[PATCH 0/3 v6] Oe-selftest for Clang, LLVM, LLD

[PATCH 0/3 v6] Oe-selftest for Clang, LLVM, LLD

[Deepesh.Varatharajan]

From: Deepesh Varatharajan <Deepesh.Varatharajan@windriver.com>

This patch series introduces a test framework to run selftests for
target builds of Clang, LLVM, and LLD.

v6 changes:
- Removed the workaround for the llvm-confid to fix Rust build failure
  as it is no longer required.
  https://git.openembedded.org/openembedded-core/commit/?id=8aace29b692a8f3902a675fb4c022c223ba49531
- Removed CLANG_ENABLE_TESTSUITE = "1" from the meta-selftest layer,
  as it caused the check-layer script to fail. Test suite enabling is
  now handled directly within the test suite script.
- x86-32 bit testing for llvm-module is no longer broken.

v5 changes:
- Fix intermittent failure seen for arm64.

v4 changes:
- Fix intermittent failures.

v3 changes:
- llvm_sysroot_preprocess_testsuite function needs be added to
  llvm:class-target not llvm:class-nativesdk.

v2 changes:
- Enable required CMake flags only when running the testsuite.
- Ensure default build time and package sizes remain unaffected.

Summary of changes:
-Patch 1: Disable clang-tools-extra tests, as Clang's CMake cannot
          detect the llvm-bcanalyzer target.
-Patch 2: Enabled the necessary CMake flags for clang, llvm & lld tests
          when CLANG_ENABLE_TESTSUITE is set to "1".
-Patch 3: Selftest script for Clang, LLVM, and LLD including exclude list

Testing:
1. The test suite has been successfully validated on x86-64, x86, arm64,
   riscv64 and arm32 for all Clang, LLD & LLVM components.
2. Clang, LLVM & LLD all together ~80K tests are there and we currently
   ~250 tests to exclude list which are failing (0.32%).

Impact on build time:
These builds were executed in a controlled environment without poky-sstate
enabled.

Default(without changes):
+-----------+------------+------------+------------+----------------+
|  Target   | Run 1      | Run 2      | Run 3      |    Average     |
| --------- | ---------- | ---------- | ---------- | -------------- |
|   llvm    | 22m18.441s | 22m31.905s | 22m23.718s |   22m24.688s   |
|   clang   | 30m09.774s | 30m22.680s | 30m15.312s |   30m15.922s   |
|   lld     | 1m26.994s  | 1m30.415s  | 1m29.006s  |   1m28.805s    |
+-----------+------------+------------+------------+----------------+

With the testsuite changes applied:
+-----------+------------+------------+------------+----------------+
|  Target   | Run 1      | Run 2      | Run 3      |    Average     |
| --------- | ---------- | ---------- | ---------- | -------------- |
|   llvm    | 23m32.104s | 23m45.887s | 23m38.157s |   23m38.716s   |
|   clang   | 30m31.402s | 30m46.198s | 30m39.445s |   30m39.015s   |
|   lld     | 1m29.845s  | 1m34.212s  | 1m31.925s  |   1m31.994s    |
+-----------+------------+------------+------------+----------------+

Comparison:
The additional overhead is minimal and primarily due to enabling
test-related build configurations.
+-----------+-------------+------------------+------------------+
|  Target   | Default Avg | With Changes Avg |     **Diff**     |
| --------- | ----------- | ---------------- | ---------------- |
|   llvm    | 22m24.688s  | 23m38.716s       |   +1m14.028s     |
|   clang   | 30m15.922s  | 30m39.015s       |   +0m23.093s     |
|   lld     | 1m28.805s   | 1m31.994s        |   +0m3.189s      |
+-----------+-------------+------------------+------------------+

Impact on package size and Fix:
The testsuite changes has a negative impact on certain package sizes,
as below:
+---------------------+----------+----------+-----------+------------+
| Package             | Old (MB) | New (MB) | Diff (MB) | Change (%) |
+=====================+==========+==========+===========+============+
| clang/clang-dbg     |    44.99 |    59.79 |    +14.81 |    +32.92% |
| clang/clang-dev     |    30.22 |    30.22 |     -0.00 |     -0.00% |
| clang/clang-tools   |     5.05 |    29.58 |    +24.53 |   +485.87% |
| llvm/llvm-bin       |    16.40 |    71.77 |    +55.36 |   +337.50% |
| llvm/llvm-dbg       |   386.79 |   646.12 |   +259.33 |    +67.05% |
| llvm/llvm-dev       |    32.67 |    33.67 |     +1.00 |     +3.05% |
| llvm/llvm-src       |   387.54 |   389.44 |     +1.90 |     +0.49% |
| llvm/llvm-staticdev |   609.68 |   616.80 |     +7.12 |     +1.17% |
+---------------------+----------+----------+-----------+------------+

FIX:
All testsuite-related changes are now gated by the CLANG_ENABLE_TESTSUITE
variable (default "0"), ensuring:
- Test-specific CMake flags are applied only during test execution.
- Standard builds remain fully unaffected in both build time and package size.

