[libcxx-commits] [libcxx] [libc++] Add #if 0 block to all the top-level headers (PR #119234)

[Nikolas Klauser via libcxx-commits]

philnik777 wrote:

For future reference, see https://github.com/llvm/llvm-project/pull/109002. Basically, the `0` here will be replaced by `__cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)` (or something very similar) in a later patch.


https://github.com/llvm/llvm-project/pull/119234