[clang] [llvm] Conditionalize use of POSIX features missing on WASI/WebAssembly (PR #92677)

[via cfe-commits]

whitequark wrote:

Failed test is:
```

******************** TEST 'LLVM-Unit :: Support/./SupportTests.exe/41/43' FAILED ********************
Script(shard):
--
GTEST_OUTPUT=json:C:\ws\src\build\unittests\Support\.\SupportTests.exe-LLVM-Unit-43852-41-43.json GTEST_SHUFFLE=0 GTEST_TOTAL_SHARDS=43 GTEST_SHARD_INDEX=41 C:\ws\src\build\unittests\Support\.\SupportTests.exe
--
Script:
--
C:\ws\src\build\unittests\Support\.\SupportTests.exe --gtest_filter=LockFileManagerTest.Basic
--
C:\ws\src\llvm\unittests\Support\LockFileManagerTest.cpp(35): error: Expected: (LockFileManager::LFS_Owned) != (Locked2.getState()), actual: 0 vs 0
C:\ws\src\llvm\unittests\Support\LockFileManagerTest.cpp:35
Expected: (LockFileManager::LFS_Owned) != (Locked2.getState()), actual: 0 vs 0
********************
```

This doesn't seem to make any sense since expected == actual here?

https://github.com/llvm/llvm-project/pull/92677