[libcxx-commits] [libcxx] [libc++] Instantiate hash function externally (PR #127040)

[Louis Dionne via libcxx-commits]

================
@@ -12,6 +12,21 @@ To generate a summary, re-generate the new ABI list using the
 
 New entries should be added directly below the "Version" header.
 
+------------
+Version 21.0
+------------
+
+* [libc++] Instantiate hash function externally
+
+  This has multiple benefits:
+  - There is a single instance of our hash function, reducing object file size
+  - The hash implementation isn't instantiated in every TU anymore, reducing compile times
+  - Behind an ABI tag it would be possible to salt the hash
----------------
ldionne wrote:

```suggestion
  - Behind an ABI configuration macro, it would be possible to salt the hash
```

https://github.com/llvm/llvm-project/pull/127040