[libc++] Enable deprecation warnings by default

Summary:
In r342843, I added deprecation warnings to some facilities that were
deprectated in C++14 and C++17. However, those deprecation warnings
were not enabled by default.

After discussing this on IRC, we had finally gotten consensus to enable
those warnings by default, and I'm getting around to doing that only
now.

Reviewers: mclow.lists, EricWF

Subscribers: christof, jkorous, dexonsmith, jdoerfert, libcxx-commits

Differential Revision: https://reviews.llvm.org/D58140

llvm-svn: 355961

1 files changed, 5 insertions, 5 deletions

diff --git a/libcxx/docs/UsingLibcxx.rst b/libcxx/docs/UsingLibcxx.rst
index 899656cca1d..7b06189c648 100644
--- a/libcxx/docs/UsingLibcxx.rst
+++ b/libcxx/docs/UsingLibcxx.rst
@@ -242,11 +242,11 @@ thread safety annotations.
   purely as an extension. See :ref:`Extended Applications of [[nodiscard]] <nodiscard extension>`
   for more information.
 
-**_LIBCPP_ENABLE_DEPRECATION_WARNINGS**:
-  This macro enables warnings when using deprecated components. For example,
-  when compiling in C++11 mode, using `std::auto_ptr` with the macro defined
-  will trigger a warning saying that `std::auto_ptr` is deprecated. By default,
-  this macro is not defined.
+**_LIBCPP_DISABLE_DEPRECATION_WARNINGS**:
+  This macro disables warnings when using deprecated components. For example,
+  using `std::auto_ptr` when compiling in C++11 mode will normally trigger a
+  warning saying that `std::auto_ptr` is deprecated. If the macro is defined,
+  no warning will be emitted. By default, this macro is not defined.
 
 C++17 Specific Configuration Macros
 -----------------------------------