Commit 193cda10 authored by Mark de Wever's avatar Mark de Wever
Browse files

[libc++][doc] Update the release notes. 

Updates the libc++ release notes with the changes since the last
release.

Differential Revision: https://reviews.llvm.org/D95248
parent e9cc5fef

libcxx/docs/ReleaseNotes.rst

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@@ -37,8 +37,31 @@ What's New in Libc++ 12.0.0? 


New Features

------------

- Random device support has been made optional. It's enabled by default and can

  be disabled by building libc++ with ``-DLIBCXX_ENABLE_RANDOM_DEVICE=OFF``.

  Disabling random device support can be useful when building the library for

  platforms that don't have a source of randomness, such as some embedded

  platforms. When this is not supported, most of ``<random>`` will still be

  available, but ``std::random_device`` will not.

- Localization support has been made optional. It's enabled by default and can

  be disabled by building libc++ with ``-DLIBCXX_ENABLE_LOCALIZATION=OFF``.

  Disabling localization can be useful when porting to platforms that don't

  support the C locale API (e.g. embedded). When localization is not

  supported, several parts of the library will be disabled: ``<iostream>``,

  ``<regex>``, ``<locale>`` will be completely unusable, and other parts may be

  only partly available.

- If libc++ is compiled with a C++20 capable compiler it will be compiled in

  C++20 mode. Else libc++ will be compiled in C++17 mode.

- Several unqualified lookups in libc++ have been changed to qualified lookups.

  This makes libc++ more ADL-proof.

- The libc++ implementation status pages have been overhauled. Like other parts

  documentation they now use restructured text instead of html. Starting with

  libc++12 the status pages are part of libc++'s documentation.

- More C++20 features have been implemented. :doc:`Cxx2aStatus` has the full

  overview of libc++'s C++20 implementation status.

- Work has started to implement new C++2b features. :doc:`Cxx2bStatus` has the

  full overview of libc++'s C++2b implementation status.



- ...



API Changes

-----------

libcxx/docs/index.rst

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@@ -140,7 +140,7 @@ C++ Dialect Support 
* :ref:`C++14 - Complete <cxx1y-status>`

* :ref:`C++17 - In Progress <cxx1z-status>`

* :ref:`C++20 - In Progress <cxx2a-status>`

* :ref:`C++2b - Not Started <cxx2b-status>`

* :ref:`C++2b - In Progress <cxx2b-status>`

* `Post C++14 Technical Specifications - In Progress <http://libcxx.llvm.org/ts1z_status.html>`__

* :ref:`C++ Feature Test Macro Status <feature-status>`