| ======================================= |
| Clang 7.0.0 (In-Progress) Release Notes |
| ======================================= |
| |
| .. contents:: |
| :local: |
| :depth: 2 |
| |
| Written by the `LLVM Team <http://llvm.org/>`_ |
| |
| .. warning:: |
| |
| These are in-progress notes for the upcoming Clang 7 release. |
| Release notes for previous releases can be found on |
| `the Download Page <http://releases.llvm.org/download.html>`_. |
| |
| Introduction |
| ============ |
| |
| This document contains the release notes for the Clang C/C++/Objective-C |
| frontend, part of the LLVM Compiler Infrastructure, release 7.0.0. 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 <http://llvm.org/docs/ReleaseNotes.html>`_. All LLVM |
| releases may be downloaded from the `LLVM releases web |
| site <http://llvm.org/releases/>`_. |
| |
| For more information about Clang or LLVM, including information about the |
| latest release, please see the `Clang Web Site <http://clang.llvm.org>`_ or the |
| `LLVM Web Site <http://llvm.org>`_. |
| |
| 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 <http://llvm.org/releases/>`_. |
| |
| What's New in Clang 7.0.0? |
| ========================== |
| |
| 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 |
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| |
| - ``-Wc++98-compat-extra-semi`` is a new flag, which was previously inseparable |
| from ``-Wc++98-compat-pedantic``. The latter still controls the new flag. |
| |
| - ``-Wextra-semi`` now also controls ``-Wc++98-compat-extra-semi``. |
| Please do note that if you pass ``-Wno-c++98-compat-pedantic``, it implies |
| ``-Wno-c++98-compat-extra-semi``, so if you want that diagnostic, you need |
| to explicitly re-enable it (e.g. by appending ``-Wextra-semi``). |
| |
| 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 |
| ----------------------- |
| |
| - Before Clang 7.0, we prepended the `#` character to the `--autocomplete` |
| argument to enable cc1 flags. For example, when the `-cc1` or `-Xclang` flag |
| is in the :program:`clang` invocation, the shell executed |
| `clang --autocomplete=#-<flag to be completed>`. Clang 7.0 now requires the |
| whole invocation including all flags to be passed to the `--autocomplete` like |
| this: `clang --autocomplete=-cc1,-xc++,-fsyn`. |
| |
| New Pragmas in Clang |
| ----------------------- |
| |
| Clang now supports the ... |
| |
| |
| Attribute Changes in Clang |
| -------------------------- |
| |
| - Clang now supports function multiversioning with attribute 'target' on ELF |
| based x86/x86-64 environments by using indirect functions. This implementation |
| has a few minor limitations over the GCC implementation for the sake of AST |
| sanity, however it is otherwise compatible with existing code using this |
| feature for GCC. Consult the documentation for the target attribute for more |
| information. |
| |
| - ... |
| |
| Windows Support |
| --------------- |
| |
| Clang's support for building native Windows programs ... |
| |
| |
| 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 |
| ---------------------------------- |
| |
| ... |
| |
| OpenMP Support in Clang |
| ---------------------------------- |
| |
| - ... |
| |
| Internal API Changes |
| -------------------- |
| |
| These are major API changes that have happened since the 6.0.0 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. |
| |
| - ... |
| |
| AST Matchers |
| ------------ |
| |
| - ... |
| |
| clang-format |
| ------------ |
| |
| - ... |
| |
| libclang |
| -------- |
| |
| ... |
| |
| |
| Static Analyzer |
| --------------- |
| |
| - ... |
| |
| ... |
| |
| 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 <http://clang.llvm.org/>`_. 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 <http://lists.llvm.org/mailman/listinfo/cfe-dev>`_. |