Deepesh Varatharajan (3):
  clang-tools-extra: disable tests
  clang: Enable cmake flags for llvm, clang, lld tests
  oeqa/selftest/clang: Add oe-selftests for Clang/LLVM/LLD test suites

 meta/lib/oeqa/selftest/cases/clang.py         | 330 ++++++++++++++++++
 .../0042-guard-clang-tools-extra-test.patch   |  74 ++++
 meta/recipes-devtools/clang/clang_git.bb      |   8 +
 meta/recipes-devtools/clang/common.inc        |   1 +
 meta/recipes-devtools/clang/lld_git.bb        |   5 +
 meta/recipes-devtools/clang/llvm_git.bb       |  18 +-
 6 files changed, 435 insertions(+), 1 deletion(-)
 create mode 100644 meta/lib/oeqa/selftest/cases/clang.py
 create mode 100644 meta/recipes-devtools/clang/clang/0042-guard-clang-tools-extra-test.patch

-- 
2.49.0

[PATCH 1/3] clang-tools-extra: disable tests

[Deepesh.Varatharajan]

From: Deepesh Varatharajan <Deepesh.Varatharajan@windriver.com>

clang-tools-extra tests depend on the llvm-bcanalyzer CMake target, which
exists in LLVM's CMake project but is not visible when Clang is built
separately. To run clang tests, disable clang-tools-extra tests for now.

Signed-off-by: Deepesh Varatharajan <Deepesh.Varatharajan@windriver.com>
---
 .../0042-guard-clang-tools-extra-test.patch   | 74 +++++++++++++++++++
 meta/recipes-devtools/clang/common.inc        |  1 +
 2 files changed, 75 insertions(+)
 create mode 100644 meta/recipes-devtools/clang/clang/0042-guard-clang-tools-extra-test.patch

diff --git a/meta/recipes-devtools/clang/clang/0042-guard-clang-tools-extra-test.patch b/meta/recipes-devtools/clang/clang/0042-guard-clang-tools-extra-test.patch
new file mode 100644
index 0000000000..9b4e29ff64
--- /dev/null
+++ b/meta/recipes-devtools/clang/clang/0042-guard-clang-tools-extra-test.patch
@@ -0,0 +1,74 @@
+clang-tools-extra tests depend on the llvm-bcanalyzer CMake target, which
+exists in LLVM's CMake project but is not visible when Clang is built
+separately. To run clang tests, disable clang-tools-extra tests for now.
+
+Without this patch when CLANG_INCLUDE_TESTS is ON got the following error
+
+--------------------------------------------------------------------------------
+| CMake Error at ../clang/21.1.8/recipe-sysroot/usr/lib/cmake/llvm/AddLLVM.cmake:2113 (add_dependencies):
+|   The dependency target "llvm-bcanalyzer" of target
+|   "check-clang-extra-clang-tidy-infrastructure-header-filter-from-config-file-simple"
+|   does not exist.
+| Call Stack (most recent call first):
+|   ../clang/21.1.8/recipe-sysroot/usr/lib/cmake/llvm/AddLLVM.cmake:2221 (add_lit_target)
+|   tools/extra/test/CMakeLists.txt:87 (add_lit_testsuites)
+|
+| CMake Error at ../clang/21.1.8/recipe-sysroot/usr/lib/cmake/llvm/AddLLVM.cmake:2113 (add_dependencies):
+|   The dependency target "llvm-bcanalyzer" of target
+|   "check-clang-extra-modularize" does not exist.
+| Call Stack (most recent call first):
+|   ../clang/21.1.8/recipe-sysroot/usr/lib/cmake/llvm/AddLLVM.cmake:2221 (add_lit_target)
+|   tools/extra/test/CMakeLists.txt:87 (add_lit_testsuites)
+-------------------------------------------------------------------------------
+
+Upstream-Status: Inappropriate [OE-Specific]
+Signed-off-by: Deepesh Varatharajan <Deepesh.Varatharajan@windriver.com>
+
+diff --git a/clang-tools-extra/CMakeLists.txt b/clang-tools-extra/CMakeLists.txt
+index 6b6f2b1..26e4c10 100644
+--- a/clang-tools-extra/CMakeLists.txt
++++ b/clang-tools-extra/CMakeLists.txt
+@@ -8,7 +8,7 @@ include(GNUInstallDirs)
+ option(CLANG_TIDY_ENABLE_QUERY_BASED_CUSTOM_CHECKS
+   "Enable query-based custom checks in clang-tidy" ON)
+
+-if(CLANG_INCLUDE_TESTS)
++if(CLANG_TOOLS_EXTRA_INCLUDE_TESTS)
+   umbrella_lit_testsuite_begin(check-clang-tools)
+
+   option(CLANG_TOOLS_TEST_USE_VG "Run Clang tools' tests under Valgrind" OFF)
+@@ -45,7 +45,7 @@ if (CLANG_ENABLE_CLANGD)
+ endif()
+
+ # Add the common testsuite after all the tools.
+-if(CLANG_INCLUDE_TESTS)
++if(CLANG_TOOLS_EXTRA_INCLUDE_TESTS)
+   add_subdirectory(test)
+   add_subdirectory(unittests)
+   umbrella_lit_testsuite_end(check-clang-tools)
+diff --git a/clang-tools-extra/include-cleaner/CMakeLists.txt b/clang-tools-extra/include-cleaner/CMakeLists.txt
+index dc147f9..4855577 100644
+--- a/clang-tools-extra/include-cleaner/CMakeLists.txt
++++ b/clang-tools-extra/include-cleaner/CMakeLists.txt
+@@ -1,7 +1,7 @@
+ include_directories(include)
+ add_subdirectory(lib)
+ add_subdirectory(tool)
+-if(CLANG_INCLUDE_TESTS)
++if(CLANG_TOOLS_EXTRA_INCLUDE_TESTS)
+   add_subdirectory(test)
+   add_subdirectory(unittests)
+ endif()
+diff --git a/clang-tools-extra/clangd/CMakeLists.txt b/clang-tools-extra/clangd/CMakeLists.txt
+index a1e9da4..94dcb96 100644
+--- a/clang-tools-extra/clangd/CMakeLists.txt
++++ b/clang-tools-extra/clangd/CMakeLists.txt
+@@ -215,7 +215,7 @@ endif()
+ option(CLANGD_BUILD_DEXP "Build the dexp tool as part of Clangd" ON)
+ llvm_canonicalize_cmake_booleans(CLANGD_BUILD_DEXP)
+
+-if(CLANG_INCLUDE_TESTS)
++if(CLANG_TOOLS_EXTRA_INCLUDE_TESTS)
+   add_subdirectory(test)
+   add_subdirectory(unittests)
+ endif()
diff --git a/meta/recipes-devtools/clang/common.inc b/meta/recipes-devtools/clang/common.inc
index 441ea099a9..d623990eca 100644
--- a/meta/recipes-devtools/clang/common.inc
+++ b/meta/recipes-devtools/clang/common.inc
@@ -60,6 +60,7 @@ SRC_URI = "\
     file://0039-Rename-UNUSED-and-UNKNOWN-elements-of-OffloadArch-enum.patch \
     file://0040-libcxxabi-declare-__gnu_unwind_frame-in-cxa_personal.patch \
     file://0041-Consolidate-and-fix-sysroot-based-compiler-rt-search.patch \
+    file://0042-guard-clang-tools-extra-test.patch \
 "
 # Fallback to no-PIE if not set
 GCCPIE ??= ""
-- 
2.49.0

