[libcxx-commits] [libcxx] [libc++] Remove _LIBCPP_DISABLE_AVAILABILITY macro (PR #112952)

[Louis Dionne via libcxx-commits]

================
@@ -85,6 +85,9 @@ Deprecations and Removals
 - The function ``__libcpp_verbose_abort()`` is now ``noexcept``, to match ``std::terminate()``. (The combination of
   ``noexcept`` and ``[[noreturn]]`` has special significance for function effects analysis.)
 
+- The ``_LIBCPP_DISABLE_AVAILABILITY`` macro that was used to force-disable availability markup has now been removed.
+  Whether availability markup is used by the library is now solely controlled at configuration-time.
----------------
ldionne wrote:

Yes, `-nostdinc++` works when a SDK is in use. There's nothing different when a SDK is in use, really: it's just that the sysroot where Clang starts looking for stuff is located inside the SDK, but all the behavior is otherwise the same.

https://github.com/llvm/llvm-project/pull/112952