[llvm-branch-commits] [clang] [SystemZ][ReleaseNotes] clang release notes for SystemZ (PR #215370)

[Dickson Chau via llvm-branch-commits]

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@@ -1163,6 +1163,10 @@ latest release, please see the [Clang Web Site](https://clang.llvm.org) or the
 - Add support for `#pragma export` for z/OS. This is a pragma used to export functions and variables
   with external linkage from shared libraries. It provides compatibility with the IBM XL C/C++
   compiler.
+- Add support for variable argument lists on z/OS.
+- Add compare-and-swap builtin functions, as provided by the IBM XL C/C++ compiler.
+- Add new wrapper headers for z/OS to improve compatibility with the system headers.
+- Raised minimal supported target level to z/OS 3.1.
----------------
dicksonchau wrote:

```suggestion
- Raised minimal supported target OS level to z/OS 3.1.
```

https://github.com/llvm/llvm-project/pull/215370