[clang] [C23] Use thread_local semantics (PR #70107)

[Mariya Podchishchaeva via cfe-commits]

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@@ -493,6 +493,9 @@ Bug Fixes in This Version
   Fixes (`#65143 <https://github.com/llvm/llvm-project/issues/65143>`_)
 - Fix crash in formatting the real/imaginary part of a complex lvalue.
   Fixes (`#69218 <https://github.com/llvm/llvm-project/issues/69218>`_)
+- No longer use C++ ``thread_local`` semantics in C23 when using
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Fznamznon wrote:

Does this patch also help with https://github.com/llvm/llvm-project/issues/69167 ?

https://github.com/llvm/llvm-project/pull/70107