[PATCH 2/3] clang: Enable cmake flags for llvm, clang, lld tests

[Deepesh.Varatharajan]

From: Deepesh Varatharajan <Deepesh.Varatharajan@windriver.com>

Enable the necessary CMake flags to build and run tests
for LLVM, Clang and LLD. Install the LLVM target tools
needed to run tests via llvm-lit inside QEMU only when
CLANG_ENABLE_TESTSUITE = "1".

Signed-off-by: Deepesh Varatharajan <Deepesh.Varatharajan@windriver.com>
---
 meta/recipes-devtools/clang/clang_git.bb |  8 ++++++++
 meta/recipes-devtools/clang/lld_git.bb   |  5 +++++
 meta/recipes-devtools/clang/llvm_git.bb  | 18 +++++++++++++++++-
 3 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/meta/recipes-devtools/clang/clang_git.bb b/meta/recipes-devtools/clang/clang_git.bb
index d55c59ffa0..a8c5e8cb2d 100644
--- a/meta/recipes-devtools/clang/clang_git.bb
+++ b/meta/recipes-devtools/clang/clang_git.bb
@@ -75,6 +75,14 @@ EXTRA_OECMAKE += "-DLLVM_ENABLE_ASSERTIONS=OFF \
                   -DCMAKE_STRIP=${STAGING_BINDIR_NATIVE}/llvm-strip \
 "
 
+CLANG_ENABLE_TESTSUITE ??= "0"
+CLANG_TESTSUITE_FLAGS = "\
+                  -DCLANG_INCLUDE_TESTS=ON \
+                  -DLLVM_INCLUDE_TESTS=ON \
+"
+
+EXTRA_OECMAKE:append:class-target = " ${@bb.utils.contains('CLANG_ENABLE_TESTSUITE', '1', d.getVar('CLANG_TESTSUITE_FLAGS'), '', d)}"
+
 DEPENDS = "llvm-tblgen-native llvm-native llvm binutils zlib zstd libffi libxml2 libxml2-native"
 DEPENDS:append:class-target = " ${@bb.utils.contains('TC_CXX_RUNTIME', 'llvm', 'compiler-rt libcxx', '', d)}"
 
diff --git a/meta/recipes-devtools/clang/lld_git.bb b/meta/recipes-devtools/clang/lld_git.bb
index ba36942790..8960cac2d3 100644
--- a/meta/recipes-devtools/clang/lld_git.bb
+++ b/meta/recipes-devtools/clang/lld_git.bb
@@ -19,4 +19,9 @@ OECMAKE_SOURCEPATH = "${S}/lld"
 EXTRA_OECMAKE += "-DLLVM_INCLUDE_TESTS=OFF -DLLVM_USE_SYMLINKS=ON \
                   -DLLVM_TABLEGEN_EXE=${STAGING_BINDIR_NATIVE}/llvm-tblgen"
 
+CLANG_ENABLE_TESTSUITE ??= "0"
+LLD_TESTSUITE_FLAGS = "-DLLVM_INCLUDE_TESTS=ON"
+
+EXTRA_OECMAKE:append:class-target = " ${@bb.utils.contains('CLANG_ENABLE_TESTSUITE', '1', d.getVar('LLD_TESTSUITE_FLAGS'), '', d)}"
+
 BBCLASSEXTEND = "native nativesdk"
diff --git a/meta/recipes-devtools/clang/llvm_git.bb b/meta/recipes-devtools/clang/llvm_git.bb
index 96ea383731..e7823154b9 100644
--- a/meta/recipes-devtools/clang/llvm_git.bb
+++ b/meta/recipes-devtools/clang/llvm_git.bb
@@ -80,6 +80,18 @@ PACKAGECONFIG[opt-viewer] = "-DLLVM_TOOL_OPT_VIEWER_BUILD=ON,-DLLVM_TOOL_OPT_VIE
 PACKAGECONFIG[lto] = "-DLLVM_ENABLE_LTO=Full -DLLVM_BINUTILS_INCDIR=${STAGING_INCDIR},,binutils,"
 PACKAGECONFIG[thin-lto] = "-DLLVM_ENABLE_LTO=Thin -DLLVM_BINUTILS_INCDIR=${STAGING_INCDIR},,binutils,"
 
