-js-std  --exclude 
> > tests/ui/abi/stack-probes-lto.rs  --exclude tests/ui/abi/stack-probes.rs  
> > --exclude tests/ui/codegen/mismatched-data-layouts.rs  --exclude 
> > tests/codegen-llvm/rust-abi-arch-specific-adjustment.rs  --exclude 
> > tests/ui/debuginfo/debuginfo-emit-llvm-ir-and-split-debuginfo.rs  --exclude 
> > tests/ui/feature-gates/version_check.rs  --exclude tests/ui-fulldeps/  
> > --exclude tests/ui/process/nofile-limit.rs  --exclude tidyselftest --no-doc 
> > --no-fail-fast --bless --target x86_64-poky-linux-gnu' returned non-zero 
> > exit status 1:
> > ...
> > 
> > https://autobuilder.yoctoproject.org/valkyrie/#/builders/66/builds/2691
> > 
> > Can you have a look at this error?
> 
> Yes, I did already:
> https://lists.openembedded.org/g/openembedded-core/message/226640 - I
> believe this should take care of this issue
> (but I have to admit that currently I struggle executing the selftest on
> my machine - both inside and outside of docker I get mysterious qemu
> startup errors).

I think I saw that issue in selftest with your patch applied.

I'm trying a simpler patch on master-next right now as a workaround.

Cheers,

Richard
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