Add markup for libc++ dylib availability

Libc++ is used as a system library on macOS and iOS (amongst others). In order
for users to be able to compile a binary that is intended to be deployed to an
older version of the platform, clang provides the
availability attribute <https://clang.llvm.org/docs/AttributeReference.html#availability>_
that can be placed on declarations to describe the lifecycle of a symbol in the
library.

See docs/DesignDocs/AvailabilityMarkup.rst for more information.

Differential Revision: https://reviews.llvm.org/D31739

llvm-svn: 302172

1 files changed, 6 insertions, 0 deletions

diff --git a/libcxx/test/std/experimental/optional/optional.bad_optional_access/default.pass.cpp b/libcxx/test/std/experimental/optional/optional.bad_optional_access/default.pass.cpp
index c166bb72a83..f269149829d 100644
--- a/libcxx/test/std/experimental/optional/optional.bad_optional_access/default.pass.cpp
+++ b/libcxx/test/std/experimental/optional/optional.bad_optional_access/default.pass.cpp
@@ -8,6 +8,12 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: c++98, c++03, c++11
+// XFAIL: availability=macosx10.12
+// XFAIL: availability=macosx10.11
+// XFAIL: availability=macosx10.10
+// XFAIL: availability=macosx10.9
+// XFAIL: availability=macosx10.8
+// XFAIL: availability=macosx10.7
 
 // <optional>