[libcxx-commits] [libcxx] [libc++] Inline fast path for`exception_ptr` copy constructor & destructor (PR #165909)

[Adrian Vogelsgesang via libcxx-commits]

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@@ -82,17 +85,42 @@ class _LIBCPP_EXPORTED_FROM_ABI exception_ptr {
   _LIBCPP_HIDE_FROM_ABI exception_ptr() _NOEXCEPT : __ptr_() {}
   _LIBCPP_HIDE_FROM_ABI exception_ptr(nullptr_t) _NOEXCEPT : __ptr_() {}
 
+// These symbols are still exported from the library to prevent ABI breakage.
+#  ifdef _LIBCPP_BUILDING_LIBRARY
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vogelsgesang wrote:

I think in this particular case, we won't need availability markup.

Afaict, availability markup is needed for newly introduced symbols.
However, I am not introducing a new symbol. I am turning an existing symbol into a no-longer used symbol.

https://github.com/llvm/llvm-project/pull/165909