[PATCH] D34264: Introduce -Wunguarded-availability-new, which is like -Wunguarded-availability, except that it's enabled by default for new deployment targets

[Alex Lorenz via Phabricator via cfe-commits]

arphaman created this revision.

This patch adds a new warning flag called `-Wunguarded-availability-new`. If `-Wunguarded-availability` is off, this warning only warns about uses of APIs that have been introduced in macOS >= 10.13, iOS >= 11, watchOS >= 4 and tvOS >= 11. This warning is on by default. We decided to use this kind of solution as we didn't want to turn on `-Wunguarded-availability` by default, as we didn't want our users to get warnings about uses of old APIs in their existing projects.


Repository:
  rL LLVM

https://reviews.llvm.org/D34264

Files:
  include/clang/Basic/DiagnosticGroups.td
  include/clang/Basic/DiagnosticSemaKinds.td
  lib/Sema/SemaDeclAttr.cpp
  test/SemaObjC/unguarded-availability-new.m

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