https://github.com/hubert-reinterpretcast created 
https://github.com/llvm/llvm-project/pull/125368

#110503 updates the scope of `-fclang-abi-compat` but did not make that
clear in the release notes. This PR addresses that problem.


>From 4b3e4d5f38cf0f58ee8e8384455c0a235041315c Mon Sep 17 00:00:00 2001
From: Hubert Tong <hubert.reinterpretc...@gmail.com>
Date: Sat, 1 Feb 2025 19:52:32 -0400
Subject: [PATCH] Document -fclang-abi-compat=19 re: #110503

#110503 updates the scope of `-fclang-abi-compat` but did not make that
clear in the release notes. This PR addresses that problem.
---
 clang/docs/ReleaseNotes.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 88c9fc8f95e4a1..53534d821b2c9a 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -252,7 +252,7 @@ ABI Changes in This Version
 
 - Fixed Microsoft name mangling of placeholder, auto and decltype(auto), 
return types for MSVC 1920+. This change resolves incompatibilities with code 
compiled by MSVC 1920+ but will introduce incompatibilities with code compiled 
by earlier versions of Clang unless such code is built with the compiler option 
-fms-compatibility-version=19.14 to imitate the MSVC 1914 mangling behavior.
 - Fixed the Itanium mangling of the construction vtable name. This change will 
introduce incompatibilities with code compiled by Clang 19 and earlier 
versions, unless the -fclang-abi-compat=19 option is used. (#GH108015)
-- Mangle member-like friend function templates as members of the enclosing 
class. (#GH110247, #GH110503)
+- Mangle member-like friend function templates as members of the enclosing 
class. This can be disabled using -fclang-abi-compat=19. (#GH110247, #GH110503)
 
 AST Dumping Potentially Breaking Changes
 ----------------------------------------

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