[libcxx-commits] [libcxx] [libc++] Run the Lit test suite against an installed version of the library (PR #96910)

[LLVM Continuous Integration via libcxx-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-win-x-aarch64` running on `as-builder-2` while building `libcxx` at step 15 "test-libc++".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/193/builds/2254

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 15 (test-libc++) failure: Test just built components: libc++ completed (failure)
******************** TEST 'llvm-libc++-static.cfg.in :: C:\buildbot\as-builder-2\x-aarch64\build\runtimes\runtimes-aarch64-unknown-linux-gnu-bins\test\libcxx\double_include.gen.py\bit.sh.cpp' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 4
C:/buildbot/as-builder-2/x-aarch64/build/./bin/clang++.exe -c C:\buildbot\as-builder-2\x-aarch64\build\runtimes\runtimes-aarch64-unknown-linux-gnu-bins\test\libcxx\double_include.gen.py\bit.sh.cpp -o C:\buildbot\as-builder-2\x-aarch64\build\runtimes\runtimes-aarch64-unknown-linux-gnu-bins\test\libcxx\double_include.gen.py\Output\bit.sh.cpp.dir\t.tmp.first.o -pthread --target=aarch64-unknown-linux-gnu -nostdinc++ -I C:/buildbot/as-builder-2/x-aarch64/build/runtimes/runtimes-aarch64-unknown-linux-gnu-bins/libcxx/test-suite-install/include/c++/v1 -I C:/buildbot/as-builder-2/x-aarch64/build/runtimes/runtimes-aarch64-unknown-linux-gnu-bins/libcxx/test-suite-install/include/aarch64-unknown-linux-gnu/c++/v1 -I C:/buildbot/as-builder-2/x-aarch64/llvm-project/libcxx/test/support -std=c++26 -Werror -Wall -Wctad-maybe-unsupported -Wextra -Wshadow -Wundef -Wunused-template -Wno-unused-command-line-argument -Wno-attributes -Wno-pessimizing-move -Wno-noexcept-type -Wno-atomic-alignment -Wno-reserved-module-identifier -Wdeprecated-copy -Wdeprecated-copy-dtor -Wno-user-defined-literals -Wno-tautological-compare -Wsign-compare -Wunused-variable -Wunused-parameter -Wunreachable-code -Wno-unused-local-typedef -Wno-local-type-template-args -Wno-c++11-extensions -Wno-unknown-pragmas -Wno-pass-failed -Wno-mismatched-new-delete -Wno-redundant-move -Wno-self-move -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCPP_ENABLE_EXPERIMENTAL -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_NONE -Werror=thread-safety -Wuser-defined-warnings
# executed command: C:/buildbot/as-builder-2/x-aarch64/build/./bin/clang++.exe -c 'C:\buildbot\as-builder-2\x-aarch64\build\runtimes\runtimes-aarch64-unknown-linux-gnu-bins\test\libcxx\double_include.gen.py\bit.sh.cpp' -o 'C:\buildbot\as-builder-2\x-aarch64\build\runtimes\runtimes-aarch64-unknown-linux-gnu-bins\test\libcxx\double_include.gen.py\Output\bit.sh.cpp.dir\t.tmp.first.o' -pthread --target=aarch64-unknown-linux-gnu -nostdinc++ -I C:/buildbot/as-builder-2/x-aarch64/build/runtimes/runtimes-aarch64-unknown-linux-gnu-bins/libcxx/test-suite-install/include/c++/v1 -I C:/buildbot/as-builder-2/x-aarch64/build/runtimes/runtimes-aarch64-unknown-linux-gnu-bins/libcxx/test-suite-install/include/aarch64-unknown-linux-gnu/c++/v1 -I C:/buildbot/as-builder-2/x-aarch64/llvm-project/libcxx/test/support -std=c++26 -Werror -Wall -Wctad-maybe-unsupported -Wextra -Wshadow -Wundef -Wunused-template -Wno-unused-command-line-argument -Wno-attributes -Wno-pessimizing-move -Wno-noexcept-type -Wno-atomic-alignment -Wno-reserved-module-identifier -Wdeprecated-copy -Wdeprecated-copy-dtor -Wno-user-defined-literals -Wno-tautological-compare -Wsign-compare -Wunused-variable -Wunused-parameter -Wunreachable-code -Wno-unused-local-typedef -Wno-local-type-template-args -Wno-c++11-extensions -Wno-unknown-pragmas -Wno-pass-failed -Wno-mismatched-new-delete -Wno-redundant-move -Wno-self-move -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCPP_ENABLE_EXPERIMENTAL -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_NONE -Werror=thread-safety -Wuser-defined-warnings
# .---command stderr------------
# | C:\buildbot\as-builder-2\x-aarch64\build\runtimes\runtimes-aarch64-unknown-linux-gnu-bins\test\libcxx\double_include.gen.py\bit.sh.cpp:9:10: fatal error: 'bit' file not found
# |     9 | #include <bit>
# |       |          ^~~~~
# | 1 error generated.
# `-----------------------------
# error: command failed with exit status: 1

--

********************


```

</details>

https://github.com/llvm/llvm-project/pull/96910