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===========================================
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Clang |release| |ReleaseNotesTitle|
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===========================================
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.. contents::
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:local:
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:depth: 2
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Written by the `LLVM Team <https://llvm.org/>`_
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.. only:: PreRelease
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.. warning::
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These are in-progress notes for the upcoming Clang |version| release.
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Release notes for previous releases can be found on
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`the Download Page <https://releases.llvm.org/download.html>`_.
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Introduction
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============
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This document contains the release notes for the Clang C/C++/Objective-C
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frontend, part of the LLVM Compiler Infrastructure, release |release|. Here we
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describe the status of Clang in some detail, including major
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improvements from the previous release and new feature work. For the
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general LLVM release notes, see `the LLVM
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documentation <https://llvm.org/docs/ReleaseNotes.html>`_. All LLVM
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releases may be downloaded from the `LLVM releases web
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site <https://llvm.org/releases/>`_.
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For more information about Clang or LLVM, including information about the
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latest release, please see the `Clang Web Site <https://clang.llvm.org>`_ or the
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`LLVM Web Site <https://llvm.org>`_.
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Note that if you are reading this file from a Git checkout or the
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main Clang web page, this document applies to the *next* release, not
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the current one. To see the release notes for a specific release, please
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see the `releases page <https://llvm.org/releases/>`_.
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What's New in Clang |release|?
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==============================
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Some of the major new features and improvements to Clang are listed
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here. Generic improvements to Clang as a whole or to its underlying
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infrastructure are described first, followed by language-specific
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sections with improvements to Clang's support for those languages.
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Major New Features
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------------------
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Bug Fixes
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---------
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- ``-Wtautological-compare`` missed warnings for tautological comparisons
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involving a negative integer literal. This fixes
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`Issue 42918 <https://github.com/llvm/llvm-project/issues/42918>`_.
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- Fixes an accepts-invalid bug in C when using a ``_Noreturn`` function
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specifier on something other than a function declaration. This fixes
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`Issue 56800 <https://github.com/llvm/llvm-project/issues/56800>`_.
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Improvements to Clang's diagnostics
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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- Clang will now correctly diagnose as ill-formed a constant expression where an
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enum without a fixed underlying type is set to a value outside the range of
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the enumeration's values. Fixes
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`Issue 50055: <https://github.com/llvm/llvm-project/issues/50055>`_.
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Non-comprehensive list of changes in this release
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-------------------------------------------------
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New Compiler Flags
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------------------
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Deprecated Compiler Flags
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-------------------------
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Modified Compiler Flags
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-----------------------
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Removed Compiler Flags
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-------------------------
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New Pragmas in Clang
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--------------------
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- ...
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Attribute Changes in Clang
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--------------------------
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Windows Support
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---------------
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AIX Support
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-----------
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C Language Changes in Clang
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---------------------------
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C2x Feature Support
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-------------------
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C++ Language Changes in Clang
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-----------------------------
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C++20 Feature Support
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^^^^^^^^^^^^^^^^^^^^^
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C++2b Feature Support
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^^^^^^^^^^^^^^^^^^^^^
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CUDA/HIP Language Changes in Clang
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----------------------------------
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Objective-C Language Changes in Clang
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-------------------------------------
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OpenCL C Language Changes in Clang
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----------------------------------
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...
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ABI Changes in Clang
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--------------------
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OpenMP Support in Clang
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-----------------------
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...
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CUDA Support in Clang
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---------------------
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- ...
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X86 Support in Clang
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--------------------
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DWARF Support in Clang
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----------------------
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Arm and AArch64 Support in Clang
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--------------------------------
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Floating Point Support in Clang
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-------------------------------
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Internal API Changes
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--------------------
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Build System Changes
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--------------------
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AST Matchers
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------------
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clang-format
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------------
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clang-extdef-mapping
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--------------------
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libclang
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--------
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Static Analyzer
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---------------
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.. _release-notes-ubsan:
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Undefined Behavior Sanitizer (UBSan)
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------------------------------------
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Core Analysis Improvements
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==========================
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- ...
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New Issues Found
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================
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- ...
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Python Binding Changes
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----------------------
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The following methods have been added:
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- ...
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Significant Known Problems
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==========================
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Additional Information
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======================
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A wide variety of additional information is available on the `Clang web
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page <https://clang.llvm.org/>`_. The web page contains versions of the
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API documentation which are up-to-date with the Git version of
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the source code. You can access versions of these documents specific to
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this release by going into the "``clang/docs/``" directory in the Clang
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tree.
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If you have any questions or comments about Clang, please feel free to
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contact us on the Discourse forums (Clang Frontend category)
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<https://discourse.llvm.org/c/clang/6>`_.
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