[libc-commits] [libc] [llvm] [libc] Configure CMAKE_REQUIRED_FLAGS so the GPU can use flag checks (PR #95424)

[LLVM Continuous Integration via libc-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `cross-project-tests-sie-ubuntu-dwarf5` running on `doug-worker-1b` while building `libc,llvm` at step 6 "test-build-unified-tree-check-cross-project".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/163/builds/585

Here is the relevant piece of the build log for the reference:
```
Step 6 (test-build-unified-tree-check-cross-project) failure: test (failure)
******************** TEST 'cross-project-tests :: debuginfo-tests/dexter/feature_tests/commands/perfect/dex_finish_test/limit_steps_conditional.cpp' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
RUN: at line 10: clang++ -O0 -glldb -std=gnu++11 /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/llvm-project/cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_finish_test/limit_steps_conditional.cpp -o /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/build/projects/cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_finish_test/Output/limit_steps_conditional.cpp.tmp
+ clang++ -O0 -glldb -std=gnu++11 /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/llvm-project/cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_finish_test/limit_steps_conditional.cpp -o /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/build/projects/cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_finish_test/Output/limit_steps_conditional.cpp.tmp
RUN: at line 11: "/usr/bin/python3.10" "/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/llvm-project/cross-project-tests/debuginfo-tests/dexter/dexter.py" test --fail-lt 1.0 -w --debugger lldb --binary /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/build/projects/cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_finish_test/Output/limit_steps_conditional.cpp.tmp -- /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/llvm-project/cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_finish_test/limit_steps_conditional.cpp | /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/build/bin/FileCheck /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/llvm-project/cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_finish_test/limit_steps_conditional.cpp
+ /usr/bin/python3.10 /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/llvm-project/cross-project-tests/debuginfo-tests/dexter/dexter.py test --fail-lt 1.0 -w --debugger lldb --binary /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/build/projects/cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_finish_test/Output/limit_steps_conditional.cpp.tmp -- /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/llvm-project/cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_finish_test/limit_steps_conditional.cpp
+ /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/build/bin/FileCheck /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/llvm-project/cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_finish_test/limit_steps_conditional.cpp
python3.10: /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/llvm-project/llvm/include/llvm/ADT/SmallVector.h:754: llvm::SmallVectorImpl<T>::iterator llvm::SmallVectorImpl<T>::erase(llvm::SmallVectorImpl<T>::const_iterator) [with T = std::pair<std::weak_ptr<lldb_private::Listener>, unsigned int>; llvm::SmallVectorImpl<T>::iterator = std::pair<std::weak_ptr<lldb_private::Listener>, unsigned int>*; llvm::SmallVectorImpl<T>::const_iterator = const std::pair<std::weak_ptr<lldb_private::Listener>, unsigned int>*]: Assertion `this->isReferenceToStorage(CI) && "Iterator to erase is out of bounds."' failed.

--

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


```

https://github.com/llvm/llvm-project/pull/95424