+CLANG_ENABLE_TESTSUITE ??= "0"
+LLVM_TESTSUITE_FLAGS = "\
+                  -DLLVM_BUILD_TESTS=ON \
+                  -DLLVM_INSTALL_GTEST=ON \
+                  -DLLVM_INCLUDE_TESTS=ON \
+                  -DLLVM_TOOL_LLVM_EXEGESIS_BUILD=ON \
+                  -DLLVM_TOOL_OBJ2YAML_BUILD=ON \
+                  -DLLVM_TOOL_YAML2OBJ_BUILD=ON \
+                 "
+
+EXTRA_OECMAKE:append:class-target = " ${@bb.utils.contains('CLANG_ENABLE_TESTSUITE', '1', d.getVar('LLVM_TESTSUITE_FLAGS'), '', d) } "
+
 # LLVM debug symbols are very large (several gigabytes), reduce the debug level
 # so they're just hundreds of megabytes.
 DEBUG_LEVELFLAG = "-g1"
@@ -118,7 +130,7 @@ do_install:append:class-native() {
     rm ${D}${bindir}/*-tblgen
 }
 
-SYSROOT_PREPROCESS_FUNCS:append:class-target = " llvm_sysroot_preprocess"
+SYSROOT_PREPROCESS_FUNCS:append:class-target = " llvm_sysroot_preprocess ${@bb.utils.contains('CLANG_ENABLE_TESTSUITE', '1', 'llvm_sysroot_preprocess_testsuite', '', d) }"
 SYSROOT_PREPROCESS_FUNCS:append:class-nativesdk = " llvm_sysroot_preprocess"
 
 llvm_sysroot_preprocess() {
@@ -126,6 +138,10 @@ llvm_sysroot_preprocess() {
         install -m 0755 ${S}/llvm/tools/llvm-config/llvm-config ${SYSROOT_DESTDIR}${bindir_crossscripts}/
 }
 
+llvm_sysroot_preprocess_testsuite() {
+        install -m 0755 ${B}/bin/* ${SYSROOT_DESTDIR}${bindir}/
+}
+
 FILES:${PN}-dev += "${libdir}/llvm-config"
 
 BBCLASSEXTEND = "native nativesdk"
-- 
2.49.0

[PATCH 3/3] oeqa/selftest/clang: Add oe-selftests for Clang/LLVM/LLD test suites

[Deepesh.Varatharajan]

From: Deepesh Varatharajan <Deepesh.Varatharajan@windriver.com>

Add three selftest classes (LLVMSelfTestSystemEmulated,
ClangSelfTestSystemEmulated, LLDSelfTestSystemEmulated) that run
the upstream LLVM, Clang, and LLD regression test suites on target
using llvm-lit inside QEMU.

Each test:
  - Automatically sets CLANG_ENABLE_TESTSUITE = "1" to enable
    testsuite CMake flags and target tool installation
  - Builds core-image-minimal with Python3 and LLVM dependencies
  - Boots QEMU with 8GB RAM / 4 CPUs (3GB for 32-bit ARM)
  - NFS-mounts the host TMPDIR into the guest to access build
    artifacts (lit configs, test inputs, and target tools)
  - Runs llvm-lit with filters to exclude tests for non-target
    architectures and unsupported OS platforms
  - Excludes known-failing tests specific to each component

Signed-off-by: Deepesh Varatharajan <Deepesh.Varatharajan@windriver.com>
---
 meta/lib/oeqa/selftest/cases/clang.py | 330 ++++++++++++++++++++++++++
 1 file changed, 330 insertions(+)
 create mode 100644 meta/lib/oeqa/selftest/cases/clang.py

