======================================== Clang 10.0.0 (In-Progress) Release Notes ======================================== .. contents:: :local: :depth: 2 Written by the `LLVM Team `_ .. warning:: These are in-progress notes for the upcoming Clang 10 release. Release notes for previous releases can be found on `the Download Page `_. Introduction ============ This document contains the release notes for the Clang C/C++/Objective-C frontend, part of the LLVM Compiler Infrastructure, release 10.0.0. Here we describe the status of Clang in some detail, including major improvements from the previous release and new feature work. For the general LLVM release notes, see `the LLVM documentation `_. All LLVM releases may be downloaded from the `LLVM releases web site `_. For more information about Clang or LLVM, including information about the latest release, please see the `Clang Web Site `_ or the `LLVM Web Site `_. Note that if you are reading this file from a Subversion checkout or the main Clang web page, this document applies to the *next* release, not the current one. To see the release notes for a specific release, please see the `releases page `_. What's New in Clang 10.0.0? =========================== Some of the major new features and improvements to Clang are listed here. Generic improvements to Clang as a whole or to its underlying infrastructure are described first, followed by language-specific sections with improvements to Clang's support for those languages. Major New Features ------------------ - ... Improvements to Clang's diagnostics ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ - ... Non-comprehensive list of changes in this release ------------------------------------------------- - ... New Compiler Flags ------------------ - ... Deprecated Compiler Flags ------------------------- The following options are deprecated and ignored. They will be removed in future versions of Clang. - ... Modified Compiler Flags ----------------------- - ... New Pragmas in Clang -------------------- - ... Attribute Changes in Clang -------------------------- - ... Windows Support --------------- - clang-cl now defaults to ``/Zc:twoPhase`` if targeting MSVC2017 update 3 or later (``_MSC_VER`` >= 1911). This matches MSVC's behavior. Explicitly pass ``/Zc:twoPhase-`` to restore the old behavior. - ... C Language Changes in Clang --------------------------- - ... C11 Feature Support ^^^^^^^^^^^^^^^^^^^ ... C++ Language Changes in Clang ----------------------------- - ... C++1z Feature Support ^^^^^^^^^^^^^^^^^^^^^ ... Objective-C Language Changes in Clang ------------------------------------- - ... OpenCL C Language Changes in Clang ---------------------------------- ... ABI Changes in Clang -------------------- - ... OpenMP Support in Clang ----------------------- - ... CUDA Support in Clang --------------------- - ... Internal API Changes -------------------- These are major API changes that have happened since the 9.0.0 release of Clang. If upgrading an external codebase that uses Clang as a library, this section should help get you past the largest hurdles of upgrading. Build System Changes -------------------- These are major changes to the build system that have happened since the 9.0.0 release of Clang. Users of the build system should adjust accordingly. - In 8.0.0 and below, the install-clang-headers target would install clang's resource directory headers. This installation is now performed by the install-clang-resource-headers target. Users of the old install-clang-headers target should switch to the new install-clang-resource-headers target. The install-clang-headers target now installs clang's API headers (corresponding to its libraries), which is consistent with the install-llvm-headers target. - In 9.0.0 and later Clang added a new target, clang-cpp, which generates a shared library comprised of all the clang component libraries and exporting the clang C++ APIs. Additionally the build system gained the new "CLANG_LINK_CLANG_DYLIB" option, which defaults Off, and when set to On, will force clang (and clang-based tools) to link the clang-cpp library instead of statically linking clang's components. This option will reduce the size of binary distributions at the expense of compiler performance. - ... AST Matchers ------------ - ... clang-format ------------ - ... libclang -------- - ... Static Analyzer --------------- - ... .. _release-notes-ubsan: Undefined Behavior Sanitizer (UBSan) ------------------------------------ - ... Core Analysis Improvements ========================== - ... New Issues Found ================ - ... Python Binding Changes ---------------------- The following methods have been added: - ... Significant Known Problems ========================== Additional Information ====================== A wide variety of additional information is available on the `Clang web page `_. The web page contains versions of the API documentation which are up-to-date with the Subversion version of the source code. You can access versions of these documents specific to this release by going into the "``clang/docs/``" directory in the Clang tree. If you have any questions or comments about Clang, please feel free to contact us via the `mailing list `_.