[PATCH 0/4] Oe-selftest for Clang, LLVM, LLD

Deepesh.Varatharajan
2026-02-20T06:03:10Z

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

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
-Patch 3: Selftest script for Clang, LLVM, and LLD including exclude list
-Patch 4: Fix rust build failure by replacing target llvm-config with native

Testing:
1. The test suite has been successfully validated on x86-64, arm64, riscv64
and arm32 for all Clang, LLD & LLVM components.
2. Clang and LLD tests passed successfully on x86. LLVM tests are skipped
on x86 since it's broken. A follow-up bug will be filed and addressed.
3. 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:
| 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 tmpdir size:
| Metric | Size |
| ------------------------------------ | ----- |
| Default target `tmpdir` size | 74 GB |
| Target `tmpdir` size (after changes) | 79 GB |
| Difference | +5 GB |

Deepesh Varatharajan (4):
clang-tools-extra: disable tests
clang: Enable cmake flags for llvm, clang, lld tests
oeqa/selftest/clang: Add oe-seltests for Clang/LLVM/LLD
rust: Fix rust build failure

meta/lib/oeqa/selftest/cases/clang.py | 298 ++++++++++++++++++
.../0042-guard-clang-tools-extra-test.patch | 74 +++++
meta/recipes-devtools/clang/clang_git.bb | 2 +
meta/recipes-devtools/clang/common.inc | 1 +
meta/recipes-devtools/clang/lld_git.bb | 2 +
meta/recipes-devtools/clang/llvm_git.bb | 8 +-
meta/recipes-devtools/rust/rust_1.93.0.bb | 5 +-
7 files changed, 387 insertions(+), 3 deletions(-)
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

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2.49.0