diff --git a/meta/lib/oeqa/selftest/cases/clang.py b/meta/lib/oeqa/selftest/cases/clang.py
new file mode 100644
index 0000000000..5defde3f60
--- /dev/null
+++ b/meta/lib/oeqa/selftest/cases/clang.py
@@ -0,0 +1,330 @@
+#
+# Copyright (c) 2026 by Wind River Systems, Inc.
+#
+# SPDX-License-Identifier: MIT
+#
+import contextlib
+from oeqa.core.decorator import OETestTag
+from oeqa.selftest.case import OESelftestTestCase
+from oeqa.utils.commands import bitbake, get_bb_var, runqemu
+from oeqa.utils.nfs import unfs_server
+
+class ClangFamilyBase(OESelftestTestCase):
+
+    ALL_ARCHS = [
+        "aarch64", "arm", "i386", "x86_64", "x86",
+        "mips", "riscv", "riscv64", "ppc", "ppc64",
+        "hexagon", "sparc", "sparcv9", "msp430",
+        "loongarch"
+    ]
+
+    EXCLUDE_OS = [
+        "Mac", "macho", "Darwin", "OSX", "wasm",
+        "Windows", "Win", "MinGW", "COFF", "zos",
+        "FreeBSD", "aix", "fuchsia", "ve"
+    ]
+
+    DEFAULT_PACKAGES = [
+        "libgcc",
+        "libstdc++",
+        "llvm",
+        "python3",
+        "python3-core",
+        "python3-modules",
+        "nfs-utils",
+    ]
+
+    def setUp(self):
+        super().setUp()
+        self.write_config('CLANG_ENABLE_TESTSUITE = "1"')
+        self.target_arch = get_bb_var("TARGET_ARCH")
+        self.tmpdir = get_bb_var("TMPDIR")
+        arches = [a for a in self.ALL_ARCHS if a != self.target_arch]
+        self.filter_out = "|".join(arches + self.EXCLUDE_OS)
+
+    def build_core_image(self):
+        features = [
+            'CLANG_ENABLE_TESTSUITE = "1"',
+            'IMAGE_FEATURES += "ssh-server-openssh"',
+            'CORE_IMAGE_EXTRA_INSTALL += "{}"'.format(" ".join(self.DEFAULT_PACKAGES))
+        ]
+        self.write_config("\n".join(features))
+        bitbake("core-image-minimal")
+
+    def start_qemu_nfs(self):
+        ctx = contextlib.ExitStack()
+        s = ctx.__enter__()
+        nfsport, mountport = s.enter_context(unfs_server(self.tmpdir, udp=False))
+
+        # 32-bit ARM can only address up to ~3GB
+        if self.target_arch == "arm":
+            qemu_mem = 3072
+        else:
+            qemu_mem = 8192
+
+        qemu = s.enter_context(
+            runqemu("core-image-minimal", runqemuparams="nographic",
+                    qemuparams=f"-m {qemu_mem} -smp 4")
+        )
+
+        status, _ = qemu.run("uname")
+        if status != 0:
+            raise AssertionError("QEMU SSH check failed")
+
+        status, _ = qemu.run(f"mkdir -p {self.tmpdir}")
+        if status != 0:
+            raise AssertionError("Failed to create TMPDIR on target")
+
+        mountcmd = (
+            f"mount -o nfsvers=3,local_lock=all,port={nfsport},mountport={mountport} "
+            f"\"{qemu.server_ip}:{self.tmpdir}\" \"{self.tmpdir}\""
+        )
+        status, output = qemu.run(mountcmd)
+        if status != 0:
+            raise AssertionError(f"NFS mount failed: {output}")
+        return ctx, qemu
+
+    def run_llvm_lit(self, recipe, extra_filter=None):
+        build_dir = get_bb_var("B", recipe)
+        workdir = get_bb_var("WORKDIR", recipe)
+        guest_result = f"/tmp/{recipe}-target-results.json"
+        host_result = f"{workdir}/{recipe}-target-results.log"
+
+        filter_regex = self.filter_out
+        if extra_filter:
+            filter_regex += "|" + "|".join(extra_filter)
+
+        cmd = (
+             f"cd {build_dir}/bin && "
+             f"python3 ./llvm-lit -j 4 --filter-out '{filter_regex}' ../test -o {guest_result}"
+        )
+
+        return cmd, guest_result, host_result
+
+@OETestTag("toolchain-system")
+@OETestTag("toolchain-user")
+@OETestTag("runqemu")
+class LLVMSelfTestSystemEmulated(ClangFamilyBase):
+
+    LLVM_EXTRA_EXCLUDE = [
+        "BugPoint/compile-custom\\.ll$",
+        "BugPoint/replace-funcs-with-null\\.ll$",
+        "CodeGen/AMDGPU/lds-run-twice-absolute-md\\.ll$",
+        "CodeGen/AMDGPU/lds-run-twice\\.ll$",
+        "CodeGen/Generic/fp128-math-libcalls\\.ll$",
+        "CodeGen/Thumb/2009-08-20-ISelBug\\.ll$",
+        "CodeGen/Thumb/2010-07-15-debugOrdering\\.ll$",
+        "CodeGen/Thumb/2014-06-10-thumb1-ldst-opt-bug\\.ll$",
+        "CodeGen/Thumb/PR17309\\.ll$",
+        "CodeGen/Thumb/dyn-stackalloc\\.ll$",
+        "CodeGen/Thumb/frame-access\\.ll$",
+        "CodeGen/Thumb/frame-chain\\.ll$",
+        "CodeGen/Thumb/ldm-merge-call\\.ll$",
+        "CodeGen/Thumb/pop\\.ll$",
+        "CodeGen/Thumb/pr35836\\.ll$",
+        "CodeGen/Thumb/pr35836_2\\.ll$",
+        "CodeGen/Thumb/scmp\\.ll$",
+        "CodeGen/Thumb/smul_fix\\.ll$",
+        "CodeGen/Thumb/stack-guard-xo\\.ll$",
