[PATCH] D34556: [libcxx] Annotate c++17 aligned new/delete operators with availability attribute

[Akira Hatanaka via Phabricator via cfe-commits]

ahatanak created this revision.

This is needed because older versions of libc++ do not have these operators. If users target an older deployment target and try to compile programs in which these operators are explicitly called, the compiler will complain.

The following is the list of minimum deployment targets for the four OSes:

macosx: 10.13
ios: 11.0
tvos: 11.0
watchos: 4.0

I followed the other availability macros in using "strict", but I'm not sure this was the right decision. The documentation seems to recommend not using "strict" (it says that weakly-linking is almost always a better API choice).

rdar://problem/32664169


https://reviews.llvm.org/D34556

Files:
  include/__config
  include/new
  test/std/language.support/support.dynamic/new.delete/new.delete.placement/new_deployment.fail.cpp

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