| ===================================== |
| Clang 3.5 (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 3.5 release. You may |
| prefer the `Clang 3.4 Release Notes |
| <http://llvm.org/releases/3.4/tools/clang/docs/ReleaseNotes.html>`_. |
| |
| Introduction |
| ============ |
| |
| This document contains the release notes for the Clang C/C++/Objective-C |
| frontend, part of the LLVM Compiler Infrastructure, release 3.5. 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 check out the main 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 3.5? |
| ======================== |
| |
| 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 |
| ------------------ |
| |
| - Clang uses the new MingW ABI |
| GCC 4.7 changed the mingw ABI. Clang 3.4 and older use the GCC 4.6 |
| ABI. Clang 3.5 and newer use the GCC 4.7 abi. |
| |
| - The __has_attribute feature test is now target-aware. Older versions of Clang |
| would return true when the attribute spelling was known, regardless of whether |
| the attribute was available to the specific target. Clang now returns true only |
| when the attribute pertains to the current compilation target. |
| |
| |
| Improvements to Clang's diagnostics |
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| |
| Clang's diagnostics are constantly being improved to catch more issues, |
| explain them more clearly, and provide more accurate source information |
| about them. The improvements since the 3.4 release include: |
| |
| - ... |
| |
| New Compiler Flags |
| ------------------ |
| |
| The integrated assembler is now turned on by default on ARM (and Thumb), |
| so the use of the option `-fintegrated-as` is now redundant on those |
| architectures. This is an important move to both *eat our own dog food* |
| and to ease cross-compilation tremendously. |
| |
| We are aware of the problems that this may cause for code bases that |
| rely on specific GNU syntax or extensions, and we're working towards |
| getting them all fixed. Please, report bugs or feature requests if |
| you find anything. In the meantime, use `-fno-integrated-as` to revert |
| back the call to GNU assembler. |
| |
| In order to provide better diagnostics, the integrated assembler validates |
| inline assembly when the integrated assembler is enabled. Because this is |
| considered a feature of the compiler, it is controlled via the `fintegrated-as` |
| and `fno-integrated-as` flags which enable and disable the integrated assembler |
| respectively. `-integrated-as` and `-no-integrated-as` are now considered |
| legacy flags (but are available as an alias to prevent breaking existing users), |
| and users are encouraged to switch to the equivalent new feature flag. |
| |
| Deprecated flags `-faddress-sanitizer`, `-fthread-sanitizer`, |
| `-fcatch-undefined-behavior` and `-fbounds-checking` were removed in favor of |
| `-fsanitize=` family of flags. |
| |
| C Language Changes in Clang |
| --------------------------- |
| |
| ... |
| |
| C11 Feature Support |
| ^^^^^^^^^^^^^^^^^^^ |
| |
| ... |
| |
| C++ Language Changes in Clang |
| ----------------------------- |
| |
| - ... |
| |
| C++11 Feature Support |
| ^^^^^^^^^^^^^^^^^^^^^ |
| |
| ... |
| |
| Objective-C Language Changes in Clang |
| ------------------------------------- |
| |
| ... |
| |
| OpenCL C Language Changes in Clang |
| ---------------------------------- |
| |
| ... |
| |
| Internal API Changes |
| -------------------- |
| |
| These are major API changes that have happened since the 3.4 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. |
| |
| ... |
| |
| libclang |
| -------- |
| |
| ... |
| |
| Static Analyzer |
| --------------- |
| |
| ... |
| |
| 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.cs.uiuc.edu/mailman/listinfo/cfe-dev>`_. |
