Re: [OE-core] [PATCH v2 1/4] clang/llvm: Upgrade to 22.x major release

["Mathieu Dubois-Briand" <mathieu.dubois-briand@bootlin.com>]

On Thu Mar 26, 2026 at 3:09 AM CET, Khem Raj via lists.openembedded.org wrote:
> From: Khem Raj <raj.khem@gmail.com>
>
> Includes support for new Intel (Wildcat Lake, Nova Lake with APX and AVX10.2)
> Arm (C1 Nano, Pro, Premium, Ultra) processors. It also features performance
> optimizations for AMD Zen 4 and Zen 5 architectures.
>
> Integrated Distributed ThinLTO is more mature, with enhancements
> like cache support for incremental builds and robust handling of temporary artifacts.
>
> LLDB added first-class WebAssembly debugging support, including breakpoints and variable inspection.
>
> Support for Google Native Client (NaCl) is dropped in this release.
>
> Detailed ChangeLog [1]
>
> [1] https://releases.llvm.org/22.1.0/docs/ReleaseNotes.html
>
> Signed-off-by: Khem Raj <raj.khem@gmail.com>
> ---

Hi Khem,

Thanks for the new version. I believe we have two issues linked with
this patch.


Firs, an x86 build issue:

ERROR: clang-22.1.1-r0 do_compile: Execution of '/srv/pokybuild/yocto-worker/qemux86-world-alt/build/build/tmp/work/x86-64-v3-poky-linux/clang/22.1.1/temp/run.do_compile.91398' failed with exit code 1
...
| Run Build Command(s): ninja -v -j 16 all
| ninja: error: '/srv/pokybuild/yocto-worker/qemux86-world-alt/build/build/tmp/work-shared/llvm-project-source-22.1.1-r0/sources/llvm-project-22.1.1.src/clang/tools/scan-build-py/lib64/libscanbuild/__init__.py', needed by 'lib64/libscanbuild/__init__.py', missing and no known rule to make it
|

https://autobuilder.yoctoproject.org/valkyrie/#/builders/17/builds/3302
https://autobuilder.yoctoproject.org/valkyrie/#/builders/59/builds/3478

Then, a rust selftest issue:

2026-03-26 11:11:17,872 - oe-selftest - INFO - rust.RustSelfTestSystemEmulated.test_rust (subunit.RemotedTestCase)
2026-03-26 11:11:17,889 - oe-selftest - INFO -  ... FAIL
...
test [assembly] tests/assembly-llvm/asm/loongarch-type.rs#loongarch32 ... FAILED
...

failures:

---- [assembly] tests/assembly-llvm/asm/loongarch-type.rs#loongarch32 stdout ----
------FileCheck stdout------------------------------

------FileCheck stderr------------------------------
/srv/pokybuild/yocto-worker/qemuarm64-tc/build/build-st-2170811/tmp/work/cortexa57-poky-linux/rust/1.94.0/sources/rustc-1.94.0-src/tests/assembly-llvm/asm/loongarch-type.rs:31:11: error: CHECK: expected string not found in input
// CHECK: pcalau12i $t0, %got_pc_hi20(extern_func)
          ^
/srv/pokybuild/yocto-worker/qemuarm64-tc/build/build-st-2170811/tmp/work/cortexa57-poky-linux/rust/1.94.0/sources/rustc-1.94.0-src/build/x86_64-unknown-linux-gnu/test/assembly-llvm/asm/loongarch-type.loongarch32/loongarch-type.s:9:6: note: scanning from here
 #APP
     ^
...

https://autobuilder.yoctoproject.org/valkyrie/#/builders/5/builds/3413
https://autobuilder.yoctoproject.org/valkyrie/#/builders/58/builds/1289
https://autobuilder.yoctoproject.org/valkyrie/#/builders/42/builds/3411

Can you have a look at the issue?

Thanks,
Mathieu

-- 
Mathieu Dubois-Briand, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com