+        "CodeGen/Thumb/stm-deprecated\\.ll$",
+        "CodeGen/Thumb/stm-merge\\.ll$",
+        "CodeGen/Thumb/thumb-ldm\\.ll$",
+        "CodeGen/Thumb/ucmp\\.ll$",
+        "CodeGen/Thumb/vargs\\.ll$",
+        "CodeGen/Thumb2/2009-08-21-PostRAKill4\\.ll$",
+        "CodeGen/Thumb2/2009-09-01-PostRAProlog\\.ll$",
+        "CodeGen/Thumb2/constant-islands\\.ll$",
+        "CodeGen/Thumb2/ldr-str-imm12\\.ll$",
+        "CodeGen/Thumb2/pacbti-m-varargs-1\\.ll$",
+        "CodeGen/Thumb2/pacbti-m-varargs-2\\.ll$",
+        "CodeGen/Thumb2/thumb2-ldm\\.ll$",
+        "ExecutionEngine/JITLink/Generic/llvm-jitlink-option-show-addrs\\.test$",
+        "ExecutionEngine/JITLink/Generic/sectcreate\\.test$",
+        "ExecutionEngine/MCJIT/.*",
+        "Other/spirv-sim/.*",
+        "Transforms/LoopLoadElim/.*",
+        "tools/llvm-cas/validation\\.test$",
+        "tools/llvm-cgdata/merge-combined-funcmap-hashtree\\.test$",
+        "tools/llvm-cgdata/merge-funcmap-concat\\.test$",
+        "tools/llvm-cgdata/merge-funcmap-double\\.test$",
+        "tools/llvm-cgdata/merge-funcmap-single\\.test$",
+        "tools/llvm-cgdata/merge-hashtree-concat\\.test$",
+        "tools/llvm-cgdata/merge-hashtree-double\\.test$",
+        "tools/llvm-cgdata/merge-hashtree-single\\.test$",
+        "tools/llvm-locstats/locstats\\.ll$",
+        "tools/llvm-locstats/no_scope_bytes\\.ll$",
+        "tools/llvm-objcopy/DXContainer/dump-section\\.yaml$",
+        "tools/llvm-objcopy/ELF/basic-binary-copy\\.test$",
+        "tools/llvm-objcopy/ELF/binary-first-seg-offset-zero\\.test$",
+        "tools/llvm-objcopy/ELF/binary-no-paddr\\.test$",
+        "tools/llvm-objcopy/ELF/binary-paddr\\.test$",
+        "tools/llvm-objcopy/ELF/binary-segment-layout\\.test$",
+        "tools/llvm-objcopy/ELF/check-addr-offset-align-binary\\.test$",
+        "tools/llvm-objcopy/ELF/dump-section\\.test$",
+        "tools/llvm-objcopy/ELF/gap-fill\\.test$",
+        "tools/llvm-objcopy/ELF/pad-to\\.test$",
+        "tools/llvm-objcopy/ELF/parent-loop-check\\.test$",
+        "tools/llvm-objcopy/ELF/strip-all-gnu\\.test$",
+        "tools/llvm-objcopy/ELF/strip-sections-keep\\.test$",
+        "tools/llvm-objcopy/ELF/strip-sections-only-section\\.test$",
+        "tools/llvm-objcopy/ELF/strip-sections\\.test$",
+        "tools/llvm-objcopy/ELF/update-section\\.test$",
+        "tools/llvm-original-di-preservation/acceptance-test\\.test$",
+        "tools/llvm-original-di-preservation/basic\\.test$",
+        "tools/llvm-reduce/temporary-files-as-bitcode-split\\.ll$",
+        "tools/not/disable-symbolization\\.test$",
+        "tools/opt-viewer/.*",
+        "tools/UpdateTestChecks/.*",
+        "tools/yaml2obj/ELF/custom-fill\\.yaml$",
+        "tools/yaml2obj/ELF/header-elfdatanone\\.yaml$",
+        "tools/yaml2obj/ELF/header-sh-fields\\.yaml$",
+        "tools/yaml2obj/GOFF/GOFF-header-end\\.yaml$",
+        "tools/yaml2obj/GOFF/GOFF-header-settings\\.yaml$",
+    ]
+
+    def test_llvm(self):
+        bitbake("llvm -c install")
+        self.build_core_image()
+        ctx, qemu = self.start_qemu_nfs()
+        with ctx:
+            cmd, guest_result, host_result = self.run_llvm_lit(
+                "llvm", extra_filter=self.LLVM_EXTRA_EXCLUDE
+            )
+            status, output = qemu.run(cmd, timeout=7200)
+            if status != 0:
+                raise AssertionError(f"llvm-lit failed for LLVM: {output}")
+            status, _ = qemu.run(f"cp {guest_result} {host_result}")
+            if status != 0:
+                raise AssertionError("Failed to copy LLVM lit results back to host")
+
+@OETestTag("toolchain-system")
+@OETestTag("toolchain-user")
+@OETestTag("runqemu")
+class ClangSelfTestSystemEmulated(ClangFamilyBase):
+
+    CLANG_EXTRA_EXCLUDE = [
+        "APINotes/yaml-roundtrip-2\\.test$",
+        "APINotes/yaml-roundtrip\\.test$",
+        "AST/ByteCode/builtin-bit-cast-long-double\\.cpp$",
+        "AST/ByteCode/builtin-bit-cast\\.cpp$",
+        "AST/ByteCode/builtin-functions\\.cpp$",
+        "AST/ByteCode/builtin-object-size\\.cpp$",
+        "AST/ByteCode/c\\.c$",
+        "AST/ByteCode/codegen\\.cpp$",
+        "AST/ByteCode/complex\\.c$",
+        "AST/ByteCode/complex\\.cpp$",
+        "AST/ByteCode/const-eval\\.c$",
+        "AST/ByteCode/const-fpfeatures\\.cpp$",
+        "AST/ByteCode/constexpr\\.c$",
+        "AST/ByteCode/cxx20\\.cpp$",
+        "AST/ByteCode/fixed-point\\.cpp$",
+        "AST/ByteCode/floats\\.cpp$",
+        "AST/ByteCode/functions\\.cpp$",
+        "AST/ByteCode/hlsl\\.hlsl$",
+        "AST/ByteCode/intap\\.cpp$",
+        "AST/ByteCode/invalid\\.cpp$",
+        "AST/ByteCode/lambda\\.cpp$",
+        "AST/ByteCode/literals\\.cpp$",
+        "AST/ByteCode/memberpointers\\.cpp$",
+        "AST/ByteCode/neon\\.c$",
+        "AST/ByteCode/new-delete\\.cpp$",
+        "AST/ByteCode/placement-new\\.cpp$",
+        "AST/ByteCode/records\\.cpp$",
+        "AST/ByteCode/spaceship\\.cpp$",
+        "AST/ByteCode/unions\\.cpp$",
+        "Analysis/dead-stores\\.c$",
+        "Analysis/exploded-graph-rewriter/.*",
+        "Analysis/scan-build/cxx-name\\.test$",
+        "Analysis/scan-build/deduplication\\.test$",
+        "Analysis/scan-build/exclude_directories\\.test$",
+        "Analysis/scan-build/help\\.test$",
+        "Analysis/scan-build/html_output\\.test$",
+        "Analysis/scan-build/plist_html_output\\.test$",
+        "Analysis/scan-build/plist_output\\.test$",
+        "Analysis/scan-build/rebuild_index/rebuild_index\\.test$",
+        "Analysis/scan-build/silence-core-checkers\\.test$",
+        "Analysis/virtualcall-fixits\\.cpp$",
+        "C/C23/n3018\\.c$",
+        "ClangScanDeps/module.*",
+        "ClangScanDeps/multiple-commands\\.c$",
+        "ClangScanDeps/optimize-vfs-edgecases\\.m$",
+        "ClangScanDeps/optimize-vfs-pch\\.m$",
+        "ClangScanDeps/visible-modules\\.c$",
+        "ClangScanDeps/Wsystem-headers-in-module\\.c$",
+        "CodeGen/builtins\\.c$",
+        "CodeGen/compound-literal\\.c$",
+        "CodeGenCUDA/static-device-var-rdc\\.cu$",
+        "CodeGenCXX/int64_uint64\\.cpp$",
+        "CodeGenCXX/pointers-to-data-members\\.cpp$",
+        "CodeGenOpenCLCXX/constexpr\\.clcpp$",
+        "Format/docs_updated\\.test$",
+        "Frontend/rewrite-includes-bom\\.c$",
+        "Interpreter/cxx20-modules\\.cppm$",
+        "Modules/crash-vfs-umbrella-frameworks\\.m$",
+        "Modules/double-quotes\\.m$",
+        "Modules/framework-public-includes-private\\.m$",
+        "Modules/implicit-module-header-maps\\.cpp$",
+        "Preprocessor/embed_constexpr\\.c$",
+        "Preprocessor/header-search-crash\\.c$",
+        "Preprocessor/headermap-rel\\.c$",
+        "Preprocessor/headermap-rel2\\.c$",
+        "Preprocessor/include-header-missing-in-framework-with-headermap\\.c$",
+        "Preprocessor/search-path-usage\\.m$",
+        "Sema/arithmetic-fence-builtin\\.c$",
+        "Sema/atomic-expr\\.c$",
+        "Sema/auto-type\\.c$",
+        "Sema/builtin-expect-with-probability\\.cpp$",
+        "Sema/c2x-auto\\.c$",
+        "Sema/constant-builtins-fmax\\.cpp$",
+        "Sema/constant-builtins-fmaximum-num\\.cpp$",
+        "Sema/constant-builtins-fmin\\.cpp$",
+        "Sema/constant-builtins-fminimum-num\\.cpp$",
+        "Sema/constexpr\\.c$",
+        "Sema/fp-eval-pragma-with-float-double_t-1\\.c$",
+        "Sema/fp-eval-pragma-with-float-double_t-2\\.c$",
+        "Sema/fp-eval-pragma-with-float-double_t-3\\.c$",
+    ]
+
+    def test_clang(self):
+        bitbake("clang -c install")
+        self.build_core_image()
+        ctx, qemu = self.start_qemu_nfs()
+        with ctx:
+            cmd, guest_result, host_result = self.run_llvm_lit(
+                "clang", extra_filter=self.CLANG_EXTRA_EXCLUDE
+            )
+            status, output = qemu.run(cmd, timeout=3600)
+            if status != 0:
+                raise AssertionError(f"llvm-lit failed for Clang: {output}")
+            status, _ = qemu.run(f"cp {guest_result} {host_result}")
+            if status != 0:
+                raise AssertionError("Failed to copy Clang lit results back to host")
+
+@OETestTag("toolchain-system")
+@OETestTag("toolchain-user")
+@OETestTag("runqemu")
+class LLDSelfTestSystemEmulated(ClangFamilyBase):
+
+    LLD_EXTRA_EXCLUDE = [
+        "ELF/fill-trap\\.s$",
+        "ELF/lto/cache-warnings\\.ll$",
+        "ELF/oformat-binary-ttext\\.s$",
+        "ELF/oformat-binary\\.s$",
+        "ELF/partition-synthetic-sections\\.s$",
+        "ELF/reproduce\\.s$",
+    ]
+
+    def test_lld(self):
+        bitbake("lld -c install")
+        self.build_core_image()
+        ctx, qemu = self.start_qemu_nfs()
+        with ctx:
+            cmd, guest_result, host_result = self.run_llvm_lit(
+                "lld", extra_filter=self.LLD_EXTRA_EXCLUDE
+            )
+            status, output = qemu.run(cmd, timeout=3600)
+            if status != 0:
+                raise AssertionError(f"llvm-lit failed for LLD: {output}")
+            status, _ = qemu.run(f"cp {guest_result} {host_result}")
+            if status != 0:
+                raise AssertionError("Failed to copy LLD lit results back to host")
-- 
2.49.0

Re: [OE-core] [PATCH 0/3 v6] Oe-selftest for Clang, LLVM, LLD

[Mathieu Dubois-Briand]

On Wed Jul 15, 2026 at 8:00 AM CEST, Deepesh via lists.openembedded.org Varatharajan wrote:
> From: Deepesh Varatharajan <Deepesh.Varatharajan@windriver.com>
>
> This patch series introduces a test framework to run selftests for
> target builds of Clang, LLVM, and LLD.
>

Hi Deepesh,

Thanks for your patch.

It looks like it does introduce reproducibility issues:

AssertionError: The following deb packages are different and not in exclusion list:
/srv/pokybuild/yocto-worker/reproducible/build/build-st/reproducibleB-extended/tmp/deploy/deb/./x86-64-v3/rust-dbg_1.97.0-r0_amd64.deb
/srv/pokybuild/yocto-worker/reproducible/build/build-st/reproducibleB-extended/tmp/deploy/deb/./x86-64-v3/rust_1.97.0-r0_amd64.deb
The following ipk packages are different and not in exclusion list:
/srv/pokybuild/yocto-worker/reproducible/build/build-st/reproducibleB-extended/tmp/deploy/ipk/./x86-64-v3/rust-dbg_1.97.0-r0_x86-64-v3.ipk
/srv/pokybuild/yocto-worker/reproducible/build/build-st/reproducibleB-extended/tmp/deploy/ipk/./x86-64-v3/rust_1.97.0-r0_x86-64-v3.ipk

https://autobuilder.yoctoproject.org/valkyrie/#/builders/37/builds/4386
https://valkyrie.yocto.io/pub/repro-fail/oe-reproducible-20260715-161pbdip/packages/diff-html/

I did not really identified where the difference come from. Can you have
a look at the issue?

Thanks,
Mathieu

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

Re: [OE-core] [PATCH 0/3 v6] Oe-selftest for Clang, LLVM, LLD

[Deepesh Varatharajan]

On 16-07-2026 12:44, Mathieu Dubois-Briand 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 Jul 15, 2026 at 8:00 AM CEST, Deepesh via lists.openembedded.org Varatharajan wrote:
>> From: Deepesh Varatharajan <Deepesh.Varatharajan@windriver.com>
>>
>> This patch series introduces a test framework to run selftests for
>> target builds of Clang, LLVM, and LLD.
>>
> Hi Deepesh,
>
> Thanks for your patch.
>
> It looks like it does introduce reproducibility issues:
>
> AssertionError: The following deb packages are different and not in exclusion list:
> /srv/pokybuild/yocto-worker/reproducible/build/build-st/reproducibleB-extended/tmp/deploy/deb/./x86-64-v3/rust-dbg_1.97.0-r0_amd64.deb
> /srv/pokybuild/yocto-worker/reproducible/build/build-st/reproducibleB-extended/tmp/deploy/deb/./x86-64-v3/rust_1.97.0-r0_amd64.deb
> The following ipk packages are different and not in exclusion list:
> /srv/pokybuild/yocto-worker/reproducible/build/build-st/reproducibleB-extended/tmp/deploy/ipk/./x86-64-v3/rust-dbg_1.97.0-r0_x86-64-v3.ipk
> /srv/pokybuild/yocto-worker/reproducible/build/build-st/reproducibleB-extended/tmp/deploy/ipk/./x86-64-v3/rust_1.97.0-r0_x86-64-v3.ipk
>
> https://autobuilder.yoctoproject.org/valkyrie/#/builders/37/builds/4386
> https://valkyrie.yocto.io/pub/repro-fail/oe-reproducible-20260715-161pbdip/packages/diff-html/
>
> I did not really identified where the difference come from. Can you have
> a look at the issue?
>
> Thanks,
> Mathieu
Hi Mathieu,

I don't think the reproducibility issue is caused by the clang testsuite 
changes.
Those changes are guarded by the `CLANG_ENABLE_TESTSUITE` variable, so 
they should
not affect a normal Rust build. Before sending the patch, I also ran a 
couple of
tests, including reproducibility testing, and did not encounter any issues.

I did a bit more digging into the AB builds and found the following:

https://autobuilder.yoctoproject.org/valkyrie/#/builders/37/builds/4378

It looks like the same Rust reproducibility failure occurred in your testing
two days ago, when the clang-testsuite related changes were not yet present
in your branch. I am not sure what is causing rust repro failures in AB.

Could you please run the reproducibility test one more time and let me know
if the failure occurs again?

If the reproducibility issue doesn't occur again, we should consider filing
a Yocto bug to track these intermittent Rust reproducibility failures.

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